CN211348748U

CN211348748U - Optical module structure

Info

Publication number: CN211348748U
Application number: CN201922296503.9U
Authority: CN
Inventors: 王向飞; 于光龙; 贾旭
Original assignee: Fuzhou Gaoyi Communication Co Ltd
Current assignee: Fuzhou Gaoyi Communication Co Ltd; Photop Technologies Inc
Priority date: 2019-12-19
Filing date: 2019-12-19
Publication date: 2020-08-25
Anticipated expiration: 2029-12-19

Abstract

The utility model discloses an optical module structure, include: the transmitting mechanism comprises a VCSEL laser, a first coupling lens array and a focusing lens array, wherein the VCSEL laser is provided with a plurality of VCSEL laser units; the receiving mechanism comprises a collimating lens array, a wavelength filter, a second coupling lens array and a PD photoelectric detector, and the PD photoelectric detector is provided with a plurality of PD receiving units; a pair of graded-index optical fibers connecting the transmitting means and the receiving means and for transmitting optical signals; the pair of circuit boards respectively correspond to the transmitting mechanism and the receiving mechanism one by one and weld the transmitting mechanism and the receiving mechanism on the circuit boards; the optical part of the scheme adopts a plastic material to replace a glass material, the emission end eliminates the use of a wavelength filter, the optical debugging is changed from active debugging into passive debugging, the material cost and the assembly cost of the optical module are effectively reduced, the optical module can be used for optical high-definition multimedia interconnection, the structure is simple, the cost is low, and the increasing consumer market demand can be met.

Description

Optical module structure

Technical Field

The utility model belongs to the technical field of the photoelectric technology and specifically relates to an optical module structure.

Background

In recent years, cost-effective short-range interconnects have gained widespread attention. Due to the rapidly increasing demand for high capacity video, data, and audio signal transmission, optical interconnects suitable for consumer electronics such as smart phones, televisions, game consoles, etc. have begun to become viable alternatives to traditional copper-based cables. Optical interconnects offer significant advantages over conventional copper-based cables in bandwidth, electromagnetic interference, thermal management, and weight. The availability of low-cost consumer optical components is critical to speed the entry of optical interconnects into the market. These modules can significantly reduce the cost of the optical module by mainly reducing the cost of the light source and connecting the optical fibers, and simplifying the assembly process to meet the growing consumer market demand.

Previous optical High Definition Multimedia Interface (HDMI) interconnects were primarily composed of optical modules (OSA). These modules perform the wavelength division multiplexing function by means of WDM filters through an active optical assembly scheme.

Disclosure of Invention

To the situation of the prior art, an object of the utility model is to provide an optical module structure that simple structure, with low costs and optical property are good.

In order to realize the technical purpose, the utility model adopts the technical scheme that:

a light module structure, comprising:

a Transmitter Optical Subassembly (TOSA) including a VCSEL laser having a plurality of VCSEL laser units, a first coupling lens array, and a focusing lens array arranged in this order;

a Receiver (ROSA) including a collimating lens array, a wavelength filter, a second coupling lens array, and a PD photodetector, which are sequentially arranged, the PD photodetector having PD receiving units corresponding to the VCSEL laser units one-to-one;

a pair of graded-index optical fibers connecting the transmitting means and the receiving means and for transmitting optical signals;

and the pair of circuit boards respectively correspond to the transmitting mechanism and the receiving mechanism one by one and weld the transmitting mechanism and the receiving mechanism on the circuit boards.

As a possible implementation manner, further, the VCSEL laser is composed of four VCSEL laser units, and the four VCSEL laser units are divided into two groups, where one of the VCSEL laser units in each group corresponds to a laser operating wavelength λ 1, and the other VCSEL laser unit corresponds to a laser operating wavelength λ 2; the PD photoelectric detector correspondingly has four PD receiving units.

As a preferred alternative, it is preferable that the laser operating wavelength corresponding to λ 1 is 850nm, and the laser operating wavelength corresponding to λ 2 includes at least one of 825nm, 880nm, 910nm, and 970 nm.

As a preferred optional embodiment, preferably, the VCSEL laser unit of the VCSEL laser is fixed on a metal pad by silver paste, and is connected to the metal pad by gold wire bonding, and a Pin corresponding to the VCSEL laser unit is further welded on the metal pad and is used for signal transmission; the PD receiving unit of the PD photoelectric detector is also fixed on a metal bonding pad through silver adhesive, and is connected with the circuit to the metal bonding pad through gold wire welding, a Pin needle corresponding to the PD receiving unit is also welded on the metal bonding pad, and the Pin needle is used for transmitting signals.

As a preferred optional implementation manner, preferably, the pair of circuit boards are both PCB hard boards, and the Pin pins on the metal pads corresponding to the VCSEL laser and the PD photodetector are both soldered on the corresponding PCB hard boards.

As a preferred optional implementation manner, preferably, the wavelength filter includes a pair of wavelength filters and a pair of reflectors, and one of the wavelength filters and one of the reflectors corresponds to a set of VCSEL laser units, the wavelength filter is opposite to the collimating lens array and is used for receiving the laser signal emitted from the collimating lens array, and the reflector is opposite to the wavelength filter and is used for receiving the laser signal reflected by the wavelength filter and reflecting the laser signal to a corresponding PD receiving unit, wherein the laser signal output by a set of VCSEL laser units of the emitting mechanism is coupled by the first coupling lens array, and then enters the focusing lens array to be focused and input to one of the graded-index optical fibers, and is output to the collimating lens array of the receiving mechanism from the other end of the graded-index optical fiber to be collimated, and then is input to the wavelength filter opposite to the part of the collimating lens array, the laser signals with the same working wavelength as the wavelength filter pass through the wavelength filter and pass through the second coupling lens array to enter the corresponding PD receiving unit, the laser signals with the different working wavelengths from the wavelength filter are reflected to the reflector opposite to the wavelength filter, and the laser signals are reflected to the second coupling lens array by the reflector and then enter the corresponding PD receiving unit.

As a possible implementation manner, further, the first coupling lens array, the focusing lens array, the collimating lens array, the second coupling lens array, and the pair of graded-index optical fibers are all made of polycarbonate material by injection molding.

As a possible implementation, further, it still includes the first packaging mechanism who is used for encapsulating emission mechanism, first packaging mechanism include first base, first apron, first fiber splice and a plurality of first screw, the up end of first base be equipped with VCSEL laser instrument, first coupling lens array, focusing lens array and the first profile modeling storage tank that first fiber splice structure suited, after VCSEL laser instrument, first coupling lens array, focusing lens array and first fiber splice placed first profile modeling storage tank, first apron lid establish at first base up end and through the fixed encapsulation of first screw.

As a possible implementation manner, the optical fiber connector further includes a second packaging mechanism for packaging the receiving mechanism, the second packaging mechanism includes a second base, a second cover plate, a plurality of second screws, and a second optical fiber connector, a second profiling accommodating groove adapted to the collimating lens array, the wavelength filter, the second coupling lens array, the PD photodetector, and the second optical fiber connector is disposed on an upper end surface of the second base, the collimating lens array, the wavelength filter, the second coupling lens array, the PD photodetector, and the second optical fiber connector are disposed behind the second profiling accommodating groove, and the second cover plate covers the upper end surface of the second base and is fixed and packaged by the second screws.

The first base, the first cover plate, the first screw, the second base, the second cover plate and the second screw of the transmitting mechanism (TOSA) and the receiving mechanism (ROSA) are all made of polyamide materials.

As a preferred alternative, it is preferred,

the first coupling lens array comprises a plurality of first coupling lenses arranged in an array and a first prism for relatively fixing the plurality of first coupling lenses;

the focusing lens array is composed of a pair of focusing lenses, one end of each focusing lens is opposite to the corresponding first coupling lens of the VCSEL laser units divided into two groups, and the other end of each focusing lens is opposite to one end of each optical fiber with the gradually-changing refractive index;

the optical fibers with the gradually-changed refractive indexes are plastic optical fibers;

the collimating lens array is composed of a pair of collimating lenses, one end of each collimating lens is opposite to the other end of each graded-index optical fiber, and the other end of each collimating lens is opposite to the wavelength filter;

the second coupling lens array comprises a plurality of second coupling lenses arranged in an array and a second prism for relatively fixing the plurality of second coupling lenses.

According to the optical module structure, the HDMI interfaces are arranged on the circuit boards corresponding to the transmitting mechanism and the receiving mechanism and connected with the pin interfaces corresponding to the VCSEL laser unit and the PD receiving unit, so that the optical module can be used as an optical high-definition multimedia interface (HDMI) interconnection optical module (OSA), an expensive wavelength filter is not needed, the optical module is assembled through an optical passive alignment scheme, and the component parts are manufactured through a precision injection molding technology. The scheme particularly relates to a four-channel Transmitter Optical Subassembly (TOSA) and a Receiver Optical Subassembly (ROSA), and the HDMI interconnection of the modules can transmit data at a rate of more than 6.5Gbps so as to ensure that the modules are applied to transmission of full high-definition video signals.

In the present embodiment, the four VCSEL laser units are divided into two groups oppositely arranged, and considering that the two groups operate identically, the operation of the proposed interconnection is described only for the case of one of the groups as follows: for the TOSA, two beams generated by the VCSEL are responsible for ch1 and ch2 signals, and after being focused and coupled by the first coupling lens array, two parallel beams are refracted by a prism by 90 degrees and output. The two parallel beams are incident on the same focusing lens in the off-axis direction for focusing and coupling to a graded index plastic optical fiber, thereby eliminating the need for a WDM filter, which is necessary in conventional optical module solutions.

For ROSA, two beams of light from two graded index plastic fibers are collimated by a collimating lens array and then split into two parallel beams by a λ 1, λ 2 optical filter wavelength filter: λ 1 and λ 2, the filter serving to selectively reflect and transmit the light beam. The two parallel beams are finally coupled to the PD photodetector in a focusing manner.

The utility model discloses a module is designed to have loose structural tolerance, allows passive full passive alignment process, does not need the initiative control, has saved the initiative time of focusing on the light debugging, has reduced manufacturing cost effectively.

The VCSEL and PD are mounted on a metal pad with a pick tool with the help of positioning marks and fixed with silver paste. The VCSEL and the PD are connected with a circuit to a metal bonding pad through gold wire welding, a pin needle is welded on the metal bonding pad, and signals are transmitted out through the pin needle.

The optical fiber is fixed on the optical fiber connector through glue. The VCSEL welding pad containing VCSEL and pin connection is inserted into a first copying containing groove in a first base of a transmitting mechanism (TOSA), an optical fiber connector, a first coupling lens array and a focusing lens array are fixed by glue according to the positioning of the first copying containing groove in the first base, the optical fiber connector, the first coupling lens array and the focusing lens array are inserted into the first base of the transmitting mechanism (TOSA) one by one, and then the first cover plate and a first screw are fixed to form a TOSA optical transmitter assembly. The PD bonding pad comprising PD and pin connection is inserted into a second profiling accommodating groove on a second base of a receiving mechanism (ROSA), the optical fiber connector, the collimating lens array, the wavelength filter and the second coupling lens array are fixed by glue according to the second profiling accommodating groove on the second base of the receiving mechanism (ROSA), and are inserted into the second base of the receiving mechanism (ROSA) one by one and then fixed by a second shell and a second screw to form the ROSA optical receiver assembly.

Adopt foretell technical scheme, compared with the prior art, the utility model, its beneficial effect who has is: the optical part in the scheme adopts a plastic material to replace a glass material, the use of the wavelength filter is eliminated at the transmitting end, the active debugging is changed into the passive debugging in the optical debugging, and the material cost and the assembly cost of the optical module are effectively reduced. The scheme can be used for optical high-definition multimedia interconnection, has simple structure and low cost, and can meet the increasing consumer market demand.

Drawings

The scheme of the invention is further explained by combining the attached drawings and the detailed embodiment:

fig. 1 is a schematic diagram of an optical module structure and a schematic diagram of each component in an optical path according to the present invention;

fig. 2 is a schematic diagram of a VCSEL laser or a PD photodetector of an optical module structure according to the present invention welded on a metal pad forming assembly;

fig. 3 is a schematic structural diagram of a TOSA (transmitter architecture) of an optical module structure according to the present invention;

fig. 4 is a schematic structural diagram of a ROSA (receiver) of an optical module structure according to the present invention;

fig. 5 is a schematic connection diagram of an optical module structure according to the present invention.

Detailed Description

As shown in one of fig. 1 to 5, the optical module structure of the present invention includes:

a Transmitter Optical Subassembly (TOSA)1 including a VCSEL laser 11, a first coupling lens array 12, and a focusing lens array 13, which are sequentially disposed, the VCSEL laser 11 having a plurality of VCSEL laser units 111;

a Receiver (ROSA)2 including a collimator lens array 21, a wavelength filter 22, a second coupling lens array 23, and a PD photodetector 24, which are sequentially arranged, the PD photodetector 24 having PD receiving units 241 corresponding to the VCSEL laser units 111 one by one;

a pair of graded-index optical fibers 3 connecting the transmitter section 1 and the receiver section 2 and transmitting optical signals;

and a pair of circuit boards 4 which correspond to the transmitting mechanisms 1 and the receiving mechanisms 2 one by one and weld the transmitting mechanisms 1 and the receiving mechanisms 2 on the circuit boards 4.

Referring to fig. 1 heavily, as a possible implementation manner, the VCSEL laser 11 is composed of four VCSEL laser units 111, and the four VCSEL laser units 111 are divided into two groups, where one of the VCSEL laser units in each group corresponds to a laser operating wavelength λ 1, and the other VCSEL laser unit corresponds to a laser operating wavelength λ 2; the PD photodetector 24 has four PD receiving units 241 correspondingly. In this embodiment, the four VCSEL laser units 111 are divided into two groups, one group corresponds to 2 wavelengths CH1(λ 1) and CH2(λ 2), and the other group corresponds to two wavelengths CH3(λ 1) and CH4(λ 2); as a preferred alternative, it is preferable that the laser operating wavelength corresponding to λ 1 is 850nm, and the laser operating wavelength corresponding to λ 2 includes at least one of 825nm, 880nm, 910nm and 970 nm.

Referring to fig. 3, the VCSEL laser unit 111 of the VCSEL laser 11 is fixed on a metal pad 112 by silver paste, and is connected to the metal pad 112 by gold wire bonding, a Pin 113 corresponding to the VCSEL laser unit 111 is further welded on the metal pad 112, and the Pin 113 is used for signal transmission; the PD receiving unit of the PD photoelectric detector is also fixed on a metal bonding pad through silver adhesive, and is connected with the circuit to the metal bonding pad through gold wire welding, a Pin needle corresponding to the PD receiving unit is also welded on the metal bonding pad, the Pin needle is used for transmitting signals, the arrangement form of the Pin needle is consistent with the arrangement form of the VCSEL laser unit 111 of the VCSEL laser 11 on the metal bonding pad, and the repeated description of the drawing is omitted.

As a preferred alternative, it is preferable that the pair of circuit boards 4 are both PCB hard boards, the PCB hard board is made of low-cost FR4 or other common circuit board materials, and the Pin pins on the metal pads corresponding to the VCSEL laser 11 and the PD photodetector 24 are soldered on the corresponding PCB hard boards.

As a preferred optional embodiment, preferably, the wavelength filter 22 includes a pair of wavelength filters 221 and a pair of reflectors 222, and one wavelength filter 221 and one reflector 222 correspond to a set of VCSEL laser units 111, the wavelength filter 221 is opposite to the collimating lens array 21 and is used for receiving the laser signal emitted from the collimating lens array 21, the reflector 222 is opposite to the wavelength filter 221 and is used for receiving the laser signal reflected by the wavelength filter 221 and reflecting the laser signal to a corresponding PD receiving unit 241, wherein the specific optical path sequence is that, after the laser signals output by a set of VCSEL laser units 111 of the emitting mechanism 1 are coupled by the first coupling lens array 12, the laser signals enter the focusing lens 13 array for focusing and inputting to one of the graded-index optical fibers 3, and are output from the other end of the graded-index optical fiber 3 to the collimating lens array 21 of the receiving mechanism 2 for collimating, then, the laser signals with the same working wavelength as the wavelength filter 221 pass through the wavelength filter 221 and the second coupling lens array 23, and then enter the corresponding PD receiving unit 241, the laser signals with the different working wavelength as the wavelength filter 221 are reflected to the reflecting mirror 222 opposite to the wavelength filter, and the reflecting mirror 222 reflects the laser signals to the second coupling lens array 23, and then enters the corresponding PD receiving unit 241.

As a possible implementation manner, the first coupling lens array 12, the focusing lens array 13, the collimating lens array 21, the second coupling lens array 23, and the pair of graded-index 3 optical fibers are all made of polycarbonate material by injection molding.

In order to facilitate practical application, as a possible implementation manner, the present solution further includes a first packaging mechanism for packaging the emission mechanism 1, the first packaging mechanism includes a first base 14, a first cover plate 15, a first optical fiber connector 17 and a plurality of first screws 16, a first profiling accommodating groove 141 adapted to the VCSEL laser 11, the first coupling lens array 12, the focusing lens array 13 and the first optical fiber connector 17 is disposed on an upper end surface of the first base 14, the VCSEL laser 11, the first coupling lens array 12, the focusing lens array 13 and the first optical fiber connector 17 are disposed behind the first profiling accommodating groove 141, and the first cover plate 15 is disposed on an upper end surface of the first base 14 and is fixedly packaged by the first screws 16. The packaging form is that the optical fibers 3 are assembled together according to the position marks on the first base of the TOSA in a passive assembly mode without optical debugging, and the first connecting head 31 matched with the first optical connector 17 is correspondingly arranged on the gradient-refractive-index optical fiber.

Also, as a possible implementation manner, further, the optical fiber connector system further includes a second packaging mechanism for packaging the receiving mechanism 2, the second packaging mechanism includes a second base 25, a second cover plate 26, a plurality of second screws 27 and a second optical fiber connector 28, a second profiling accommodating groove 251 is disposed on an upper end surface of the second base 25 and is structurally matched with the collimating lens array 21, the wavelength filter 22, the second coupling lens array 23, the PD photodetector 24 and the second optical fiber connector 28, the collimating lens array 21, the wavelength filter 22, the second coupling lens array 23, the PD photodetector 24 and the second optical fiber connector 28 are disposed in the second profiling accommodating groove 251, and the second cover plate 26 covers an upper end surface of the second base 25 and is fixedly packaged by the second screws 27. The packaging mode is that the optical fiber 3 is assembled together according to the position mark on the second base of the ROSA in a passive assembly mode without optical debugging, and a second connector 32 matched with the second optical fiber connector 28 is correspondingly arranged on the optical fiber 3 with the gradually-changed refractive index; as a preferred alternative embodiment, the first base 14, the first cover 15, the first screw 16, the second base 25, the second cover 26 and the second screw 27 of the transmitter assembly (TOSA)1 and the receiver assembly (ROSA)2 are all preferably made of polyamide material.

As a preferred alternative, it is preferred,

the first coupling lens array 12 includes a plurality of first coupling lenses 121 arranged in an array and a first prism for relatively fixing the plurality of first coupling lenses;

the focusing lens array 13 is composed of a pair of focusing lenses, one end of each focusing lens is opposite to the first coupling lens 121 corresponding to the two groups of VCSEL laser units 111, and the other end of each focusing lens is opposite to one end of the pair of graded-index optical fibers 3;

the optical fibers 3 with the gradually-changed refractive indexes are plastic optical fibers;

the collimating lens array 21 is composed of a pair of collimating lenses, one end of each of the collimating lenses is opposite to the other end of each of the graded-index optical fibers 3, and the other end of each of the collimating lenses is opposite to the wavelength filter 22;

the second coupling lens array 23 includes a plurality of second coupling lenses 231 arranged in an array and a second prism for relatively fixing the plurality of second coupling lenses.

The optical module structure of the scheme is characterized in that an HDMI (high-definition multimedia interface) 5 is arranged on a circuit board corresponding to a transmitting mechanism 1 and a receiving mechanism 2 and connected with

pin interfaces

113 and 243 corresponding to VCSEL laser units 11 and PD receiving units 24, so that the optical module can be used as an optical high-definition multimedia interface (HDMI) interconnection optical module (OSA), an expensive wavelength filter is not needed, the optical module is assembled through an optical passive alignment scheme, and the component parts are manufactured by a precision injection molding technology. The scheme particularly relates to a four-channel optical Transmitter Optical Subassembly (TOSA)1 and a Receiver Optical Subassembly (ROSA)2, and the HDMI interconnection of the modules can transmit data at a rate of more than 6.5Gbps so as to ensure that the modules are applied to transmission of full high-definition video signals.

In this embodiment, the four VCSEL laser units 111 are divided into two groups which are oppositely arranged, and considering that the two groups operate identically, the operation of the proposed interconnection is described in the above case of only one of the groups as follows: for the TOSA, two beams of light generated by the VCSEL are responsible for ch1 and ch2 signals, and are focused and coupled by the first coupling lens array 12 and the focusing lens array 13, and then refracted by a prism by 90 degrees to output two parallel beams of light. The two parallel beams are incident on the same focusing lens in the off-axis direction for focusing and coupling to a graded index plastic optical fiber 3, thereby eliminating the need for a WDM filter, which is necessary in conventional optical module solutions.

The VCSEL and PD are mounted on the metal pad 112 with a pick tool with the help of positioning marks and fixed with silver paste. The VCSEL and the PD are connected with a circuit to the metal bonding pad 112 through gold wire welding, pin needles are welded on the metal bonding pad 112, and signals are transmitted through the pin needles.

The optical fiber is fixed on the optical fiber connector through glue. The VCSEL pads containing the VCSEL and pin connections are inserted into the first profile receiving groove 141 on the first base 14 of the Transmitter Optical Subassembly (TOSA), and the first fiber connector 17, the first coupling lens array 12, and the focusing lens array 13 are fixed by glue according to the positioning of the first profile receiving groove 141 on the first base 14, inserted into the first base 14 of the Transmitter Optical Subassembly (TOSA), and then fixed by the first cover plate 15 and the first screw 16, thereby forming the TOSA optical transmitter assembly. The PD pad including the PD and pin connections is inserted into the second profile receiving groove 251 on the second base 25 of the receiver mechanism (ROSA), and the second optical fiber connector 28, the collimator lens array 21, the wavelength filter 22, and the second coupling lens array 23 are fixed by glue according to the second profile receiving groove 251 on the second base 25 of the receiver mechanism (ROSA), inserted into the second base 25 of the receiver mechanism (ROSA), and then fixed by the second housing 26 and the second screw 27, thereby forming a ROSA optical receiver assembly.

It is noted that variations and modifications of the embodiments disclosed herein are possible, and that alternatives and equivalents of the various components of the embodiments are known to those of ordinary skill in the art. It will be clear to those skilled in the art that the present invention may be embodied in other forms, structures, arrangements, proportions, and with other characteristics, without departing from the spirit or essential characteristics thereof.

Claims

1. An optical module structure, characterized in that: it includes:

the transmitting mechanism comprises a VCSEL laser, a first coupling lens array and a focusing lens array which are arranged in sequence, wherein the VCSEL laser is provided with a plurality of VCSEL laser units;

the receiving mechanism comprises a collimating lens array, a wavelength filter, a second coupling lens array and a PD photoelectric detector which are sequentially arranged, wherein the PD photoelectric detector is provided with PD receiving units which are in one-to-one correspondence with the VCSEL laser units;

2. A light module arrangement according to claim 1, characterized in that: the VCSEL laser is composed of four VCSEL laser units, the four VCSEL laser units are divided into two groups, the laser working wavelength corresponding to one VCSEL laser unit in each group is lambda 1, and the laser working wavelength corresponding to the other VCSEL laser unit in each group is lambda 2; the PD photoelectric detector correspondingly has four PD receiving units.

3. A light module structure according to claim 2, characterized in that: the working wavelength of the laser corresponding to the lambda 1 is 850nm, and the working wavelength of the laser corresponding to the lambda 2 at least comprises one of 825nm, 880nm, 910nm and 970 nm.

4. A light module structure according to claim 2, characterized in that: the VCSEL laser unit of the VCSEL laser is fixed on a metal bonding pad through silver adhesive, and is welded and connected with a circuit to the metal bonding pad through gold wires, and a Pin needle corresponding to the VCSEL laser unit is also welded on the metal bonding pad and used for transmitting signals; the PD receiving unit of the PD photoelectric detector is also fixed on a metal bonding pad through silver adhesive, and is connected with the circuit to the metal bonding pad through gold wire welding, a Pin needle corresponding to the PD receiving unit is also welded on the metal bonding pad, and the Pin needle is used for transmitting signals.

5. A light module structure according to claim 4, characterized in that: the pair of circuit boards are PCB hard boards, and Pin needles on metal bonding pads corresponding to the VCSEL laser and the PD photoelectric detector are welded on the corresponding PCB hard boards.

6. A light module structure according to claim 2, characterized in that: the wavelength filter comprises a pair of wavelength filters and a pair of reflectors, one wavelength filter and one reflector correspond to a group of VCSEL laser units, the wavelength filter is opposite to the collimating lens array and is used for receiving laser signals emitted by the collimating lens array, the reflector is opposite to the wavelength filter and is used for receiving the laser signals reflected by the wavelength filter and reflecting the laser signals to a corresponding PD receiving unit, wherein the laser signals output by the group of VCSEL laser units of the emitting mechanism are coupled by the first coupling lens array, then are emitted into the focusing lens array to be focused and input to one of the optical fibers with the gradually-changed refractive index, are output to the collimating lens array of the receiving mechanism from the other end of the optical fiber with the gradually-changed refractive index for collimation, and then are input to the wavelength filter opposite to the part of the collimating lens array, and the laser signals consistent with the working wavelength of the wavelength filter pass through the wavelength filter and pass through the second coupling lens array, and the laser signals which are inconsistent with the working wavelength of the wavelength filter are reflected to a reflector opposite to the wavelength filter, the laser signals are reflected to the second coupling lens array by the reflector and then enter the corresponding PD receiving unit.

7. A light module arrangement according to claim 1, characterized in that: the first coupling lens array, the focusing lens array, the collimating lens array, the second coupling lens array and the pair of graded-index optical fibers are all made of polycarbonate materials through injection molding.

8. A light module arrangement according to claim 1, characterized in that: it is still including the first packaging mechanism who is used for encapsulating launching mechanism, first packaging mechanism include first base, first apron, first optical fiber splice and a plurality of first screw, the up end of first base be equipped with VCSEL laser instrument, first coupling lens array, focusing lens array and the first profile modeling storage tank that first optical fiber splice structure suited, behind VCSEL laser instrument, first coupling lens array, focusing lens array and first optical fiber splice arrange first profile modeling storage tank in, first apron lid establish at first base up end and through the fixed encapsulation of first screw.

9. A light module arrangement according to claim 1, characterized in that: the optical fiber connector is characterized by further comprising a second packaging mechanism used for packaging the receiving mechanism, the second packaging mechanism comprises a second base, a second cover plate, a plurality of second screws and a second optical fiber connector, a second profiling accommodating groove matched with the collimating lens array, the wavelength filter, the second coupling lens array, the PD photoelectric detector and the second optical fiber connector are formed in the upper end face of the second base, the collimating lens array, the wavelength filter, the second coupling lens array, the PD photoelectric detector and the second optical fiber connector are arranged in the second profiling accommodating groove, and the second cover plate is covered on the upper end face of the second base and fixedly packaged through the second screws.

10. A light module structure according to claim 2, characterized in that: