CN209879065U - Optical interface based on optical waveguide chip and optical waveguide component - Google Patents
Optical interface based on optical waveguide chip and optical waveguide component Download PDFInfo
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- CN209879065U CN209879065U CN201921109163.8U CN201921109163U CN209879065U CN 209879065 U CN209879065 U CN 209879065U CN 201921109163 U CN201921109163 U CN 201921109163U CN 209879065 U CN209879065 U CN 209879065U
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Abstract
The utility model discloses an optical interface and an optical waveguide component based on an optical waveguide chip, wherein the optical interface comprises a planar optical waveguide chip, a first ferrule and a guide sleeve; the planar optical waveguide chip is coupled and bonded with the first end of the first insertion core, the guide sleeve is sleeved on the first insertion core, and the second end of the first insertion core is arranged in the guide sleeve; the second end of the first ferrule is configured for aligned coupling with a ferrule on the fiber optic assembly side. In the utility model discloses in, disassemble optical waveguide component for based on planar optical waveguide chip's optical interface and optical fiber assembly two parts, settled the optical interface of easily butt joint on planar optical waveguide chip, its size is controllable, can compatible processes such as automatic paster and routing, treat these processes and accomplish the back, pack optical fiber assembly into the optical interface back again, just can form the light path output, greatly simplified the encapsulation complexity.
Description
Technical Field
The utility model belongs to optoelectronic device encapsulates the field, and more specifically relates to an optical interface and optical waveguide subassembly based on optical waveguide chip.
Background
Big data and cloud computing require the support of high-speed and low-cost data communication optical modules. However, the speed of the 400G optical module is improved by 4 times compared with that of the 100G optical module, and many companies can provide samples, but the application process of the 400G optical module is seriously hindered due to the high price. 50% of the cost of the optical module comes from packaging, and the current packaging process is complex and low in yield, so that the key for reducing the cost of the module is to simplify the packaging process and improve the yield. A mode for improving the packaging yield is to use a planar optical waveguide chip to replace an optical filter component to perform wavelength multiplexing and demultiplexing on 4 paths of optical signals with single wavelength of 100Gb/s, and because the wavelength multiplexing and demultiplexing functions are integrated in the optical waveguide chip, the scheme is simple and reliable compared with the optical filter space optical path scheme. However, the planar optical waveguide chip generally needs to be coupled with an optical fiber to realize input and output of light. After the planar optical waveguide chip and the optical fiber are coupled together, the optical fiber is very not beneficial to automatic production such as chip mounting, routing and the like, so that the improvement of the forms of an optical interface of the planar optical waveguide chip and an optical fiber assembly to facilitate the automatic production is a problem which is continuously researched by engineers in the field.
In view of the above, overcoming the drawbacks of the prior art is an urgent problem in the art.
SUMMERY OF THE UTILITY MODEL
To the above defect or the improvement demand of prior art, the utility model provides an optical interface and optical waveguide subassembly based on optical waveguide chip, its aim at is in the utility model discloses in, disassemble optical waveguide subassembly for optical interface and optical fiber subassembly two parts based on planar optical waveguide chip, settled the optical interface of easily butt joint on planar optical waveguide chip, its size is controllable, processes such as compatible automatic paster and routing, treat these processes and accomplish the back, pack optical fiber subassembly into the optical interface back again, just can form the light path output, the encapsulation complexity has greatly been simplified, solve present optical waveguide subassembly from this because the swing of optic fibre is difficult to the technical problem of preparation.
To achieve the above object, according to one aspect of the present invention, there is provided an optical interface based on an optical waveguide chip, the optical interface including a planar optical waveguide chip 1, a first ferrule 2 and a guide sleeve 3;
the planar optical waveguide chip 1 is coupled and bonded with the first end of the first ferrule 2, the guide sleeve 3 is sleeved on the first ferrule 2, and the second end of the first ferrule 2 is arranged in the guide sleeve 3;
the second end of the first ferrule 2 is used for aligning and coupling with the ferrule on the optical fiber assembly side.
Preferably, the guide sleeve 3 is provided with an opening gap 32, and the opening gap 32 penetrates through the guide sleeve 3 so as to facilitate glue dispensing or glue overflowing; or the like, or, alternatively,
the guide sleeve 3 is provided with a glue leakage port 31, wherein the glue leakage port 31 is arranged adjacent to the coupling end face of the first ferrule 2 and the ferrule on the optical fiber assembly side.
Preferably, the first ferrule 2 is an LC type ferrule, an FC type ferrule or an SC type ferrule, and the guide sleeve 3 is a ferrule.
Preferably, the inner diameter of the guide sleeve 3 is smaller than the outer diameter of the first ferrule 2, so that the guide sleeve 3 and the first ferrule 2 form an interference fit.
Preferably, the planar optical waveguide chip 1 is an arrayed waveguide grating chip, a coupling end surface is arranged at the common port waveguide 6 of the arrayed waveguide grating chip, and the coupling end surface forms an angle of 8 ° ± 1 ° with the vertical direction.
Preferably, the first ferrule 2 is an LC type ferrule, the outer diameter of the first ferrule 2 is 1.249mm ± 0.0005mm, the length of the first ferrule 2 is 3mm ± 0.001mm, and the end face of the first end of the first ferrule 2 is at an angle of 8 ° ± 1 ° with the vertical direction.
To achieve the above object, according to an aspect of the present invention, there is provided an optical waveguide assembly, the optical waveguide assembly includes an optical fiber assembly and the optical interface, the optical fiber assembly includes a second ferrule 4, the second ferrule 4 is inserted into the guide sleeve 3, and then aligned with the second end of the first ferrule 2.
Preferably, the outer diameters of the second ferrule 4 and the first ferrule 2 are the same, and the end faces of the second ferrule 4 and the first ferrule 2 coupled to each other have the same surface type.
Preferably, the sum of the lengths of the first ferrule 2 and the second ferrule 4 is greater than the length of the guide sleeve 3.
Preferably, the first ferrule 2 and/or the second ferrule 4 are movably arranged inside the guide sleeve 3; or the like, or, alternatively,
the first ferrule 2 and/or the second ferrule 4 are fixed inside the guide sleeve 3 by glue.
Generally, through the utility model discloses above technical scheme who conceives compares with prior art, has following beneficial effect: the utility model provides an optical interface and an optical waveguide component based on an optical waveguide chip, wherein the optical interface comprises a planar optical waveguide chip, a first ferrule and a guide sleeve; the planar optical waveguide chip is coupled and bonded with the first end of the first insertion core, the guide sleeve is sleeved on the first insertion core, and the second end of the first insertion core is arranged in the guide sleeve; the second end of the first ferrule is configured for aligned coupling with a ferrule on the fiber optic assembly side. In the utility model discloses in, disassemble optical waveguide component for the optical interface and the optical fiber component two parts based on planar optical waveguide chip, settled the optical interface of easily butt joint on planar optical waveguide chip, its size is controllable, can not rock moreover, can compatible automatic processes such as paster and routing, treat these processes and accomplish the back, pack optical fiber component into the optical interface back again, just can form the light path output, greatly simplified the encapsulation complexity.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below. It is obvious that the drawings described below are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be obtained from these drawings without inventive effort.
Fig. 1 is a schematic structural diagram of an optical waveguide assembly according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an optical interface according to an embodiment of the present invention;
fig. 3 is a schematic cross-sectional view of an optical interface according to an embodiment of the present invention;
fig. 4a is a schematic structural diagram of another optical interface provided in an embodiment of the present invention;
fig. 4b is a schematic structural diagram of another optical interface provided by the embodiment of the present invention;
fig. 5 is a schematic structural diagram of an optical waveguide assembly according to an embodiment of the present invention;
fig. 6 is a schematic cross-sectional structure diagram of an optical waveguide assembly according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the description of the present invention, the terms "inside", "outside", "longitudinal", "lateral", "up", "down", "top", "bottom", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of describing the present invention but do not require that the present invention must be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.
Furthermore, the technical features mentioned in the embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.
Example 1:
fig. 1 is a schematic structural diagram of an optical component based on a planar optical waveguide chip in a conventional scheme, the optical waveguide chip and an optical fiber component are directly coupled and fixed together, since an optical fiber is easy to swing, and the length precision of the optical fiber can only be controlled to be about ± 1 mm. Therefore, after the optical assembly is placed on the module, because the optical fiber is easy to swing, the subsequent processes of surface mounting, routing, fiber coiling and the like are difficult to realize automatic production, and the manufacturing difficulty is high.
In order to solve the foregoing problems, the present embodiment improves the forms of the optical interface and the optical fiber assembly based on the planar optical waveguide chip, so that the present embodiment is beneficial to automated production. In this embodiment, disassemble optical waveguide assembly for optical interface and optical fiber assembly two parts based on planar optical waveguide chip, the optical interface of easily butt joint has been settled on planar optical waveguide chip, when making optical interface, carry out the technology of paster and routing, because the size of each part that optical interface contains is all controllable, and can not rock owing to the optic fibre production, can avoid the condition of the paster or routing of being not convenient for that leads to because optic fibre rocks, be convenient for realize processes such as automatic paster and routing, treat these processes and accomplish the back, load optical fiber assembly into optical interface again after, form optical waveguide assembly, the encapsulation complexity has greatly been simplified.
Referring to fig. 2 and 3, the optical interface of the present embodiment includes a planar optical waveguide chip 1, a first ferrule 2, and a guide sleeve 3; the planar optical waveguide chip 1 is coupled and bonded with the first end of the first ferrule 2, the guide sleeve 3 is sleeved on the first ferrule 2, and the second end of the first ferrule 2 is arranged in the guide sleeve 3; the second end of the first ferrule 2 is used for aligning and coupling with the ferrule on the optical fiber assembly side.
The first ferrule 2 is an LC type ceramic ferrule, an FC type ceramic ferrule or an SC type ceramic ferrule, and the guide sleeve 3 is a ceramic sleeve.
In this embodiment, the planar optical waveguide chip 1 and the first end of the first ferrule 2 are fixed together by glue.
In an alternative scheme, the first ferrule 2 and the guide sleeve 3 can be fixedly connected through glue to ensure the structural stability. In another alternative, to facilitate the repair and disassembly, the structure may be kept stable only by the interference fit between the guide sleeve 3 and the first ferrule 2, in which case the first ferrule 2 and the guide sleeve 3 form a movable connection, and the first ferrule 2 may be inserted into the guide sleeve 3 or the first ferrule 2 may be removed from the guide sleeve 3 by a certain insertion and extraction force. In particular, the inner diameter of the guide sleeve 3 is smaller than the outer diameter of the first ferrule 2, so that the guide sleeve 3 and the first ferrule 2 form an interference fit.
In a specific application scenario, the planar optical waveguide chip 1 is an arrayed waveguide grating chip, and can realize multiplexing and demultiplexing of four wavelengths of 1271nm, 1291nm, 1311nm and 1331 nm. With reference to fig. 6, a coupling end surface is disposed at the common port waveguide 6 of the arrayed waveguide grating chip, and the coupling end surface forms an angle of 8 ° ± 1 ° with the vertical direction in order to reduce light path reflection. The first ferrule 2 is an LC type ferrule, the outer diameter of the first ferrule 2 is 1.249mm ± 0.0005mm, the length of the first ferrule 2 is 3mm ± 0.001mm, and an end face where a first end of the first ferrule 2 is located forms an angle of 8 ° ± 1 ° with a vertical direction, that is, θ is 8 ° ± 1 °. After the first ferrule 2 and the array waveguide grating are coupled and aligned, they are fixed by glue. The guide sleeve 3 is an opening ceramic sleeve matched with the LC ceramic ferrule, the inner diameter range of the guide sleeve 3 is 1.248nm +/-0.0005 mm, and the inner diameter of the guide sleeve 3 is slightly smaller than the outer diameter of the first ferrule 2, so that interference fit is formed, and certain plugging force is favorably formed. The length of the guide sleeve 3 is c ═ 5mm +/-0.001 mm, the depth of the guide sleeve 3 sleeved into the first ferrule 2 is 2mm, and thus a space of 3mm is reserved in the guide sleeve 3 to reserve a space for the ferrules on the optical fiber assembly side.
In an actual application scenario, when the first ferrule 2 and the ferrule on the optical fiber assembly side are fixedly connected with the guide sleeve 3 through glue, if the glue is applied too much, a glue area is formed on the coupling end face corresponding to the first ferrule 2 and the ferrule on the optical fiber assembly side, which affects transmission of an optical path.
In order to solve the foregoing problem, as shown in fig. 2, in an alternative scheme, the guide sleeve 3 is an opening sleeve, and specifically, an opening gap 32 is provided on the guide sleeve 3, and the opening gap 32 penetrates through the guide sleeve 3, so as to facilitate dispensing or glue overflow.
In order to solve the foregoing problem, in another alternative, referring to fig. 4a, the guide sleeve 3 is provided with a glue leakage port 31, wherein the glue leakage port 31 is provided adjacent to a coupling end surface of the first ferrule 2 and the ferrule on the optical fiber assembly side. In this embodiment, the excessive glue may overflow from the glue leakage opening 31, so as to avoid forming a glue region at the coupling end surface, and in addition, the glue leakage opening 31 is not disposed at the position opposite to the coupling end surface as far as possible, so as to prevent the glue from remaining near the glue leakage opening 31 during the glue leakage process, thereby affecting the optical path transmission.
Alternatively, the guide sleeve 3 may be constructed in another configuration by combining the opening slit 32 shown in fig. 2 with the glue leakage port 31 shown in fig. 4 a. As shown in fig. 4b, the guide sleeve 3 is an open sleeve, an open gap 32 is disposed on the guide sleeve 3, the open gap 32 penetrates through the guide sleeve 3, and a glue leakage port 31 is disposed on the guide sleeve 3, wherein the glue leakage port 31 is disposed adjacent to a coupling end surface of the first ferrule 2 and the ferrule on the optical fiber assembly side. Glue is dispensed through the opening gap 32, and glue overflowing through the opening gap 32 and the glue leakage opening 31 avoids glue deposition on one side far away from the opening gap 32.
Example 2:
based on the optical interface of embodiment 1, this embodiment provides an optical waveguide assembly, which includes an optical fiber assembly and the optical interface of embodiment 1, referring to fig. 5, the optical fiber assembly includes a second ferrule 4 and an optical element 5 with an optical fiber, the second ferrule 4 is connected to the optical element 5 with an optical fiber, and the second ferrule 4 is inserted into the guide sleeve 3 and then coupled and aligned with the second end of the first ferrule 2. In this implementation, optical fiber assembly and optical interface have constituted the novel optical assembly with the same function of traditional optical assembly jointly, but because optical interface does not have optic fibre, all are fixed subassemblies, and size precision is also high, so be particularly suitable for automated production, reduced the degree of difficulty of preparation, be favorable to reducing the encapsulation cost. In the present embodiment, in order to facilitate coupling alignment, the outer diameters of the second ferrule 4 and the first ferrule 2 are the same, and the end surfaces of the second ferrule 4 and the first ferrule 2 coupled to each other have the same surface type. Wherein, the second ferrule 4 is an LC type ferrule, an FC type ferrule or an SC type ferrule.
In an alternative, the second ferrule 4 and the guide sleeve 3 may be fixedly connected by glue to ensure structural stability. In another alternative, to facilitate the repair and disassembly, the structure may be kept stable only by the interference fit between the guide sleeve 3 and the second ferrule 4, in which case the second ferrule 4 and the guide sleeve 3 form a movable connection therebetween, and the second ferrule 4 may be inserted into the guide sleeve 3 or the second ferrule 4 may be removed from the guide sleeve 3 by a certain insertion and extraction force. In particular, the inner diameter of the guide sleeve 3 is smaller than the outer diameter of the second ferrule 4, so that the guide sleeve 3 and the second ferrule 4 form an interference fit.
Based on the above embodiment 1, the following optional combinations exist in the coupling relationship among the first ferrule 2, the second ferrule 4 and the guide sleeve 3: (1) the first ferrule 2 and the second ferrule 4 are movably arranged in the guide sleeve 3; (2) the first ferrule 2 is movably arranged in the guide sleeve 3, and the second ferrule 4 is fixed in the guide sleeve 3 through glue; (3) the second ferrule 4 is movably arranged in the guide sleeve 3, and the first ferrule 2 is fixed in the guide sleeve 3 through glue; (4) the first ferrule 2 and the second ferrule 4 are fixed in the guide sleeve 3 by glue. The first ferrule 2 and the second ferrule 4 are movably arranged in the guide sleeve 3 in an interference fit mode.
In a practical application scenario, the sum of the lengths of the first ferrule 2 and the second ferrule 4 is greater than the length of the guide sleeve 3. A set of optional parameter combinations is provided below, and with reference to fig. 6, a coupling end surface is disposed at the common port waveguide 6 of the arrayed waveguide grating chip, and the coupling end surface forms an angle of 8 ° ± 1 ° with the vertical direction in order to reduce optical path reflection. The first ferrule 2 is an LC type ceramic ferrule, the outer diameter of the first ferrule 2 is 1.249mm +/-0.0005 mm, the length of the first ferrule 2 is 3mm +/-0.001 mm, and the end face where the first end of the first ferrule 2 is located is at an angle of 8 +/-1 degrees with the vertical direction. After the first ferrule 2 and the array waveguide grating are coupled and aligned, they are fixed by glue. The guide sleeve 3 is an opening ceramic sleeve matched with the LC ceramic ferrule, the inner diameter range of the guide sleeve 3 is 1.248mm +/-0.0005 mm, and the inner diameter of the guide sleeve 3 is slightly smaller than the outer diameter of the first ferrule 2, so that interference fit is formed, and certain plugging force is favorably formed. The length of the guide sleeve 3 is c ═ 5mm +/-0.001 mm, the depth of the guide sleeve 3 sleeved into the first ferrule 2 is 2mm, and thus a space of 3mm is reserved in the guide sleeve 3 to reserve a space for the ferrules on the optical fiber assembly side. One end of the optical fiber assembly is provided with a second ferrule 4 with the same outer diameter and surface type as the first ferrule 2, and the other end is provided with any other optical element with optical fibers. The second ferrule 4 has a length b of 3.5mm and a PC surface type, and has a length enough to be inserted into the guide sleeve 3 and brought into close contact with the end face of the first ferrule.
Due to the extremely high guiding fit precision between the guiding sleeve 3 and the ferrule, the second ferrule 4 is aligned with the first ferrule 2 and the common waveguide after being inserted into the guiding sleeve 3, and an output optical path is formed.
In this embodiment, disassemble optical waveguide assembly for optical interface and optical fiber assembly two parts based on planar optical waveguide chip 1, settled the optical interface of easily butt joint on planar optical waveguide chip 1, its size is controllable, can compatible processes such as automatic paster and routing, treat these processes and accomplish the back, pack optical fiber assembly into the optical interface back again, just can form the light path output, can avoid the condition of the paster or routing of being not convenient for that leads to because optic fibre rocks, greatly simplified the encapsulation complexity.
It will be understood by those skilled in the art that the foregoing is merely a preferred embodiment of the present invention, and is not intended to limit the invention to the particular forms disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. An optical interface based on an optical waveguide chip, characterized in that the optical interface comprises a planar optical waveguide chip (1), a first ferrule (2) and a guide sleeve (3);
the planar optical waveguide chip (1) is coupled and bonded with the first end of the first ferrule (2), the guide sleeve (3) is sleeved on the first ferrule (2), and the second end of the first ferrule (2) is arranged in the guide sleeve (3);
the second end of the first ferrule (2) is used for aligning and coupling with the ferrule on the optical fiber assembly side.
2. The optical interface according to claim 1, wherein the guiding sleeve (3) is provided with an opening slit (32), and the opening slit (32) penetrates through the guiding sleeve (3) to facilitate glue dispensing or glue overflowing; or the like, or, alternatively,
the guide sleeve (3) is provided with a glue leakage opening (31), wherein the glue leakage opening (31) is arranged close to the coupling end face of the first ferrule (2) and the ferrule on the optical fiber assembly side.
3. Optical interface according to claim 1, characterized in that said first ferrule (2) is an LC, FC or SC ferrule and said guide sleeve (3) is a ferrule.
4. The optical interface according to claim 1, characterized in that the inner diameter of the guide sleeve (3) is smaller than the outer diameter of the first ferrule (2) so that the guide sleeve (3) and the first ferrule (2) form an interference fit.
5. The optical interface according to claim 1, wherein the planar optical waveguide chip (1) is an arrayed waveguide grating chip, and a coupling end surface is disposed at the common port waveguide (6) of the arrayed waveguide grating chip, and the coupling end surface forms an angle of 8 ° ± 1 ° with a vertical direction.
6. The optical interface according to claim 5, wherein the first ferrule (2) is an LC-type ferrule, the outer diameter of the first ferrule (2) is 1.249mm ± 0.0005mm, the length of the first ferrule (2) is 3mm ± 0.001mm, and the end face of the first end of the first ferrule (2) is at an angle of 8 ° ± 1 ° with respect to the vertical direction.
7. An optical waveguide assembly, characterized in that it comprises an optical fiber assembly and an optical interface according to any one of claims 1 to 6, said optical fiber assembly comprising a second ferrule (4), said second ferrule (4) being coupled aligned with the second end of said first ferrule (2) after being inserted into said guide sleeve (3).
8. Optical waveguide assembly according to claim 7, characterized in that the outer diameter of the second ferrule (4) is the same as the outer diameter of the first ferrule (2), and the end faces of the second ferrule (4) and the first ferrule (2) that are coupled to each other have the same face type.
9. Optical waveguide assembly according to claim 7, characterized in that the sum of the lengths of the first ferrule (2) and the second ferrule (4) is greater than the length of the guide sleeve (3).
10. Optical waveguide assembly according to claim 7, characterized in that the first ferrule (2) and/or the second ferrule (4) is movably arranged within the guide sleeve (3); or the like, or, alternatively,
the first ferrule (2) and/or the second ferrule (4) is fixed in the guide sleeve (3) by glue.
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| CN201921109163.8U CN209879065U (en) | 2019-07-16 | 2019-07-16 | Optical interface based on optical waveguide chip and optical waveguide component |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113959952A (en) * | 2021-12-21 | 2022-01-21 | 中山大学 | Waterproof packaging structure and method for photoacoustic detection chip and optical fiber end face |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113959952A (en) * | 2021-12-21 | 2022-01-21 | 中山大学 | Waterproof packaging structure and method for photoacoustic detection chip and optical fiber end face |
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