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A Polarization-Maintaining Dispersion Compensation Microstructure Optical Fiber

A microstructure optical fiber, color cast technology, applied in the field of optical fiber communication, can solve the problem of unmentioned inner and outer core mode coupling, and achieve the effect of good polarization-maintaining characteristics and high birefringence value

Active Publication Date: 2022-05-17
郑州天河通信科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this design also builds a coaxial dual-core structure, it only studies how to achieve large negative dispersion by adjusting and optimizing the structural parameters of photonic crystal fibers, and does not mention the coupling of inner and outer core modes.

Method used

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  • A Polarization-Maintaining Dispersion Compensation Microstructure Optical Fiber
  • A Polarization-Maintaining Dispersion Compensation Microstructure Optical Fiber
  • A Polarization-Maintaining Dispersion Compensation Microstructure Optical Fiber

Examples

Experimental program
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Effect test

Embodiment 1

[0069] In this embodiment, the distance Λ between adjacent air holes is 2.288 μm; the diameter d1 of the air holes is 1.601 μm; the diameter d2 of the air holes is 1.372 μm; the diameter d3 of the air holes is 0.224 μm; the diameter d4 of the air holes is 1.055 μm; The number of rows of air holes in the inner cladding air hole array directly above the single-layer air hole array is 2 rows, and the number of air hole rows in the inner cladding air hole array directly below is 2 rows; the air holes contained in the 2 sub-regions of the area 2 air hole array The number of rows is 7 rows and the number of columns is 6 columns.

[0070] Referring to Figure 2(a), the value of the inner core neff-y is greater than the value of the inner core neff-x, and the inner core has a birefringence with the x direction as the fast axis and the y direction as the slow axis; the value of the outer core neff-x is greater than The value of neff-y for the outer core, which has birefringence with the...

Embodiment 2

[0074] In this embodiment, the distance Λ between adjacent air holes is 2.293 μm; the diameter d1 of the air hole is 1.606 μm; the diameter d2 of the air hole is 1.377 μm; the diameter d3 of the air hole is 0.229 μm; the diameter d4 of the air hole is 1.060 μm; The number of rows of air holes in the inner cladding air hole array directly above the single-layer air hole array is 4 rows, and the number of air hole rows in the inner cladding air hole array directly below is 4 rows; the air contained in the two sub-regions of the area 2 air hole array The number of hole rows is 11 rows and the number of columns is 7 columns.

[0075] Referring to accompanying drawing 6 (a), the numerical value of inner core neff-y is greater than the numerical value of inner core neff-x, and inner core has x direction as fast axis, and y direction is the birefringence of slow axis; The numerical value of outer core neff-x is greater than The value of neff-y for the outer core, which has birefringe...

Embodiment 3

[0079] In this embodiment, the distance Λ between adjacent air holes is 2.298 μm; the diameter d1 of the air holes is 1.611 μm; the diameter d2 of the air holes is 1.382 μm; the diameter d3 of the air holes is 0.234 μm; the diameter d4 of the air holes is 1.065 μm; The number of air hole rows in the inner cladding air hole array directly above the single-layer air hole array is 6 rows, and the number of air hole rows in the inner cladding air hole array directly below is 6 rows; the air holes contained in the two sub-regions of the area 2 air hole array The number of rows is 15 rows and the number of columns is 8 columns.

[0080] Referring to accompanying drawing 10 (a), the numerical value of inner core neff-y is greater than the numerical value of inner core neff-x, and inner core has x direction as fast axis, and y direction is the birefringence of slow axis; The numerical value of outer core neff-x is greater than The value of neff-y for the outer core, which has birefrin...

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Abstract

A polarization-maintaining dispersion-compensating microstructure optical fiber, using pure silica glass as the base material; including an inner core, an air hole array in area 1 and an air hole array in area 2; the air holes in the air hole arrays in area 1 and area 2 all adopt a square lattice Arrangement; the array of air holes in area 2 and the array of air holes in area 1 are arranged in a half-layer dislocation in the y direction; in area 1, the middle row of 2 consecutive air holes is ignored to form a solid area as the inner core; the two outer cores are respectively located in the area of ​​area 2 In the two sub-regions, each outer core contains two air holes; the long and short axes of the inner and outer cores are vertical, and the center points of the inner core and the two outer cores are located on the x-axis. The present invention is a microstructure optical fiber with a large negative dispersion in a certain polarization direction of the inner core, and can maintain the polarization direction of this mode during transmission, so as to realize polarization maintenance and cumulative dispersion compensation for the light input by the front-end polarization-maintaining fiber technical effect.

Description

technical field [0001] The invention relates to the field of optical fiber communication, in particular to a polarization-maintaining dispersion compensation microstructure optical fiber. Background technique [0002] Optical fiber is one of the excellent optical signal transmission media. Polarization-maintaining dispersion-compensated optical fiber can not only reduce the bit error rate, but also improve the quality of signal transmission, and has broad application prospects. [0003] The flexibility of microstructure fiber structure design provides a large design space for realizing polarization maintaining characteristics and dispersion compensation characteristics. When using microstructured fibers to achieve polarization-maintaining characteristics (or high birefringence characteristics), if the overall structure of the microstructured fibers has C2v symmetry, the x and y polarization states of the same mode in the core will no longer be degenerate (x, y The real par...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/02G02B6/024G02B6/036
CPCG02B6/02042G02B6/02261G02B6/02285G02B6/02319G02B6/02342G02B6/024G02B6/036Y02P40/57G02B6/02357G02B6/02366
Inventor 王伟杨慢赵畅康晓晨杨宏达李文超
Owner 郑州天河通信科技有限公司
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