Inner wall melt-embedded type multicore single mode polarization-maintaining fiber grating and manufacture method

A polarization-maintaining optical fiber and multi-core optical fiber technology, applied in polarized optical fiber, cladding optical fiber, optical waveguide light guide, etc., can solve the problems of inconsistent fiber core grating pitch, poor tunability, and large difference in grating reflection peak, etc., to achieve Improve the effect of integration and polarization maintaining characteristics

Inactive Publication Date: 2010-11-10
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, most of the multi-core fiber gratings are exposed on one side [W.N. MacPherson, Meas. The grating pitch of the fiber core is inconsistent, and the reflection peak of each grating is also different. The core farther away from the writing beam has a smaller reflection peak, and multiple gratings satisfy a fixed relationship, and the tunability is poor. All these give us The research brings a lot of inconvenience

Method used

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  • Inner wall melt-embedded type multicore single mode polarization-maintaining fiber grating and manufacture method
  • Inner wall melt-embedded type multicore single mode polarization-maintaining fiber grating and manufacture method
  • Inner wall melt-embedded type multicore single mode polarization-maintaining fiber grating and manufacture method

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Embodiment approach 1

[0029] refer to Figure 4 A schematic diagram of a device for manufacturing an inner-wall fusion-embedded multi-core single-mode polarization-maintaining fiber grating according to the present invention.

[0030] The air hole of the present invention is circular and coaxial with the cladding (Fig. 3(a)) The embodiment of the manufacturing method of the inner wall fusion-embedded three-core single-mode polarization-maintaining fiber grating specifically includes the following steps:

[0031] ①. Take an inner wall-embedded three-core single-mode polarization-maintaining optical fiber 5, strip off the coating layer of the optical fiber with a length of 3-4cm, clean it and fix it on a rotatable optical fiber fixture;

[0032] ②. Adjust the fixture so that the long axis of one fiber core of the optical fiber is parallel to the phase mask 10 and aligned with the ultraviolet writing light source 6; adjust the phase mask 10 to be close to the optical fiber, and fix it after adjustment...

Embodiment approach 2

[0039] refer to Figure 5 schematic diagram.

[0040] The air hole of the present invention is circular and coaxial with the cladding, and the embodiment of the method for making the grating of the inner wall fusion-embedded dual-core single-mode polarization-maintaining optical fiber (see Figure 2 (a)) with the same reflection peak specifically includes the following steps :

[0041] ①. Take a dual-core single-mode polarization-maintaining optical fiber 13 with an inner wall fusion, strip off the coating layer of the optical fiber with a length of 3-4cm, fix it on a rotatable optical fiber fixture after cleaning, and observe the position of the fiber core with a microscope ;

[0042] ②. Adjust the rotatable fiber clamp to adjust the two cores of the optical fiber to be parallel to the phase mask 10; or make the two cores of the optical fiber perpendicular to the phase mask 10. Add a focusing lens 11 between the optical fiber 13, so that the focal point 12 of the diffractio...

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Abstract

The invention provides an inner wall melt-embedded type multicore single mode polarization-maintaining fiber grating and a manufacture method. The inner wall melt-embedded type multicore single mode polarization-maintaining fiber grating comprises a multicore fiber, the center of the multicore fiber is an air hole, part of each fiber core of the multicore fiber is embedded in a cladding with the refractive index lower than that of the fiber core while the other part thereof is suspended in the air hole to form an inner wall melt-embedded type multicore single mode polarization-maintaining fiber core in an ellipsoid-like shape, and the fiber core is prepared into the inner wall melt-embedded type multicore single mode polarization-maintaining fiber grating by an ultraviolet light source through a phase position maskplate writing technology. Due to good polarization-maintenance performance of the inner wall melt-embedded type multicore single mode polarization-maintaining fiber designed by the invention, the manufactured multiple polarization-maintaining fiber gratings are integrated into one optical fiber, thus improving integration of optical devices in optical fibers and facilitating simultaneous measurement of multiple physical quantities.

Description

technical field [0001] The invention belongs to the technical fields of optical fiber communication and optical fiber sensing. The invention relates to an optical fiber grating, and also relates to a manufacturing method of the optical fiber grating. Background technique [0002] Polarization Maintaining Optical Fiber (PMF, Polarization Maintaining Optical Fiber) is widely used in advanced coherent optical communications, fiber optic gyroscopes, hydrophones, fiber optic sensors, etc. due to its strong polarization maintaining ability for linearly polarized light. Key components in missiles and aircraft. Compared with the stress-type polarization-maintaining fiber, the polarization-maintaining fiber made of asymmetric fiber geometry has better temperature stability and has a wide range of applications. Fiber Bragg grating sensor is a research hotspot in the field of fiber optic sensing. Using the strain and thermal expansion of fiber Bragg grating to detect various physical...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/024G02B6/02
Inventor 苑立波关春颖田凤军
Owner HARBIN ENG UNIV
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