CN212160160U - Optical fiber array assembly - Google Patents
Optical fiber array assembly Download PDFInfo
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- CN212160160U CN212160160U CN202020964646.2U CN202020964646U CN212160160U CN 212160160 U CN212160160 U CN 212160160U CN 202020964646 U CN202020964646 U CN 202020964646U CN 212160160 U CN212160160 U CN 212160160U
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Abstract
The utility model provides an optical fiber array subassembly, include: the optical waveguide comprises a three-dimensional optical waveguide chip, a single-mode optical fiber array and a multi-mode optical fiber array, wherein an input end waveguide of the three-dimensional optical waveguide chip is connected with the multi-mode optical fiber array, and an output end waveguide of the three-dimensional optical waveguide chip is connected with the single-mode optical fiber array. Therefore, the three-dimensional optical waveguide chip is arranged between the multimode optical fiber array and the single-mode optical fiber array to replace a bent optical fiber between the multimode optical fiber array and the single-mode optical fiber array, the three-dimensional optical waveguide in the three-dimensional optical waveguide chip is utilized to carry out optical signal steering, the production and manufacturing process of the optical fiber array is simplified, and the condition that the reliability of a product is reduced due to the fact that the optical fiber is in a high-bending state due to the fact that the optical fiber is directly bent is avoided.
Description
Technical Field
The utility model relates to an optical fiber communication technical field, in particular to fiber array subassembly.
Background
With the development of optical communication network technology and optical computing, silicon electronics integration technology has received increasing attention. Various optical and electronic devices are integrated on a silicon electronic chip, an optical fiber array is required to be optically coupled with the optical devices on the chip when the silicon electronic chip is applied, and due to space limitation, an ultra-small 90-degree turning optical fiber array is often used.
At present, the 90-degree turning optical fiber array basically bends optical fibers directly in a tiny space, the difficulty of the production and manufacturing process is high, and the optical fibers are always in a high bending stress state, so that the long-term reliability of products is influenced.
SUMMERY OF THE UTILITY MODEL
In view of this, the present invention provides an optical fiber array module, which improves the reliability of the product.
In order to achieve the above purpose, the utility model has the following technical proposal:
a fiber array assembly, comprising:
the optical waveguide comprises a three-dimensional optical waveguide chip, a single-mode optical fiber array and a multi-mode optical fiber array;
the input waveguide end face of the three-dimensional optical waveguide chip is connected with the multimode optical fiber array;
and the output waveguide end face of the three-dimensional optical waveguide chip is connected with the single-mode optical fiber array.
Optionally, the bending angle range of the three-dimensional optical waveguide in the three-dimensional optical waveguide chip is 70-120 °.
Optionally, the bending angle of the three-dimensional optical waveguide is 90 °.
Optionally, the radius range of the three-dimensional optical waveguide is 3-6 mm.
Optionally, the number of the optical fibers of the single-mode optical fiber array ranges from 1 to 32.
A fiber array assembly, comprising:
the device comprises a three-dimensional optical waveguide chip, a polarization-maintaining optical fiber array and a multimode optical fiber array;
the input waveguide end face of the three-dimensional optical waveguide chip is connected with the multimode optical fiber array;
and the output waveguide end surface of the three-dimensional optical waveguide chip is connected with the polarization-maintaining optical fiber array.
Optionally, the bending angle range of the three-dimensional optical waveguide in the three-dimensional optical waveguide chip is 70-120 °.
Optionally, the bending angle of the three-dimensional optical waveguide is 90 °.
Optionally, the radius range of the three-dimensional optical waveguide is 3-6 mm.
Optionally, the number of the optical fibers of the polarization maintaining optical fiber array ranges from 1 to 32.
The embodiment of the utility model provides a pair of fiber array subassembly, include: the optical waveguide comprises a three-dimensional optical waveguide chip, a single-mode optical fiber array and a multi-mode optical fiber array, wherein an input end waveguide of the three-dimensional optical waveguide chip is connected with the multi-mode optical fiber array, and an output end waveguide of the three-dimensional optical waveguide chip is connected with the single-mode optical fiber array. Therefore, the three-dimensional optical waveguide chip is arranged between the multimode optical fiber array and the single-mode optical fiber array to replace a bent optical fiber between the multimode optical fiber array and the single-mode optical fiber array, the three-dimensional optical waveguide in the three-dimensional optical waveguide chip is utilized to carry out optical signal steering, the production and manufacturing process of the optical fiber array is simplified, and the condition that the reliability of a product is reduced due to the fact that the optical fiber is in a high-bending state due to the fact that the optical fiber is directly bent is avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 shows a schematic perspective view of an optical fiber assembly according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an optical fiber array according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a three-dimensional optical waveguide chip according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of another optical fiber array according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of another fiber array according to an embodiment of the invention.
Detailed Description
In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be embodied in other specific forms other than those described herein, and it will be apparent to those skilled in the art that the present invention may be practiced without departing from the spirit and scope of the invention.
As described in the background art, the conventional 90 ° turn optical fiber array basically bends the optical fiber directly in a very small space, the difficulty of the manufacturing process is high, and the optical fiber is always in a high bending stress state, which affects the long-term reliability of the product.
To this end, an embodiment of the present application provides a fiber array assembly, including: the optical waveguide comprises a three-dimensional optical waveguide chip, a single-mode optical fiber array and a multi-mode optical fiber array, wherein an input end waveguide of the three-dimensional optical waveguide chip is connected with the multi-mode optical fiber array, and an output end waveguide of the three-dimensional optical waveguide chip is connected with the single-mode optical fiber array. Therefore, the three-dimensional optical waveguide chip is arranged between the multimode optical fiber array and the single-mode optical fiber array to replace a bent optical fiber between the multimode optical fiber array and the single-mode optical fiber array, the three-dimensional optical waveguide in the three-dimensional optical waveguide chip is utilized to carry out optical signal steering, the production and manufacturing process of the optical fiber array is simplified, and the condition that the reliability of a product is reduced due to the fact that the optical fiber is in a high-bending state due to the fact that the optical fiber is directly bent is avoided.
In order to clearly understand the technical solutions and effects of the embodiments of the present application, the following detailed description of specific embodiments will be made with reference to the accompanying drawings.
Example one
Referring to fig. 1 and 2, fig. 1 is a perspective view showing a fiber array module, and fig. 2 is a sectional view showing the fiber array module, and the fiber array module includes: the optical waveguide comprises a three-dimensional optical waveguide chip 1, a single-mode optical fiber array 2 and a multi-mode optical fiber array;
the input waveguide end face of the three-dimensional optical waveguide chip 1 is connected with the multimode fiber array;
the output waveguide end face of the three-dimensional optical waveguide chip 1 is connected with the single-mode optical fiber array 2.
In the embodiment of the present application, the three-dimensional optical waveguide chip 1 includes the three-dimensional optical waveguide 11 therein, and the three-dimensional optical waveguide 11 performs a steering function. The three-dimensional optical waveguide 11 in the three-dimensional optical waveguide chip 1 may be formed by a laser direct writing waveguide technology, and specifically, the femtosecond laser is focused inside a material, such as glass, crystal, polymer, transparent ceramic, etc., through an objective lens to induce a structural change of the material so as to increase a refractive index thereof, thereby forming a three-dimensional optical waveguide inside the material. In the present embodiment, glass is used as a base for forming the optical waveguide, and for example, oxide glass, fluoride glass, or the like can be used. The femtosecond laser writes in various kinds of glass to change refractive index and core diameter by changing laser irradiation conditions, so as to realize single-mode and multi-mode optical waveguides, and the loss of optical communication waveband is less than 0.5 db/cm.
In this embodiment, referring to fig. 3, the bending angle range of the three-dimensional optical waveguide 11 may be 70 to 120 °, and when the bending angle range is 70 to 120 °, the three-dimensional optical waveguide 11 can realize the turning of the optical signal, and meanwhile, the optical signal cannot be broken due to an excessively small angle, and the occupied area of the three-dimensional optical waveguide chip 1 cannot be large due to an excessively large angle, which affects the overall performance of the integrated circuit. In a specific embodiment, the bending angle of the three-dimensional optical waveguide 11 may be, for example, 90 °. When the bending angle of the three-dimensional optical waveguide 11 is 70-120 degrees, the bending radius can be 3-6 mm, for example, 3mm, so that the volume of the formed three-dimensional optical waveguide chip 1 is small, the volume of a subsequently formed light array component is reduced, and the optical fiber array is suitable for the application occasions of small space of a silicon electronic integrated module.
In the embodiment of the present application, a Single Mode Fiber (Single Mode Fiber) is an optical Fiber whose center glass core is thin and can only transmit one Mode. The single-mode fiber has small intermodal dispersion and has higher requirements on the spectral width and stability of a light source. A multimode optical fiber (multimode optical fiber) is an optical fiber that transmits multiple modes at a given operating wavelength. The transmission modes in the multimode fiber are hundreds, and the propagation constants and the group velocity of each mode are different, so that the multimode fiber has narrow bandwidth, large dispersion and large loss, and is only suitable for fiber communication systems with medium and short distances and small capacity.
In the embodiment of the present application, an input waveguide port 12 of the three-dimensional optical waveguide chip 1 is connected to the multimode fiber array, and an output waveguide port of the three-dimensional optical waveguide chip 1 is connected to the single mode fiber array 2.
In this embodiment, the multimode fiber array is coupled to the input waveguide port 12 of the three-dimensional optical waveguide chip 1, so as to transmit the light of multiple modes into the three-dimensional optical waveguide chip 1, and the three-dimensional optical waveguide 11 in the three-dimensional optical waveguide chip 1 converts the light of multiple modes into light of a single mode. Then, the light in the single mode is transmitted to the single-mode fiber array 2 coupled to the output waveguide port of the three-dimensional optical waveguide chip 1, the three-dimensional optical waveguide 11 in the three-dimensional optical waveguide chip 1 not only realizes the conversion of the optical mode, but also realizes the diversion of the optical signal, for example, the light in the multiple modes input to the three-dimensional optical waveguide 11 is parallel to the input waveguide port 12, and the light in the single mode output to the three-dimensional optical waveguide forms an angle of 90 ° with the input waveguide port 12. Therefore, the optical fiber array formed by coupling and connecting the three-dimensional optical waveguide chip 1, the multimode optical fiber array and the single-mode optical fiber array 2 has smaller volume, and the optical waveguide 11 in the three-dimensional optical waveguide chip 1 is utilized to realize the steering of optical signals, so that the conventional bent optical fiber is replaced to realize the steering of optical signals, and the influence of high stress of the bent optical fiber on the performance reliability of a device is avoided. In a specific embodiment, the number of the optical fibers in the single mode fiber array 2 may range from 1 to 32, for example, 4.
In this embodiment, the method for forming the single-mode fiber array 2 may be that the glass V-shaped groove and the glass are ultrasonically cleaned and dried, and then the glass V-shaped groove is placed in the assembly tool. And stripping the coating layer of the optical fiber with the front end of the single-mode optical fiber ribbon of about 7mm, exposing the optical fiber ribbon inside, and cleaning the exposed optical fiber ribbon. The single-mode optical fiber ribbon is placed into the V-shaped groove, the front position and the rear position of the optical fiber ribbon are adjusted, the exposed optical fiber ribbon is located on the step position of the V-shaped groove, the step position is the position of the V-shaped groove, and the tail of the optical fiber ribbon is temporarily fixed on the clamp to avoid the optical fiber ribbon from being separated from the V-shaped groove. And then, placing the glass cover plate on the glass V-shaped groove and clamping the glass cover plate, injecting ultraviolet curing glue into the joint of the glass cover plate and the end face of the glass V-shaped groove, and curing the ultraviolet curing glue by adopting ultraviolet irradiation when the ultraviolet curing glue is filled in the gap between the glass V-shaped groove and the glass cover plate, so that the glass V-shaped groove, the optical fiber ribbon and the glass cover plate are bonded into a whole to form a single-mode optical fiber array, and taking the single-mode optical fiber array down from an assembling tool. And then, the single-mode fiber array can be placed into a high-temperature furnace for baking so as to completely cure the ultraviolet curing glue, and the end face of the formed single-mode fiber array can be ground so as to be beneficial to subsequent coupling with a waveguide chip.
In this embodiment, the method for forming the optical fiber array assembly may be to clamp the three-dimensional optical waveguide chip 1 and the single-mode optical fiber array 2 on the six-dimensional optical platform, where an end face of the single-mode optical fiber array 2 corresponds to an output end waveguide end face of the three-dimensional optical waveguide chip 1, and as shown in fig. 2, an optical fiber in the single-mode optical fiber array 2 is connected to the laser source. And then clamping the multimode fiber array on a six-dimensional optical platform, wherein the end face of the multimode fiber array is connected with the input waveguide end face of the three-dimensional optical waveguide chip 1, the optical fiber of the multimode fiber array is connected with an optical power meter, and the multimode fiber is used as an optical coupling transition piece. The six-dimensional optical bench can then be adjusted so that the insertion loss and loss uniformity of each fiber meet preset requirements. And then, coating ultraviolet curing glue at the joint of the output waveguide end face of the three-dimensional optical waveguide chip 1 and the end face of the single-mode optical fiber array, irradiating the ultraviolet curing glue at the joint by ultraviolet light to cure the ultraviolet curing glue, connecting the three-dimensional optical waveguide chip 1 and the single-mode optical fiber array 2 together, and finally placing the optical fiber array in a high-temperature furnace for heating and cooling treatment to completely cure the ultraviolet curing glue so that the single-mode optical fiber array 1 is coupled with the three-dimensional optical waveguide chip 1.
An optical fiber array and a method of manufacturing the same according to embodiments of the present application are described in detail above. The embodiment of the present application further provides another optical fiber array, including:
referring to fig. 4 and 5, the three-dimensional optical waveguide chip 1, the polarization maintaining fiber array 2' and the multimode fiber array;
the input waveguide end face 12 of the three-dimensional optical waveguide chip 1 is connected with the multimode fiber array;
the output waveguide end face of the three-dimensional optical waveguide chip 1 is connected with the polarization-maintaining optical fiber array 2'.
In the embodiment of the present application, the three-dimensional optical waveguide chip 1 includes the three-dimensional optical waveguide 11 therein, and the three-dimensional optical waveguide 11 performs a steering function. The three-dimensional optical waveguide 11 in the three-dimensional optical waveguide chip 1 can be prepared and formed by a laser direct-writing waveguide technology. Referring to fig. 3, the bending angle range of the three-dimensional optical waveguide 11 may be 70 to 120 °, and when the bending angle range is 70 to 120 °, the three-dimensional optical waveguide 11 can realize the turning of the optical signal, and meanwhile, the optical signal cannot be broken due to an excessively small angle, and the occupied area of the three-dimensional optical waveguide chip 1 cannot be large due to an excessively large angle, which affects the overall performance of the integrated circuit. In a specific embodiment, the bending angle of the three-dimensional optical waveguide 11 may be, for example, 90 °. When the bending angle of the three-dimensional optical waveguide 11 is 70-120 degrees, the bending radius can be 3-6 mm, for example, 3mm, so that the volume of the formed three-dimensional optical waveguide chip 1 is small, the volume of a subsequently formed light array component is reduced, and the optical fiber array is suitable for the application occasions of small space of a silicon electronic integrated module.
In the embodiment of the application, an input waveguide port of the three-dimensional optical waveguide chip 1 is connected with the multimode fiber array, and an output waveguide port 12 of the three-dimensional optical waveguide chip 1 is connected with the polarization-maintaining fiber array 2'.
In this embodiment, the Polarization-maintaining fiber array 2' (Polarization-main fiber) uses a V-Groove (V-Groove) to mount a Polarization-maintaining fiber ribbon on the array substrate. In the process of drawing the polarization maintaining optical fiber, the structural defects generated in the optical fiber can cause the reduction of polarization maintaining performance, namely when linearly polarized light is transmitted along one characteristic axis of the optical fiber, part of optical signals can be coupled into the other characteristic axis perpendicular to the characteristic axis, and finally the reduction of the polarization extinction ratio of emergent polarized light signals is caused. In the polarization maintaining fiber, the stronger the birefringence effect and the shorter the beat length, the better the polarization state of the transmitted light is maintained.
In this embodiment, the multimode fiber array is coupled to the input waveguide port 12 of the three-dimensional optical waveguide chip 1, so as to transmit light in multiple modes to the three-dimensional optical waveguide chip 1, and the three-dimensional optical waveguide 11 in the three-dimensional optical waveguide chip 1 converts the light in multiple modes into linearly polarized light. And then, the linearly polarized light is transmitted to a polarization-maintaining optical fiber array 2' coupled with an output waveguide port of the three-dimensional optical waveguide chip 1, the three-dimensional optical waveguide 11 in the three-dimensional optical waveguide chip 1 not only realizes the conversion of an optical mode, but also realizes the steering of an optical signal, for example, light of multiple modes input to the three-dimensional optical waveguide 11 is parallel to the input waveguide port 12, and the linearly polarized light of the output three-dimensional optical waveguide forms an included angle of 90 degrees with the input waveguide port 12. Therefore, the optical fiber array formed by coupling and connecting the three-dimensional optical waveguide chip 1, the multimode optical fiber array and the polarization maintaining optical fiber array 2' has smaller volume, and the optical waveguide 11 in the three-dimensional optical waveguide chip 1 is utilized to realize the turning of optical signals, so that the existing bent optical fiber is replaced to realize the turning of optical signals, and the influence of high stress of the bent optical fiber on the performance reliability of the device is avoided. In a specific embodiment, the number of the optical fibers in the polarization maintaining fiber array 2' may range from 1 to 32, and may be 4, for example.
The polarization-maintaining optical fiber array component provided by the embodiment of the application has a smaller volume, is suitable for the application occasions of small space of a silicon electronic integrated module, is simple in forming process and improves the reliability of devices.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments.
The above description is only for the preferred embodiment of the present invention, and although the present invention has been disclosed in the preferred embodiments, it is not intended to limit the present invention. The invention is not limited to the embodiments described herein, but is capable of other embodiments according to the invention, and may be used in various other applications, including, but not limited to, industrial. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical substance of the present invention all fall within the protection scope of the technical solution of the present invention.
Claims (10)
1. A fiber array assembly, comprising:
the optical waveguide comprises a three-dimensional optical waveguide chip, a single-mode optical fiber array and a multi-mode optical fiber array;
the input waveguide end face of the three-dimensional optical waveguide chip is connected with the multimode optical fiber array;
and the output waveguide end face of the three-dimensional optical waveguide chip is connected with the single-mode optical fiber array.
2. The assembly of claim 1, wherein the three-dimensional optical waveguide chip has a bend angle of the three-dimensional optical waveguide in a range of 70-120 °.
3. The assembly of claim 2, wherein the bend angle of the three-dimensional optical waveguide is 90 °.
4. The assembly of claim 1, wherein the three-dimensional optical waveguide has a radius in the range of 3-6 mm.
5. The assembly of claim 1, wherein the array of single mode fibers has a number of fibers in the range of 1 to 32.
6. A fiber array assembly, comprising:
the device comprises a three-dimensional optical waveguide chip, a polarization-maintaining optical fiber array and a multimode optical fiber array;
the input waveguide end face of the three-dimensional optical waveguide chip is connected with the multimode optical fiber array;
and the output waveguide end surface of the three-dimensional optical waveguide chip is connected with the polarization-maintaining optical fiber array.
7. The assembly of claim 6, wherein the three-dimensional optical waveguide chip has a bend angle of the three-dimensional optical waveguide in a range of 70-120 °.
8. The assembly of claim 7, wherein the bend angle of the three-dimensional optical waveguide is 90 °.
9. The assembly of claim 6, wherein the three-dimensional optical waveguide has a radius in the range of 3-6 mm.
10. The assembly of claim 6, wherein the array of polarization maintaining fibers has a number of fibers in the range of 1 to 32.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020964646.2U CN212160160U (en) | 2020-05-29 | 2020-05-29 | Optical fiber array assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020964646.2U CN212160160U (en) | 2020-05-29 | 2020-05-29 | Optical fiber array assembly |
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| CN212160160U true CN212160160U (en) | 2020-12-15 |
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| CN202020964646.2U Active CN212160160U (en) | 2020-05-29 | 2020-05-29 | Optical fiber array assembly |
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