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Inner wall fused and embedded single-mode polarization maintaining fiber grating and preparation method thereof

A polarization-maintaining optical fiber and single-mode technology, which is applied in the direction of polarization optical fiber, cladding optical fiber, optical waveguide light guide, etc., can solve the problems of inconvenient research and complicated preparation process of side-hole optical fiber, and achieve the effect of good polarization maintaining characteristics

Inactive Publication Date: 2012-08-22
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the polarization-maintaining fiber made of fiber geometry asymmetry, such as side-hole polarization-maintaining fiber grating, is quite mature in terms of analysis theory and manufacturing process, but the preparation process of side-hole fiber is relatively complicated, which brings a lot of inconvenience to our research. Polarization-maintaining fiber grating with simpler structure to solve

Method used

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  • Inner wall fused and embedded single-mode polarization maintaining fiber grating and preparation method thereof
  • Inner wall fused and embedded single-mode polarization maintaining fiber grating and preparation method thereof
  • Inner wall fused and embedded single-mode polarization maintaining fiber grating and preparation method thereof

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Embodiment approach 1

[0030] combine image 3 A schematic diagram of a device for making an inner-wall fusion-embedded single-mode polarization-maintaining fiber grating according to the present invention.

[0031] The air hole of the present invention is circular and coaxial with the cladding (Fig. 2(a)) The embodiment of the manufacturing method of the single-mode polarization-maintaining fiber grating fused to the inner wall, specifically includes the following steps:

[0032] ①. A polarization-maintaining optical fiber 5 whose air hole is circular and coaxial with the cladding carries hydrogen for one cycle, strips off the coating layer of the optical fiber with a length of 3-4 cm, and fixes it on the optical fiber holder after cleaning. Observe the position of the major and minor axes of the fiber core with a microscope;

[0033] ②. In order to reduce the birefringence introduced by ultraviolet exposure, adjust the multi-dimensional adjustment device so that the long axis of the optical fiber...

Embodiment approach 2

[0039] The embodiment of the manufacturing method of the D-type air hole inner wall fusion-embedded single-mode polarization-maintaining fiber grating specifically includes the following steps:

[0040] ①. A single-mode polarization-maintaining optical fiber fused to the inner wall of a D-shaped air hole (Fig. 2(b)) carries hydrogen for one cycle, and strips off the coating layer of the optical fiber with a length of 3-4cm. For better polarization maintenance, the The polarization-maintaining fiber is ground into a D-shaped fiber 9 along the direction of the D-shaped air hole (see Figure 4 );

[0041] ②. After cleaning, fix it on the optical fiber fixture, and use a microscope to observe the position of the long and short axes of the fiber core;

[0042] ③. Adjust the multi-dimensional adjustment device so that the polished surface of the D-type optical fiber is parallel to the phase mask 8, adjust the phase mask 8 to be close to the optical fiber 9, and fix it after adjustm...

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Abstract

The invention provides an inner wall fused and embedded single-mode polarization maintaining fiber grating. The fiber contains an eccentric fiber core (1), an air hole (3) is in the center of the fiber, one part of the eccentric fiber core is embedded into a cladding (2) with lower refractive index, the other part of the eccentric fiber core is suspended in the air hole (3), and the eccentric fiber core is engraved with a grating (4). The fiber prepared by a preparation method for the inner wall fused and embedded single-mode polarization maintaining fiber grating has a simple structure and easy preparation, and a grating write-in method is simple and has large tunable property. Because of good polarization maintaining property, the manufactured inner wall fused and embedded single-mode polarization maintaining fiber grating has large bi-modal interval and good thermal stability, provides a new structural device for avoiding temperature-stress coupling, and provides a new path for active and passive devices related with polarization.

Description

technical field [0001] The invention relates to an optical fiber grating, and also relates to a preparation method of the optical fiber grating, in particular to an inner-wall fusion-embedded single-mode polarization-maintaining optical fiber grating and a preparation method thereof. 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 polarization characteristics and 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 stra...

Claims

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Application Information

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Patent Type & Authority Patents(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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