CN217037192U - Optical network capacity expansion equipment - Google Patents

Abstract

The application provides an optical network capacity expansion device, includes: the light receiving components are used for receiving light signals and outputting electric signals through electric signal output ends of the light receiving components; the input ends of the logic circuits are connected with the detection signal output end of the light receiving component; the switch circuit comprises a plurality of input ends, a plurality of control ends and a plurality of switching circuits, wherein the input ends are connected with the electric signal output end of the light receiving component, the control ends are connected with the output end of the logic circuit, and the corresponding input ends and output ends are conducted according to control signals received by the control ends; and the electrical signal input end of the light emitting component is connected with the output end of the switch circuit, and the light emitting component emits light signals according to the received electrical signals. The optical network capacity expansion equipment provided by the application is used for connecting the optical line terminal and the optical network components, and can accommodate more optical network components under one optical line terminal.

Description

Optical network capacity expansion equipment

Technical Field

The application relates to the technical field of optical fiber communication, in particular to optical network capacity expansion equipment.

Background

An Optical Network (Optical Network) generally refers to a wide area Network, a metropolitan area Network or a newly-built large-scale local area Network using an Optical fiber as a main transmission medium, and has the characteristics of high transmission speed, long transmission distance and the like. The Optical Network includes an OLT (Optical Line Terminal) and an ONU (Optical Network Unit), which are core components of the Optical access Network.

The optical network comprises an uplink network and a downlink network; wherein: in an uplink network, an ONU transmits an optical signal to an optical splitter, the optical splitter transmits an aggregated optical signal to an OLT, and then the OLT transmits the optical signal to an optical fiber backbone network; in the downlink network, the OLT transmits optical data signals transmitted from the optical fiber backbone network to the optical splitters, and then the optical splitters transmit the optical data signals to the corresponding ONUs, respectively. However, in the conventional optical network, one OLT can accommodate only 32 ONUs at most, and when the number of ONUs is as large as 32, the OLT needs to be increased, which makes the optical network complex to lay.

SUMMERY OF THE UTILITY MODEL

An embodiment of the present application provides an optical network capacity expansion device, configured to connect an optical line terminal and an optical network component, so as to facilitate capacity expansion of an optical network, so that one OLT accommodates more ONUs.

The application provides an optical network capacity expansion device, includes:

the light receiving components are used for receiving light signals and outputting electric signals through electric signal output ends of the light receiving components;

a logic circuit, several input ends of which are connected with the detection signal output end of the light receiving component, and the signal received from the detection signal output end outputs a control signal from the output end;

the switch circuit comprises a plurality of input ends, a plurality of control ends and a plurality of switching circuits, wherein the input ends are connected with the electric signal output end of the light receiving component, the control ends are connected with the output end of the logic circuit so as to receive the control signal output by the output end, and the corresponding input end and output end are conducted according to the control signal received by the control ends;

and the electrical signal input end of the light emitting component is connected with the output end of the switch circuit, and emits a light signal according to the received electrical signal.

The application provides an among the optical network dilatation equipment, including a plurality of light receiving component, the detection signal output end of light receiving component connects logic circuit's input, logic circuit's output connection switch circuit's control end, switch circuit's input connection corresponds the signal of telecommunication output end of connecting light transceiver module, switch circuit's output connection light emission subassembly's the signal of telecommunication input end, light emission subassembly's light signal output end is used for connecting optical line terminal. In specific use, the optical signal input end of each optical receiving assembly can be connected with an optical splitter, each optical splitter can be connected with a plurality of optical network components, and each optical receiving assembly is connected with the plurality of optical network components through the optical splitter; when the optical receiving component receives the optical signal sent by the optical network component, the optical receiving component outputs a detection signal through the electrical signal output end. When the logic circuit receives the detection signal sent by the light receiving assembly and generates a control signal through logic operation, the control signal is sent to the switch circuit through the output end, the switch circuit conducts the corresponding input end and output end according to the received control signal, so that the electric signal output end of the corresponding light receiving assembly is conducted with the electric signal input end of the light emitting assembly, and the light emitting assembly can correspondingly receive the received signal. Therefore, the optical network capacity expansion device provided by the application is used for connecting the optical line terminal and the optical network components, and can accommodate more optical network components under one optical line terminal.

Drawings

In order to more clearly illustrate the technical solutions in the present disclosure, the drawings needed to be used in some embodiments of the present disclosure will be briefly described below, and it is apparent that the drawings in the following description are only drawings of some embodiments of the present disclosure, and other drawings can be obtained by those skilled in the art according to the drawings. Furthermore, the drawings in the following description may be regarded as schematic diagrams, and do not limit the actual size of products, the actual flow of methods, the actual timing of signals, and the like, involved in the embodiments of the present disclosure.

FIG. 1 is a schematic diagram of an optical network architecture according to some embodiments;

fig. 2 is a schematic structural diagram of an optical network capacity expansion device according to some embodiments;

fig. 3 is a schematic structural diagram of an optical network capacity expansion device according to some embodiments;

FIG. 4 is a circuit diagram of a logic circuit provided in accordance with some embodiments;

FIG. 5 is a circuit diagram of another logic circuit provided in accordance with some embodiments;

fig. 6 is a circuit diagram of yet another logic circuit provided in accordance with some embodiments.

Detailed Description

Technical solutions in some embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present disclosure, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments provided in the present disclosure are within the scope of protection of the present disclosure.

Unless the context requires otherwise, throughout the description and the claims, the word "comprise" and its other forms, such as "comprises" and "comprising", will be interpreted as open, inclusive meaning that the word "comprise" and "comprises" will be interpreted as meaning "including, but not limited to", in the singular. In the description of the specification, the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" and the like are intended to indicate that a particular feature, structure, material, or characteristic associated with the embodiment or example is included in at least one embodiment or example of the present disclosure. The schematic representations of the terms used above are not necessarily referring to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be included in any suitable manner in any one or more embodiments or examples.

In the following, the terms "first", "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present disclosure, "a plurality" means two or more unless otherwise specified.

In describing some embodiments, the expressions "coupled" and "connected," along with their derivatives, may be used. For example, the term "connected" may be used in describing some embodiments to indicate that two or more elements are in direct physical or electrical contact with each other. As another example, some embodiments may be described using the term "coupled" to indicate that two or more elements are in direct physical or electrical contact. However, the terms "coupled" or "communicatively coupled" may also mean that two or more elements are not in direct contact with each other, but yet still co-operate or interact with each other. The embodiments disclosed herein are not necessarily limited to the contents herein.

At least one of "A, B and C" has the same meaning as "A, B or at least one of C," both including the following combination of A, B and C: a alone, B alone, C alone, a and B in combination, a and C in combination, B and C in combination, and A, B and C in combination.

"A and/or B" includes the following three combinations: a alone, B alone, and a combination of A and B.

The use of "adapted to" or "configured to" herein means open and inclusive language that does not exclude devices adapted to or configured to perform additional tasks or steps.

As used herein, "about," "approximately," or "approximately" includes the stated values as well as average values that are within an acceptable range of deviation for the particular value, as determined by one of ordinary skill in the art in view of the measurement in question and the error associated with measurement of the particular quantity (i.e., the limitations of the measurement system).

In the optical communication technology, light is used to carry information to be transmitted, and an optical signal carrying the information is transmitted to information processing equipment such as a computer through information transmission equipment such as an optical fiber or an optical waveguide, so as to complete information transmission. Because the optical signal has the passive transmission characteristic when being transmitted through the optical fiber or the optical waveguide, the information transmission with low cost and low loss can be realized. Further, since a signal transmitted by an information transmission device such as an optical fiber or an optical waveguide is an optical signal and a signal that can be recognized and processed by an information processing device such as a computer is an electrical signal, it is necessary to perform interconversion between the electrical signal and the optical signal in order to establish an information connection between the information transmission device such as an optical fiber or an optical waveguide and the information processing device such as a computer. Optical networks are used to implement optical signal transmission, electrical signal and optical signal interconversion.

In order to facilitate that a relatively large number of ONUs are accommodated under one OLT in an optical network, an embodiment of the present application provides an optical network capacity expansion device. Fig. 1 is a schematic diagram of an optical network structure according to some embodiments, and illustrates a usage scenario of an optical network capacity expansion device 100 provided in the embodiment of the present application. As shown in fig. 1, an optical network capacity expansion device 100 provided in this embodiment is used in an upstream network of an optical network, an optical signal receiving end of the optical network capacity expansion device 100 is connected to an Optical Network Unit (ONU) through an optical connector (splitter), and an optical signal transmitting end of the optical network capacity expansion device 100 is connected to an Optical Line Terminal (OLT). The optical network capacity expansion device 100 may be connected to a plurality of splitters, each splitter may be connected to a plurality of ONUs, for example, each splitter is connected to 32 ONUs, and further, it may be realized that one OLT may accommodate more ONUs in the optical network through the optical network capacity expansion device 100, for example, one OLT may accommodate an integral multiple of 32 ONUs.

Fig. 2 is a schematic structural diagram of an optical network capacity expansion device according to some embodiments, and as shown in fig. 2, an optical network capacity expansion device 100 according to an embodiment of the present application includes an optical receiving component 110, a logic circuit 120, a switching circuit 130, and an optical transmitting component 140.

The optical signal input end of the optical receiving component 110 is connected to the splitter, and is configured to receive an optical signal upstream from the ONU and convert the optical signal into an electrical signal. In the embodiment of the present application, the number of the light receiving elements 110 is usually not less than 2, such as 3, 4, etc. For example, as shown in fig. 2, the number of the optical receiving components 110 is 2, an optical signal input end of each optical receiving component 110 is connected to a splitter, and if 32 ONUs are connected to each splitter, 64 ONUs can be accommodated under one OLT. If the optical network capacity expansion device includes the optical receiving component 110, it may be implemented that 128 ONUs are accommodated under one OLT, and the number of ONUs connected under the splitter is not limited to 32. The optical receiving component 110 receives an optical signal which is correspondingly connected with the ONU for uplink transmission through an optical signal input end, and the optical receiving component 110 includes a photoelectric conversion device such as a photodetector, and can convert the received optical signal into an electrical signal. Light receiving component 110 includes, but is not limited to, a 1270 APD ROSA.

The electrical signal output end of the light receiving component 110 is connected to the input end of the switch circuit 130, the output end of the switch circuit 130 is connected to the electrical signal input end of the light emitting component 140, the detection signal output end of the light receiving component 110 is connected to the input end of the logic circuit 120, and the output end of the logic circuit 120 is connected to the control end of the switch circuit 130. When a light signal is received by a light receiving element 110, the detection signal output end of the light receiving element 110 outputs a signal to the logic circuit 120, the logic circuit 120 outputs a corresponding control signal through the output end of the logic circuit 120 according to the received signal, the control end of the switch circuit 130 receives the control signal output by the output end of the logic circuit 120 and switches on the switch circuit 130 according to the received control signal, so that the electrical signal output end of the light receiving element 110 is electrically connected with the electrical signal input end of the light emitting element 140, and further the electrical signal converted by the corresponding light receiving element 110 is transmitted to the light emitting element 140, so that the electrical signal drives the light emitting element 140 to emit a light signal. The optical transmit assembly 140 includes, but is not limited to, a 1270 DFB TOSA.

In the embodiment of the present application, the logic circuit 120 converts the detection signal output by the detection signal output end of the light receiving element 110 into the control signal through logic operation, so as to realize logic identification when the light receiving element 110 receives the optical signal. In some embodiments of the present application, the logic circuit 120 has a number of inputs and a number of outputs, typically the number of inputs is greater than or equal to the number of outputs.

In some embodiments of the present application, the switch circuit 130 includes a control switch, a switch chip, and the like, and can switch the conducting direction according to a received control signal, such as a 4 × 1 switch chip.

In some embodiments of the present application, the logic circuit 120 mainly includes a logic gate and a flip-flop, and the combination of the logic gate and the flip-flop realizes outputting corresponding signals according to different received signals. The logic gate includes an or gate, a nor gate, etc., and the flip-flop includes a D flip-flop, etc.

In some embodiments of the present application, the logic circuit 120 includes a first logic unit and a second logic unit, the first logic unit includes a number of logic gates, and the second logic unit includes a number of D flip-flops. The first logic unit includes a plurality of input ends and a plurality of output ends, and the input ends of the first logic unit are respectively and correspondingly connected to the detection signal output ends of the corresponding light receiving assemblies 110; the output end of the first logic unit is correspondingly connected with the corresponding pin of the corresponding D trigger; the output pin of the D flip-flop is used as the output terminal of the second logic unit, the output pin of the D flip-flop is connected to the control terminal of the switch circuit 130, and the switch circuit 130 controls the conducting direction of the switch circuit 130 according to the signal output by the output pin of the D flip-flop.

In some embodiments of the present application, when the optical receiving component 110 receives an optical signal upstream from the ONU, the optical receiving component 110 generates a detection signal and transmits the detection signal to the logic circuit 120 through the detection signal output terminal. For example, when the optical receiving component 110 receives the ONU upstream optical signal, the generated SD signal is used as the detection signal, and the optical receiving component 110 indicates whether the ONU upstream optical signal is received or not through the SD signal, the optical receiving component 110 sends the SD electrical signal copper lock detection signal output end to the logic circuit 120. For example, when the photodetector in the light receiving element 110 receives the light signal, the SD signal of high level is output, and when the photodetector in the light receiving element 110 does not receive the light signal, the SD signal of low level is output.

Further, in some embodiments, a flip-flop is further disposed between the detection signal output end of the light receiving element 110 and the input end of the logic circuit 120, and the flip-flop outputs a TRI signal according to the received SD signal, so that the logic circuit 120 receives the TRI signal and performs a logic operation on the TRI signal to output a control signal. Illustratively, a detection signal output end of each light receiving element 110 is connected to a flip-flop, and the light receiving element 110 generates a trip signal with a high level of 30ns through a high-level SD signal output by the detection signal output end via the flip-flop, that is, the trip signal is a pulse signal with a duration, and is triggered by the high-level SD signal.

In some embodiments of the present application, the logic circuit 120 outputs a control signal according to the detection signal received and the logic operation, and the control signal is sent to the control terminal of the switch circuit 130 through the output terminal, for example, a rising edge of the TRI signal triggers the logic operation of the logic circuit 120. Illustratively, the logic circuit 120 outputs a control signal, such as a SEL control signal, via a logical operation according to the received TRI signal.

Fig. 3 is a schematic structural diagram of an optical network capacity expansion device according to some embodiments. As shown in fig. 3, the optical network capacity expansion device 100 includes 4 optical receiving components 110, and in order to distinguish the 4 optical receiving components 110, the first optical receiving component, the second optical receiving component, the third optical receiving component, and the fourth optical receiving component are included. The electrical signal output ends of the first light receiving module, the second light receiving module, the third light receiving module and the fourth light receiving module are respectively connected with the switch circuit 130, and the detection signal output ends of the first light receiving module, the second light receiving module, the third light receiving module and the fourth light receiving module are respectively connected with the trigger. The method comprises the following steps: the detection signal output end of the first light receiving component is connected with the first trigger, when the first light receiving component receives the light signal to generate a high-level SD1 signal, the high-level SD1 signal generates a high-level TRI1 signal through the first trigger; the detection signal output end of the second light receiving component is connected with the second trigger, when the second light receiving component receives the light signal to generate a high-level SD2 signal, the high-level SD2 signal generates a high-level TRI2 signal through the second trigger; the detection signal output end of the third light receiving component is connected with the third trigger, when the third light receiving component receives the light signal to generate a high-level SD3 signal, the high-level SD3 signal generates a high-level TRI3 signal through the third trigger; the detection signal output end of the fourth light receiving component is connected with the fourth flip-flop, when the fourth light receiving component receives the light signal to generate a high-level SD4 signal, the high-level SD4 signal generates a high-level TRI4 signal through the fourth flip-flop. The output terminal of the flip-flop is connected to the input terminal of the logic circuit 120, and the output terminal of the logic circuit 120 is connected to the control terminal of the switch circuit 130.

In the specific working process, when the first light receiving assembly, the second light receiving assembly, the third light receiving assembly or the fourth light receiving assembly receives an electrical signal, when the first light receiving assembly, the second light receiving assembly, the third light receiving assembly or the fourth light receiving assembly sends an SD signal to the correspondingly connected trigger through the corresponding detection signal end, the trigger can generate a TRI signal according to the received signal and send the TRI signal to the logic circuit 120, the logic circuit 120 performs logic operation according to the received TRI signal to output two SEL control signals, the switch circuit 130 controls the self-conducting state according to the state of the received two SEL (SEL1 and SEL2) control signals, so that only one light receiving assembly 110 sends the electrical signal to the light emitting assembly 140 at the same time, and the converted electrical signal drives the light emitting assembly 140.

Fig. 4 is a circuit diagram of a logic circuit provided according to some embodiments, where the logic circuit 120 shown in fig. 4 may be used in the optical network capacity expansion device shown in fig. 3. As shown in FIG. 4, the first logic unit 120-A includes a first logic component 120-A1 and a second logic component 120-A2, the first logic component 120-A1 includes a first OR gate 121, a second OR gate 122 and a third OR gate 123, the second logic component 120-A2 includes a fourth OR gate 124, a fifth OR gate 125 and a sixth OR gate 126, and the second logic unit 120-B includes a first D flip-flop 127 and a second D flip-flop 128.

The input end of the first or gate 121 is correspondingly connected to the first flip-flop, the second flip-flop, the third flip-flop and the fourth flip-flop, respectively, and the output end of the first or gate 121 is connected to the CLK pin of the first D flip-flop 127; the input end of the second or gate 122 is correspondingly connected to the first flip-flop and the third flip-flop, respectively, and the output end of the second or gate 122 is connected to the R pin of the first D flip-flop 127; the input end of the third or gate 123 is correspondingly connected to the second flip-flop and the fourth flip-flop, respectively, and the output end of the third or gate 123 is connected to the S pin of the first D flip-flop 127. The input end of the fourth or gate 124 is correspondingly connected to the first flip-flop, the second flip-flop, the third flip-flop and the fourth flip-flop, the output end of the fourth or gate 124 is connected to the CLK pin of the second D flip-flop 128, the input end of the fifth or gate 125 is correspondingly connected to the first flip-flop and the second flip-flop, the output end of the fifth or gate 125 is connected to the R pin of the second D flip-flop 128, the input end of the sixth or gate 126 is correspondingly connected to the third flip-flop and the fourth flip-flop, and the output end of the sixth or gate 126 is connected to the S pin of the second D flip-flop 128. It should be noted that, according to the number of flip-flops to which the first or gate 121, the second or gate 122, the third or gate 123, the fourth or gate 124, the fifth or gate 125, and the sixth or gate 126 are connected, the or gate having a corresponding number of inputs is selected.

In the working process of the optical network capacity expansion equipment: if the first optical receiving element, the second optical receiving element, the third optical receiving element, and the fourth optical receiving element do not receive the optical signal, the first or gate 121 outputs a low level, and the fourth or gate 124 outputs a low level, the output states of the Q pin of the first D flip-flop 127 and the Q pin of the second D flip-flop 128 do not need to be switched; if the first optical receiving element receives an optical signal, the first or gate 121 outputs a high level, the second or gate 122 outputs a high level, the third or gate 123 outputs a low level, the fourth or gate 124 outputs a high level, the fifth or gate 125 outputs a high level, the sixth or gate 126 outputs a low level, the Q pin of the first D flip-flop 127 outputs a low level, and the Q pin of the second D flip-flop 128 outputs a low level; if the second optical receiving element receives an optical signal, the first or gate 121 outputs a high level, the second or gate 122 outputs a low level, the third or gate 123 outputs a high level, the fourth or gate 124 outputs a high level, the fifth or gate 125 outputs a high level, the sixth or gate 126 outputs a low level, the Q pin of the first D flip-flop 127 outputs a high level, and the Q pin of the second D flip-flop 128 outputs a low level; if the third optical receiving element receives an optical signal, the first or gate 121 outputs a high level, the second or gate 122 outputs a high level, the third or gate 123 outputs a low level, the fourth or gate 124 outputs a high level, the fifth or gate 125 outputs a low level, the sixth or gate 126 outputs a high level, the Q pin of the first D flip-flop 127 outputs a low level, and the Q pin of the second D flip-flop 128 outputs a high level; if the fourth optical receiving element receives an optical signal, the first or gate 121 outputs a high level, the second or gate 122 outputs a low level, the third or gate 123 outputs a high level, the fourth or gate 124 outputs a high level, the fifth or gate 125 outputs a low level, the sixth or gate 126 outputs a high level, the Q pin of the first D flip-flop 127 outputs a high level, and the Q pin of the second D flip-flop 128 outputs a high level. The detailed correspondence between the TRI signal state and the SEL state is shown in table 1.

Table 1:

in the embodiment of the present application, only one path of the light receiving component 110 sends the converted electrical signal to the light emitting component 140 at the same time period, so that at a certain time period: if the first optical receiving element receives an optical signal, the switch circuit 130 will output a low level according to the Q pin of the first D flip-flop 127 and the Q pin of the second D flip-flop 128, so that the electrical signal output end of the first optical receiving element is conducted with the electrical signal input end of the optical transmitting element 140; if the second optical receiving element receives an optical signal, the switch circuit 130 outputs a high level according to the Q pin of the first D flip-flop 127 and outputs a low level according to the Q pin of the second D flip-flop 128, so that the electrical signal output end of the second optical receiving element is connected to the electrical signal input end of the optical transmitting element 140; if the third optical receiving element receives an optical signal, the switch circuit 130 outputs a low level according to the Q pin of the first D flip-flop 127 and outputs a high level according to the Q pin of the second D flip-flop 128, so that the electrical signal output end of the third optical receiving element is connected to the electrical signal input end of the optical transmitting element 140; if the fourth optical receiving element receives an optical signal, the switch circuit 130 outputs a high level according to the Q pin of the first D flip-flop 127 and the Q pin of the second D flip-flop 128, so that the electrical signal output terminal of the fourth optical receiving element is connected to the electrical signal input terminal of the optical transmitting element 140. The detailed SEL state corresponds to the selection of the light emitting element drive signal as shown in table 2.

Table 2:

to adapt to the logic circuit 120 shown in fig. 4, it is necessary to ensure that the control signal of the switch circuit 130 corresponds to the on state, and ensure that the electrical signal output terminal of the light receiving module 110 receiving the optical signal at a certain time is connected to the electrical signal input terminal of the light emitting module 140.

Fig. 5 is a circuit diagram of another logic circuit provided according to some embodiments, and the logic circuit 120 shown in fig. 5 may also be used in the optical network capacity expansion device shown in fig. 3. As shown in fig. 5, compared with the structure of the logic circuit shown in fig. 4, the two logic circuits are different only in that the flip-flops respectively connected to the input terminals of the second or gate 122, the third or gate 123, the fifth or gate 125 and the sixth or gate 126 are changed, that is, the state of the flip-flop correspondingly connected to the input terminal of the first logic component 120-a1 and the state of the flip-flop correspondingly connected to the input terminal of the second logic component 120-a2 are changed. As shown in fig. 5, the input terminals of the second or gate 122 are respectively connected to the first flip-flop and the fourth flip-flop, and the output terminal of the second or gate 122 is connected to the R pin of the first D flip-flop 127; the input end of the third or gate 123 is correspondingly connected to the second flip-flop and the third flip-flop, respectively, and the output end of the third or gate 123 is connected to the S pin of the first D flip-flop 127; the input end of the fifth or gate 125 is correspondingly connected to the first flip-flop and the second flip-flop, the output end of the fifth or gate 125 is connected to the R pin of the second D flip-flop 128, the input end of the sixth or gate 126 is correspondingly connected to the third flip-flop and the fourth flip-flop, and the output end of the sixth or gate 126 is connected to the S pin of the second D flip-flop 128. When the connection relationship between the flip-flop and each part in the logic circuit 120 changes, the state of the TRI signal and the corresponding state of the SEL will also change, and the corresponding relationship between the state of the SEL and the selection of the driving signal of the light emitting device will also change, and it is necessary to adjust the corresponding relationship between the control signal of the switch circuit 130 and the conducting state. In the structure of the logic circuit 120 shown in fig. 5, the detailed correspondence relationship between the TRI signal state and the SEL state is shown in table 3, and the detailed correspondence relationship between the SEL state and the selection of the driving signal of the light emitting element is shown in table 4.

Table 3:

table 4:

in the embodiment of the present application, the flip-flops correspondingly connected to the second or gate 122, the third or gate 123, the fifth or gate 125, and the sixth or gate 126 may also change, and further, the relationship between the state of the TRI signal and the corresponding state of the SEL may also change correspondingly.

Fig. 6 is a circuit diagram of another logic circuit provided in accordance with some embodiments, where the logic circuit 120 shown in fig. 6 may be used in an optical network capacity expansion device 100 including three optical receiving components 110, which are denoted as a first optical receiving component, a second optical receiving component, and a third optical receiving component, detection signal output ends of the first optical receiving component, the second optical receiving component, and the third optical receiving component are respectively connected to flip-flops, and the flip-flops are respectively connected to the logic circuit 120 correspondingly. Of course, in the embodiment of the present application, when the optical network capacity expansion device 100 includes three optical receiving assemblies 110, the configuration of the logic circuit 120 and the connection relationship between the logic circuit 120, the switch circuit 130 and the flip-flop are not limited to the configuration shown in fig. 6.

When the connection states of the three light receiving elements 110 and the logic circuit 120 are as shown in fig. 6, and the connection states of the light receiving elements 110 and the logic circuit 120, the correspondence relationship between the TRI signal state and the SEL state is shown in table 5, and the correspondence relationship between the SEL state and the selection of the light emitting element driving signal is shown in table 6.

Table 5:

table 6:

when two optical receiving components 110 are included in the optical network capacity expansion device 100, the logic circuit 120 shown in fig. 4-6 may be simplified as appropriate. When there are more than 4 optical receiving elements 110 in the optical network capacity expansion device 100, the logic circuit 120 and the adjustment switch circuit 130 shown in fig. 4-6 may be added accordingly.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.

Claims (9)

1. An optical network capacity expansion device, comprising:

the light receiving components are used for receiving light signals and outputting electric signals through electric signal output ends of the light receiving components;

a logic circuit, several input ends of which are connected with the detection signal output end of the light receiving component, and the signal received from the detection signal output end outputs a control signal from the output end;

the switch circuit comprises a plurality of input ends, a plurality of control ends and a plurality of switching circuits, wherein the input ends are connected with the electric signal output end of the light receiving component, the control ends are connected with the output end of the logic circuit to receive the control signal output by the output end, and the corresponding input end and output end are conducted according to the control signal received by the control ends;

and the electrical signal input end of the light emitting component is connected with the output end of the switch circuit, and the light emitting component emits light signals according to the received electrical signals.

2. The optical network capacity expansion device according to claim 1, wherein the logic circuit includes a first logic unit and a second logic unit, the first logic unit includes a logic gate, the second logic units each include a D flip-flop, a detection signal output end of the optical receiving component is correspondingly connected to an input end of the logic gate, and an output end of the logic gate is correspondingly connected to a pin of the D flip-flop.

3. The optical network capacity expansion device of claim 2, wherein the optical receiving component comprises a first optical receiving component, a second optical receiving component, a third optical receiving component and a fourth optical receiving component, and the first logic unit comprises a first logic component and a second logic component;

the detection signal output ends of the first light receiving component, the second light receiving component, the third light receiving component and the fourth light receiving component are connected with the input end of the first logic component to form a first connection state, the detection signal output ends of the first light receiving component, the second light receiving component, the third light receiving component and the fourth light receiving component are connected with the input end of the second logic component to form a second connection state, and the first connection state and the second connection state are not completely the same;

the output ends of the first logic assembly and the second logic assembly are correspondingly connected with pins of the second logic unit, and the output end of the second logic unit correspondingly outputs a control signal according to the output signal condition of the detection signal output ends of the first light receiving assembly, the second light receiving assembly, the third light receiving assembly and the fourth light receiving assembly, so that the switch circuit switches on the electric signal output end of the corresponding light receiving assembly and the electric signal input end of the light emitting assembly.

4. The optical network capacity expansion device of claim 3, wherein the first logic component comprises a first or gate, a second or gate and a third or gate, the second logic unit comprises a first D flip-flop, and detection signal outputs of the first optical receiving component, the second optical receiving component, the third optical receiving component and the fourth optical receiving component are connected to inputs of the first or gate, the second or gate and the third or gate in combination;

the output end of the first OR gate is connected with the CLK pin of the first D flip-flop, the output end of the second OR gate is connected with the R pin of the first D flip-flop, and the output end of the third OR gate is connected with the S pin of the first D flip-flop.

5. The optical network capacity expansion device according to claim 3, wherein the second logic component comprises a fourth or gate, a fifth or gate and a sixth or gate, the second logic unit comprises a second D flip-flop, and the detection signal outputs of the first optical receiving component, the second optical receiving component, the third optical receiving component and the fourth optical receiving component are connected to the inputs of the fourth or gate, the fifth or gate and the sixth or gate in combination;

the output end of the fourth or gate is connected with the CLK pin of the second D flip-flop, the output end of the fifth or gate is connected with the R pin of the second D flip-flop, and the output end of the sixth or gate is connected with the S pin of the second D flip-flop.

6. The optical network capacity expansion device of claim 1, wherein a flip-flop is disposed between the detection signal output terminal of the optical receiving component and the logic circuit, an input terminal of the flip-flop is connected to the detection signal output terminal of the optical receiving component, and an output terminal of the flip-flop is connected to an input terminal of the logic circuit.

7. The optical network capacity expansion device of claim 3, wherein the switch circuit comprises a 4 x 1 switch chip, an input terminal of the 4 x 1 switch chip is correspondingly connected to the electrical signal output terminals of the first optical receiving component, the second optical receiving component, the third optical receiving component and the fourth optical receiving component, and an output terminal of the 4 x 1 switch chip is connected to the electrical signal input terminal of the optical transmitting component;

and the first output end and the second output end of the second logic unit are correspondingly connected with the first control end and the second control end of the 4 multiplied by 1 switch chip.

8. The optical network capacity expansion device of claim 4, wherein the input end of the first or gate is correspondingly connected to the first optical receiving component, the second optical receiving component, the third optical receiving component and the fourth optical receiving component through a first trigger, a second trigger, a third trigger and a fourth trigger; the input end of the second OR gate is correspondingly connected with the first light receiving component and the third light receiving component through the first trigger and the third trigger; and the input end of the third OR gate is correspondingly connected with the second light receiving component and the fourth light receiving component through the second trigger and the fourth trigger.

9. The optical network capacity expansion device of claim 5, wherein an input end of the fourth or gate is correspondingly connected to the first optical receiving component, the second optical receiving component, the third optical receiving component and the fourth optical receiving component through a first trigger, a second trigger, a third trigger and a fourth trigger; the input end of the fifth OR gate is correspondingly connected with the first light receiving component and the second light receiving component through the first trigger and the second trigger; and the input end of the sixth OR gate is correspondingly connected with the third light receiving component and the fourth light receiving component through the third trigger and the fourth trigger.

Images