Waveguide device and optical coupling structure and photoelectric system using same

Abstract

An optical coupling structure is suitable for a photonic integrated circuit and comprises a waveguide device and an optical fiber assembly. The waveguide device includes a waveguide substrate including a plurality of optical waveguide channels extending between a first guide surface and a second guide surface of the waveguide substrate. The first guide surface defines a first light-emitting area, the tail end of the optical waveguide channel is exposed to the first light-emitting area, the second guide surface defines a second light-emitting area, and the other end of the optical waveguide channel is exposed to the second light-emitting area. The overall length of the second light-emitting area is less than at least half of the overall length of the first light-emitting area, and the optical fiber assembly is connected to the first guide surface of the waveguide device.

Description

Technical Field

[0001] The present invention relates to the field of optical coupling technology, and in particular to a waveguide device, an optical coupling structure and an optoelectronic system. Background Art

[0002] Optical data transmission between optoelectronic integrated circuits (OEICs) and devices connected to the OEICs is carried out through optical components such as optical fibers. As the amount of data transmitted through optical fibers grows rapidly, OEICs need to be equipped with photonic chips of sufficient size to match the configuration of an increasing number of optical transmission channels and align with the individual cores of the optical fibers. However, the increase in the number of optical transmission channels also spans larger sizes of photonic chips, which will bring about the problem of deformation of the photonic chips due to the stress of their own deposited materials. For example, Figure 1 As shown, the opposite side portion 91 of the photonic chip 9 is prone to bending, which causes misalignment between the optical transmission channel 92 and the cores 94 of the plurality of optical fibers 93, thereby resulting in invalid optical signal transmission. Summary of the invention

[0003] The object of the present application is to provide an optical coupling structure, which can prevent a photonic integrated circuit optically coupled thereto from warping.

[0004] To achieve the above-mentioned purpose, one aspect of the present application is to provide an optical coupling structure suitable for photonic integrated circuits. The optical coupling structure includes a waveguide device and an optical fiber assembly. The waveguide device includes a waveguide substrate, the waveguide substrate includes a first guide surface and a second guide surface relative to the first guide surface; and a plurality of optical waveguide channels, the plurality of optical waveguide channels are arranged on the waveguide substrate and extend between the first guide surface and the second guide surface, wherein the first guide surface defines a first light exit area, and the end of the optical waveguide channel is exposed in the first light exit area; the second guide surface defines a second light exit area, and the other end of the optical waveguide channel is exposed in the second light exit area; and the overall length of the second light exit area is less than at least half of the overall length of the first light exit area. The optical fiber assembly is connected to the first guide surface of the waveguide substrate.

[0005] Optionally, the waveguide substrate further includes a first corner portion, a second corner portion, and a middle portion located between the first corner portion and the second corner portion and disposed on the second guiding surface, and the second light exiting area is located at the first corner portion, the second corner portion, or the middle portion. The second light exiting area is located at the first corner portion, the second corner portion, or the middle portion.

[0006] Optionally, the waveguide substrate is defined as a first region, a second region and a third region located between the first region and the second region. The optical waveguide channels in the first region are arranged at a first pitch, and the optical waveguide channels in the second region are arranged at a second pitch smaller than the first pitch.

[0007] Optionally, the spacing between adjacent optical waveguide channels in the third region is changed from the first spacing to the second spacing, so that the optical waveguide channels in the third region have a fan-out configuration and a fan-in configuration.

[0008] Optionally, the optical fiber assembly includes a plurality of optical fibers, the number of the optical waveguide channels is equal to the number of the optical fibers, and the optical waveguide channels arranged in the first area are aligned with the optical fibers.

[0009] Optionally, the waveguide substrate has a length that is parallel to the first guiding surface and is greater than 20 mm.

[0010] Optionally, the thickness of the waveguide substrate is greater than the thickness of the photonic integrated circuit.

[0011] Optionally, the optical waveguide channels are arranged in an array on the upper surface of the waveguide device.

[0012] Optionally, the waveguide device is made of a material including silicon dioxide, lithium niobate (LiNbO3) or a polymer.

[0013] Optionally, the optical waveguide channels are arranged in an array, the overall length of the first light exit area is measured between the two outermost optical waveguide channels relative to the first guiding surface, and the overall length of the second light exit area is measured between the two outermost optical waveguide channels relative to the second guiding surface.

[0014] Another aspect of the present application is to provide a waveguide device suitable for a photonic integrated circuit. The waveguide device includes a waveguide substrate, the waveguide substrate includes a first guide surface and a second guide surface relative to the first guide surface; a first corner portion, located on the second guide surface; a second corner portion, located on the second guide surface; a middle portion, located between the first corner portion and the second corner portion and located on the second guide surface; and a plurality of optical waveguide channels, which are arranged on the waveguide substrate and extend between the first guide surface and the second guide surface. One end of the optical waveguide channel is exposed at the first corner portion, the second corner portion or the middle portion, and the other end of each of the optical waveguide channels is exposed at the first guide surface.

[0015] Another aspect of the present application is to provide an optoelectronic system, comprising: an optoelectronic device, comprising a main board, a carrier board mounted on the main board, and an electronic integrated circuit mounted on the main board; the photonic integrated circuit is arranged on the carrier board; and a detachable optical coupling structure. The optical coupling structure comprises a first connector and a second connector. The first connector is arranged on the carrier board, and comprises a base and a waveguide device arranged in the base. The waveguide device comprises a waveguide substrate, the waveguide substrate comprises a first guide surface and a second guide surface opposite to the first guide surface, and a plurality of optical waveguide channels, the plurality of optical waveguide channels are arranged on the waveguide substrate and extend between the first guide surface and the second guide surface. The first guide surface defines a first light exit area, the end of the optical waveguide channel is exposed in the first light exit area, and the second guide surface defines a second light exit area, the other end of the optical waveguide channel is exposed in the second light exit area, and the overall length of the second light exit area is less than at least half of the overall length of the first light exit area. The second connector comprises an optical fiber assembly, and the second connector is detachably connected to the first connector.

[0016] The optical coupling structure in the embodiment of the present application includes a waveguide device, which can significantly reduce and narrow the area of ​​the optical transmission channel of the photonic integrated circuit optically coupled to the optical waveguide channel of the waveguide device, thereby avoiding misalignment between the optical transmission channel of the photonic integrated circuit and the optical waveguide channel due to warping of the relative parts of the photonic integrated circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to describe the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings used in the description of the embodiments. The drawings in the following description only illustrate some embodiments of the present invention, and those skilled in the art can also derive other drawings based on these drawings without creative work.

[0018] Figure 1 Schematic diagram of a top view of a traditional optical coupling module.

[0019] Figure 2 Schematic diagram of an exploded view of an optical coupling structure according to an embodiment of the present application.

[0020] Figure 3A Schematic diagram of the structure of a waveguide device according to an embodiment of the present application.

[0021] Figure 3B Schematic diagram of the structure of a waveguide device according to an embodiment of the present application.

[0022] Figure 4 Schematic diagram of an optical coupling structure for a photonic integrated circuit according to an embodiment of the present application.

[0023] Figure 5 Schematic diagram of an optical coupling structure for a photonic integrated circuit according to an embodiment of the present application.

[0024] Figure 6 Schematic diagram of an optical coupling structure for a photonic integrated circuit according to an embodiment of the present application.

[0025] Figure 7 It is a partially enlarged schematic diagram of the alignment of the optical fiber assembly and the waveguide device according to an embodiment of the present application.

[0026] Figure 8 Schematic diagram of the structure of a photoelectric system according to an embodiment of the present application.

[0027] Fig.9A is a schematic three-dimensional combination diagram of a detachable optical coupling structure according to an embodiment of the present application.

[0028] Fig. 9B yes Fig.9A Schematic diagram of a device in which the second connector is detached from the first connector. DETAILED DESCRIPTION

[0029] The following embodiments will illustrate specific practicable embodiments of the present application with reference to the accompanying drawings. Directional terms described in the present application, such as up, down, front, back, left, right, inside, outside, side, etc., are only referenced to the directions of the accompanying drawings, so the directional terms used are intended to be used to describe and understand the present application, but the present application is not limited thereto.

[0030] It should be understood that although the terms first, second, etc. may be used herein to describe various components, these components should not be limited by these terms. Unless otherwise specified, these terms are only used to distinguish one component from another component. Therefore, for example, the first component, first part, or first portion discussed below may be referred to as the second component, second part, or second portion without departing from the teachings of the present application. In addition, the present application may repeat reference numbers and / or letters in various examples. This repetition is for the purpose of simplicity and clarity and does not itself determine the relationship between the various embodiments and / or configurations discussed.

[0031] The present application provides an optical coupling structure for a photonic integrated circuit. The photonic integrated circuit can be disposed on an optoelectronic device, which can be a co-packaged optical (CPO) device that integrates at least one electronic integrated circuit (EIC) and at least one photonic integrated circuit (PIC) in a single package for electro-optical conversion or photoelectric conversion.

[0032] See also Figure 2 and Figure 3A , Figure 2 A schematic diagram of a light coupling structure 100A provided in an embodiment of the present application is shown in FIG. Figure 3A This is a schematic diagram of the structure of a waveguide device provided in an embodiment of the present application. Figure 2 As shown, the optical coupling structure 100A includes a waveguide device 1 and an optical fiber component 2. In some embodiments, as Figure 3A As shown in FIG. 1 , the basic structure of the waveguide device 1a includes: a waveguide substrate 11, which is rectangular and includes an upper surface 12, a lower surface 13 opposite to the upper surface 12, a first guide surface 14 connected between the upper surface 12 and the lower surface 13, a second guide surface 15 opposite to the first guide surface 14, and a plurality of optical waveguide channels 16 arranged on the waveguide substrate 11 (for clarity, the optical waveguide channels 16 are shown in FIG. 1 ). Figure 3A is shown as a straight line path rather than in Figure 2 In some embodiments, the waveguide device 1a is made of a material including, for example, silicon dioxide. Alternatively, the waveguide device 1a may be made of a material including lithium niobate (LiNbO3) or a polymer, or the waveguide device 1a may have a silicon-on-insulator (SOI) structure.

[0033] It is worth noting that Figure 3A The main purpose is to illustrate the position of the optical waveguide channel 16 relative to the waveguide device 1a, so the specific and overall layout of the optical waveguide channel 16 is not shown. Figure 3A As shown, the optical waveguide channels 16 are arranged in an array on the upper surface 12 of the waveguide substrate 11 and are configured as an array waveguide grating (AWG) structure. The optical waveguide channels 16 are configured to realize optical signal transmission between the photonic integrated circuit and the optical fiber component 2. In some embodiments, the waveguide device 1 or 1a is configured to arrange at least 32 optical waveguide channels 16, but the number of optical waveguide channels 16 is not limited thereto, but is determined according to actual needs. In one embodiment, the waveguide substrate 11 has a length parallel to the first guide surface 14 and greater than 20 mm, for covering a configuration including 32 optical waveguide channels 16.

[0034] See also Figure 3B , Figure 3B The basic structure of the waveguide device 1b shown is similar to Figure 3A The waveguide device 1a shown differs in the position of the optical waveguide channel 16. Figure 3B As shown, the waveguide device 1b includes a plurality of optical waveguide channels 16, which are arranged in the waveguide device 1b between the first guide surface 14 and the second guide surface 15 and close to the lower surface 13, so as to cooperate with the micro-inclined reflection component (not shown for clarity) located at the second guide surface 15 of the waveguide device 1b. It should be noted that the arrangement of the optical waveguide channels 16 is not limited to the aforementioned type.

[0035] Continue reading Figure 2The optical fiber assembly 2 is connected to the first waveguide surface 14 of the waveguide substrate 11 and includes a plurality of optical fibers 21 arranged in an array. The number of the optical waveguide channels 16 is the same as the number of the optical fibers 21. Figure 2 , Figure 3A As shown, the first guide surface 14 defines a first light exit area 140, and the end of the optical waveguide channel 16 is exposed in the first light exit area 140. The second guide surface 15 defines a second light exit area 150, and the other end of the optical waveguide channel 16 is exposed in the second light exit area 150. In this embodiment, the overall length of the second light exit area 150 is less than at least half of the overall length of the first light exit area 140. The optical fiber 21 corresponds to the optical waveguide channel 16 one by one relative to the first light exit area 140. Specifically, the overall length of the first light exit area 140 is measured between the two outermost optical waveguide channels 16 relative to the first guide surface 14, and the overall length of the second light exit area 150 is measured between the two outermost optical waveguide channels 16 relative to the second guide surface 15.

[0036] See also Figure 4 and Figure 2 , Figure 4 This is a schematic diagram of the structure of the optical coupling structure 100A of the photonic integrated circuit 3 provided in the embodiment of the present application. Figure 4 As shown, the photonic integrated circuit 3 includes a plurality of optical transmission channels 31. One end of the waveguide device 1 is coupled to the photonic integrated circuit 3, and the other end is coupled to the optical fiber component 2, so that the optical signal is transmitted between the photonic integrated circuit 3 and the optical fiber component 2 through the waveguide device 1. The waveguide substrate 11 is defined as a first region 10a, a second region 10b, and a third region 10c located between the first region 10a and the second region 10b. Figure 4 As shown, the waveguide substrate 11 further includes a first corner portion 151, and the first corner portion 151 is located in the upper left area on the second guiding surface 15 of the waveguide substrate 11. Specifically, one end of each optical waveguide channel 16 terminates at the second guiding surface 15 at the first corner portion 151 to couple with the plurality of optical transmission channels 31 of the photonic integrated circuit 3. In this embodiment, the second light exit area 150 is located at the first corner portion 151.

[0037] In some embodiments, the width of each optical waveguide channel 16 ranges from 9 micrometers (μm) to 100 μm, which is determined according to the design of the optical transmission channel 31. Figure 4 As shown, the optical waveguide channels 16 in the first region 10a are arranged at a first pitch ranging from 100 μm to 300 μm, preferably 125 μm, and are aligned with the optical fiber 21 (see the description below). Figure 7). The optical waveguide channels 16 in the second region 10b are arranged at a second pitch, the second pitch ranges from 5 μm to 100 μm, preferably 50 μm, and the second pitch is smaller than the first pitch. In the third region 10c, the optical waveguide channels 16 are arranged at the first pitch near the first region 10a, and at the second pitch near the second region 10b. Specifically, in the third region 10c, the optical waveguide channels 16 bend from near the first region 10a, then extend toward the first corner portion 151, and finally bend again from near the second region 10b.

[0038] Continue reading Figure 4 In some embodiments, each optical waveguide channel 16 in the third region 10c includes two symmetrical curved segments 161 and 162 and one straight segment 163. The curved segments 161, 162 and the straight segment 163 of adjacent optical waveguide channels 16 in the third region 10c are parallel to each other. Specifically, the size of the spacing between adjacent optical waveguide channels in the optical waveguide channels 16 in the third region 10c changes from the first spacing to the second spacing, so that the optical waveguide channels 16 in the third region 10c are formed to have a fan-out configuration and a fan-in configuration.

[0039] like Figure 4 As shown, through the layout of the optical waveguide channel 16, the optical waveguide channel 16 spans the entire waveguide device 1 from the first guide surface 14 in the first region 10a, reaches the second guide surface 15 at the first corner portion 151, and the first corner portion 151 is narrower than the span between the two outermost optical waveguide channels 16 in the first region 10a. Therefore, while ensuring that the optical signal is transmitted from the optical fiber component 2 to the photonic integrated circuit 3 and transmitted from the photonic integrated circuit 3, the overall length of the second light output region 150 can be significantly reduced.

[0040] Continue reading Figure 4 The multiple optical transmission channels 31 of the photonic integrated circuit 3 only occupy a small area at the edge of the photonic integrated circuit 3, and the spacing between the multiple optical transmission channels 31 is smaller than the spacing between the optical fibers 21 (see the description below). Figure 7 ). The multiple optical transmission channels 31 provided according to the embodiment of the present invention can reduce the stress on the deposited material on the optical integrated circuit 3 (i.e., the photonic chip), thereby alleviating the deformation problem of the photonic chip. In this way, the opposite side of the photonic chip will not bend to cause the optical transmission channel 31 and the core 22 of the optical fiber 21 (see below) Figure 7 ) misalignment, thereby achieving effective optical signal transmission.

[0041] In some embodiments, the thickness of the waveguide substrate 11 is greater than the thickness of the photonic integrated circuit 3 , so that the thickness of the waveguide substrate 11 is sufficient to prevent the waveguide substrate 11 from warping and allow a large number of optical waveguide channels 16 to be arranged, for example, more than 32 waveguide paths.

[0042] See also Figure 5 , Figure 5 Schematic diagram of a light coupling structure 100B for a photonic integrated circuit 3 provided in a second embodiment of the present application. The main difference between the light coupling structure 100B and the light coupling structure 100A is that the waveguide device 1 includes a second corner portion 152, which is located in the lower left area of ​​the waveguide device 1 and is adjacent to the second guide surface 15. Similarly, in this embodiment, the optical waveguide channel 16 spans the entire waveguide device 1 in the first area 10a, from the first guide surface 14 to the second guide surface 15 in the second corner portion 152, and the second corner portion 152 is narrower than the span between the two outermost optical waveguide channels 16 in the first area 10a.

[0043] See also Figure 6 , Figure 6 Schematic diagram of the structure of an optical coupling structure 100C for a photonic integrated circuit 3 provided in the third embodiment of the present application. The main difference between the optical coupling structure 100C and the optical coupling structures 100A and 100B is that the waveguide device 1 includes a middle portion 153, which is located between the lower left area and the upper left area of ​​the waveguide device 1 and is adjacent to the second guide surface 15. In this embodiment, the optical waveguide channels 16 in the third area 10c are arranged symmetrically, so that the layout of the optical waveguide channels 16 is divided in half. The optical waveguide channel 16 spans the entire waveguide device 1 in the first area 10a, from the first guide surface 14 to the middle portion 153 on the second guide surface 15, and the middle portion 153 is narrower than the span between the two outermost optical waveguide channels 16 in the first area 10a.

[0044] Combination Figure 4 See also Figure 7 , Figure 7 It is a partial enlarged schematic diagram of the alignment of the optical fiber assembly and the waveguide device. In some embodiments, the optical fiber assembly 2 includes a plurality of optical fibers 21, which are arranged in a single row or multiple rows in parallel and extend to and are exposed at the first guide surface 14. In some embodiments, the optical fiber 21 can be, for example, a single-mode optical fiber, a multi-mode optical fiber, or a polarization-maintaining optical fiber. Each optical fiber 21 has a core 22, and the core 22 is optically aligned with the corresponding optical waveguide channel 16 so that the light beam can propagate to the waveguide device 1. The diameter of the core 22 ranges from 8.3 μm to 62.5 μm. In some embodiments, the cladding diameter of the optical fiber 21 is 125 μm, and the diameter of the optical fiber 21 (including the coating) is 250 μm.

[0045] See also Figure 8 , Figure 8 Schematic diagram of the structure of the optoelectronic system 6. The optoelectronic system 6 includes an optical coupling structure 100, a photonic integrated circuit 3 and a co-packaged optoelectronic device 5. In detail, the optical coupling structure 100 includes a waveguide device 1 and an optical fiber assembly 2 as described in the above embodiment. The optoelectronic device 5 includes a main board 50, and a carrier board 51 and an electronic integrated circuit 52 mounted on the main board 50. The photonic integrated circuit 3 is disposed on the carrier board 51 to be co-packaged in the co-packaged optoelectronic device 5. In some embodiments, the co-packaged optoelectronic device 5 can be applied to a switch.

[0046] See also Fig.9A and Fig. 9B , Fig.9A A schematic diagram of a three-dimensional combination of a detachable optical coupling structure provided in an embodiment of the present application, Fig. 9B for Fig.9A Schematic diagram of the disassembly of the second connector after being removed from the first connector. In some embodiments, the optoelectronic system 6 further includes a detachable optical coupling structure 100'. The optical coupling structure 100' includes a first connector 42 and a second connector 43. The first connector 42 and the second connector 43 are detachably connected, and the second connector 43 can be easily replaced. Fig.9A and Fig. 9B As shown, the first connector 42 includes a base 420 and a waveguide device 421 as described in the above embodiments. The base 420 includes a lower surface 420B, an upper surface 420T, and a front end 420F connected between the lower surface 420B and the upper surface 420T. In some embodiments, a cutout portion 422 is formed in the base 420, and the cutout portion 422 is recessed from the front end 420F, and the waveguide device 421 is disposed in the cutout portion 422. In detail, the cutout portion 422 is configured to pass through the lower surface 420B, the upper surface 420T, and the front end 420F of the base 420. It is worth noting that the waveguide device 421 can be the waveguide device 1 in any of the above embodiments, such as Figures 2 to 7 shown.

[0047] In some embodiments, Fig. 9BAs shown, a plurality of positioning members 423 are symmetrically arranged on the front end 420F of the base 420 relative to the middle part of the base 420, and are spaced apart from each other on the opposite sides of the cutout portion 422 and the waveguide device 421. The retaining wall 424 is formed on the base 420 and extends downwardly from the lower surface 420B in a curved manner, so that the base 420 has an inverted L-shaped cross-sectional profile. In the present embodiment, the number of the positioning members 423 is two, and the shape of the positioning members 423 is pin-shaped, and they extend outward from the front end 420F on the retaining wall 424, respectively. In some embodiments, the base 420 is made of a material having high temperature resistance, such as ceramic or metal, such as zirconium dioxide (ZrO2). Alternatively, the base 420 can be made of a non-metallic material, such as an organic binder (e.g., resin), a polymer, or a plastic.

[0048] In some embodiments, the waveguide device 421 can be formed of materials such as fused silica, quartz, glass, borosilicate glass, etc. It should be noted that the waveguide device 421 includes a planar light waveguide (PLC). In some embodiments, the planar light waveguide can be configured in various ways of fan-out / fan-in arrangement. The planar light waveguide in the embodiments of the present application can adopt various types of waveguide optical paths or devices.

[0049] Continue reading Fig.9A and 9B In some embodiments, the second connector 43 includes an optical fiber 431 and a docking member 432 configured to be detachably connected to the first connector 42. It is worth noting that the optical fiber 431 can be the optical fiber 21 in any of the aforementioned embodiments, such as Figures 2 to 7 The optical fiber 431 has a plurality of optical fiber ends 433 (such as Fig.9A In this embodiment, the docking member 432 functions as a multi-channel optical connector, and includes a connection surface 434 disposed facing the front end 420F of the base 420, and a plurality of grooves (not shown) disposed corresponding to the pin-shaped positioning member 423. Fig.9A As shown, the second connector 43 is inserted into the first connector 42. Fig. 9B As shown, the second connector 43 can be detached from the base 420 of the first connector 42 .

[0050] In this arrangement, if Fig.9A As shown, the fiber end 433 of the optical fiber 431 is positioned to directly face the cutout portion 422 at the front end 420F of the base 420, so that the optical fiber 431 and the waveguide device 421 are transmitted signals in a surface coupling manner. It should be noted that the signal transmission between the optical fiber 431 and the waveguide device 421 is not limited to the above-mentioned surface coupling optical coupling form, and various coupling modes can be used.

[0051] Accordingly, the present application provides an optical coupling structure including a waveguide device, so that the area of ​​the optical transmission channel of the photonic integrated circuit optically coupled to the optical waveguide channel of the waveguide device is greatly reduced and narrowed, thereby avoiding misalignment between the optical transmission channel of the photonic integrated circuit and the optical waveguide channel due to warping of the relative parts of the photonic integrated circuit.

[0052] One aspect of the present application provides an optical coupling structure 100, which is suitable for a photonic integrated circuit 3. The optical coupling structure 100 includes a waveguide device 1, the waveguide device 1 includes a waveguide substrate 11, the waveguide substrate 11 includes a first guide surface 14 and a second guide surface 15 located at a position opposite to the first guide surface 14, and a plurality of optical waveguide channels 16 arranged on the waveguide substrate 11 and extending between the first guide surface 14 and the second guide surface 15. The first guide surface 14 defines a first light exit area 140, and the end of the optical waveguide channel 16 is exposed to the first light exit area 140, and the second guide surface 15 defines a second light exit area 150, and the other end of the optical waveguide channel 16 is exposed to the second light exit area 150, and the overall length of the second light exit area 150 is less than at least half of the overall length of the first light exit area 140; the optical fiber assembly 2 is connected to the first guide surface 14 of the waveguide device 1.

[0053] Another aspect of the present application provides a waveguide device 1, which is suitable for a photonic integrated circuit 3. The waveguide device 1 includes a waveguide substrate 11, the waveguide substrate 11 includes a first guide surface 14 and a second guide surface 15 located at a position opposite to the first guide surface 14; a first corner portion 151 disposed on the second guide surface 15; a second corner portion 152 disposed on the second guide surface 15; a middle portion 153 located between the first corner portion 151 and the second corner portion 152 and disposed on the second guide surface 15; and a plurality of optical waveguide channels 16 disposed on the waveguide substrate 11 and extending between the first guide surface 14 and the second guide surface 15. One end of each optical waveguide channel 16 is exposed at the first corner portion 151, the second corner portion 152 or the middle portion 153, and the other end of each optical waveguide channel 16 is exposed at the first guide surface 14.

[0054] Another aspect of the present application provides an optoelectronic system 6, including an optoelectronic device 5, the optoelectronic device 5 includes a main board 50, a carrier board 51 mounted on the main board 50, an electronic integrated circuit 52 mounted on the main board 50; a photonic integrated circuit 3 disposed on the carrier board 51; and a detachable optical coupling structure 100. The optical coupling structure 100 includes a first connector 42 and a second connector 43. The first connector 42 is disposed on the carrier board 51, and includes a base 420 and a waveguide device 421 (1) disposed in the base 420. The waveguide device 1 includes a waveguide substrate 11, the waveguide substrate 11 includes a first guide surface 14 and a second guide surface 15 located at a position opposite to the first guide surface 14, and a plurality of optical waveguide channels 16 disposed on the waveguide substrate 11 and extending between the first guide surface 14 and the second guide surface 15. The first guide surface 14 defines a first light exiting area 140, and the end of the optical waveguide channel 16 is exposed in the first light exiting area 140. The second guide surface 15 defines a second light exiting area 150, and the other end of the optical waveguide channel 16 is exposed in the second light exiting area 150. The overall length of the second light exiting area 150 is less than at least half of the overall length of the first light exiting area 140. The second connector 43 includes an optical fiber assembly 2 (including optical fiber 21 / 431) and is detachably connected to the first connector 42.

[0055] The above embodiments are used to illustrate the technical ideas of the present disclosure, but not to limit the technical ideas of the present disclosure. Therefore, the scope of rights of the present disclosure is not limited to the embodiments. The protection scope of the present disclosure shall be interpreted by the claims, and shall be interpreted as all technical ideas that are the same or equivalent to the above protection scope are included in the scope of rights of the present disclosure.

Claims

1. An optical coupling structure, suitable for photonic integrated circuits, characterized in that: The optical coupling structure comprises: A waveguide device, comprising: a waveguide substrate, comprising a first guide surface and a second guide surface opposite to the first guide surface; and a plurality of optical waveguide channels, the plurality of optical waveguide channels being arranged on the waveguide substrate and extending between the first guide surface and the second guide surface, wherein the first guide surface defines a first light exiting area, and ends of the optical waveguide channels are exposed to the first light exiting area; the second guide surface defines a second light exiting area, and the other ends of the optical waveguide channels are exposed to the second light exiting area; and the overall length of the second light exiting area is less than at least half of the overall length of the first light exiting area; and The optical fiber assembly is connected to the first guiding surface of the waveguide substrate.

2. The optical coupling structure according to claim 1, characterized in that: The waveguide substrate further includes a first corner portion, a second corner portion, and a middle portion located between the first corner portion and the second corner portion and disposed on the second guiding surface, and the second light exiting area is located at the first corner portion, the second corner portion, or the middle portion.

3. The optical coupling structure according to claim 1, characterized in that: The waveguide substrate defines a first region, a second region, and a third region located between the first region and the second region, wherein the optical waveguide channels in the first region are arranged at a first pitch, and the optical waveguide channels in the second region are arranged at a second pitch smaller than the first pitch.

4. The optical coupling structure according to claim 3, characterized in that: The size of the interval between adjacent optical waveguide channels in the third region changes from the first interval to the second interval, so that the optical waveguide channels in the third region have a fan-out configuration and a fan-in configuration.

5. The optical coupling structure according to claim 3, characterized in that: The optical fiber assembly includes a plurality of optical fibers, the number of the optical waveguide channels is equal to the number of the optical fibers, and the optical waveguide channels arranged in the first region are aligned with the optical fibers.

6. The optical coupling structure according to claim 1, characterized in that: The waveguide substrate has a length that is parallel to the first guiding surface and is greater than 20 mm.

7. The optical coupling structure according to claim 1, characterized in that: The thickness of the waveguide substrate is greater than the thickness of the photonic integrated circuit.

8. The optical coupling structure according to claim 1, characterized in that: The optical waveguide channels are arranged in an array on the upper surface of the waveguide device.

9. The optical coupling structure according to claim 1, characterized in that: The waveguide device is made of a material including silicon dioxide, lithium niobate (LiNbO3) or a polymer.

10. The optical coupling structure according to claim 1, characterized in that: The optical waveguide channels are arranged in an array, the overall length of the first light exit area is measured between the two outermost optical waveguide channels relative to the first guiding surface, and the overall length of the second light exit area is measured between the two outermost optical waveguide channels relative to the second guiding surface.

11. A waveguide device suitable for a photonic integrated circuit, characterized in that: The waveguide device comprises: A waveguide substrate, comprising a first guiding surface and a second guiding surface opposite to the first guiding surface; a first corner portion, located on the second guide surface; a second corner portion, located on the second guide surface; a middle portion located between the first corner portion and the second corner portion and located on the second guide surface; and A plurality of optical waveguide channels are arranged on the waveguide substrate and extend between the first guide surface and the second guide surface, wherein one end of each of the optical waveguide channels is exposed at the first corner portion, the second corner portion or the middle portion, and the other end of each of the optical waveguide channels is exposed at the first guide surface.

12. The waveguide device according to claim 11, characterized in that The waveguide substrate defines a first region, a second region and a third region located between the first region and the second region, wherein the optical waveguide channels in the first region are arranged at a first pitch, and the optical waveguide channels in the second region are arranged at a second pitch smaller than the first pitch.

13. The waveguide device according to claim 12, characterized in that The size of the interval between adjacent optical waveguide channels in the third region is changed from the first interval to the second interval, so that the optical waveguide channels in the third region have a fan-out configuration and a fan-in configuration.

14. The waveguide device according to claim 11, characterized in that An optical fiber assembly is connected to the first guiding surface of the waveguide substrate, and the optical fiber assembly includes a plurality of optical fibers whose number is equal to the number of the optical waveguide channels.

15. The waveguide device according to claim 11, characterized in that The waveguide device is made of a material including silicon dioxide, lithium niobate (LiNbO3) or a polymer.

16. The waveguide device according to claim 11, characterized in that The thickness of the waveguide substrate is greater than the thickness of the photonic integrated circuit.

17. A photoelectric system, characterized in that: include: An optoelectronic device comprising a main board, a carrier board mounted on the main board, and an electronic integrated circuit mounted on the main board; A photonic integrated circuit is disposed on the carrier board; as well as A detachable optical coupling structure, wherein the optical coupling structure comprises: The first connector is arranged on the carrier board and includes: a base; and A waveguide device is arranged in the base, the waveguide device comprising: a waveguide substrate, the waveguide substrate comprising a first guide surface and a second guide surface opposite to the first guide surface; and a plurality of optical waveguide channels, the plurality of optical waveguide channels are arranged on the waveguide substrate and extend between the first guide surface and the second guide surface, wherein the first guide surface defines a first light exiting area, and an end of the optical waveguide channel is exposed to the first light exiting area; the second guide surface defines a second light exiting area, and the other end of the optical waveguide channel is exposed to the second light exiting area; and the overall length of the second light exiting area is less than at least half of the overall length of the first light exiting area; and The second connector includes an optical fiber assembly and is detachably connected to the first connector.

18. The photovoltaic system according to claim 17, characterized in that: The waveguide substrate further includes a first corner portion, a second corner portion, and a middle portion located between the first corner portion and the second corner portion and disposed on the second guiding surface, wherein the second light exiting area is located at the first corner portion, the second corner portion or the middle portion.

19. The photovoltaic system according to claim 17, characterized in that: The fiber optic assembly includes a butt joint, and a portion of the optical fiber terminates at an edge of the butt joint proximate to the waveguide device.

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