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Low crosstalk connector among core number mismatch optical fibers

A connector and four-core optical fiber technology, applied in the field of optical communication technology and optical sensing, can solve the problems of restricting the commercial application of dual-core optical fiber devices, restricting dual-core optical fibers, and dual-core optical fiber connections.

Inactive Publication Date: 2011-03-30
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The distance between the two cores of a dual-core fiber is usually less than 20 μm. The traditional method cannot connect the dual-core fiber to the two single-core fibers at the same time, and connect the two cores of the dual-core fiber to the cores of the two single-core fibers respectively. Therefore, The connection between core number mismatched fibers (that is, one dual-core fiber and two single-core fibers) has always been an important reason that limits the in-depth research and application of dual-core fibers.
At present, the technical problem of connecting a dual-core optical fiber with a special structure (for example, one core is located in the center of the optical fiber) to a single-core optical fiber has been solved, but one end of many dual-core optical fiber devices needs to be connected to two single-core optical fibers at the same time. These issues have not been resolved, thus limiting the commercial application of these dual-core optical fiber devices

Method used

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  • Low crosstalk connector among core number mismatch optical fibers
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  • Low crosstalk connector among core number mismatch optical fibers

Examples

Experimental program
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Effect test

Embodiment 1

[0037] Example 1, please refer to figure 1 shown.

[0038] A low-crosstalk connector between optical fibers with a mismatched number of cores, the connector comprising: a dual-core optical fiber 1 with a mismatched phase rate, an asymmetric collinear four-core optical fiber 2, a first collinear four-core optical fiber 31, a second common line four-core optical fiber 32, ..., the nth co-linear four-core optical fiber 3n, the first single-core optical fiber 4 and the second single-core optical fiber 5.

[0039]The phase-rate-mismatched dual-core fiber 1 is connected to one end of the asymmetric collinear four-core fiber 2, and the first core 11 of the phase-rate-mismatched dual-core fiber and the second core of the phase-rate-mismatched dual-core fiber 12 are concentrically connected with the first core 21 of the asymmetric collinear four-core optical fiber and the third core 23 of the asymmetric collinear four-core optical fiber respectively.

[0040] The other end of the des...

Embodiment 2

[0060] Example 2, please refer to Figure 5 As shown, a low-crosstalk connector between optical fibers with a mismatched number of cores, the connector includes: a dual-core optical fiber 1 with a mismatched phase rate, an asymmetric collinear four-core optical fiber 2, a first collinear four-core optical fiber 31, The first single-core optical fiber 4 and the second single-core optical fiber 5 .

[0061] The phase-rate-mismatched dual-core fiber 1 is connected to one end of the asymmetric collinear quad-core fiber 2, and the first core 11 of the phase-rate-mismatched dual-core fiber and the second core 12 of the phase-rate-mismatched dual-core fiber are respectively connected to The first core 21 of the asymmetric collinear four-core optical fiber is concentrically connected with the third core 23 of the asymmetric collinear four-core optical fiber.

[0062] The other end of the asymmetric collinear four-core optical fiber 2 is connected with one end of the first collinear f...

Embodiment 3

[0073] Example three, please refer to Figure 6 As shown, the present invention is a low-crosstalk connector between core number mismatched optical fibers, which connector includes all the same components as described in Embodiment 1, and includes a second collinear quad-core optical fiber 32, The third collinear four-core optical fiber 33 and the fourth collinear four-core optical fiber 34 .

[0074] The connection between the phase-rate-mismatched dual-core fiber 1 and the asymmetric collinear quad-core fiber 2 is the same as that described in Embodiment 1.

[0075] The connection between the asymmetric collinear quadruple fiber 2 and the first collinear quadruple fiber 31 is the same as that described in Embodiment 1.

[0076] The other end of the first collinear four-core optical fiber 31 is connected with one end of the second collinear four-core optical fiber 32 and the second core 31b of the first collinear four-core optical fiber and the fourth core of the first colli...

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Abstract

The invention relates to a low crosstalk connector among core number mismatch optical fibers and belongs to the field of optical communication technology and optical sensing. By the connector, any double-core optical fiber can be simultaneously connected with two single-core optical fibers. The connector comprises a phase rate mismatch double-core optical fiber, an asymmetric collinear four-core optical fiber, first to nth collinear four-core optical fibers, a first single-core optical fiber and a second single-core optical fiber, wherein two cores of the phase rate mismatch double-core optical fiber are concentrically connected with two cores of the inner side of one end of the asymmetric collinear four-core optical fiber; and two cores of the outer side of the other end of the asymmetric collinear four-core optical fiber are concentrically connected with two cores of the inner side of one end of the first collinear four-core optical fiber,..., and two cores of the outer side of the other end of the nth collinear four-core optical fiber are concentrically connected with the cores of the first single-core optical fiber and the second single-core optical fiber respectively. The connector has the characteristics of low insertion loss, small cross coupling and reversible light path and is suitable for manufacturing directional couplers, filters and the like based on the double-core optical fiber.

Description

technical field [0001] The invention belongs to the field of optical communication technology and optical sensing, and is suitable for making optical devices such as couplers and filters. Background technique [0002] In recent years, the research on dual-core optical fiber has received widespread attention. It is a new type of special-structured optical fiber containing a pair of parallel cores. By designing dual-core optical fibers with different structural parameters, many Completed optics. [0003] For example, the gain equalization of erbium-doped fiber amplifier multi-channel amplification can be achieved by using a dual-core fiber. It uses the different coupling coefficients of light of different wavelengths between the two cores to balance the amplification effect of pump light on lasers of different wavelengths. . In addition, directional couplers, Mach-Zehnder filters, and wavelength division multiplexers / demultiplexers can also be made using dual-core fibers. I...

Claims

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Application Information

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IPC IPC(8): G02B6/26G02B6/24
Inventor 赵瑞峰裴丽马中秀张晨芳
Owner BEIJING JIAOTONG UNIV