CN120582704A - Optical module - Google Patents
Optical moduleInfo
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- CN120582704A CN120582704A CN202510861185.3A CN202510861185A CN120582704A CN 120582704 A CN120582704 A CN 120582704A CN 202510861185 A CN202510861185 A CN 202510861185A CN 120582704 A CN120582704 A CN 120582704A
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Abstract
本申请涉及一种光模块，涉及光通信技术领域。本申请提高光信号传输距离。光模块中，电信号处理单元用于接入多路第一电信号，通过直调组件将多路第一电信号调制到直调组件提供的多路第一光信号上；每路第一光信号的中心波长为不同的预设波长，多路第一光信号的中心波长按照预设间隔排布；复用器用于将多路第一光信号合并为输出光信号，通过第一空芯光纤输出输出光信号；解复用器用于通过第二空芯光纤接入输入光信号，将输入光信号分离为多路第二光信号；每路第二光信号的中心波长为不同的预设波长，多路第二光信号的中心波长按照预设间隔排布；直检组件，用于分别检测多路第二光信号得到多路第二电信号，通过电信号处理单元输出多路第二电信号。
The present application relates to an optical module and to the field of optical communication technology. The present application improves the transmission distance of optical signals. In the optical module, an electrical signal processing unit is used to access multiple first electrical signals, and modulate the multiple first electrical signals to multiple first optical signals provided by the direct modulation component through a direct modulation component; the center wavelength of each first optical signal is a different preset wavelength, and the center wavelengths of the multiple first optical signals are arranged according to preset intervals; a multiplexer is used to merge the multiple first optical signals into an output optical signal, and output the output optical signal through a first hollow-core optical fiber; a demultiplexer is used to access an input optical signal through a second hollow-core optical fiber, and separate the input optical signal into multiple second optical signals; the center wavelength of each second optical signal is a different preset wavelength, and the center wavelengths of the multiple second optical signals are arranged according to preset intervals; a direct detection component is used to respectively detect the multiple second optical signals to obtain multiple second electrical signals, and output the multiple second electrical signals through the electrical signal processing unit.
Description
Technical Field
The application relates to the technical field of optical communication, in particular to an optical module.
Background
With the rapid development of artificial intelligence (ARTIFICIAL INTELLIGENCE, AI) technology, the calculation power scale grows exponentially, and large model training has become a core driving force for the development of intelligent computing centers, which puts forward higher development requirements on data processing and computing, network scale, time delay, energy consumption and the like.
Inside an intelligent computation center, network levels are often networked according to three-layer architecture of TOR-LEAF-SPINE (top-of-rack switch-LEAF-SPINE switch), different levels or the same levels are connected through optical fibers, and two ends of each optical fiber can transmit data traffic through an optical module.
As the optical module rate continues to increase, the bandwidth of the optoelectronic chip and device further increases.
Based on the traditional optical module, 30 to 40km (kilometer) can be transmitted in the scenes of 100G (gigabit) and 400G, and the transmission of 10km is barely supported by 800G, but the optical signal transmission capability is limited in the scene of 1.6T (terabit), and the stable transmission of a medium short transmission distance such as 10km can not be maintained.
Disclosure of Invention
In view of the above, it is necessary to provide an optical module.
In one embodiment, the application provides an optical module, which comprises an electric signal processing unit, a direct modulation component, a direct detection component, a multiplexer, a demultiplexer, a first hollow optical fiber and a second hollow optical fiber, wherein,
The electric signal processing unit is used for accessing multiple paths of first electric signals, and modulating the multiple paths of first electric signals onto multiple paths of first optical signals provided by the direct modulation assembly through the direct modulation assembly, wherein the central wavelength of each path of first optical signals is different preset wavelengths, and the central wavelengths of the multiple paths of first optical signals are distributed according to preset intervals;
The multiplexer is configured to combine the multiple first optical signals into an output optical signal, and output the output optical signal through the first hollow fiber;
The demultiplexer is used for accessing an input optical signal through the second hollow optical fiber and separating the input optical signal into multiple paths of second optical signals, wherein the center wavelength of each path of second optical signal is different preset wavelengths, and the center wavelengths of the multiple paths of second optical signals are distributed according to preset intervals;
the direct detection assembly is used for respectively detecting the plurality of paths of second optical signals to obtain a plurality of paths of second electric signals, and the electric signal processing unit outputs the plurality of paths of second electric signals.
In one embodiment, the system further comprises a micro control unit, wherein the laser in the direct modulation component is provided with a temperature sensor, and the micro control unit is used for monitoring the actual temperature of the laser through the temperature sensor and adjusting the control current of the laser according to the actual temperature so as to enable the central wavelength of the multiple paths of first optical signals to be a preset wavelength.
In one embodiment, the micro control unit is further configured to adjust the control current of the laser according to the actual temperature and a preset parameter table, so as to restore the actual temperature of the laser to a target temperature, where the center wavelength of the multiple first optical signals output by the laser at the target temperature is a preset wavelength, and the preset parameter table is used to indicate the control current for restoring the actual temperature of the laser to the target temperature at various actual temperatures.
In one embodiment, the multiplexer is a filter cascade multiplexer, and the demultiplexer is a filter cascade demultiplexer.
In one embodiment, the filter cascade multiplexer is used for cascading the multiple first optical signals according to a first center wavelength sequence, and the filter cascade demultiplexer is used for cascading the multiple second optical signals according to a second center wavelength sequence, wherein the first center wavelength sequence is opposite to the second center wavelength sequence.
In one embodiment, the output end of the multiplexer is coupled with the first hollow fiber inside the optical module through a first single mode fiber, and the input end of the demultiplexer is coupled with the second hollow fiber inside the optical module through a second single mode fiber.
In one embodiment, the first single-mode optical fiber and the first hollow-core optical fiber are coupled in a hot-melting or cold-joining mode, and the second single-mode optical fiber and the second hollow-core optical fiber are coupled in a hot-melting or cold-joining mode.
In one embodiment, the first hollow fiber is further used for coupling with a third hollow fiber, the second hollow fiber is further used for coupling with a fourth hollow fiber, and the third hollow fiber and the fourth hollow fiber belong to hollow fibers of a hollow fiber link.
In one embodiment, the first hollow fiber is further used for being welded with the third hollow fiber, the second hollow fiber is further used for being welded with the fourth hollow fiber, the third hollow fiber is further used for being welded with a fifth hollow fiber, the fourth hollow fiber is further used for being welded with a sixth hollow fiber, the fifth hollow fiber is a hollow fiber of another optical module for inputting optical signals, and the sixth hollow fiber is a hollow fiber of the other optical module for outputting optical signals.
In one embodiment, the preset wavelength comprises 1271nm, 1281nm, 1291nm, 1301nm, 1311nm, 1321nm, 1331nm, 1341nm, or comprises 1273.54nm, 1277.89nm, 1282.26nm, 1286.66nm, 1295.56nm, 1300.05nm, 1304.58nm, 1309.14nm.
The optical module comprises an optical module, an electric signal processing unit, a multiplexer, a demultiplexer, a direct detection assembly and an electric signal processing unit, wherein the optical module is used for connecting multiple paths of first electric signals, the multiple paths of first electric signals are modulated onto multiple paths of first optical signals provided by the direct modulation assembly through the direct modulation assembly, the center wavelength of each path of first optical signals is different preset wavelengths, the center wavelengths of the multiple paths of first optical signals are distributed according to preset intervals, the multiplexer is used for combining the multiple paths of first optical signals into output optical signals and outputting the output optical signals through a first hollow optical fiber, the demultiplexer is used for connecting the input optical signals through a second hollow optical fiber and separating the input optical signals into multiple paths of second optical signals, the center wavelength of each path of second optical signals is different preset wavelengths, the center wavelengths of the multiple paths of second optical signals are distributed according to the preset intervals, and the direct detection assembly is used for respectively detecting the multiple paths of second optical signals to obtain the multiple paths of second electric signals and outputting the multiple paths of second electric signals through the electric signal processing unit. The scheme can realize the processing of multichannel optical signals in the optical module by adopting a direct alignment detection mode, and can support the medium-short distance communication of the optical signals by combining the hollow optical fiber, so that the problem of limited transmission capacity of the optical module in the traditional technology is solved, the optical signal transmission distance is increased, the requirement of stable transmission of the medium-short distance optical signals such as 10km in a 1.6T scene can be met, and the network construction cost can be reduced compared with a coherent optical module.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the related art, the drawings that are needed in the description of the embodiments of the present application or the related technologies will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other related drawings may be obtained according to these drawings without inventive effort to those of ordinary skill in the art.
FIG. 1 is a schematic diagram of an optical module in one embodiment;
FIG. 2 is a schematic diagram of a chip array in one embodiment;
FIG. 3 (a) is a schematic diagram of a multiplexer in one embodiment;
FIG. 3 (b) is a schematic diagram of a demultiplexer in one embodiment;
FIG. 4 is a schematic illustration of fiber optic connections in one embodiment;
Fig. 5 is a schematic diagram of paired light modules in one embodiment.
Detailed Description
The present application will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.
It should be noted that the terms "first," "second," and the like, as used herein, may be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from a second element. The terms "comprising" and "having," as well as any variations thereof, as used herein, are intended to cover a non-exclusive inclusion. The term "plurality" as used herein refers to two and more than two. The term "and/or" as used herein refers to one of, or any combination of, the various schemes therein.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
Related terms related to the present application:
DFB (Distributed Feedback Laser), distributed feedback lasers.
DSP (DIGITAL SIGNAL Processor), digital signal Processor.
TIA (Transimpedance Amplifier), transimpedance amplifier.
LA (Limiting Amplifier), limiting amplifiers.
MCU (Micro Controller Unit), a microcontrol unit.
WDM (Wavelength Division Multiplexing), wavelength division multiplexing.
TEC (Thermoelectric cooler), semiconductor refrigerator.
As the optical module rate continues to increase, the bandwidth of the optoelectronic chip and device further increases. Based on the traditional optical module, 30 to 40km (kilometer) can be transmitted in the scenes of 100G (gigabit) and 400G, and the transmission of 10km is barely supported by 800G, but the optical signal transmission capability is limited in the scene of 1.6T (terabit), and the stable transmission of a medium short transmission distance such as 10km can not be maintained. For example, in a 1.6T scenario, in order for an optical module to still maintain stable transmission for 10km, it is necessary to solve the transmission link problems such as chromatic dispersion and nonlinearity. The hollow fiber has the characteristics of low loss, low time delay, low nonlinearity, low back scattering and the like, so that the energy loss of light propagating under the medium is reduced, and the transmission speed and the transmission distance are improved. At present, the research and practice of the hollow fiber mainly focuses on the C band, and the carrier can be helped to explore and improve the medium-long distance transmission performance and capacity between the metropolitan area machine room and the data center by combining the wavelength division multiplexing technology adopting a coherent scheme. With the continuous optimization of the structural design of the hollow fiber, the working bandwidth can cover the expansion bands of O, E, S, L, U and the like, wherein the O-band hollow fiber can be used for special scenes such as short-distance interconnection in an intelligent computation center.
The optical module can realize the processing of multichannel optical signals in the optical module in a direct alignment detection mode, and can support the medium-short distance communication of the optical signals by combining the hollow optical fiber, so that the problem of limited transmission capacity of the optical module in the traditional technology is solved, the transmission distance of the optical signals is improved, the requirement of stable transmission of the medium-short distance optical signals such as 10km in a 1.6T scene can be met, and compared with a coherent optical module, the network construction cost can be reduced.
In one exemplary embodiment, as shown in FIG. 1, an optical module is provided that may include an electrical signal processing unit, a direct modulation assembly, a direct detection assembly, a multiplexer, a demultiplexer, a first hollow fiber, a second hollow fiber.
In this embodiment, the direct modulation component may be a component that directly modulates a light source (such as a laser, a laser array unit, etc.) in the optical module to make the intensity of the optical signal change with the electrical signal, without an additional external modulator. The direct detection component can be an optical signal receiving component adopting a direct detection mode in the optical module, and can convert an optical signal into an electric signal through elements such as a photoelectric detector, and the like, so that coherent frequency mixing of the optical signal and local oscillation light is not required.
As an example, as shown in fig. 1, the direct modulation assembly may include a driver array unit, a modulation array unit, and a laser array unit. The laser array unit is used as an emission source of the optical signal and generates stable laser beams. The modulation array unit may be used for intensity modulating an optical signal emitted by the laser array unit, and converting an electrical signal into an optical signal. The driver array unit may be used to provide high-speed electrical signal driving for the modulation array unit, amplify and shape the input electrical signal. The driver array unit can amplify, reshape and the like the multiple first electric signals accessed by the electric signal processing unit and then provide the amplified, reshaped and the like multiple first electric signals to the modulation array unit, and the modulation array unit converts the multiple first electric signals into optical signals. Among them, DFB lasers of group iii-v materials may be used for the laser array unit, which may employ a technique of coarse wavelength division multiplexing (CWDM, coarse Wavelength Division Multiplexing) or fine wavelength division multiplexing (LWDM, lean Wavelength Division Multiplexing). In some embodiments, the electrical signal processing unit may further have a function of a driver, so that the electrical signal processing unit may directly provide the multiple first electrical signals to the modulation array unit, and the modulation array unit converts the multiple first electrical signals into optical signals. As an example, the electrical signal processing unit may employ a digital signal Processor (DIGITAL SIGNAL Processor, DSP). The electric signal processing unit can perform pre-emphasis, equalization and the like on the electric signal so as to keep the integrity of the electric signal.
As an example, as shown in fig. 1, the direct test assembly may include a PIN array unit and a TIA/LA array unit. The PIN array unit may include a plurality of PIN photodiodes (photo diodes), and each PIN tube may correspond to one path of second optical signal input. The TIA/LA array unit may include a TIA array unit and a LA array unit. The TIA array unit may be configured to convert a weak photocurrent (e.g., μa level) output from the PIN photodiode into a voltage signal (e.g., mV level), and perform low noise amplification. The LA array unit can be used for further amplifying the voltage signals output by the TIA array unit to logic level, eliminating signal amplitude fluctuation through amplitude limiting and enhancing noise immunity.
As an embodiment, the driver array unit, the modulation array unit, the PIN array unit, and the TIA/LA array unit may be array units in the form of chips, and may be designed in the form of an array, that is, a single chip may be provided with a plurality of input/output interfaces, and is responsible for sending and receiving multiple electrical signals and optical signals at the same time, so as to ensure miniaturized packaging of the optical module, as shown in fig. 2, the array units may be chips of 4 in1 or chips of 8 in 1. Here, lane represents signals (optical signals or electrical signals) of each path, and 8 paths of optical signals or electrical signals are schematically shown in the figure.
In some embodiments, a micro control unit (Microcontroller Unit, MCU) and a power supply may also be included in the light module. The micro control unit can be connected with each part (an electric signal processing unit, a direct adjustment component, a direct detection component and the like) in the optical module, can be used for monitoring and controlling the performance of the optical module, and can be connected with external equipment through an inter-integrated circuit bus IIC. Wherein a power supply may be used to power the light module.
In this embodiment, the electrical signal processing unit is configured to access multiple first electrical signals, and modulate the multiple first electrical signals to multiple first optical signals provided by the direct modulation component through the direct modulation component. The central wavelengths (such as lambda 1 to lambda 8) of each path of first optical signals are different preset wavelengths, and the central wavelengths of the paths of first optical signals are distributed according to preset intervals. The laser array unit in the direct modulation component can adopt the CWDM or LWDM technology. In some embodiments, the center wavelengths of the multiple first optical signals may be arranged at intervals of 10nm (nanometers) using CWDM technology, and the center wavelengths of the multiple first optical signals may be arranged at intervals of 800GHz using LWDM technology. In the conventional technology, when adopting the technology of CWDM, the interval is generally 20nm, but considering the bandwidth of 160nm of 8 channels, the E band is covered, which is unfavorable for the realization of hollow fiber, so that the arrangement according to the interval of 10nm is proposed. Thus, in one embodiment, the predetermined wavelength may include 1271nm, 1281nm, 1291nm, 1301nm, 1311nm, 1321nm, 1331nm, 1341nm. As another example, the predetermined wavelength may include 1273.54nm, 1277.89nm, 1282.26nm, 1286.66nm, 1295.56nm, 1300.05nm, 1304.58nm, 1309.14nm.
For this, taking 8 optical signals as an example, the center wavelengths in two cases are shown in table 1 below:
TABLE 1
| CWDM center wavelength | Center wavelength LWDM | |
| Lane1 | 1271nm | 1273.54nm |
| Lane2 | 1281nm | 1277.89nm |
| Lane3 | 1291nm | 1282.26nm |
| Lane4 | 1301nm | 1286.66nm |
| Lane5 | 1311nm | 1295.56nm |
| Lane6 | 1321nm | 1300.05nm |
| Lane7 | 1331nm | 1304.58nm |
| Lane8 | 1341nm | 1309.14nm |
Therefore, the electric/optical signals can be respectively 8 paths of 200G signals, and the 1.6T direct alignment light detection module is realized.
In this embodiment, the multiplexer is configured to combine the multiple first optical signals into an output optical signal, and output the output optical signal through the first hollow fiber. The multiplexer is used at the transmitting end of the optical signal of the optical module to realize the wavelength division multiplexing function of the branch-side multipath wavelength signals, so that each path of first optical signals modulated with the first electric signals are combined into one path of output optical signals, and the output optical signals are output through the first hollow fiber.
In this embodiment, the demultiplexer is configured to access an input optical signal through the second hollow fiber, and separate the input optical signal into multiple second optical signals. The central wavelength of each path of second optical signals is different preset wavelengths, and the central wavelengths of the plurality of paths of second optical signals are distributed according to preset intervals. The receiving end of the optical signal of the optical module uses a demultiplexer to realize the demultiplexing function of the branch-side multipath wavelength signals. For the preset wavelength and the preset interval, corresponding to the first optical signals, the central wavelengths of the multiple paths of second optical signals can be distributed at intervals of 10nm, and the central wavelengths of the multiple paths of second optical signals can also be distributed at intervals of 800 GHz.
In this embodiment, the direct detection component is configured to detect multiple paths of second optical signals respectively to obtain multiple paths of second electrical signals, and output the multiple paths of second electrical signals through the electrical signal processing unit.
In this embodiment, the optical signal transmission may be performed through the hollow fiber, unlike a single-mode fiber, where when the optical signal is transmitted in the single-mode fiber, the problems such as loss, link dispersion, nonlinear effect are significant, and the wavelength division multiplexing technology of the direct alignment detection is difficult to use, and it is necessary to use a coherent technology to ensure accuracy of data transmission. By means of the characteristics of low loss, low time delay, low nonlinearity and the like of the hollow fiber, the embodiment can realize the optical module for direct alignment and direct detection, can greatly reduce the networking cost, and the nonlinearity problems of four-wave mixing and the like of the wavelength division multiplexing technology cannot exist in a signal transmission system of the optical module, so that the light-emitting power of the optical module can be improved, the power budget of a link is improved, and the transmission distance is prolonged.
In the optical module of the embodiment, an electric signal processing unit is used for accessing multiple paths of first electric signals, the multiple paths of first electric signals are modulated onto multiple paths of first optical signals provided by a direct modulation component through the direct modulation component, the center wavelength of each path of first optical signals is different preset wavelengths, the center wavelengths of the multiple paths of first optical signals are distributed according to preset intervals, a multiplexer is used for combining the multiple paths of first optical signals into output optical signals and outputting the output optical signals through a first hollow optical fiber, a demultiplexer is used for accessing an input optical signal through a second hollow optical fiber and separating the input optical signal into multiple paths of second optical signals, the center wavelength of each path of second optical signals is different preset wavelengths, the center wavelengths of the multiple paths of second optical signals are distributed according to preset intervals, and a direct detection component is used for respectively detecting the multiple paths of second optical signals to obtain the multiple paths of second electric signals and outputting the multiple paths of second electric signals through the electric signal processing unit. The scheme can realize the processing of multichannel optical signals in the optical module by adopting a direct alignment detection mode, and can support the medium-short distance communication of the optical signals by combining the hollow optical fiber, so that the problem of limited transmission capacity of the optical module in the traditional technology is solved, the optical signal transmission distance is increased, the requirement of stable transmission of the medium-short distance optical signals such as 10km in a 1.6T scene can be met, and the network construction cost can be reduced compared with a coherent optical module.
In an exemplary embodiment, the optical module further comprises a micro-control unit, wherein the laser in the direct-tuning component is provided with a temperature sensor, and the micro-control unit is used for monitoring the actual temperature of the laser through the temperature sensor and adjusting the control current of the laser according to the actual temperature so as to enable the center wavelength of the multiple paths of first optical signals to be a preset wavelength.
In this embodiment, the micro control unit may monitor the actual temperature of the laser through a temperature sensor disposed in the laser (laser array unit), so as to adjust the control current of the laser according to the actual temperature, where the control current may be bias current or modulation current, so that the center wavelength of the multiple first optical signals provided by the laser is a preset wavelength, and stability of optical signal modulation processing is improved. Whether the technology is CWDM or LWDM, the TEC is generally required to be added on the laser to ensure the wavelength stability at different working temperatures, but the use of the TEC can increase the design complexity and the power consumption of the optical module, and the scheme of the embodiment can improve the stability of the modulation processing of the optical signal on the basis of reducing the design complexity and the power consumption of the optical module.
In an exemplary embodiment, the micro control unit is further configured to adjust the control current of the laser according to the actual temperature and the preset parameter table, so as to restore the actual temperature of the laser to the target temperature.
In this embodiment, the center wavelength of the multiple first optical signals output by the laser at the target temperature is a preset wavelength. A preset parameter table for indicating a control current for restoring the actual temperature of the laser to a target temperature at various actual temperatures. The preset parameter table may be written to the micro control unit when the light module leaves the factory. When the actual temperature of the laser changes due to the ambient temperature or the intrinsic change of the laser, the micro control unit can acquire the control current (bias current or modulation current) of the laser to be adjusted through the written preset parameter table, so that the actual temperature of the laser is reduced to the target temperature, and the reduction of the center wavelength of the laser is further realized.
In an exemplary embodiment, the multiplexer employs a filter cascade of multiplexers and the demultiplexer employs a filter cascade of demultiplexers. In this embodiment, the multiplexer may use a multiplexer of a thin film filter cascade, and the demultiplexer may also use a demultiplexer of a thin film filter cascade, so as to implement multiplexing and demultiplexing functions of 8 optical signals, for example. The scheme of the embodiment is suitable for the optical communication system of wavelength division multiplexing with higher requirements on transmission capacity and signal quality.
In an exemplary embodiment, further, as shown in fig. 3 (a) and 3 (b), a filter cascade multiplexer for cascading the plurality of first optical signals in a first center wavelength order, and a filter cascade demultiplexer for cascading the plurality of second optical signals in a second center wavelength order.
In this embodiment, the first center wavelength order is opposite to the second center wavelength order. In the case of multiplexing and demultiplexing the optical signals by using the filter cascade method, since the filter cascade can make the insertion loss of each optical signal inconsistent, in order to keep the loss of the overall link optimal, in the scheme of this embodiment, each optical signal is cascaded according to a specific sequence, where in the multiplexer, the first optical signals are cascaded according to a first center wavelength sequence, in the demultiplexer, the second optical signals are cascaded according to an opposite second center wavelength sequence, for example, in the multiplexer, 8 first optical signals are cascaded according to a sequence from lane 1 to lane 8 (from small to large wavelength), and in the multiplexer, 8 second optical signals are cascaded according to a sequence from lane 8 to lane 1.
In one exemplary embodiment, the output of the multiplexer is coupled to the first hollow fiber inside the optical module via a first single mode fiber and the input of the demultiplexer is coupled to the second hollow fiber inside the optical module via a second single mode fiber.
In this embodiment, with reference to fig. 1 and fig. 4, the output end of the multiplexer may be coupled to the first hollow fiber through a first single mode fiber, and may be coupled inside the optical module. The output end of the demultiplexer may be coupled to a second hollow fiber through a second single mode fiber, and may be coupled inside an optical module. Thereby, the coupling portion is prevented from being exposed to the outside of the optical module to interfere with the optical signal transmission. As an example, the first hollow core optical fiber and the second hollow core optical fiber may operate in the O-band. Therefore, the optical module can adopt a wavelength division multiplexing structure, and the input and output optical ports can adopt hollow fiber jumpers, so that the hollow fiber working in an O band can be combined to support medium-short distance communication, and the optical module can be applied to special scenes such as short distance interconnection in an intelligent computation center.
In an exemplary embodiment, further, the first single mode fiber is coupled to the first hollow core fiber by hot-melting or cold-splicing, and the second single mode fiber is coupled to the second hollow core fiber by hot-melting or cold-splicing.
In this embodiment, the first single-mode optical fiber and the first hollow-core optical fiber may be coupled inside the optical module by adopting a hot-melting or cold-joining manner, and the second single-mode optical fiber and the second hollow-core optical fiber may be coupled inside the optical module by adopting a hot-melting or cold-joining manner. Thereby, it is possible to prevent moisture and dust from entering the coupling portion and to prevent the coupling portion from being exposed to the outside of the optical module to interfere with the optical signal transmission.
In one exemplary embodiment, the first hollow core fiber is also used for coupling with a third hollow core fiber, and the second hollow core fiber is also used for coupling with a fourth hollow core fiber.
In this embodiment, the first hollow fiber is further configured to couple with the third hollow fiber, that is, one end of the first hollow fiber may be coupled with the first single mode fiber, and the other end may be coupled with the third hollow fiber. Wherein the first hollow fiber may be coupled with the third hollow fiber through the first hollow connector. The second hollow fiber is further used for coupling with the fourth hollow fiber, namely one end of the second hollow fiber can be coupled with the second single mode fiber, and the other end of the second hollow fiber can be coupled with the fourth hollow fiber. Wherein the second hollow fiber may be coupled to the fourth hollow fiber by a second hollow connector. Wherein the third hollow fiber and the fourth hollow fiber belong to the hollow fiber of the hollow fiber link. Therefore, the optical module can be conveniently connected to the hollow fiber link through the first hollow fiber and the second hollow fiber, namely the corresponding hollow connectors, so that the optical signal can be transmitted in the hollow fiber link.
In one exemplary embodiment, the first hollow fiber is further used for welding with a third hollow fiber, the second hollow fiber is further used for welding with a fourth hollow fiber, wherein the third hollow fiber is further used for welding with a fifth hollow fiber, and the fourth hollow fiber is further used for welding with a sixth hollow fiber.
In this embodiment, as shown in fig. 5, the optical module may be connected to another optical module through a hollow fiber. The two optical modules may be optical modules with the same structure, may be 1.6T optical modules, may be used in pairs, and may be inserted into corresponding device ports for use. The fifth hollow fiber is a hollow fiber of another optical module for inputting optical signals, and the sixth hollow fiber is a hollow fiber of another optical module for outputting optical signals. In this embodiment, the first hollow fiber is fused with the third hollow fiber, the third hollow fiber is fused with the fifth hollow fiber, the second hollow fiber is fused with the fourth hollow fiber, and the fourth hollow fiber is fused with the sixth hollow fiber, so that the two optical modules are used in pairs, and the reliability of optical signal transmission in the hollow fibers can be increased.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the present application.
The foregoing examples illustrate only a few embodiments of the application and are described in detail herein without thereby limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of the application should be assessed as that of the appended claims.
Claims (10)
1. The optical module is characterized by comprising an electric signal processing unit, a direct modulation component, a direct detection component, a multiplexer, a demultiplexer, a first hollow optical fiber and a second hollow optical fiber, wherein,
The electric signal processing unit is used for accessing multiple paths of first electric signals, and modulating the multiple paths of first electric signals onto multiple paths of first optical signals provided by the direct modulation assembly through the direct modulation assembly, wherein the central wavelength of each path of first optical signals is different preset wavelengths, and the central wavelengths of the multiple paths of first optical signals are distributed according to preset intervals;
The multiplexer is configured to combine the multiple first optical signals into an output optical signal, and output the output optical signal through the first hollow fiber;
The demultiplexer is used for accessing an input optical signal through the second hollow optical fiber and separating the input optical signal into multiple paths of second optical signals, wherein the center wavelength of each path of second optical signal is different preset wavelengths, and the center wavelengths of the multiple paths of second optical signals are distributed according to preset intervals;
the direct detection assembly is used for respectively detecting the plurality of paths of second optical signals to obtain a plurality of paths of second electric signals, and the electric signal processing unit outputs the plurality of paths of second electric signals.
2. The optical module of claim 1, further comprising a micro control unit, wherein the laser in the direct modulation assembly is provided with a temperature sensor, wherein,
And the micro control unit is used for monitoring the actual temperature of the laser through the temperature sensor and adjusting the control current of the laser according to the actual temperature so as to enable the central wavelength of the multipath first optical signals to be a preset wavelength.
3. The optical module according to claim 2, wherein the micro control unit is further configured to adjust a control current of the laser according to the actual temperature and a preset parameter table so as to restore the actual temperature of the laser to a target temperature, wherein a center wavelength of the multiple first optical signals output by the laser at the target temperature is a preset wavelength, and wherein the preset parameter table is configured to indicate the control current for restoring the actual temperature of the laser to the target temperature at various actual temperatures.
4. The optical module of claim 1, wherein the multiplexer is a filter cascade multiplexer and the demultiplexer is a filter cascade demultiplexer.
5. The optical module of claim 4, wherein the optical module comprises,
The multiplexer is used for cascading the plurality of paths of first optical signals according to a first center wavelength sequence;
the demultiplexer of the filter cascade is used for cascading the plurality of paths of second optical signals according to a second center wavelength sequence;
Wherein the first center wavelength order is opposite to the second center wavelength order.
6. The optical module of claim 1, wherein an output of the multiplexer is coupled to the first hollow fiber inside the optical module via a first single mode fiber and an input of the demultiplexer is coupled to the second hollow fiber inside the optical module via a second single mode fiber.
7. The optical module of claim 6, wherein the first single mode fiber is coupled to the first hollow fiber by hot melt or cold splice, and wherein the second single mode fiber is coupled to the second hollow fiber by hot melt or cold splice.
8. The optical module of claim 1, wherein the first hollow fiber is further configured to couple with a third hollow fiber, wherein the second hollow fiber is further configured to couple with a fourth hollow fiber, and wherein the third hollow fiber and the fourth hollow fiber belong to a hollow fiber of a hollow fiber link.
9. The optical module of claim 8, wherein the first hollow fiber is further configured to be fused to the third hollow fiber, the second hollow fiber is further configured to be fused to the fourth hollow fiber, wherein the third hollow fiber is further configured to be fused to a fifth hollow fiber, wherein the fourth hollow fiber is further configured to be fused to a sixth hollow fiber, wherein the fifth hollow fiber is a hollow fiber of another optical module for inputting an optical signal, and wherein the sixth hollow fiber is a hollow fiber of the other optical module for outputting an optical signal.
10. The light module of any one of claims 1 to 9, wherein the predetermined wavelength comprises 1271nm, 1281nm, 1291nm, 1301nm, 1311nm, 1321nm, 1331nm, 1341nm, or comprises 1273.54nm, 1277.89nm, 1282.26nm, 1286.66nm, 1295.56nm, 1300.05nm, 1304.58nm, 1309.14nm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202510861185.3A CN120582704A (en) | 2025-06-25 | 2025-06-25 | Optical module |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202510861185.3A CN120582704A (en) | 2025-06-25 | 2025-06-25 | Optical module |
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