Optical communication system

Abstract

The utility model provides an optical communication system, comprising a photoelectric module provided with a light passing port; the waveguide device is arranged on the photoelectric module and provided with a first end face and a second end face which are oppositely distributed, a plurality of three-dimensional optical waveguides which do not interfere with each other and do not intersect with each other are arranged in the waveguide device, the plurality of three-dimensional optical waveguides are aligned with the plurality of light passing ports one by one on the first end face, and the second end face is provided with a waveguide area; the three-dimensional optical waveguides are distributed in the waveguide area on the second end face; and the multi-core optical fiber is arranged on the second end surface of the waveguide device, the multi-core optical fiber is aligned with the waveguide region, and a plurality of fiber cores in the multi-core optical fiber are aligned with the plurality of three-dimensional optical waveguides in the waveguide region one by one. According to the optical fiber array, the multi-core optical fiber and the waveguide device are subjected to end face coupling, and the three-dimensional optical waveguides can be coupled into the multi-core optical fiber with smaller fiber core spacing, so that the size of the optical fiber array can be reduced, the integration level is higher, and the overall packaging density is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to optical communication technical field especially relates to an optical communication system. BACKGROUND

[0002] Data centers have increasing bandwidth requirements while being increasingly energy efficient. Co-packaged optics (CPO) integrates optical chips and electrical chips in the same package to achieve high-speed, low-power optical interconnects. This integration can reduce signal transmission delay, increase data transmission rate, and reduce system power consumption.

[0003] In related technologies, the FA end face coupling technology is used in the photoelectric co-packaging to realize the transmission of optical signals between the fiber array (FA) and the optical chip. However, the FA end face coupling technology has certain limitations on the arrangement pitch of single-core optical fibers, resulting in a large pitch between two adjacent single-core optical fibers, and thus a large size of the fiber array and low overall packaging density, which cannot meet the increasing demand for speed. SUMMARY

[0004] The technical problem to be solved by the utility model is to provide an optical communication system, aiming to solve the problem of low overall packaging density after the photoelectric co-packaging adopts the FA end face coupling technology in related technologies.

[0005] To solve the above technical problems, the utility model provides an optical communication system, comprising:

[0006] The photoelectric module is provided with a plurality of light transmission openings arranged in at least one row and spaced apart.

[0007] The waveguide device is provided on the photoelectric module and has a first end face and a second end face distributed oppositely, the waveguide device is provided with a plurality of three-dimensional optical waveguides that do not interfere with each other and do not cross each other, a plurality of the three-dimensional optical waveguides are arranged one by one on the first end face and aligned with a plurality of the light transmission openings, the second end face is provided with a waveguide area, and the three-dimensional optical waveguides are distributed in the waveguide area on the second end face; and

[0008] The multi-core optical fiber is arranged on the second end face of the waveguide device, the multi-core optical fiber is arranged in alignment with the waveguide area, and a plurality of fiber cores in the multi-core optical fiber are arranged in alignment with a plurality of the three-dimensional optical waveguides in the waveguide area.

[0009] Optionally, the shape of the waveguide area matches the shape of the cross section of the multi-core optical fiber, and the distribution of each three-dimensional optical waveguide in the waveguide area matches the distribution of each fiber core in the corresponding multi-core optical fiber.

[0010] Optionally, the shape of the waveguide region comprises any one of a circle, a polygon, and an ellipse, and the three-dimensional optical waveguides in the waveguide region are regularly or irregularly distributed.

[0011] Optionally, the waveguide device is provided with a plurality of waveguide groups, each of which comprises a plurality of three-dimensional optical waveguides.

[0012] The waveguide region and the multi-core optical fiber are both provided with a plurality of waveguide regions, which are spaced apart and arranged in at least one row on the second end surface, and a plurality of waveguide groups, which are arranged one by one on the plurality of waveguide regions on the second end surface; the multi-core optical fiber is also provided with a plurality of multi-core optical fibers, which are spaced apart and arranged in at least one row on the second end surface, and the plurality of multi-core optical fibers are arranged one by one with the plurality of waveguide regions.

[0013] Optionally, the distance between two adjacent multi-core optical fibers is greater than 0.15 mm.

[0014] Optionally, the multi-core optical fiber is provided with a connecting sleeve fixed on the outside thereof, and one end surface of the connecting sleeve is in contact with the second end surface.

[0015] Optionally, the connecting sleeve is adhesively fixed on the second end surface.

[0016] Optionally, in the direction from the first end surface to the second end surface, the waveguide device is provided with a first straight waveguide region, a curved waveguide region, and a second straight waveguide region which are sequentially and continuously distributed; the length of the three-dimensional optical waveguide in the first straight waveguide region is perpendicular to the first end surface, the length of the three-dimensional optical waveguide in the second straight waveguide region is perpendicular to the second end surface, and the three-dimensional optical waveguide in the curved waveguide region is arranged in a curved manner relative to the three-dimensional optical waveguides in the first straight waveguide region and the second straight waveguide region.

[0017] Optionally, the three-dimensional optical waveguides in the first straight waveguide region are spaced apart and arranged in at least one row, and the three-dimensional optical waveguides in the second straight waveguide region are arranged in the waveguide region.

[0018] Optionally, the optoelectronic module comprises:

[0019] a substrate;

[0020] an optical chip arranged on one side surface of the substrate, one side surface of the optical chip being provided with the light passage, and the first end surface being connected to the side surface of the optical chip provided with the light passage; and

[0021] an electrical chip arranged on the substrate and electrically connected to the optical chip.

[0022] The utility model discloses a kind of optical communication systems, and compared with related art, beneficial effect is in at:By being set between multicore optical fiber and waveguide device end face coupling, multiple three-dimensional optical waveguide can be coupled into the multicore optical fiber with smaller inter-fiber spacing, compared with the array distribution multiple single-fiber optical fiber, it can reduce the size of optical fiber array, and higher integration, to improve the overall packaging density.Moreover, compared with the coupling of multiple single-core optical fiber and waveguide device, a multicore optical fiber can replace multiple single-core optical fibers, thereby improving the coupling efficiency of the system and reducing the coupling difficulty. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the related art, the drawings needed to be used in the embodiment or the related art description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0024] Figure 1 is the structure diagram of the optical communication system provided by the embodiment of the present application;

[0025] Figure 2 is the structure diagram of the waveguide device provided by the embodiment of the present application;

[0026] Figure 3 is the top view of the waveguide device provided by the embodiment of the present application.

[0027] In the drawings, the reference signs represent: 1, optoelectronic module; 11, substrate; 12, optical chip; 13, electrical chip; 2, waveguide device; 21, first end face; 22, second end face; 221, waveguide region; 23, three-dimensional optical waveguide; 3, multicore optical fiber; 31, fiber core; 4, connecting sleeve; A, first straight waveguide region; B, curved waveguide region; C, second straight waveguide region. DETAILED DESCRIPTION

[0028] The embodiments of the present application will be described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0029] In the description of the utility model, need understanding is, the term "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "circumferential", "radial" and so on the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawing, just is for the convenience of describing the utility model and simplifying the description, and not indicate or imply the device or element indicated must have a particular orientation, with a particular orientation configuration and operation, therefore can not be understood as the restriction of the utility model.

[0030] In addition, the terms "first", "second" are only for the purpose of description, and can not be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more features. In the description of the utility model, the meaning of "multiple", "several" is two or more than two, unless otherwise explicitly specified.

[0031] Embodiment:

[0032] Please refer to Figure 1 , Figure 2 And Figure 3 , the utility model embodiment provides a kind of optical communication system, including photoelectric module 1, waveguide device 2 and multicore optical fiber 3, photoelectric module 1 is equipped with the multiple light-through ports arranged into at least one row and interval distribution;Waveguide device 2 is arranged on photoelectric module 1 and has relatively distributed first end face 21 and second end face 22, multiple three-dimensional optical waveguides 23 not interfering with each other and not crossing each other are equipped in waveguide device 2, multiple three-dimensional optical waveguides 23 are set on first end face 21 with multiple light-through ports one-to-one alignment, second end face 22 is equipped with waveguide area 221, and three-dimensional optical waveguide 23 is distributed in waveguide area 221 on second end face 22;Multicore optical fiber 3 is arranged on the second end face 22 of waveguide device 2, and multicore optical fiber 3 is set with waveguide area 221 alignment, and multiple fiber cores 31 in multicore optical fiber 3 are set with multiple three-dimensional optical waveguides 23 in waveguide area 221 one-to-one alignment.

[0033] By setting the end face coupling between the multi-core optical fiber 3 and the waveguide device 2, the plurality of three-dimensional optical waveguides 23 can be coupled into the multi-core optical fiber 3 with small core spacing. Compared with the array distribution of a plurality of single-fiber optical fibers, the size of the optical fiber array can be reduced, and the integration is higher, thereby improving the overall packaging density. Moreover, since the multi-core optical fiber 3 is provided with a plurality of cores 31, more optical signal transmission channels can be provided, which is conducive to meeting the increasing demand for transmission rate. In addition, compared with the coupling of a plurality of single-core optical fibers and the waveguide device 2, one multi-core optical fiber 3 can replace a plurality of single-core optical fibers, thereby improving the coupling efficiency of the system and reducing the coupling difficulty.

[0034] It should be noted that the optical signal emitted by the optoelectronic module 1 is emitted through the light-emitting port and coupled into the waveguide device 2 through the end face. The optical signal is subjected to three-dimensional spatial transformation in the waveguide device 2 through the three-dimensional optical waveguide 23, and is coupled into the multi-core optical fiber 3 again through the end face, thereby realizing low-loss and high-efficiency coupling. Among them, the design of the plurality of three-dimensional optical waveguides 23 in the waveguide device 2 can allow complex optical signal transmission paths and multi-wavelength applications, thereby providing greater design flexibility; and the integration and miniaturization of the optical communication system can be improved, which is conducive to realizing optoelectronic integration.

[0035] It should be understood that the optical signal in the waveguide device 2 is coupled into the multi-core optical fiber 3 through the second end face 22 and is transmitted, which can realize low-loss, low-crosstalk, high-integration and high-efficiency coupling. Due to the reciprocity of light, the light emitted from the optoelectronic module 1 can also enter the optoelectronic module 1 through the same optical path, so that the optical communication system has the function of transmitting and receiving.

[0036] The shape of the waveguide region 221 matches the shape of the cross section of the multi-core optical fiber 3, that is, the shape of the waveguide region 221 is the same as the shape of the cross section of the multi-core optical fiber 3; the distribution of each three-dimensional optical waveguide 23 in the waveguide region 221 matches the distribution of each core 31 in the corresponding multi-core optical fiber 3, which is conducive to realizing accurate coupling between the three-dimensional optical waveguide 23 and the core 31.

[0037] The shape of the waveguide region 221 includes any one of a circle, a polygon, and an ellipse, wherein the polygon can be a triangle, a rectangle, a pentagon, etc.; each three-dimensional optical waveguide 23 in the waveguide region 221 is regularly distributed or irregularly distributed, and the regular distribution can be array distribution, symmetric distribution, etc.

[0038] Please refer to Figure 1 and Figure 2In some embodiments, the waveguide region 221 is circular in shape, and the three-dimensional optical waveguides 23 in the waveguide region 221 are symmetrically distributed, facilitating the alignment of the three-dimensional optical waveguides 23 with the cores 31 in the multicore optical fiber 3. For example, the cores 31 in the multicore optical fiber 3 are symmetrically arranged, which can reduce the difficulty of manufacturing the multicore optical fiber 3.

[0039] Referring to Figure 2 In a specific example, one of the three-dimensional optical waveguides 23 in the waveguide region 221 is arranged at the center of the circular waveguide region 221, and the remaining three-dimensional optical waveguides 23 are distributed at equal intervals along the circumference. For example, the three-dimensional optical waveguides 23 in the waveguide region 221 are arranged around the three-dimensional optical waveguide 23 at the center position, and the remaining three-dimensional optical waveguides 23 are arranged at equal intervals along the circumference.

[0040] The waveguide region 221 is provided with seven three-dimensional optical waveguides 23, one of which is arranged at the center of the waveguide region 221, and the remaining six three-dimensional optical waveguides 23 are arranged around the three-dimensional optical waveguide 23 at the center position, and the six three-dimensional optical waveguides 23 are distributed at equal intervals along the circumference. It should be understood that the distribution of the cores 31 in the multicore optical fiber 3 corresponds to the distribution of the three-dimensional optical waveguides 23 in the waveguide region 221.

[0041] Referring to Figure 2 and Figure 3 In some embodiments, the waveguide region 221 and the multicore optical fiber 3 can each be provided with one, and a plurality of three-dimensional optical waveguides 23 can be arranged in one waveguide region 221. One multicore optical fiber 3 is arranged in alignment with one waveguide region 221, and each core 31 in the multicore optical fiber 3 is arranged in alignment with each three-dimensional optical waveguide 23 in the waveguide region 221.

[0042] Referring to Figure 1 In some embodiments, the waveguide device 2 is provided with a plurality of waveguide groups, each waveguide group including a plurality of three-dimensional optical waveguides 23. The waveguide region 221 and the multicore optical fiber 3 are each provided with a plurality of waveguide regions 221, and the plurality of waveguide regions 221 are distributed at equal intervals on the second end face 22 and arranged in at least one row. The plurality of waveguide groups are arranged one by one on the plurality of waveguide regions 221 on the second end face 22. The plurality of multicore optical fibers 3 are distributed at equal intervals on the second end face 22 and arranged in at least one row, and the plurality of multicore optical fibers 3 are arranged in one-to-one correspondence with the plurality of waveguide regions 221, which can provide more optical signal transmission channels, thereby improving the coupling efficiency. For example,

[0043] Referring to Figure 1 In a specific example, the waveguide region 221 and the multicore optical fiber 3 can be provided with eight, and the eight waveguide regions 221 are distributed at equal intervals on the second end face 22 and arranged in a row. The eight multicore optical fibers 3 are distributed at equal intervals on the second end face 22 and arranged in a row, and the eight multicore optical fibers 3 and the eight waveguide regions 221 are arranged in alignment.

[0044] In some embodiments, the distance between two adjacent multicore optical fibers 3 is greater than 0.15 mm, for example, 0.15 mm, 0.18 mm, 0.2 mm, 0.23 mm, 0.3 mm, etc. The design of the distance can set as many multicore optical fibers 3 as possible on the basis of facilitating the connection of the multicore optical fibers 3 to the waveguide device 2.

[0045] It should be understood that the distance between two adjacent multicore optical fibers 3 can be between multicore optical fibers 3 in the same row or between multicore optical fibers 3 in different rows.

[0046] Please refer to Figure 1 The outer side of the multicore optical fiber 3 is sleeved and fixed with a connecting sleeve 4, and one end surface of the connecting sleeve 4 is in contact with the second end surface 22. The connecting sleeve 4 can increase the coupling contact area and facilitate the fixation of the multicore optical fiber 3 on the second end surface 22 of the waveguide device 2. The connecting sleeve 4 can be a glass sleeve, and the connecting sleeve 4 can be integrally provided or separately provided with the multicore optical fiber 3.

[0047] Please refer to Figure 1 In some embodiments, the connecting sleeve 4 is adhesively fixed on the second end surface 22. The connecting sleeve 4 can be adhesively fixed on the second end surface 22 of the waveguide device 2 by optical adhesive, such as ultraviolet adhesive.

[0048] In another embodiment, a plug-in part can be provided on the connecting sleeve 4, and a plug-in hole is provided on the second end surface 22 of the waveguide device 2. The plug-in part is inserted into the plug-in hole, so as to fix the connecting sleeve 4 on the waveguide device 2 and complete the coupling between the multicore optical fiber 3 and the waveguide device 2.

[0049] Please refer to Figure 1 The optoelectronic module 1 includes a substrate 11, an optical chip 12, and an electrical chip 13. The optical chip 12 is arranged on one side surface of the substrate 11. One side surface of the optical chip 12 is provided with a light passage opening. The first end surface 21 is connected to the side surface of the optical chip 12 provided with the light passage opening, so as to realize the coupling between the optical chip 12 and the waveguide device 2. The electrical chip 13 is arranged on the substrate 11 and electrically connected to the optical chip 12. The electrical chip 13 can be surface-mounted or flip-chip mounted on one side surface of the substrate 11. The electrical chip 13 and the optical chip 12 can be arranged on the same side or different sides of the substrate 11.

[0050] According to actual needs, the side surface of the optical chip 12 away from the substrate 11 is arranged protruding relative to the side surface of the waveguide device 2 away from the substrate 11. The end of the waveguide device 2 away from the optical chip 12 extends out of the substrate 11, so as to facilitate the connection and fixation between the waveguide device 2 and the optical chip 12.

[0051] Please refer to Figure 2 and Figure 3In the direction along the first end surface 21 towards the second end surface 22, the waveguide device 2 is provided with a first straight waveguide area A, a curved waveguide area B and a second straight waveguide area C which are sequentially and continuously distributed; wherein the length of the three-dimensional optical waveguide 23 in the first straight waveguide area A is perpendicular to the first end surface 21, and the length of the three-dimensional optical waveguide 23 in the second straight waveguide area C is perpendicular to the second end surface 22, and a redundant amount can be reserved for subsequent grinding and polishing. The three-dimensional optical waveguide 23 in the curved waveguide area B is arranged to be curved relative to the three-dimensional optical waveguide 23 in the first straight waveguide area A and the second straight waveguide area C, and the three-dimensional optical waveguide 23 in the curved waveguide area B can change the three-dimensional twist of the optical path, thereby remapping the optical port distribution, which helps to solve the coupling problem caused by the mode field and the structure adaptation, and realizes the low-loss and low-crosstalk change of the beam position.

[0052] In the utility model, in order to determine the position of optical chip 12 and multicore optical fiber 3, spot size and optical path layout, simulation and optimization are carried out using optical design software, and the optical path is ensured to meet the performance requirements. The path, bending, branching and coupling area of the three-dimensional optical waveguide 23 are designed to ensure that the optical signal can be effectively transmitted.

[0053] In some embodiments, in order to optimize the bending loss caused by the bending of the three-dimensional optical waveguide 23, the curvature radius and length of the three-dimensional optical waveguide 23 need to be optimized. For this purpose, the bending loss of the three-dimensional optical waveguide 23 in the curved waveguide area B satisfies the following formula:

[0054]

[0055] Wherein, a t is the bending loss of the three-dimensional optical waveguide 23, a is the bending loss coefficient of the three-dimensional optical waveguide 23, R is the curvature radius of the three-dimensional optical waveguide 23, R can be approximately |1 / S''|, L is the length of the curved waveguide area B, and S is the transition function of the curved waveguide area B.

[0056] It should be understood that the bending loss of the S-shaped three-dimensional optical waveguide 23 such as cosine type, sine type, power function type and circular arc type can be simulated and calculated according to the above bending loss formula, so as to optimize the curvature radius and length of the three-dimensional optical waveguide 23 and reduce the overall insertion loss of the waveguide device 2. Wherein, the additional bending loss is not more than 0.5dB, so that the waveguide device 2 has the characteristics of low bending loss.

[0057] In some embodiments, the three-dimensional optical waveguide 23 is formed by femtosecond laser direct writing processing of the waveguide device 2, and the transition function of the curved waveguide area B satisfies the following formula when the bending curve of the three-dimensional optical waveguide 23 in the curved waveguide area B is processed:

[0058]

[0059] Wherein, x(t) is the transition function in the horizontal axis direction, A1 is the horizontal axis direction component of the relative displacement amount of the cross section of the three-dimensional optical waveguide 23 at both ends in the curved waveguide region B, y(t) is the transition function in the vertical axis direction, and A2 is the vertical axis direction component of the relative displacement amount of the cross section of the three-dimensional optical waveguide 23 at both ends in the curved waveguide region B.

[0060] It should be understood that the femtosecond laser is scanned and directly processed according to the curved trajectory satisfying the above formula, which can optimize the overall transmission loss of the waveguide device 2. During processing, the horizontal axis coordinate of the real-time position relative to the zero position of the femtosecond laser direct writing processing satisfies the transition function x(t), and the vertical axis coordinate satisfies the transition function y(t).

[0061] Since the three-dimensional optical waveguide 23 is formed by femtosecond laser direct writing processing on the waveguide device 2, it can form a precise three-dimensional optical waveguide 23 inside the glass material without damaging the surface of the material. The stability and heat resistance of the glass material enable the waveguide device 2 to work stably under various environmental conditions, thereby being used for three-dimensional directional optical signal transmission. Of course, the waveguide device 2 can also be made of different transparent materials such as lithium niobate, polymers or various crystal materials, etc.

[0062] In some embodiments, the femtosecond laser processing device includes a femtosecond laser in the near-infrared or visible light band, an objective lens, and a three-dimensional motorized displacement stage. Before processing, a glass material suitable for laser processing is selected. Such material should have sufficient transparency and appropriate optical properties to allow laser pulses to propagate and absorb inside. A femtosecond laser is used, which can generate ultrashort pulses (femtosecond level) with high peak power, which can generate nonlinear optical effects inside the material. The femtosecond laser is focused inside the glass through the objective lens. The focusing position and scanning path of the light beam are precisely controlled to form the required three-dimensional structure. When the femtosecond laser pulse is focused inside the glass, due to its high peak power, nonlinear absorption effects can be generated in the focusing area, causing permanent changes in the glass material in the local area (such as changes in refractive index). By precisely controlling the movement and repeated scanning of the laser beam, the refractive index inside the glass is changed point by point, and the three-dimensional optical waveguide 23 is gradually constructed. Using the three-dimensional processing capability of the femtosecond laser, a complex three-dimensional path can be created inside the glass, including curved, branched and crossed structures, without damaging the glass surface. According to the test results, it may be necessary to adjust the laser processing parameters for optimization and iteration to achieve the best performance. The processed waveguide coupling loss is <0.35 dB / surface, and the transmission loss is <0.15 dB / cm (straight waveguide or large bending radius waveguide), so this processing method has the advantages of low loss and high efficiency.

[0063] Please refer to Figure 3In some embodiments, the length of the first straight waveguide region A is in the range of 0.5mm-1.5mm, for example, 0.5mm, 0.6mm, 0.8mm, 1mm, 1.2mm, 1.5mm, etc. The length of the curved waveguide region B is in the range of 8mm-15mm, for example, 8mm, 9mm, 10mm, 12mm, 14mm, 15mm. The length of the second straight waveguide region C is in the range of 0.5mm-1.5mm, for example, 0.5mm, 0.6mm, 0.8mm, 1mm, 1.2mm, 1.5mm, etc.

[0064] Referring to Figure 3 In some embodiments, the three-dimensional optical waveguides 23 in the first straight waveguide region A are spaced apart and uniformly distributed, for example, the distance between two adjacent three-dimensional optical waveguides 23 in the first straight waveguide region A can be 125um or an integer multiple thereof, 250um or an integer multiple thereof. The three-dimensional optical waveguides 23 in the same row in the second straight waveguide region C are equidistantly spaced apart, and the distance between two adjacent three-dimensional optical waveguides 23 in the second straight waveguide region C can be 80um or an integer multiple thereof, 125um or an integer multiple thereof, 250um or an integer multiple thereof.

[0065] It should be noted that the distance between the three-dimensional optical waveguides 23 in the first straight waveguide region A matches the distance between the light transmission ports, and the distance between the three-dimensional optical waveguides 23 in the same waveguide region 221 in the second straight waveguide region C matches the distance between the fiber cores 31 in the multi-core optical fiber 3, and the diameter of the three-dimensional optical waveguides 23 in the second straight waveguide region C matches the diameter of the fiber cores 31 in the multi-core optical fiber 3.

[0066] Referring to Figure 3 In some embodiments, the three-dimensional optical waveguides 23 in the first straight waveguide region A are spaced apart and arranged in at least one row, and the three-dimensional optical waveguides 23 in the second straight waveguide region C are arranged in the waveguide regions 221, for example, the three-dimensional optical waveguides 23 in the first straight waveguide region A are spaced apart and arranged in one row, two rows, or three rows, and the three-dimensional optical waveguides 23 in the second straight waveguide region C are arranged in the corresponding waveguide regions 221.

[0067] In one specific example, the optical chip 12 is provided with two rows of light transmission ports, and the light transmission ports can be distributed as 2*28. The optical signals are emitted from the light transmission ports and coupled into the waveguide device 2 through the first end face 21, and the optical signals are mapped in the three-dimensional space through the optical path of the waveguide device 2, so that the 2*28 Gaussian signal lights are mapped into eight groups of seven-core multi-core optical fibers 3.

[0068] It should be noted that the first end surface 21 of the waveguide device 2 matches the light passing port position of the packaged optical chip 12, and can match different designs of 125um, 250um and other specific pitches; the second end surface 22 of the waveguide device 2 matches the multi-core optical fiber 3, and the three-dimensional optical waveguide 23 in the waveguide area 221 can match the multi-core optical fiber 3 of four cores, seven cores, twelve cores and nineteen cores.

[0069] In the embodiment of the utility model, the multi-dimensional electric or manual displacement table is used for coupling the optoelectronic module 1, the waveguide device 2 and the multi-core optical fiber 3, the vacuum suction clamp is used for fixing the optoelectronic module 1 and the waveguide device 2, and under the real-time observation of the high-definition camera, the displacement table is used for adjusting the optoelectronic module 1 and the waveguide device 2. The coupling condition of the optoelectronic module 1 and the waveguide device 2 is confirmed and preliminary alignment is carried out, the position deviation is fed back by using the real-time monitoring of the optical power meter, and then after fine adjustment of the device, the ultraviolet glue is used for curing, the ultraviolet glue with good light transmission is selected for end surface coupling, the influence of curing deformation on the coupling loss of the device is reduced. Then the multi-core optical fiber 3 is bonded on the second end surface 22 of the waveguide device 2 by using the connecting sleeve 4.

[0070] The above only describes the preferred embodiment of the utility model, and does not limit the utility model, and any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. An optical communication system, characterized by, The application relates to a photoelectric module, a waveguide device and a multi-core optical fiber. The photoelectric module comprises: a photoelectric module provided with a plurality of light transmission openings arranged in at least one row and distributed at intervals; a waveguide device arranged on the photoelectric module and provided with oppositely distributed first and second end faces, the waveguide device being provided with a plurality of three-dimensional optical waveguides which do not interfere with and cross each other, the plurality of three-dimensional optical waveguides being arranged in one-to-one correspondence with the plurality of light transmission openings on the first end face, and the second end face being provided with a waveguide area, the plurality of three-dimensional optical waveguides being distributed in the waveguide area on the second end face; and a multi-core optical fiber arranged on the second end face of the waveguide device, the multi-core optical fiber being arranged in correspondence with the waveguide area, and a plurality of fiber cores in the multi-core optical fiber being arranged in one-to-one correspondence with the plurality of three-dimensional optical waveguides in the waveguide area. The shape of the waveguide area matches the shape of the cross section of the multi-core optical fiber, and the distribution of each three-dimensional optical waveguide in the waveguide area matches the distribution of each fiber core in the corresponding multi-core optical fiber. The shape of the waveguide area comprises any one of a circle, a polygon and an ellipse, and each three-dimensional optical waveguide in the waveguide area is regularly distributed or irregularly distributed.

2. The optical communication system of claim 1, wherein, The waveguide device is provided with a plurality of waveguide groups, and each waveguide group comprises a plurality of three-dimensional optical waveguides.

3. The optical communication system of claim 2, wherein, The waveguide area and the multi-core optical fiber are each provided with a plurality of waveguide areas, the plurality of waveguide areas being distributed at intervals and arranged in at least one row on the second end face, the plurality of waveguide groups being arranged in one-to-one correspondence on the plurality of waveguide areas on the second end face, the plurality of multi-core optical fibers being distributed at intervals and arranged in at least one row on the second end face, and the plurality of multi-core optical fibers being arranged in one-to-one correspondence with the plurality of waveguide areas.

4. The optical communication system of claim 1, wherein, The distance between two adjacent multi-core optical fibers is greater than 0.15 mm. An outer side of the multi-core optical fiber is provided with a connecting sleeve, and one end face of the connecting sleeve is in contact with the second end face.

5. The optical communication system of claim 4, wherein, The connecting sleeve is adhesively fixed on the second end face.

6. The optical communication system of claim 1, wherein, In the direction from the first end face to the second end face, the waveguide device is provided with a first straight waveguide area, a curved waveguide area and a second straight waveguide area which are sequentially and continuously distributed; the length of a three-dimensional optical waveguide in the first straight waveguide area is perpendicular to the first end face, the length of a three-dimensional optical waveguide in the second straight waveguide area is perpendicular to the second end face, and the three-dimensional optical waveguides in the curved waveguide area are arranged in a curved manner relative to the three-dimensional optical waveguides in the first straight waveguide area and the second straight waveguide area.

7. The optical communication system of claim 6, wherein, The three-dimensional optical waveguides in the first straight waveguide area are arranged at intervals and in at least one row, and the three-dimensional optical waveguides in the second straight waveguide area are arranged in the waveguide area.

8. The optical communication system of claim 1, wherein, The photoelectric module comprises: a substrate; a light chip arranged on one side of the substrate, one side surface of the light chip being provided with the light transmission openings, and the first end face being connected with the one side surface of the light chip provided with the light transmission openings; and an electric chip arranged on the substrate and electrically connected with the light chip.

9. The optical communication system of claim 8, wherein, ​ 10. The optical communication system of claim 1, wherein, ​ ​ ​ ​

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