CN211293378U

CN211293378U - Transmit-receive lens and single-channel active optical cable

Info

Publication number: CN211293378U
Application number: CN202020136313.0U
Authority: CN
Inventors: 杨震; 周新桃; 彭鑫; 曾小军
Original assignee: Yangtze Optical Fibre and Cable Co Ltd
Current assignee: Yangtze Optical Fibre and Cable Co Ltd
Priority date: 2020-01-21
Filing date: 2020-01-21
Publication date: 2020-08-18
Anticipated expiration: 2030-01-21

Abstract

The utility model discloses a receive and dispatch unification lens and single channel active optical cable. The lens is provided with an integrally formed lens body base body, the lens body base body is provided with an optical fiber end lens, an optical attenuation section and an optical device end lens on a light path, the optical fiber end lens is provided with optical fiber coupling interfaces which are arranged in parallel from left to right, the optical device end lens is provided with an emitting end face and a receiving end face which are arranged in parallel from left to right, the emitting end face, the optical attenuation section and the optical fiber coupling interface on the corresponding side form an emitting channel, and the receiving end face, the optical attenuation section and the optical fiber coupling interface on the corresponding side form a receiving channel. The active optical cable comprises the receiving-transmitting lens, the laser, the optical detector and the optical fiber input/output port. The utility model replaces the lens which is separated by the transmitting end and the receiving end in the existing module with the lens which integrates the transmitting and receiving, and reduces the die sinking cost and the material cost in the research and development link of the single-channel active optical module; the equipment utilization rate and the efficiency of operators are improved in the production link.

Description

Transmit-receive lens and single-channel active optical cable

Technical Field

The utility model belongs to the optical communication field, more specifically relates to a receiving and dispatching unification lens and single channel active optical cable.

Background

The active optical cable is composed of integrated photoelectric devices, is used for transmission equipment for high-speed and high-reliability mutual transmission in data centers, high-performance computers, large-capacity memories and other equipment, generally meets an electric interface of an industrial standard, and performs data transmission by internal electric-optical-electric conversion and using the superior performance of the optical cable. With the rapid development of data centers and the field of cloud computing, the demand of active optical cable modules in optical communication increases in a geometric manner, wherein the single-channel active optical cable module is particularly prominent.

However, the lens at the transmitting end and the lens at the receiving end of the existing single-channel active optical cable module need to be opened and customized, due to the problems of cost and capacity of opening the mold, the capacity and the input-output ratio of the single-channel active optical cable module are greatly limited, the capacity of the optical module is improved, the cost is reduced, the bottleneck is formed, new transmitting and receiving lenses and optical schemes need to be designed, the cost of opening the mold of the lens is reduced, the assembly time is shortened, the production efficiency is improved, and the maximization of the input-output ratio is realized.

SUMMERY OF THE UTILITY MODEL

To the above defect of prior art or improve the demand, the utility model provides a receiving and dispatching unification lens and single channel active optical cable, its aim at is through the lens that will launch, receive lens adoption integrated design replace to thereby reduce die sinking customization cost, improve assembly efficiency and improve the input-output ratio, solve prior art from this because launching, receive lens need die sinking customization respectively and assemble the limited technical problem of productivity that leads to.

For realizing above-mentioned purpose, according to the utility model discloses an aspect provides a receive and dispatch unification lens, has integrated into one piece's mirror body base member, the mirror body base member has optic fibre end lens, light attenuation section and optical device end lens on the light path, optic fibre end lens has controls the fiber coupling interface that sets up side by side, optic device end lens has controls the emission terminal surface and the receiving end surface that set up side by side, the emission passageway is constituteed to the light attenuation section, the fiber coupling interface of emission terminal surface and corresponding side, receiving end surface and the light attenuation section, the fiber coupling interface of corresponding side constitute receiving passageway.

Preferably, the transmitting optical path and the receiving optical path of the transmitting and receiving lens transmit optical signals independently from left to right.

Preferably, the optical attenuation coefficient of the lens body base of the transmitting/receiving lens is between 0dBm and 10dBm, preferably between 2dBm and 6 dBm.

Preferably, the optical path length of the optical attenuation section of the transmitting and receiving lens is between 1mm and 10mm, preferably between 2mm and 3 mm.

Preferably, the radius of curvature of the transmitting end surface of the transmitting and receiving lens is 0.1 mm-100 mm.

Preferably, the radius of curvature of the receiving end surface of the lens for transmitting and receiving is 0.1mm to 100 mm.

According to another aspect of the present invention, a single-channel active optical cable is provided, which includes the receiving and transmitting lens, the laser, the optical detector, and the optical fiber input/output port provided by the present invention; the transmitting end face of the transmitting-receiving lens is aligned with the laser, and the receiving end face of the transmitting-receiving lens is aligned with the optical detector; the laser is positioned on a chip below the integrated lens on the optical detector.

Preferably, the channel interval between the emitting end face of the integrated unified lens and the photosensitive surface of the laser chip is the same as that between the receiving end face of the integrated unified lens and the photosensitive surface of the photodetector chip.

Preferably, the optical fiber input/output port of the single-channel active optical cable is assembled at the front end of the optical fiber end lens of the transceiver lens to provide an optical port.

Preferably, the optical port of the single-channel active optical cable is an LC type optical port, an MPO type optical port or any one of optical ports with PIN adapter; the PIN needle is a PEI plastic PIN needle or a metal PIN needle.

Generally, through the utility model discloses above technical scheme who conceives compares with prior art, can gain following beneficial effect:

the utility model replaces the lens which is separated by the transmitting end and the receiving end in the existing module with the lens which integrates the transmitting and receiving, and reduces the die sinking cost and the material cost in the research and development link of the single-channel active optical module; the equipment utilization rate and the efficiency of operators are improved in the production link. Especially, the research and development stage has avoided the double cost that the die sinking brought respectively to transmitting terminal lens and receiving terminal lens to and the production phase need aim at twice coupling work that coupling laser instrument and detector brought with transmitting lens and receiving lens respectively, the utility model discloses the cost is reduced and efficiency has been improved simultaneously.

Additionally the utility model discloses a to the length that transmission end and the whole optical scheme power budget of receiving end calculated loss cost design light decay section, divide the decrement on average to the receiving and dispatching both ends, receiving and dispatching end lens just can wholly carry out the dispersion decay like this, has shortened the length of lens light decay section on the one hand to reduce the lens volume, realize that the device is miniaturized, on the other hand has avoided the heat dissipation that current scheme concentrated attenuation leads to concentrate, the technical problem of components and parts ageing with higher speed.

Drawings

Fig. 1 is a schematic structural diagram of a single-channel active optical cable provided by the present invention;

FIG. 2 is a perspective view of a lens for receiving and transmitting light provided by the present invention;

FIG. 3 is a bottom view of a lens for receiving and transmitting

FIG. 4 is a front view of a lens for receiving and transmitting light provided by the present invention;

fig. 5 is a schematic view of the optical path of the lens for receiving and transmitting.

The same reference numbers will be used throughout the drawings to refer to the same or like elements or structures, wherein:

the optical fiber laser device comprises a lens 1, a laser 2, a detector 3, an optical device section lens 11, an optical fiber end lens 12, an optical fiber input/output port 13 and a lens base body 14.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. Furthermore, the technical features mentioned in the embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

The utility model provides a lens 1 is unified in receiving and dispatching, as shown in fig. 2 to 4, have integrated into one piece's mirror base member 14, mirror base member 14 has optical fiber end lens 12, light attenuation section and optical device end lens 11 on the light path, optical fiber end lens 12 has the optical fiber coupling interface that sets up side by side about, optical device end lens 11 has the emission terminal surface and the receiving terminal surface that set up side by side about, the emission terminal surface constitutes emission channel with the light attenuation section, the optical fiber coupling interface of corresponding side, receiving terminal surface constitutes receiving channel with the light attenuation section, the optical fiber coupling interface of corresponding side, as shown in fig. 5; the transmitting channel and the receiving channel transmit optical signals independently from left to right.

The optical attenuation coefficient of the mirror body base 14 is between 0dBm and 10dBm, preferably between 2dBm and 6dBm, and the optical path length of the optical attenuation section is between 1mm and 10mm, preferably between 2mm and 3 mm.

One reason why the conventional lens with separate transmission and reception cannot be integrally molded is that the transmission channel and the reception channel have different lens light attenuations, so that the transmission and reception lens base 14 has different light attenuation coefficients, and cannot be integrally molded by opening the mold, and the mold must be opened separately to meet the requirements of respective optical parameters. And the utility model discloses with the light attenuation dispersion at receiving terminal and transmitting terminal for receive, make a start lens whole carry out the synchronization and the decay of dispersion, adopt the same base member 14 materials, make the integrated into one piece of receiving and dispatching unification lens 1 become possible.

In the preferred scheme, because the attenuation is respectively loaded at the receiving end and the transmitting end, compared with the single attenuation of the existing transmitting end, the attenuation length can be shortened by half or more, the size of the optical module is greatly reduced, the heat dissipation caused by light attenuation is dispersed, and the service life of components is prolonged.

The curvature radius of the emitting end face is 0.1 mm-100 mm.

The curvature radius of the receiving end face is 0.1 mm-100 mm.

Compared with the existing independent lens body, the receiving and transmitting integrated lens body increases the internal space of the lens body, can take different sizes of chips into consideration, such as a laser 2 and a detector 3 with larger sizes or a receiving and transmitting integrated chip, and has more flexibility.

The utility model provides a single-channel active optical cable, as shown in fig. 1, comprising a receiving and transmitting lens 1, a laser 2, a light detector 3 and an optical fiber input/output port 13; the transmitting end face of the transmitting-receiving lens 1 is aligned with the laser 2, and the receiving end face of the transmitting-receiving lens 1 is aligned with the optical detector 3; the laser 2 is positioned on a chip below the integrated unified lens on the optical detector 3, and preferably, the channel interval between the transmitting end surface of the integrated unified lens and the photosensitive surface of the chip of the laser 2 is the same as the channel interval between the receiving end surface of the chip of the optical detector 3. The fiber input/output port 13 is mounted on the front end of the fiber end lens 12 of the transceiver lens, and provides an optical port. The optical port includes but is not limited to an LC type optical port, an MPO type optical port or any optical port with PIN fitting; the PIN needle is a PEI plastic PIN needle or a metal PIN needle.

It will be understood by those skilled in the art that the foregoing is merely a preferred embodiment of the present invention, and is not intended to limit the invention to the particular forms disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.

Claims

1. A lens for receiving and transmitting is characterized by comprising an integrally formed lens body base body, wherein the lens body base body is provided with an optical fiber end lens, an optical attenuation section and an optical device end lens on a light path, the optical fiber end lens is provided with optical fiber coupling interfaces which are arranged in parallel from left to right, the optical device end lens is provided with a transmitting end face and a receiving end face which are arranged in parallel from left to right, the transmitting end face, the optical attenuation section and the optical fiber coupling interface on the corresponding side form a transmitting channel, and the receiving end face, the optical attenuation section and the optical fiber coupling interface on the corresponding side form a receiving channel; the optical attenuation coefficient of the mirror body base body is between 0dBm and 10dBm, and the optical path length of the optical attenuation section is between 1mm and 10 mm.

2. The lens of claim 1, wherein the transmit channel and the receive channel transmit optical signals independently from the left and right.

3. The lens of claim 1, wherein the optical attenuation coefficient of the mirror body base is between 2dBm and 6 dBm.

4. The lens of claim 1, wherein the optical attenuation section has an optical path length of 2mm to 3 mm.

5. The lens of claim 1, wherein the radius of curvature of the emitting end face is 0.1mm to 100 mm.

6. The lens of claim 1, wherein the radius of curvature of the receiving end surface is 0.1mm to 100 mm.

7. A single channel active optical cable comprising the transceiver lens, the laser, the photodetector, and the fiber input/output port of any one of claims 1 to 6; the transmitting end face of the transmitting-receiving lens is aligned with the laser, and the receiving end face of the transmitting-receiving lens is aligned with the optical detector; the laser is positioned on a chip below the integrated lens on the optical detector.

8. The single channel active optical cable of claim 7, wherein the integrated unified lens has an emitting facet that has the same channel spacing as the laser chip photosurface and a receiving facet that has the same channel spacing as the photodetector chip photosurface.

9. The single channel active optical cable of claim 7, wherein the fiber input/output port is mounted at a fiber end lens front end of the transceiver lens to provide an optical port.

10. The single channel active optical cable of claim 9, wherein the optical port is an LC type optical port, an MPO type optical port, or any optical port with PIN fitting; the PIN needle is a PEI plastic PIN needle or a metal PIN needle.