CN111474641A - Fan-out joint assembly of multi-core optical fiber - Google Patents
Fan-out joint assembly of multi-core optical fiber Download PDFInfo
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- CN111474641A CN111474641A CN202010477645.XA CN202010477645A CN111474641A CN 111474641 A CN111474641 A CN 111474641A CN 202010477645 A CN202010477645 A CN 202010477645A CN 111474641 A CN111474641 A CN 111474641A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/36—Mechanical coupling means
- G02B6/40—Mechanical coupling means having fibre bundle mating means
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
- G02B6/12—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
- G02B6/122—Basic optical elements, e.g. light-guiding paths
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
- G02B6/12—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
- G02B2006/12133—Functions
- G02B2006/12147—Coupler
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Optical Couplings Of Light Guides (AREA)
Abstract
The invention provides a fan-out joint assembly of multi-core optical fiber, comprising: the optical fiber module comprises a three-dimensional waveguide chip, a multi-core optical fiber head and a single-mode optical fiber array, wherein the input end of the three-dimensional waveguide chip is connected with the multi-core optical fiber head, and the output end of the three-dimensional waveguide chip is connected with the single-mode optical fiber array. Like this, be connected through three-dimensional waveguide chip's input and multicore fiber head, three-dimensional waveguide chip's output and single mode fiber array are connected, utilize three-dimensional waveguide chip to be the multicore distribution of two-dimensional arrangement in with the multicore fiber head and distribute for being the multicore of one-dimensional array, then aim at the coupling with single mode fiber array, form the multicore optic fibre fan-out joint subassembly that the structure is comparatively simple, reduce the manufacturing degree of difficulty to can be used for batch production.
Description
Technical Field
The invention relates to the technical field of optical fiber communication, in particular to a fan-out joint component of a multi-core optical fiber.
Background
A Multi-Core Fiber (MCF) is a novel optical Fiber in which a plurality of independent cores are present in a common cladding region, each Core operates in a single-mode state, and can realize long-distance low-crosstalk space division multiplexing optical signal transmission, and is very suitable for transmitting large-capacity optical information.
The existing method for preparing the multi-core optical fiber has higher operation difficulty when the number of cores is more, and is difficult to carry out batch production.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a fan-out connector assembly for a multi-core optical fiber, which is simple to manufacture and can be manufactured in batch.
In order to achieve the purpose, the invention has the following technical scheme:
a fanout splice assembly for multi-core optical fibers, comprising:
the optical fiber module comprises a three-dimensional waveguide chip, a multi-core optical fiber head and a single-mode optical fiber array;
the input end of the three-dimensional waveguide chip is connected with the multi-core optical fiber head;
and the output end of the three-dimensional waveguide chip is connected with the single-mode fiber array.
Optionally, the three-dimensional waveguide chip includes three-dimensional optical waveguides, the three-dimensional optical waveguides at the input end are arranged in two dimensions, and the three-dimensional optical waveguides at the output end are arranged in one dimension.
Optionally, the multi-core optical fiber head includes: a multi-core fiber and a square glass capillary;
the multi-core optical fiber is positioned in the square glass capillary tube.
Optionally, the number of the cores of the multi-core optical fiber ranges from 4 to 32.
Optionally, the number of waveguides of the three-dimensional optical waveguide is the same as the number of cores of the multi-core optical fiber in the multi-core optical fiber head.
Optionally, the number of the cores of the multi-core fiber is 4, the multi-core fiber includes 4 single-mode waveguides, and the 4 single-mode waveguides are arranged in a matrix.
Optionally, the three-dimensional optical waveguides at the input end are arranged in a matrix.
Optionally, the number of the cores of the multi-core fiber is 7, the multi-core fiber includes 7 single-mode waveguides, and the 7 single-mode waveguides are arranged in a circle and a circle center.
Optionally, the three-dimensional optical waveguides at the input end are arranged in a circle and a circle center.
Optionally, the connecting the multi-core fiber head with the input end of the three-dimensional waveguide chip, and the connecting the output end of the three-dimensional waveguide chip with the single-mode fiber array includes:
the multi-core optical fiber head is connected with the input end of the three-dimensional waveguide chip through bonding ultraviolet glue, and the output end of the three-dimensional waveguide chip is connected with the single-mode optical fiber array through bonding ultraviolet glue.
The embodiment of the invention provides a fan-out joint component of a multi-core optical fiber, which comprises: the optical fiber module comprises a three-dimensional waveguide chip, a multi-core optical fiber head and a single-mode optical fiber array, wherein the input end of the three-dimensional waveguide chip is connected with the multi-core optical fiber head, and the output end of the three-dimensional waveguide chip is connected with the single-mode optical fiber array. Like this, be connected through three-dimensional waveguide chip's input and multicore fiber head, three-dimensional waveguide chip's output and single mode fiber array are connected, utilize three-dimensional waveguide chip to be the multicore distribution of two-dimensional arrangement in with the multicore fiber head and distribute for being the multicore of one-dimensional array, then aim at the coupling with single mode fiber array, form the multicore optic fibre fan-out joint subassembly that the structure is comparatively simple, reduce the manufacturing degree of difficulty to can be used for batch production.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are 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 illustrates a schematic structural diagram of a fan-out joint assembly for multi-core optical fibers, according to an embodiment of the invention;
FIG. 2 is a schematic diagram showing a three-dimensional structure of a three-dimensional waveguide chip according to an embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view of a multi-core optical fiber according to an embodiment of the present invention;
fig. 4 is a schematic cross-sectional view of a multi-core optical fiber according to an embodiment of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
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 practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
As described in the background art, the conventional method for manufacturing a multi-core optical fiber has a large number of cores, and is difficult to operate and manufacture in batch.
To this end, the present application provides a fan-out connector assembly of multicore fibers, including: the optical fiber module comprises a three-dimensional waveguide chip, a multi-core optical fiber head and a single-mode optical fiber array, wherein the input end of the three-dimensional waveguide chip is connected with the multi-core optical fiber head, and the output end of the three-dimensional waveguide chip is connected with the single-mode optical fiber array. Like this, be connected through three-dimensional waveguide chip's input and multicore fiber head, three-dimensional waveguide chip's output and single mode fiber array are connected, utilize three-dimensional waveguide chip to be the multicore distribution of two-dimensional arrangement in with the multicore fiber head and distribute for being the multicore of one-dimensional array, then aim at the coupling with single mode fiber array, form the multicore optic fibre fan-out joint subassembly that the structure is comparatively simple, reduce the manufacturing degree of difficulty to can be used for batch production.
In order to facilitate understanding of the technical solutions and effects of the present application, specific embodiments will be described in detail below with reference to the accompanying drawings.
Referring to fig. 1 and 2, an embodiment of the present application provides a fan-out connector assembly for multi-core optical fibers, including:
the optical fiber array comprises a three-dimensional waveguide chip 1, a multi-core optical fiber head 2 and a single-mode optical fiber array 3;
the input end 12 of the three-dimensional waveguide chip 1 is connected with the multi-core optical fiber head 2;
the output end 13 of the three-dimensional waveguide chip 1 is connected with the single-mode fiber array 3.
In the embodiment of the present application, the three-dimensional waveguide chip 1 includes three-dimensional optical waveguides 11, the three-dimensional optical waveguides 11 at the input end 12 of the three-dimensional waveguide chip 1 are arranged in two dimensions, and the three-dimensional optical waveguides 11 at the output end 13 of the three-dimensional waveguide chip 1 are arranged in one dimension, as shown in fig. 2, fig. 2 is a three-dimensional structure diagram of the three-dimensional waveguide chip 1. The three-dimensional waveguide chip 1 converts the two-dimensionally arranged multi-core distribution into a one-dimensionally arranged multi-core distribution. In this embodiment, the three-dimensional optical waveguide 11 may be prepared by a laser direct writing waveguide technology, 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 to increase a refractive index thereof, so as to form 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 the embodiment of the present application, the multicore fiber head 2 is used to carry a multicore fiber. For example, the multi-core fiber head 2 includes: the optical fiber array comprises a multi-core optical fiber and a square glass capillary tube, wherein the multi-core optical fiber is positioned in the square glass capillary tube. Multicore fibers are a new type of optical fiber in which multiple individual cores are present in a common cladding region. The fluorine-doped cladding refractive index profile structure can be adopted to realize the long-distance low-crosstalk space division multiplexing optical signal transmission. The multi-core optical fiber based on the space division multiplexing concept can simultaneously transmit multiple optical signals in one optical fiber, and can greatly improve the communication capacity so as to break through the transmission capacity limit of the current common single-mode optical fiber. In the present embodiment, the number of cores of the multi-core optical fiber may range from 4 to 32, and may be, for example, 4, 7, 16, or the like.
In a specific embodiment, the method for forming the multi-core optical fiber head 2 may be that the multi-core optical fiber is inserted into the square glass capillary and protrudes from the square glass capillary by 3-5 mm, then the multi-core optical fiber is fixed in the square glass capillary by glue, and after the multi-core optical fiber is fixed, the multi-core optical fiber protruding from the square glass capillary is ground and removed, so that the end surface of the multi-core optical fiber is flush with the end surface of the square glass capillary, and is convenient for subsequent alignment coupling with the waveguide chip.
In this embodiment, the number of waveguides in the three-dimensional optical waveguide 11 is the same as the number of cores in the multi-core optical fiber, so that the three-dimensional optical waveguide and the multi-core optical fiber are completely coupled, and transmission of optical signals is facilitated. For example, the number of cores of the multi-core fiber may be 4, the multi-core fiber includes 4 single-mode waveguides, the 4 single-mode waveguides are arranged in a matrix, as shown in fig. 3, and fig. 3 is a cross-sectional view of the 4-core multi-core fiber. When 4 single mode waveguides in the multi-core optical fiber are arranged in a matrix, the three-dimensional optical waveguides 11 at the input end 12 of the three-dimensional waveguide chip 1 are also arranged in a matrix. The number of cores of the multi-core fiber may also be 7, the multi-core fiber includes 7 single-mode waveguides, the 7 single-mode waveguides are arranged in a circle and a circle center, as shown in fig. 4, and fig. 4 is a cross-sectional view of the 7-core fiber. When 7 single mode waveguides in the multi-core optical fiber are arranged in a circle and a circle center, the three-dimensional optical waveguides 11 at the input end 12 of the three-dimensional waveguide chip 1 are also arranged in a circle and a circle center.
In the embodiment of the present application, a Single Mode Fiber (Single Mode Fiber) in the Single Mode Fiber array 3 is a Fiber whose central glass core is very 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.
In this embodiment, the method for forming the single-mode fiber array 3 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. Then, the single-mode fiber array can be placed into an oven at about 85 ℃ 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 the embodiment of the present application, the input end 12 of the three-dimensional waveguide chip 1 is connected to the multi-core fiber head 2, and the output end 13 of the three-dimensional waveguide chip 1 is connected to the single-mode fiber array 3.
In this embodiment, the input end 12 of the three-dimensional waveguide chip 1 is connected with the multi-core fiber head 2, the multi-core distribution that is two-dimensionally arranged in the multi-core fiber head 2 is converted into the multi-core distribution that is one-dimensionally arranged by using the three-dimensional waveguide chip 1, and then the output end 13 of the three-dimensional waveguide chip 1 is connected with the single-mode fiber array 3, so that a multi-core fiber fan-out joint assembly with a simpler structure is formed, the manufacturing difficulty is reduced, and the multi-core fiber fan-out joint assembly.
In this embodiment, the method for forming the multi-core optical fiber fan-out connector assembly may be to provide a six-dimensional optical adjustment system, where the six-dimensional optical adjustment system includes a chip fixing base in the middle, two six-dimensional precise optical adjustment frames are respectively provided at two sides, and a corresponding laser light source, a two-channel optical power meter, an ultraviolet curing system, a CCD camera monitoring system, an illumination light source, and a shockproof optical platform are configured at the same time. And then, cleaning the input end 12 and the output end 13 of the three-dimensional waveguide chip 1, and installing the three-dimensional waveguide chip 1 on a chip fixing seat of a six-dimensional optical adjusting system, wherein the output end 13 of the three-dimensional waveguide chip 1 can be arranged on the left side, and the input end 12 can be arranged on the right side. Then, the multi-core optical fiber head 2 is loaded on an optical fiber array clamp on an optical adjusting frame on the right side of the six-dimensional optical adjusting system and is aligned with a detecting head of the optical power meter. Subsequently, the single mode fiber array 3 is loaded on the fiber array jig of the optical adjusting rack on the left side of the six-dimensional optical adjusting system, and the two channel fibers respectively at the extreme edges are connected to the laser source. Under the observation of a CCD camera monitoring system, the insertion loss value of the optical power meter is monitored, and the six-dimensional precise optical adjusting frames on the two sides are continuously adjusted, so that the insertion loss value reaches a preset value, when the insertion loss value reaches the preset value, the waveguide alignment of the multi-core optical fiber head 2 and the waveguide alignment of the input end 12 of the three-dimensional waveguide chip 1 is shown, and the waveguide alignment of the channel optical fiber at the edge of the single-mode optical fiber array 3 and the waveguide alignment of the output end 13 of the three-dimensional waveguide chip 1 is shown. Then, other channel fibers of the single-mode fiber array are respectively connected into the laser source, the insertion loss value of the laser source is detected, and the optical adjusting frame can be finely adjusted if necessary, so that the loss values of all the channels are balanced. In this embodiment, after the positions of the three-dimensional waveguide chip 1, the multi-core fiber head 2, and the single-mode fiber array 3 are adjusted, ultraviolet glue may be coated at a joint of the multi-core fiber head 2 and the input end 12 of the three-dimensional waveguide chip 1, ultraviolet glue may be coated at a joint of the output end 13 of the three-dimensional waveguide chip 1 and the single-mode fiber array 3, and then the coated ultraviolet glue is irradiated with ultraviolet light, so that the ultraviolet glue is cured, the multi-core fiber head 2 and the input end 12 of the three-dimensional waveguide chip 1 are connected together, and the output end 13 of the three-dimensional waveguide chip 1 and the single-mode fiber array 3 are connected together, thereby forming a fan-. The fan-out connector assembly of the multi-core optical fiber can also be placed in an oven at 85 ℃ for high-temperature baking, so that the ultraviolet glue is completely cured.
The fan-out joint component of the multi-core optical fiber provided by the embodiment of the application is described in detail, the component is connected with the multi-core optical fiber head through the input end of the three-dimensional waveguide chip, the output end of the three-dimensional waveguide chip is connected with the single-mode optical fiber array, the multi-core distribution which is two-dimensionally arranged in the multi-core optical fiber head is converted into multi-core distribution which is one-dimensional array by using the three-dimensional waveguide chip, then the multi-core optical fiber fan-out joint component is aligned and coupled with the single-mode optical fiber array, the multi-core optical fiber fan-out joint component with a.
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 foregoing is only a 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. Those skilled in the art can make numerous possible variations and modifications to the present teachings, or modify equivalent embodiments to equivalent variations, without departing from the scope of the present teachings, using the methods and techniques disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are still within the scope of the protection of the technical solution of the present invention, unless the contents of the technical solution of the present invention are departed.
Claims (10)
1. A fanout splice assembly for multi-core optical fibers, comprising:
the optical fiber module comprises a three-dimensional waveguide chip, a multi-core optical fiber head and a single-mode optical fiber array;
the input end of the three-dimensional waveguide chip is connected with the multi-core optical fiber head;
and the output end of the three-dimensional waveguide chip is connected with the single-mode fiber array.
2. The assembly of claim 1, wherein the three-dimensional waveguide chip comprises three-dimensional optical waveguides, the three-dimensional optical waveguides of the input end being arranged in two dimensions, and the three-dimensional optical waveguides of the output end being arranged in one dimension.
3. The assembly of claim 1, wherein the multicore fiber head comprises: a multi-core fiber and a square glass capillary;
the multi-core optical fiber is positioned in the square glass capillary tube.
4. The assembly of claim 3, wherein the multicore optical fiber has a core number in a range of 4 to 32.
5. The assembly of claim 3, wherein the three-dimensional optical waveguide has the same number of waveguides as the number of cores of the multi-core optical fiber.
6. The assembly of any of claims 3-5, wherein the multicore fiber has a core number of 4, the multicore fiber comprising 4 single mode waveguides, the 4 single mode waveguides arranged in a matrix.
7. The assembly of claim 6, wherein the three-dimensional optical waveguides of the input end are arranged in a matrix.
8. The assembly of any of claims 3-5, wherein the multicore fiber has a core count of 7, the multicore fiber comprising 7 single mode waveguides, the 7 single mode waveguides being arranged circumferentially and concentrically.
9. The assembly of claim 8, wherein the three-dimensional optical waveguides of the input end are arranged circumferentially and concentrically.
10. The assembly of claim 1, wherein the connection of the multicore fiber tip to the input end of the three-dimensional waveguide chip and the connection of the output end of the three-dimensional waveguide chip to the single-mode fiber array comprises:
the multi-core optical fiber head is connected with the input end of the three-dimensional waveguide chip through bonding ultraviolet glue, and the output end of the three-dimensional waveguide chip is connected with the single-mode optical fiber array through bonding ultraviolet glue.
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| CN202010477645.XA CN111474641A (en) | 2020-05-29 | 2020-05-29 | Fan-out joint assembly of multi-core optical fiber |
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| CN202010477645.XA CN111474641A (en) | 2020-05-29 | 2020-05-29 | Fan-out joint assembly of multi-core optical fiber |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113341502A (en) * | 2021-06-30 | 2021-09-03 | 长飞光纤光缆股份有限公司 | Multi-core fiber coupler based on three-dimensional waveguide and preparation method |
| CN113359252A (en) * | 2021-06-30 | 2021-09-07 | 长飞光纤光缆股份有限公司 | Multi-channel optical module with single fan-in fan-out based on MPO interface |
| CN113433629A (en) * | 2021-06-30 | 2021-09-24 | 长飞光纤光缆股份有限公司 | Multi-channel optical module with double fan-in fan-out based on MPO interface |
| CN114690312A (en) * | 2022-03-31 | 2022-07-01 | 武汉邮电科学研究院有限公司 | Multi-dimensional multiplexing multi-core optical fiber fan-in fan-out chip |
| US11880071B2 (en) | 2021-08-23 | 2024-01-23 | Corning Research & Development Corporation | Optical assembly for interfacing waveguide arrays, and associated methods |
| US11914193B2 (en) | 2021-06-22 | 2024-02-27 | Corning Research & Development Corporation | Optical assembly for coupling with two-dimensionally arrayed waveguides and associated methods |
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2020
- 2020-05-29 CN CN202010477645.XA patent/CN111474641A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11914193B2 (en) | 2021-06-22 | 2024-02-27 | Corning Research & Development Corporation | Optical assembly for coupling with two-dimensionally arrayed waveguides and associated methods |
| CN113341502A (en) * | 2021-06-30 | 2021-09-03 | 长飞光纤光缆股份有限公司 | Multi-core fiber coupler based on three-dimensional waveguide and preparation method |
| CN113359252A (en) * | 2021-06-30 | 2021-09-07 | 长飞光纤光缆股份有限公司 | Multi-channel optical module with single fan-in fan-out based on MPO interface |
| CN113433629A (en) * | 2021-06-30 | 2021-09-24 | 长飞光纤光缆股份有限公司 | Multi-channel optical module with double fan-in fan-out based on MPO interface |
| CN113359252B (en) * | 2021-06-30 | 2022-03-18 | 长飞光纤光缆股份有限公司 | Multi-channel optical module with single fan-in fan-out based on MPO interface |
| US11880071B2 (en) | 2021-08-23 | 2024-01-23 | Corning Research & Development Corporation | Optical assembly for interfacing waveguide arrays, and associated methods |
| CN114690312A (en) * | 2022-03-31 | 2022-07-01 | 武汉邮电科学研究院有限公司 | Multi-dimensional multiplexing multi-core optical fiber fan-in fan-out chip |
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