WO2016155381A1

WO2016155381A1 - Integrated multi-path optical lens array assembly for parallel optical transceiver module

Info

Publication number: WO2016155381A1
Application number: PCT/CN2015/099428
Authority: WO
Inventors: 张尔康; 徐红春; 王雨飞; 曹芳
Original assignee: 武汉电信器件有限公司
Priority date: 2015-04-03
Filing date: 2015-12-29
Publication date: 2016-10-06
Also published as: CN104765110A

Abstract

An integrated multi-path optical lens array assembly for a parallel optical transceiver module is used for abutment with an MT optical fibre connector (2), and comprises a lens base (1) and three groups of lens arrays (A1-A12, B1-B12 and C1-C12), the two sides of the butt-joint end of the lens base (1) which abuts the MT optical fibre connector (2) being each respectively provided with a hook clip (11); two metal guide pins (12) are provided inside the lens base (1), the two metal guide pins (12) both protrude beyond the butt-joint end surface of the lens base (1) which abuts the MT optical fibre connector (2), and the metal guide pins (12) are fixedly connected to the MT optical fibre connector (2); the three groups of lens arrays are respectively lens arrays A (A1-A12), lens arrays B (B1-B12) and lens arrays C (C1-C12), wherein the lens arrays B (B1-B12) are located on the butt-joint end surface, and the lens arrays A (A1-A12) and the lens arrays C (C1-C12) are located at the same side of the lens base (1); an optical interface A, an optical interface B and an optical interface C are provided inside the lens base (1). The integrated multi-path optical lens array assembly for a parallel optical transceiver module connects firmly to the MT optical fibre connector (2), has a simple post manufacturing process, and is suitable for mass production, so that the yield can be effectively improved and costs reduced.

Description

Integrated multiplex optical lens array assembly for parallel optical transceiver modules

Technical field

The invention belongs to the field of optical communication and relates to an integrated multi-path optical lens array assembly for a parallel optical transceiver module.

Background technique

With the full spread of the information industry, the global data center is experiencing explosive growth, and the global data center is in full swing. Parallel optical modules have been favored by the industry due to their large communication capacity and low energy consumption, and have developed rapidly in recent years. Parallel optical modules refer to one-to-one transmission of multi-channel lasers and multi-channel detectors in multiple modules through multiple fibers. The low power consumption of device integration and miniaturization allows parallel optical modules to generate and dissipate much less heat than multiple discrete devices. Parallel optical modules rely primarily on high-density integration of optics.

QSFP (Quad Small Form-factor Pluggable 4x10G hot-swappable optical transceiver module), CXP (120Gb/s 12x Small Form-factor Pluggable 12x10G hot-swappable optical transceiver module) is designed to meet the market demand for high-density high-speed pluggable solutions A fiber optic solution born out of demand, QSFP, CXP interfaces are widely used: switches, routers, host adapter bus, enterprise storage, high-density, high-speed I / O and multi-channel interconnect. The QSFP 4-channel pluggable interface has a transfer rate of up to 40 Gbps and supports four channels at 10 Gbps per channel at the same port size of the XFP (10G Small Form Factor Pluggable, 10G single-channel hot-swappable optical transceiver module). Data transmission, so the transmission density of QSFP can reach 4 times that of XFP products and 4 times that of SFP+ products.

The existing QSFP SR4 short-distance transmission module integrates four-way transmission and four-way reception, and the optical port is realized by a standard 12-core MPO (Multi-fiber PullOff multimode fiber connector) standard array fiber. The VECSEL laser dies are surface-emitting, and the exit beam and the incident light are deflected by 90 degrees. The current common solution is to use the lens to realize the optical path deflection. In order to realize the optical signal transmission from the laser through the lens to the optical fiber, one end is required. The fiber array of the MT optical interface is coupled to the lens array.

The existing coupling method is passively aligned with the guide hole on the fiber joint of the MT (mechanical butt transmission multi-core connector (usually 12 core)) through the plastic guide pin on the lens base, and then glue or other machinery The method fixes the MT fiber connector to the lens base. Because the plastic guide pin has low strength and length cannot be made long, and the existing lens base itself cannot be fixed with the MT fiber joint, the fixing between the lens base and the MT fiber joint is not stable, and the later adhesive process is also complicated.

It is therefore necessary to design an integrated multiplexed optical lens array assembly for a parallel optical transceiver module to overcome the above problems.

technical problem

SUMMARY OF THE INVENTION The object of the present invention is to overcome the deficiencies of the prior art and to provide an integrated multi-path optical lens array assembly for a parallel optical transceiver module that is firmly connected and has a simple post-production process.

Technical solution

The invention provides an integrated multi-path optical lens array assembly for a parallel optical transceiver module for docking with an MT fiber connector, comprising a lens base and three sets of lens arrays disposed inside the lens base, the lens base A hook is disposed on each side of the mating end of the mating end of the MT fiber connector; two metal guide pins are disposed inside the lens base, and two metal guide pins protrude from the lens base and the MT fiber joint a docking end face, the metal pin is fixedly connected to the MT fiber connector when the lens base is docked with the MT fiber connector; the three lens arrays are an A lens array, a B lens array, and a C lens array The B lens array is located on the butt end face, the A lens array and the C lens array are located on the same side of the lens base; the lens base is internally provided with an A optical interface, a B optical interface, and a C optical interface. Wherein, the A-optical interface total reflection critical angle is less than 45°.

Further, the lens base is made of optical plastic.

Further, two through-holes are formed in the lens base, and the two metal guide pins are respectively inserted into the through-holes.

Further, the A lens array, the B lens array, and the C lens array each include 4-12 lenses.

Further, the lens has a face shape of a spherical shape or an aspherical shape.

Further, the two hooks are symmetrically disposed and are fastened on opposite sides of the MT fiber connector. Further, the lens base is integrally formed with three sets of lens arrays.

Beneficial effect

Compared with the conventional QSFP parallel transmission optical component, the integrated multi-channel optical lens array assembly for parallel optical transceiver module provided by the invention has the following beneficial effects: the metal guide pin makes the connection between the lens base and the MT fiber connector more firm; The hook can be used to clamp the MT fiber connector, so there is no need to use the clamp fixture and the MT fiber connector in the subsequent dispensing process and the glue curing process, which simplifies the process and improves the product reliability; the solution is simple and easy, and is suitable for mass production. Can effectively improve the yield and reduce costs.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any creative work.

FIG. 1 is an integrated multi-channel optical lens array group for a parallel optical transceiver module according to an embodiment of the present invention;

Assembly drawing of the piece;

2 is an integrated multi-path optical lens array group for a parallel optical transceiver module according to an embodiment of the present invention.

An exploded view of the piece;

FIG. 3 is an integrated multi-path optical lens array group for a parallel optical transceiver module according to an embodiment of the present invention.

The first perspective application diagram of the piece;

4 is an integrated multi-path optical lens array group for a parallel optical transceiver module according to an embodiment of the present invention.

a second perspective application diagram of the piece;

FIG. 5 is a third perspective application diagram of an integrated multi-path optical lens array assembly for a parallel optical transceiver module according to an embodiment of the present invention.

Embodiments of the invention

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

As shown in FIG. 1 to FIG. 5, an embodiment of the present invention provides an integrated multi-path optical lens array assembly for a parallel optical transceiver module for docking with an MT fiber connector 2, including a lens base 1 and a lens base. 1 internal three sets of lens arrays. The lens mount 1 is made of optical plastic. The transmittance of the three sets of lens arrays all meet the requirements of the QSFP package. The lens base 1 is integrally formed with three sets of lens arrays, that is, processed by injection molding.

As shown in FIG. 1 to FIG. 5, a hook 11 is disposed on each side of the mating end of the lens base 1 and the MT fiber connector 2, and in the preferred embodiment, the two hooks 11 are symmetrically disposed. And being fastened to opposite sides of the MT fiber connector 2. The connection between the lens base 1 and the MT fiber connector 2 is stabilized, that is, the integrated multi-channel optical lens array assembly for the parallel optical transceiver module is ensured to be connected with the MT fiber. The connection of the head 2 is stable, thereby ensuring stable optical path transmission between the three sets of lens arrays and the mating connector.

As shown in FIG. 1 to FIG. 5, the lens base 1 is internally provided with two metal guide pins 12, and the two metal guide pins 12 are respectively protruded from the mating end faces of the lens base 1 and the MT fiber joint 2; When the lens base 1 is docked with the MT fiber connector 2, the metal pin 12 is connected and fixed to the MT fiber connector 2. In the preferred embodiment, the lens base 1 is provided with two through holes, and the two metal guide pins 12 are respectively inserted into the through holes. The size of the metal guide pin 12 meets the requirements for universal MT connector switching. The metal guide pin can effectively solve the problem of low strength and low hardness of the plastic guide pin, and at the same time ensure the stability of the connection between the two.

As shown in FIGS. 1 to 5, the three sets of lens arrays are an A lens array (hereinafter referred to as A1-A12), a B lens array (hereinafter referred to as B1-B12), and a C lens array (hereinafter referred to as C1-C12). The B lens array is located on the butt end face, and the A lens array and the C lens array are located on the same side of the lens base 1. The A lens array includes 4-12 lenses, the B lens array includes 4-12 lenses, and the C lens array includes 4-12 lenses. The lens has a spherical shape or a non-spherical shape, and functions as a beam shaping to ensure coupling efficiency.

As shown in FIG. 1 to FIG. 5 , the lens base 1 is internally provided with an A optical interface, a B optical interface and a C optical interface, wherein the A optical interface total reflection critical angle is less than 45°. Since the critical angle of total reflection of the A optical interface is less than 45°, the optical interface a is totally reflected by the incident light of 45°, thereby realizing the optical path bending function. Each optical interface is directly formed directly inside the lens base 1. The B optical interface faces the B lens array, the A lens array is located directly below the A optical interface, and the C lens array is located directly below the C optical interface.

The present invention is a specific example of a QSFP 40 Gbps module package (four-way transmission, four-way reception) in which the incident light energy is 1:1 divided. As shown in FIG. 3 and FIG. 4, B1-B4 are lenses corresponding to multimode fiber E1-E4 of MT adapter (referring to MT fiber connector 2), and B9-B12 is corresponding to multimode fiber E9-E12 of MT adapter. lens. As shown in FIG. 4, A1-A4 are lenses of the VCSEL chip array end, and A9-A12 are lenses of the PD array end. As shown in FIG. 5, C1-C4 are lenses of the linear array end of the MPD chip. The principle of the light emitting part: the VCSEL chip emits light with a divergence angle of 20-30°, which is shaped into parallel light after being shaped by the A1-A4 lens, and the optical path is bent by the A optical interface reflection, and then realized by the transflective glass. Light energy segmentation. The reflected light energy portion is focused by the lenses B1-B4 and coupled into the MPD, and the transmitted light energy portion is focused by the lenses C1-C4 and coupled into the E1-E4 channels of the multimode fiber of the MT connector. Light receiving part principle: MT adapter The transmitted light in the E9-E12 multimode fiber is shaped into parallel light by the C9-C12 lens, and the optical path is bent by the A optical interface reflection. The parallel light is then coupled into the PD chip array through the lens A9-A12.

The invention discloses an optical lens array and a lens holder assembly. The integrated body can be processed by model injection molding, and integrates a plurality of collimating lens functions, and provides a cooperation scheme of a lens and an MT fiber joint. Compared with the conventional QSFP parallel transmission optical component, the integrated multi-channel optical lens array assembly for parallel optical transceiver module provided by the invention has the following beneficial effects: the metal guide pin makes the connection between the lens base and the MT fiber connector more firm; The hook can be used to clamp the MT fiber connector, so there is no need to use the clamp fixture and the MT fiber connector in the subsequent dispensing process and the glue curing process, which simplifies the process and improves the product reliability; the solution is simple and easy, and is suitable for mass production. Can effectively improve the yield and reduce costs.

The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., which are included in the spirit and scope of the present invention, should be included in the present invention. Within the scope of protection.

Claims

An integrated multiplex optical lens array assembly for a parallel optical transceiver module for docking with an MT fiber connector, comprising: a lens base and three sets of lens arrays disposed inside the lens base, the lens a hook is disposed on each side of the butt end of the base and the MT fiber connector;

Two metal guide pins are disposed inside the lens base, and the two metal guide pins are respectively protruded from the mating end faces of the lens base and the MT fiber connector. When the lens base is docked with the MT fiber connector The metal guide pin is fixedly connected to the MT fiber joint;

The three sets of lens arrays are respectively an A lens array, a B lens array and a C lens array, the B lens array is located on the butt end face, and the A lens array and the C lens array are located on the same side of the lens base; The lens base is internally provided with an A optical interface, a B optical interface and a C optical interface, wherein the A optical interface total reflection critical angle is less than 45°.
The integrated multiplexed optical lens array assembly for a parallel optical transceiver module according to claim 1 wherein said lens mount is made of optical plastic.
The integrated multiplex optical lens array assembly for a parallel optical transceiver module according to claim 1 or 2, wherein: two through-holes are formed in the lens base, and the two metal guide pins are respectively inserted It is placed in the through hole.
The integrated multiplex optical lens array assembly for a parallel optical transceiver module according to claim 1, wherein said A lens array, said B lens array, and said C lens array each comprise 4-12 lenses .
The integrated multiplex optical lens array assembly for a parallel optical transceiver module according to claim 4, wherein the lens has a spherical shape or a non-spherical shape.
The integrated multiplex optical lens array assembly for a parallel optical transceiver module according to claim 1, wherein the two hooks are symmetrically disposed and fastened to opposite sides of the MT fiber connector.
The integrated multiplex optical lens array assembly for a parallel optical transceiver module according to claim 1, wherein the lens base is integrally formed with three sets of lens arrays.