CN104238040A - Optical fiber coupling connector - Google Patents

Abstract

The invention relates to an optical fiber coupling connector which comprises a circuit board, light receiving modules, light transmitting modules, an optical coupling part, an optical fiber containing part and a plurality of optical fibers. The light receiving modules and the light transmitting modules are fixedly arranged on the circuit board at intervals. The optical coupling part comprises a coupling body and a plurality of convergent lenses. The coupling body comprises a first optical surface, a second optical surface and reflecting surfaces, the first optical surface is perpendicular to the second optical surface, and the reflecting surfaces are inclined relative to the first optical surface and the second optical surface. The convergent lenses are formed on the first optical surface. The coupling body is located on the circuit board and the convergent lenses are aligned to the light receiving modules and the light transmitting modules. The optical fiber containing part comprises a front end, a rear end and through holes, the rear end is back onto the front end, and the through holes penetrate through the front end and the rear end and correspond to the optical fibers. The optical fiber containing part is inserted into the optical coupling part, and the front end of the optical fiber containing part is opposite to the second optical surface. Each optical fiber comprises an optical fiber body and an optical lens located on the end face of one end of the optical fiber body. The optical fibers are contained in the corresponding through holes, and the optical lenses stretch out of the corresponding through holes and correspond to the convergent lenses in a one-to-one mode.

Description

Fiber Coupler

technical field

The invention relates to the field of optical transmission, in particular to an optical fiber coupling connector.

Background technique

At present, the use of optical signals to transmit data is gradually applied to the field of personal computers, and the specific form is embodied in the use of optical fiber coupling connectors. Generally, a fiber coupling connector includes an optical coupling part, an optical fiber receiving part provided with a blind hole and inserted into the optical coupling part, an optical fiber installed in the blind hole, and a light emitting surface installed in the optical fiber receiving part. A converging lens on and aligned with the fiber. When in use, if the optical fiber coupling connector is used as an optical signal receiving end, the light entering the optical fiber passes through the body part of the optical fiber receiving part between the blind hole and the light-emitting surface, reaches the converging lens, and then exits from the converging lens to Enter the optical coupling part; if the optical fiber coupling connector is used as the optical signal transmitting end, the light from the optical coupling part enters from the converging lens, passes through the body part between the blind hole and the light-emitting surface, and finally reaches the optical fiber exit the fiber. However, no matter whether the optical fiber coupling connector is used as the transmitting end of the optical signal or as the receiving end of the optical signal, during the light transmission process, the light will pass through the body part between the blind hole and the light-emitting surface, thereby increasing the light The refraction interface, and multi-interface refraction will inevitably increase the loss of light during transmission, thereby reducing the transmission efficiency of optical signals.

Contents of the invention

In view of this, it is necessary to provide an optical fiber coupling connector, which can reduce the loss of light during transmission to ensure the transmission efficiency of optical signals.

An optical fiber coupling connector includes a circuit board, a light emitting module, a light receiving module, an optical coupling part, an optical fiber receiving part and a plurality of optical fibers. The light-emitting module and the light-receiving module are fixed on the circuit board at intervals. The optical coupling part includes a coupling body and a plurality of converging lenses. The coupling body includes a first optical surface, a second optical surface perpendicular to the first optical surface, and a reflective surface inclined relative to the first optical surface and the second optical surface. The plurality of converging lenses are formed on the first optical surface. The coupling body is located above the circuit board and the plurality of converging lenses are aligned with the light emitting module and the light receiving module. The fiber receiving portion includes a front end, a rear end opposite to the front end, and a plurality of through holes passing through the front end and the rear end and corresponding to the plurality of optical fibers one by one. The fiber receiving part is plugged on the optical coupling part and the front end is opposite to the second optical surface. Each optical fiber includes a fiber body and an optical lens located on an end face of one end of the fiber body. The plurality of optical fibers are accommodated in the corresponding through holes, and the plurality of optical lenses protrude from the corresponding through holes and correspond to the plurality of converging lenses one by one. The reflective surface is used to reflect the light emitted by the light-emitting module and enter through the corresponding converging lens to the corresponding optical lens so as to enter the corresponding optical fiber body and pass through the plurality of optical fiber bodies and then enter the light through the plurality of optical lenses. The light is reflected to the corresponding converging lens and enters the corresponding light receiving module through the corresponding converging lens.

Compared with the prior art, in the optical fiber coupling connector of the present invention, the optical fiber receiving part is provided with a through hole, and the optical lens is arranged on the optical fiber body, which avoids setting a medium between the optical fiber body and the optical lens to reduce the refraction of light interface, thereby improving the transmission efficiency of optical signals.

Description of drawings

FIG. 1 is a schematic perspective view of an optical fiber coupling connector provided by an embodiment of the present invention.

FIG. 2 is an exploded schematic diagram of the fiber coupling connector in FIG. 1 .

FIG. 3 is an exploded view from another perspective of the optical fiber coupling connector in FIG. 1 .

FIG. 4 is a schematic cross-sectional view of the fiber coupling connector in FIG. 1 along line IV-IV.

FIG. 5 is a schematic cross-sectional view of the fiber coupling connector in FIG. 1 along line V-V.

Description of main component symbols

Fiber Coupler 100 circuit board 10 upper surface 12 lower surface 14 Fastening hole 16 Lighting module 20 Receiver module 30 Optical coupler 40 coupled ontology 42 top surface 420 top groove 4200 first side 4202 second side 4204 Reflective surface 4206 bottom surface 422 Bottom groove 4220 first optical surface 4222 front surface 424 gap 4240 Bearing surface 4242 Staircase 4244 second optical surface 4246 Mounting surface 4248 back surface 426 converging lens 44 Fitting 46 pin 48 Fiber Storage Department 50 front end 52 Optical coupling surface 520 mating surface 522 Socket 5220 rear end 54 through hole 56 bearer segment 562 insert paragraph 564 Containment section 566 optical fiber 60 Fiber body 62 optical lens 64

The following specific embodiments will further illustrate the present invention in conjunction with the above-mentioned drawings.

Detailed ways

The embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

Please refer to FIG. 1 and FIG. 2 , which illustrate a fiber coupling connector 100 provided by an embodiment of the present invention. The fiber coupling connector 100 includes a circuit board 10 , two light emitting modules 20 , two light receiving modules 30 , an optical coupling portion 40 , an optical fiber receiving portion 50 and four optical fibers 60 .

The circuit board 10 includes an upper surface 12 and a lower surface 14 . The upper surface 12 and the lower surface 14 are located on opposite sides of the circuit board 10 , and the upper surface 12 is parallel to the lower surface 14 . The circuit board 10 also defines two engaging holes 16 , and the two engaging holes 16 are cylindrical through holes penetrating through the upper surface 12 and the lower surface 14 .

The two light-emitting modules 20 and the two light-receiving modules 30 are fixed on the upper surface 12 and are electrically connected to the circuit board 10 . Specifically, the two light emitting modules 20 and the two light receiving modules 30 are sequentially arranged in a straight line. In this embodiment, the two light emitting modules 20 can be vertical resonant plane laser diodes, which are used to convert electrical signals into optical signals and emit light to the outside. The two light receiving modules 30 are used to receive light from the outside and convert light signals into electrical signals.

Please refer to FIGS. 2 to 4 together. The optical coupling part 40 includes a coupling body 42 , four converging lenses 44 , two engaging parts 46 and two pins 48 .

The coupling body 42 includes a top surface 420 , a bottom surface 422 , a front surface 424 and a rear surface 426 . The top surface 420 and the bottom surface 422 are located on opposite sides of the coupling body 42 , and the top surface 420 is parallel to the bottom surface 422 . The front surface 424 and the rear surface 426 are located on opposite sides of the coupling body 42 , and the front surface 424 is parallel to the rear surface 426 .

The top surface 420 defines a bar-shaped top surface groove 4200 . The top groove 4200 includes a first surface 4202 , a second surface 4204 and a reflective surface 4206 . The first surface 4202 is located at the bottom of the top groove 4200 and parallel to the top surface 420 . The second surface 4204 is located on one side of the top surface groove 4200 and vertically connected with the first surface 4202 and the top surface 420 . The reflective surface 4206 is located on the other side of the top groove 4200 and is obliquely connected to the first surface 4202 and the top surface 420 .

The bottom surface 422 defines a cuboid bottom surface groove 4220 . The bottom groove 4220 includes a first optical surface 4222 . The first optical surface 4222 is located at the bottom of the bottom groove 4220 and is parallel to the top surface 420 and the bottom surface 422 .

A notch 4240 is defined on the front surface 424 . The notch 4240 includes a supporting surface 4242 and a stepped portion 4244 . The supporting surface 4242 is located at the bottom of the notch 4240 and parallel to the top surface 420 . The stepped portion 4244 is perpendicular to the carrying surface 4242 and includes a second optical surface 4246 and two installation surfaces 4248 . The second optical surface 4246 is parallel to the front surface 424 . The two installation surfaces 4248 are respectively located at opposite ends of the second optical surface 4246 , and the two installation surfaces 4248 are located on the same plane and parallel to the front surface 424 . The second optical surface 4246 is recessed toward the rear surface 426 relative to the two mounting surfaces 4248 . In this embodiment, the reflective surface 4206 is inclined 45 degrees relative to the first optical surface 4222 , and the reflective surface 4206 is also inclined 45 degrees relative to the second optical surface 4246 .

The four converging lenses 44 are located on the first optical surface 4222 and arranged in a straight line. The four converging lenses 44 are opposite to the reflective surface 4206 . In this embodiment, the four converging lenses 44 and the coupling body 42 are integrally formed. The two engaging portions 46 are perpendicular to the bottom surface 422 and extend away from the top surface 420 and correspond to the two engaging holes 16 . The two pins 48 extend perpendicular to the two mounting surfaces 4248 and extend away from the rear surface 426 .

The fiber receiving portion 50 includes a front end 52 and a rear end 54 . The front end 52 and the rear end 54 are respectively located on opposite sides of the fiber receiving portion 50 . The front end 52 includes an optical coupling surface 520 and two insertion surfaces 522 . The two insertion surfaces 522 are respectively located at opposite ends of the optical coupling surface 520 . The two insertion surfaces 522 are located on the same plane, and each insertion surface 522 defines an insertion hole 5220 corresponding to the pin 48 . The light coupling surface 520 is recessed toward the rear end 54 relative to the two insertion surfaces 522 . The fiber receiving portion 50 defines four through holes 56 passing through the optical coupling surface 520 and the rear end 54 . The four through holes 56 correspond one to one to the four optical fibers 60 , and on the optical coupling surface 520 , the four through holes 56 are also arranged in a straight line to correspond to the four converging lenses 44 one to one. Each through hole 56 includes a carrying section 562 , an inserting section 564 and a receiving section 566 . The carrying section 562 , the inserting section 564 and the receiving section 566 are sequentially arranged along the direction from the rear end 54 to the front end 52 . The carrying section 562 is semi-cylindrical, the inserting section 564 is conical, and the receiving section 566 is cylindrical.

Each fiber 60 includes a fiber body 62 and an optical lens 64 . The optical lens 64 is formed on an end face of one end of the fiber body 62 . The four optical fibers 60 are respectively accommodated in the four through holes 56 , and the four optical lenses 64 protrude from the corresponding through holes 56 , that is, the four optical lenses 64 protrude relative to the optical coupling surface 520 .

When assembling the optical fiber coupling connector 100 , firstly, the two engaging portions 46 are respectively engaged in the two engaging holes 16 so that the optical coupling portion 40 is fixed above the circuit board 10 . At this time, the light emitting module 20 and the light receiving module 30 are accommodated in the bottom groove 4220 , and the four converging lenses 44 are respectively aligned with the light emitting module 20 and the light receiving module 30 . Next, the two pins 48 are respectively inserted into the two insertion holes 5220 so that the fiber receiving portion 50 is fixed on the optical coupling portion 40 . At this moment, the fiber receiving portion 50 is loaded on the bearing surface 4242 , the two installation surfaces 4248 are in contact with the two insertion surfaces 522 , and the optical coupling surface 520 is parallel to and opposite to the second optical surface 4246 .

When working, please refer to FIG. 4 , the circuit board 10 supplies power to the light-emitting module 20 , and the light-emitting module 20 converts electrical signals into light signals and emits light L1 to the outside. The light L1 emitted by the light emitting module 20 is converted into parallel light L2 by the corresponding converging lens 44 and enters the coupling body 42, and then the parallel light L2 is reflected by the reflective surface 4206 to form parallel light L3, and finally the parallel light L3 is The lens 64 converges into the corresponding fiber body 62 .

Correspondingly, please refer to FIG. 5 , the light from the fiber body 62 enters the coupling body 42 in the form of parallel light after passing through the corresponding optical lens 64 , and then is reflected by the reflecting surface 4206 and changed by 90 degrees, and then is reflected by the corresponding converging lens 44 Converge into the corresponding light receiving module 30. The light receiving module 30 converts the light signal into an electrical signal for transmission to the backend for processing.

Whether the optical fiber coupling connector 100 provided by the present invention is used as the transmitting end of the optical signal or as the receiving end of the optical signal, an additional medium is avoided between the optical fiber body 62 and the optical lens 64. Therefore, the refraction interface of the light is reduced, Thereby, the transmission efficiency of the optical signal is improved.

It can be understood that those skilled in the art can make various other corresponding changes and modifications according to the technical concept of the present invention, and all these changes and modifications should belong to the protection scope of the claims of the present invention.

Claims (8)

1. an optical-fiber coupling connector, comprise circuit board, light emitting module, receive optical module, optically-coupled portion, optical fiber resettlement section and multifiber, this light emitting module and this receipts optical module set firmly on the board spaced reciprocally, this optically-coupled portion comprises coupling body and multiple convergent lens, this coupling body comprises the first optical surface, the reflecting surface that second optical surface vertical with this first optical surface and this first optical surface relative and this second optical surface all tilt, the plurality of convergent lens is formed on this first optical surface, this coupling body is positioned at this circuit board and the plurality of convergent lens is aimed at this light emitting module and this receipts optical module, this optical fiber resettlement section comprises front end, the rear end opposing with this front end and run through this front end and this rear end and with this multifiber multiple through hole one to one, this optical fiber resettlement section to be plugged on this coupling body and to make this front end relative with this second optical surface, each optical fiber comprise optical fiber body and be positioned at this optical fiber body one end end face on optical lens, this each optical fiber is housed in corresponding through hole, the plurality of optical lens stretch out in the through hole of correspondence and with the plurality of convergent lens one_to_one corresponding, this reflecting surface be used for by sent by this light emitting module and the light reflection entering this coupling body through the convergent lens of correspondence to corresponding optical lens to enter in corresponding optical fiber body and corresponding receipts optical module will be entered by the light reflection of the plurality of optical lens outgoing to corresponding convergent lens and through the convergent lens of correspondence after this multifiber body.

2. optical-fiber coupling connector as claimed in claim 1, it is characterized in that, this optically-coupled portion also comprises two holding sections, this coupling body also comprises end face and the bottom surface opposing with this top surface being parallel, this bottom surface offers bottom recesses, the bottom of this bottom recesses is this first optical surface, these two holding sections to be vertically set on this bottom surface and to extend towards the direction away from this end face, this circuit board offers two connecting holes corresponding with these two holding sections, these two holding sections are fastened in this connecting hole, this light emitting module and this receipts optical module are housed in this bottom recesses.

3. optical-fiber coupling connector as claimed in claim 2, it is characterized in that, this optically-coupled portion also comprises two pins, this coupling body also comprises front surface and opposing rear surface parallel with this front surface, this front surface offers breach, this breach comprises the end difference of loading end and vertically this loading end extension being positioned at bottom, this end difference comprises the installed surface that this second optical surface of this front surface parallel and two lay respectively at these opposing two ends of the second optical surface and this front surface parallel, this second optical surface relatively these two installed surfaces caves in towards the direction of this rear surface, this front end comprises the plug surface that optically-coupled face and two lay respectively at opposing two ends, this optically-coupled face, cave in towards the direction of this rear end in this optically-coupled face relatively these two plug surfaces, each plug surface offers the spliced eye corresponding with this pin, these two pins insert in corresponding spliced eye, this optical fiber resettlement section is carried on this loading end, these two installed surfaces and this two plug surfaces are conflicted, this optically-coupled face is parallel relative with this second optical surface.

4. optical-fiber coupling connector as claimed in claim 3, it is characterized in that, this end face offers end face groove, this end face groove comprise be positioned at bottom and with the first surface of this top surface being parallel, this reflecting surface tilting to be connected this first surface and this end face and vertical second of connecting this first surface and this end face, this reflecting surface and this second face lay respectively at the opposing both sides of this first surface, and this reflecting surface is relative with this convergent lens.

5. optical-fiber coupling connector as claimed in claim 1, it is characterized in that, this light emitting module and this receipts optical module are arranged in straight line, and the plurality of convergent lens is arranged in straight line.

6. optical-fiber coupling connector as claimed in claim 4, is characterized in that, this reflecting surface relatively this first optical surface tilts 45 degree, and this reflecting surface relatively this second optical surface tilts 45 degree.

7. optical-fiber coupling connector as claimed in claim 1, it is characterized in that, each through hole comprises carrying section, inserting paragraph and collecting section, this carrying section, this inserting paragraph and this collecting section connect successively along the direction of this rear end to this front end, this carrying section is the semicolumn bodily form, conically, this collecting section is cylindrical to this inserting paragraph.

8. optical-fiber coupling connector as claimed in claim 1, is characterized in that, this coupling body and the plurality of convergent lens are formed in one structure.