CN215867239U - Photoelectric communication device - Google Patents

Abstract

The utility model discloses a photoelectric communication device, which comprises an optical fiber and a microlens component; the micro lens component comprises a micro convex lens and a connecting part which is integrally formed with the micro convex lens, and the connecting part is provided with a central shaft and a limit hole corresponding to the optical axis of the micro convex lens; the shape of the limiting hole is matched with the shape of the end part of the optical fiber, and the end part of the optical fiber is inserted into the limiting hole. In the application, the optical fiber is connected with the micro-element convex lens with the light wave converging effect, so that the coupling loss generated by the transmission of optical signals between the silicon optical chip and the optical fiber is reduced; and realize the accurate counterpoint of relative position between the tip of optic fibre and the little first convex lens through spacing hole on the connecting portion, reduce the degree of difficulty of optic fibre and little first convex lens counterpoint equipment. Therefore, the coupling efficiency of the optical fiber and the silicon optical chip can be guaranteed, and the assembling difficulty of devices can be reduced.

Description

Photoelectric communication device

Technical Field

The utility model relates to the technical field of photoelectric communication, in particular to a photoelectric communication device.

Background

With the rapid development of technologies such as optical communication and internet, data transmission and processing speed gradually develops towards the direction of higher speed requirement. Since the silicon optoelectronic device can be integrated with a microelectronic integrated circuit to realize the on-chip optical interconnection with high performance, low cost, small size and high integration level, the silicon-based optoelectronic device becomes one of the popular devices for the research of high-speed optical communication devices. The key of the silicon-based photoelectric chip packaging technology is to realize the coupling connection between an optical signal in a chip and an external optical signal, and the optical signal coupling transmission is carried out between a silicon optical chip and an optical fiber, which is one of the commonly used optical signal coupling communication transmission modes at present.

In the existing technology for realizing optical signal communication by optical signal coupling between a silicon-based optoelectronic device and an optical fiber, the problem of larger coupling loss due to mode field mismatch often occurs. Therefore, how to improve the mode field matching degree between the silicon optical chip and the optical fiber, and further improve the coupling efficiency is one of the problems to be solved in the industry.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a photoelectric communication device, which can improve the coupling efficiency of optical signal transmission between a silicon optical chip and an optical fiber in the photoelectric communication device.

In order to solve the above technical problems, the present invention provides an optoelectronic communication device comprising an optical fiber and a microlens assembly;

the micro lens component comprises a micro convex lens and a connecting part which is integrally formed with the micro convex lens, and a limiting hole with a central shaft corresponding to the optical axis of the micro convex lens is arranged on the connecting part; the shape of the limiting hole is matched with that of the end part of the optical fiber, and the end part of the optical fiber is inserted into the limiting hole; the micro convex lens is fixedly connected with the connecting part.

In an optional embodiment of the present application, the microlens member is an optical member formed by combining a cubic structure and a convex lens structure attached to a side of the cubic structure as an integrally formed structure, and a surface of the cubic structure facing away from one side of the convex lens structure is provided with a blind hole as the limiting hole.

In an optional embodiment of the present application, the blind holes on the light-transmitting structure are hole-shaped structures formed by processing using an MEMS process.

In an optional embodiment of the present application, the number of the optical fibers is plural; the microlens component comprises a plurality of the micro-element convex lenses which are linearly arranged, and each micro-element convex lens is correspondingly provided with one connecting part; each between the infinitesimal convex lens, each between the connecting portion and every be infinitesimal convex lens with correspond be the integrated into one piece structure between the connecting portion.

The utility model provides a photoelectric communication device, which comprises an optical fiber and a microlens component; the micro lens component comprises a micro convex lens and a connecting part which is integrally formed with the micro convex lens, and the connecting part is provided with a central shaft and a limiting hole corresponding to the optical axis of the micro convex lens; the shape of the limiting hole is matched with the shape of the end part of the optical fiber, and the end part of the optical fiber is inserted into the limiting hole; the micro convex lens is fixedly connected with the connecting part.

In the application, it is considered that for the silicon optical chip, the size of the communication end face of the silicon optical chip is limited by the thickness size of the silicon optical chip and is generally smaller than 1um, and the diameter of the cross section of the single-mode optical fiber is generally about 8um to 10um, so that when optical signal coupling transmission is performed between the silicon optical chip and the optical fiber, the coupling loss of the optical signal communication transmission between the silicon optical chip and the optical fiber is usually large due to the size mismatching between the communication end face of the silicon optical chip and the end face of the optical fiber. Therefore, the optical fiber is connected with the micro-element convex lens, and the light wave signal is coupled with the optical signal between the optical fiber and the silicon optical chip on the basis of reducing the size of the light spot of the light wave signal through the light condensation of the micro-element convex lens through the converging effect of the micro-element convex lens on the light wave, so that the coupling loss generated in the transmission process of the optical signal is avoided; on this basis, further consider that the terminal surface and the infinitesimal convex lens etc. of optic fibre all belong to the micron order device, in order to guarantee the tip of optic fibre and the cooperation precision of relative position between the infinitesimal convex lens, further set up the spacing hole corresponding with infinitesimal convex lens on the connecting portion with infinitesimal convex lens integrated into one piece in this application, insert this spacing hole when the tip of optic fibre, direct fixed connection between optic fibre and the infinitesimal convex lens has been realized in other words, too much intermediate junction spare has been avoided, just also simplified the processing and the equipment degree of difficulty of adapting unit between optic fibre and the infinitesimal convex lens and reduced processing cost and assembly cost to a certain extent.

Therefore, the assembling difficulty of the whole device is reduced on the basis of ensuring high-efficiency optical signal coupling between the optical fiber and the silicon optical chip, and the production cost of the device is reduced.

Drawings

In order to more clearly illustrate the embodiments or technical solutions of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

Fig. 1 is a schematic view of the assembly of a microlens assembly and an end of an optical fiber provided in an embodiment of the present application;

FIG. 2 is another schematic diagram of a microlens assembly and fiber end connection provided by an embodiment of the present application;

fig. 3 is an exploded view of an optoelectronic communication device according to an embodiment of the present disclosure;

fig. 4 is a schematic assembly structure diagram of an optoelectronic communication device according to an embodiment of the present application.

Detailed Description

In a photoelectric communication device based on a silicon photonic device, coupling transmission of light wave signals between a silicon photonic chip and an optical fiber needs to be realized. And the side surface of the silicon optical chip is also used as a communication end surface for outputting and receiving optical signals. Obviously, the size of the communication end face is limited by the thickness of the silicon optical chip, the thickness of the silicon optical chip is generally within 1um, that is, the silicon optical chip can only receive optical signals with the spot size smaller than 1um, otherwise, optical signals beyond 1um of the spot size are lost; for the optical fiber, the diameter of the end face of the single mode optical fiber for outputting and receiving optical signals is 8 um-10 um, and obviously, for the optical fiber, the size of the light spot of the output optical signal is equivalent to the size of the end face of the optical fiber; therefore, the silicon optical chip can not receive all optical signals directly output from the end part of the optical fiber.

As mentioned above, because the size of the end face of the optical fiber is much larger than the thickness of the silicon optical chip, when the silicon optical chip outputs an optical signal to the optical fiber, if the end face of the silicon optical chip is close enough to the end face of the optical fiber, it is obvious that the optical signal can be well coupled into the optical fiber, otherwise, when the optical fiber outputs an optical signal to the silicon optical chip, because the size of the silicon optical chip is too small, the silicon optical chip cannot completely receive all the optical signals, and further, the coupling efficiency between the silicon optical chip and the optical fiber is low.

Therefore, the technical scheme capable of improving the coupling efficiency between the silicon optical chip and the optical fiber is provided.

In order that those skilled in the art will better understand the disclosure, the utility model will be described in further detail with reference to the accompanying drawings and specific embodiments. It is to be understood that the described embodiments are merely exemplary of the utility model, and not restrictive of the full scope of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 4, fig. 1 is a schematic view illustrating the assembly of a microlens assembly and an optical fiber end provided in an embodiment of the present application, and fig. 2 is another schematic view illustrating the structure of the connection of the microlens assembly and the optical fiber end provided in an embodiment of the present application; fig. 3 is an exploded structure schematic diagram of an optoelectronic communication device provided in the embodiment of the present application, and fig. 4 is an assembled structure schematic diagram of the optoelectronic communication device provided in the embodiment of the present application. The optoelectronic communication device may include:

an optical fiber 2 and a microlens member 3;

the microlens member 3 includes a micro-convex lens 31 and a connecting portion 32 integrally formed with the micro-convex lens 31; the connecting part 32 is provided with a limiting hole 321 with a central axis corresponding to the optical axis of the micro convex lens 31, the shape and the size of the limiting hole 321 are matched with the shape and the size of the end part of the optical fiber 2, and the end part of the optical fiber 2 is inserted into the limiting hole 321; the micro convex lens 31 and the connecting part 32 are fixedly connected,

take the optical signal communication between the photoelectric communication device and the silicon optical chip as an example;

the microlens component 3 is arranged between the silicon optical chip 1 and the optical fiber 2;

the communication end face 11 of the silicon optical chip 1 is located on the side opposite to the micro convex lens 31, so that an optical signal path is formed among the communication end face 11 of the silicon optical chip 1, the micro convex lens 31 and the end face of the optical fiber 2.

It should be noted that the low coupling efficiency of the optical signal between the silicon optical chip 1 and the optical fiber 2 is caused by the fact that the size difference between the communication end face 11 of the silicon optical chip 1 and the end face of the optical fiber 2 is large, and the size of the communication end face 11 of the silicon optical chip 1 and the size of the end face of the optical fiber 2 respectively determine the maximum spot size of the optical signal that can be transmitted, so that the spot sizes of the optical signals that can be transmitted by the two optical chips are not matched, and the coupling efficiency is low. To improve the coupling efficiency between the silicon optical chip 1 and the optical fiber 2, it is necessary to ensure that the light spot of the optical signal transmitted between the silicon optical chip 1 and the optical fiber 2 is modulated to a size at which both the silicon optical chip 1 and the optical fiber 2 can almost completely receive coupling.

For this reason, in the present application, it is considered that the microlens assembly 3 is disposed between the silicon optical chip 1 and the optical fiber 2, wherein the microlens assembly 3 includes the micro-element convex lens 31, and based on the light condensing action of the micro-element convex lens 31, the optical signal output from the end of the optical fiber 2 can be condensed first by the light condensing action of the micro-element convex lens 31, so that the size of the light spot corresponding to the optical signal output from the end of the optical fiber 2 is reduced to a large extent, and then the condensed optical signal is coupled into the silicon optical chip 1. Because the light wave signal passes through the convergence effect of the micro convex lens 31, the light spot size is reduced, and the light wave signal can be better matched with the size of the communication end face 11 of the silicon optical chip 1, so that the coupling efficiency of the light signal coupled into the silicon optical chip 1 is improved.

When the silicon optical chip 1 couples the optical signal into the optical fiber 2, since the light spot size of the optical signal output by the silicon optical chip 1 is smaller than that of the optical fiber 2, as long as the alignment between the silicon optical chip 1 and the optical fiber 2 is accurate, the problem of low coupling efficiency does not exist, and thus the coupling efficiency of the optical signal is further improved after the light is condensed by the micro convex lens 31.

Based on optical common knowledge, in order to realize optical signal coupling between the silicon optical chip 1 and the optical fiber 2, an optical signal path needs to be formed between the communication end face 11 of the silicon optical chip 1 and the end face of the optical fiber 2. It is apparent that to form this optical signal path, the relative position between the convex microlens 31 and the end of the optical fiber 2 needs to satisfy a certain alignment accuracy. However, for the optical fiber 2 and the silicon optical chip 1, both belong to micron-scale devices, the corresponding micro convex lens 31 corresponding to each optical fiber should also be a micron-scale lens, and it is obviously difficult to mount the micro convex lens 31 and the optical fiber end face in a fixed manner, that is, the micro convex lens 31 and the optical fiber end face need to be precisely aligned with each other, that is, the micro convex lens and the optical fiber end face need to be precisely aligned with each other. For this purpose, the present application further provides a limiting hole 321 for accommodating and arranging the end of the optical fiber on the connecting portion; the direction of the arrow shown in fig. 1 is the direction in which the end of the optical fiber is inserted into the stopper hole 321.

Meanwhile, the connecting portion 32 and the micro convex lens 31 are integrally formed, the connecting portion 32 is provided with a limiting hole 321 corresponding to the micro convex lens 31, and the end portion of the optical fiber 2 can be inserted into the limiting hole 321, so that the relative position between the micro convex lens 31 and the end portion of the optical fiber is fixed. Therefore, accurate alignment of the relative position between the micro convex lens 31 and the optical fiber end part is realized, the relative position between the micro convex lens 31 and the limiting hole 321 on the connecting part 32 is directly set reasonably, on the basis, the connecting part 32 is assembled through the limiting hole 321 and the optical fiber end part, accurate alignment installation of the relative position between the micro convex lens 31 and the optical fiber end part is also realized, the relative position between the micro convex lens 31 and the optical fiber end part is not required to be adjusted repeatedly when the micro convex lens 31 and the optical fiber end part are assembled, and accordingly the alignment installation difficulty between the optical fiber end part and the micro convex lens 31 is reduced to a great extent.

It should be noted that, the convex lens 31 and the connecting portion 32 may be in a split structure, for example, the connecting portion 32 may be a component that one side can be embedded with the convex lens 31 and the other side can be embedded with the end of the optical fiber, for example, an annular frame matched with the convex lens in shape may be disposed on one side of the connecting portion 32, a limiting hole 321 matched with the end of the optical fiber may be disposed on the other side, and a symmetric central axis of the annular frame should coincide with a symmetric central axis of the limiting hole 321. The space in the annular frame and the limiting hole 321 can be communicated with each other, and a light-transmitting medium layer can also be arranged between the space in the annular frame and the limiting hole. When the convex microlens 31 and the end of the optical fiber 2 are nested with the connector, respectively, the aligned assembly between the convex microlens 31 and the end of the optical fiber is achieved.

However, it is obvious that this kind of connection structure needs to process more limit connection structures on the connection portion 32, and two positions connecting the optical fiber 2 and the micro convex lens 32 also need to be aligned precisely, and need to realize the assembly of more parts, which increases the difficulty and cost of processing and assembly to a certain extent.

Therefore, in the embodiment, the limiting hole for connecting the optical fiber is processed and formed on the connecting piece integrally formed by the micro lens,

the method is equivalent to directly realizing the fixed connection between the micro lens and the optical fiber, further realizing the relative alignment between the micro lens and the end part of the optical fiber, simplifying the connection structure of the alignment connection between the optical fiber and the micro convex lens, and reducing the difficulty and the cost of processing and assembling.

In order to make the optical signal channel between the silicon optical chip and the optical fiber have higher coupling efficiency for transmitting the optical signal, a certain relative position relationship needs to be satisfied between the micro convex lens 31 and the end portion of the optical fiber, and a certain position relationship also needs to be satisfied between the micro convex lens 31 and the communication end surface 11 of the silicon optical chip 1. The mode similar to the alignment between the micro convex lens 31 and the end of the optical fiber can also be adopted, and the micro convex lens 31 and the silicon optical chip 1 are respectively connected through a connecting part, so that the accurate alignment of the relative position relationship between the micro convex lens 31 and the silicon optical chip 1 is realized.

To sum up, in the optoelectronic communication device in the present application, in order to improve the coupling efficiency of transmitting optical signals between the silicon optical chip and the optical fiber, a microlens assembly including a micro-element convex lens is additionally disposed between the silicon optical chip and the optical fiber, and the optical signals transmitted between the optical fiber and the silicon optical chip are converged by using the light-gathering effect of the micro-element convex lens, thereby solving the problem of low coupling efficiency of optical signals caused by the mismatch of the thickness dimension of the silicon optical chip and the dimension between the end diameters of the optical fibers; and on the basis, the relative position alignment installation difficulty between the optical fiber end part and the infinitesimal convex lens is considered to be large, and the accurate alignment between the optical fiber end part and the infinitesimal convex lens is further realized through the connecting piece, so that the installation difficulty of the optical fiber end part and the infinitesimal convex lens is reduced on the basis of ensuring the alignment installation accuracy between the optical fiber end part and the infinitesimal convex lens. Therefore, the photoelectric communication device can ensure the optical signal coupling efficiency between the silicon optical chip and the optical fiber and avoid the problem of high installation difficulty.

Based on any of the above embodiments, in order to describe the connection structure between the convex microlens 31, the end face of the optical fiber, and the connection portion 32 in more detail, a more specific embodiment will be described below.

Taking the example that the optical signal between the optical fiber 2 and the silicon optical chip 1 is transmitted along a substantially straight optical path, the central axis of the end face of the optical fiber needs to coincide with the optical axis of the convex lens 31 and be perpendicular to the end face of the optical fiber and the communication end face 11.

The assembly difficulty is relatively large to realize the coincidence of the central axis of the end of the optical fiber and the optical axis of the micro convex lens 31. For this purpose, the micro convex lens 31 is further connected to the connecting portion 32, and the connecting portion 32 is provided with a limiting hole 321, and the end of the optical fiber 2 can be inserted into the limiting hole 321.

In an alternative embodiment of the present application, the microlens member 31 is an optical member formed by combining a cubic structure and a convex lens structure attached to a side of the cubic structure as an integrally molded structure, and a surface of the cubic structure on a side facing away from the convex lens structure is provided with a blind hole as the limiting hole 321.

Referring to fig. 1, the microlens assembly 3 in fig. 1 can be generally regarded as an integrally formed three-dimensional structure formed by splicing a convex lens structure formed by a partial sphere and a cubic structure, the three-dimensional structure is a light-transmitting part, obviously, the partial sphere of the light-transmitting part is also equivalent to the micro-element convex lens 31, and the cubic structure is also equivalent to a connecting part, a blind hole is arranged at the center position of one side of the cubic structure, which is far away from the convex lens structure, and the blind hole is also equivalent to the limiting hole 321 matched with the end part of the optical fiber. When the end of the optical fiber is inserted into the limiting hole 321, obviously the central axis of the limiting hole 321 coincides with the central axis of the convex lens structure, so that the alignment installation between the end of the optical fiber and the convex lens 31 of the infinitesimal lens can be realized, the relative position between the end of the optical fiber and the convex lens of the infinitesimal lens does not need to be debugged repeatedly, and the difficulty of accurate alignment during the assembly between the end of the optical fiber and the convex lens of the infinitesimal lens is reduced.

In addition, for the cubic structure, only the portion of the light path from the limiting hole 321 to the convex microlens 31 may be formed of a light-transmitting material, and other portions may be light-transmitting or light-proof, which is not limited in this application.

As described above, the embodiment shown in fig. 1 is an embodiment in which the optical signal between the silicon optical chip 1 and the optical fiber 2 is transmitted along a substantially straight optical path. In practical applications, the optical path between the communication end face 11 of the silicon optical chip 1 and the optical fiber end face of the optical fiber 2 may also be a deflected optical signal channel, depending on the installation space requirement or other reasons.

As shown in fig. 2, the microlens member 3 shown in fig. 2 can be regarded as an integrally molded three-dimensional structure formed by splicing a convex lens structure formed by a partial sphere and a right-angled triangular prism, and the integrally molded three-dimensional structure is also a light-transmitting member. Except that the oblique surfaces of the right triangular prism parts in the three-dimensional structure are provided with light reflecting film layers. One right-angled surface of the right-angled triangular prism thus fits a partial sphere equivalent to the micro-convex lens 31, while the other right-angled surface is provided with a blind hole, that is, a stopper hole 321 for inserting the end of the optical fiber. The straight line where the symmetric central axis of the blind hole and the symmetric central axis of the infinitesimal convex lens 31 are located passes through the center of the oblique surface of the right-angle triangular prism, and the two symmetric central axes are perpendicular to each other, so that an optical signal output from the end of the optical fiber can be incident into the infinitesimal convex lens 32 through the reflection action of the reflection film layer of the oblique surface, and the transmission path of the optical path can refer to the arrow direction in fig. 2.

As can be understood from fig. 2, the optical signal path between the optical fiber 2 and the silicon optical chip 1 can be realized by deflecting the optical signal path between the communication end surface 11 of the silicon optical chip 1 and the end surface of the optical fiber 2 at a 90-degree right angle based on the oblique surface reflection action of the right triangular prism in the microlens assembly 3. The conventional knowledge of the transmission of light waves can be determined by properly arranging the shape structure of the microlens member 3 or adding some other optical elements in the optical path that can deflect the optical path. The optical signal path between the optical fiber end face and the silicon optical chip 1 has certain angle of deflection, and the optical signal transmission between the silicon optical chip 1 and the optical fiber 2 in the application can not be influenced.

Fig. 2 shows an embodiment in which the optical path between the communication end face 11 of the silicon optical chip 1 and the end face of the optical fiber 2 is deflected when the micro convex lens 31 and the connecting portion 32 are integrally formed. Other optical elements may be disposed between the communication end face 11 and the optical fiber end face based on practical application requirements, and this is not particularly limited in this application.

In addition, the above-mentioned convex microlens 31 shown in fig. 1 and fig. 2 has a structure corresponding to a light transmission structure of a partial sphere, that is, the convex microlens 31 may have a lens structure with central symmetry. In practice, however, the silicon photonics chip 1 is limited in its light coupling efficiency by its small dimension, mainly in the thickness direction. Therefore, in practice, when the light wave signals output from the end of the optical fiber 2 are converged by the convex microlens 31, the convex microlens 31 having a partial cylindrical structure which is symmetrical with respect to the axis may be considered, that is, the convex curved surface of the convex microlens 31 is a partial cylindrical side curved surface. Obviously, when the relative regulation between the micro-element convex lens 31 and the silicon optical chip 1 is installed, the symmetry axis of the micro-element convex lens 31 should be parallel to the communication end surface 11 of the silicon optical chip 1 and perpendicular to the thickness direction of the silicon optical chip 1.

As described above, for the micro convex lens 31, which belongs to a lens structure of micron order, it is obvious that the connection portion 32 and the limiting hole 321 on the connection portion 32 also need to be set to have a size of micron order. Therefore, the stopper hole 321 is formed in the connecting portion 32, which is also a micro-scale fine process.

For this reason, in an alternative embodiment of the present application, the limiting hole 321 on the connecting portion 32 may be formed by using a MEMS process, so as to ensure the precision of the limiting hole 321.

In addition, when the end of the optical fiber is inserted into the limiting hole 321 for fixing and installation, a small amount of glue can be filled in the limiting hole 321, and the end of the optical fiber and the connecting part 32 can be fastened and connected through ultraviolet irradiation and curing.

In addition, in the present application, the connecting portion 32 is provided with a limiting hole 321 for accommodating the end portion of the optical fiber, and the connecting portion 32 and the convex microlens 31 are fixedly connected to form the microlens assembly 3, so as to realize the alignment assembly of the relative position between the convex microlens 31 and the end portion of the optical fiber. The relative position between the micro-convex lens 31 and the silicon optical chip 1 also needs to be aligned with a certain precision.

In practical application, it can be considered to set components similar to the intermediate connecting member, and the installation positions of the micro convex lens 31 and the silicon optical chip 1 are limited and fixed, so that accurate alignment of the micro convex lens 31 relative to the communication end surface 11 of the silicon optical chip 1 is ensured, and good optical signal coupling efficiency between the silicon optical chip 1 and the optical fiber 2 is ensured.

In an alternative embodiment of the present application, further considering that the silicon microchip 1 is generally fixedly mounted on the silicon substrate 4, for this purpose, a first limiting groove 41 and a second limiting groove 42 may be respectively provided on the silicon substrate 4, the first limiting groove 41 being used for defining the position for mounting the silicon microchip 1, and the second limiting groove 42 being used for defining the mounting position of the microlens assembly 3.

It can be understood that the requirement of coupling the optical path between the silicon optical chip 1 disposed in the first position-limiting groove 41 and the microlens assembly 3 disposed in the second position-limiting groove 42 can be satisfied by properly setting the relative positions between the first position-limiting groove 41 and the second position-limiting groove 42.

In an alternative embodiment of the present application, in order to further ensure the coupling efficiency of the optical signal transmitted between the silicon optical chip 1 and the light 2, the distance between the focal point of the convex microlens 31 in the microlens assembly 3 and the communication end face 11 of the silicon optical chip 1 should be within 5 um.

Obviously, in the embodiment that the first limiting groove 41 and the second limiting groove 42 on the silicon substrate 4 are used to limit and fix the relative positions of the silicon optical chip 1 and the microlens component 3, the arrangement of the distance between the convex microlens 31 and the communication end face 11 of the silicon optical chip 1 between 5um can be realized by reasonably setting the relative distance between the first limiting groove 41 and the second limiting groove 42.

In addition, adopt first spacing groove 41 and second spacing groove 42 with silicon optical chip 1 and the fixed setting of microlens part 3 on silicon substrate 4, also can reduce the whole thickness of the part that silicon optical chip 1, microlens part 3 and silicon substrate 4 constitute to a certain extent for this thickness is about 200um, is favorable to whole photoelectric communication device's miniaturization.

Of course, it is understood that the present application does not exclude other embodiments in which other mechanisms for limiting the mounting positions of the silicon microchip 1 and the microlens assembly 3, respectively, are directly provided on the silicon substrate 4. Or if the fixing and mounting precision of the silicon optical chip 1 and the microlens component 3 can meet the requirement, the technical scheme of the application can be realized by directly controlling the silicon optical chip 1 and the microlens component 3 to be fixedly mounted at a reasonable relative position without adopting a limiting component.

In the optoelectronic communication device, the silicon substrate 4 is further mounted on the PCB 5, so that the silicon optical chip 1 is connected to the circuit on the PCB 5. For this reason, in an alternative embodiment of the present application, the PCB board 5 may be further provided with a third limiting groove 51, whereby the silicon substrate 4 may be mounted and disposed in the third limiting groove 51, which may further reduce the thickness of the entire optoelectronic communication device.

In order to improve the assembly precision of the whole photoelectric communication device, the first limiting groove 41, the second limiting groove 42 and the third limiting groove 43 can be processed by adopting an MEMS (micro electro mechanical systems) process, when the silicon optical chip 1, the microlens component 3 and the silicon substrate 4 are respectively arranged in the first limiting groove 41, the second limiting groove 42 and the third limiting groove 43, the bonding connection can be realized by a glue filling mode, and a certain thickness can be compensated by glue when the depth of the limiting grooves is too large.

Based on the above embodiments, in the practical application process, each silicon optical chip 1 generally needs to perform optical signal communication with a plurality of optical fibers 2 at the same time, the end portions of the optical fibers 2 may be arranged in a linear array, and the arrangement direction is parallel to the length direction of the long and narrow communication end surface 11 of the silicon optical chip 1. In order to further simplify the mounting between the microlens assembly 3 and the fiber end, in an alternative embodiment of the present application, it may further comprise:

the microlens assembly 3 includes a plurality of convex microlenses 31 arranged linearly, and each convex microlens 31 is connected with a connecting portion 32; the respective convex microlenses 31, the respective connecting portions 32, and the convex microlenses 31 and the connecting portions 32 are integrally formed.

Referring to fig. 1, the microlens member 3 in this embodiment has a plurality of curved convex surfaces linearly arranged on one side surface, and a plurality of blind holes respectively corresponding to the curved convex surfaces, the blind holes being the limiting holes 321 for disposing the ends of the optical fibers, and the curved convex surfaces being the optical interfaces of the respective microlens.

Each infinitesimal convex lens 31, each connecting part 32 and the infinitesimal convex lens 31 and the connecting part 32 in the embodiment are integrally formed, so that the mutual assembly of the infinitesimal convex lens 31 and the connecting part 32 is reduced, and the overall assembly difficulty of the photoelectric communication device is reduced to a great extent.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Furthermore, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include elements inherent in the list. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element. In addition, parts of the above technical solutions provided in the embodiments of the present application, which are consistent with the implementation principles of corresponding technical solutions in the prior art, are not described in detail so as to avoid redundant description.

The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

Claims (4)

1. An optoelectronic communication device comprising an optical fiber and a microlens assembly;

the micro lens component comprises a micro convex lens and a connecting part which is integrally formed with the micro convex lens, and a limiting hole with a central shaft corresponding to the optical axis of the micro convex lens is arranged on the connecting part; the shape of the limiting hole is matched with that of the end part of the optical fiber, and the end part of the optical fiber is inserted into the limiting hole.

2. The optoelectronic communication device as claimed in claim 1, wherein the microlens member is an optical member formed by combining a cubic structure and a lenticular structure attached to a side of the cubic structure as an integrally molded structure, and a surface of the cubic structure on a side facing away from the lenticular structure is provided with a blind hole as the stopper hole.

3. The optoelectronic communication device of claim 2, wherein the blind holes are hole-like structures formed by MEMS processing.

4. The optoelectronic communication device of claim 1, wherein the number of the optical fibers is plural; the microlens component comprises a plurality of the micro-element convex lenses which are linearly arranged, and each micro-element convex lens is correspondingly provided with one connecting part; each between the infinitesimal convex lens, each between the connecting portion and every be infinitesimal convex lens with correspond be the integrated into one piece structure between the connecting portion.

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