Hollow photon crystal optical fiber based Fabry-perot interferometer sensor and its production method

The technology of a hollow-core photonic crystal and a manufacturing method is applied in the direction of using an optical device to transmit a sensing member, a cladding fiber, an optical waveguide light guide, etc. Extraction and other problems to achieve the effect of small temperature change coefficient

Active Publication Date: 2007-10-17
CHONGQING UNIV
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Problems solved by technology

EFPI interference sensor is an important type of fiber optic sensor, it has all the advantages of fiber optic sensors, but in the actual application process, there are some problems that affect its further wide application: (1). The measurement of traditional EFPI will be affected by temperature changes This will lead to the cross influence b

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  • Hollow photon crystal optical fiber based Fabry-perot interferometer sensor and its production method
  • Hollow photon crystal optical fiber based Fabry-perot interferometer sensor and its production method
  • Hollow photon crystal optical fiber based Fabry-perot interferometer sensor and its production method

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Embodiment Construction

[0015] Referring to Fig. 2, the new EFPI interference sensor is composed of two ordinary communication single-mode optical fibers 2-2 and a hollow-core PCF optical fiber 2-3, and the two ends of the hollow-core PCF optical fiber 2-3 are respectively connected to two ordinary communication One end of the single-mode optical fiber 2-2 is fusion-spliced. The hollow-core PCF fiber 2-3 forms the F-P interference cavity of the sensor, and the end faces of the ordinary communication single-mode fiber 2-2 fused with the hollow-core PCF fiber 2-3 respectively form two reflection surfaces of the F-P cavity.

[0016] In order to further improve the signal strength of the EFPI sensor, the end face of the common communication single-mode optical fiber 2-2 at the right end is plated with Ti 2 o 3 film or other reflective film. In order to ensure the mechanical strength of the welding point after coating, Ti 2 o 3 The film or other reflective films can only be coated on the core of the o...

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Abstract

The invention discloses a hallow photonic crystal fiber based non-intrinsic fiber FP interference sensor composed two ordinary communication single-mode optical fibers 2-2 and a hallow photonic crystal fiber 2-3, the two ends of which are welded with one end of two ordinary communication single-mode optical fibers 2-2, otherwise, one end of one ordinary communication single-mode optical fiber 2-2 is coated with Ti203 film with diameter of 20um-30 um. The invention also discloses the production method of the sensor. The available technical effects of the invention are: (1) the temperature coefficient of EFPI sensor of the invention is small, and capable of working under temperature of 600 deg; (2) when the cavity length of the FP sensor is extended to several centimeter (the cavity length of traditional FP sensor is several hundred microns to millimeter in order), the stripe contrast is high, thereby establishing the foundation in the application of high capacity, quasi-distributed sensing system.

Description

technical field [0001] The invention belongs to the technical field of optical fiber sensing, and in particular relates to an extrinsic optical fiber method-pertinental (EFPI) interference sensor based on a hollow-core photonic crystal fiber and a manufacturing method thereof. Background technique [0002] Due to the advantages of simple structure, high resolution, high precision, small size, wide measurement range, and no fear of electromagnetic interference, fiber optic sensors have attracted extensive attention from scholars at home and abroad in recent years, and have been widely used in composite materials, military and civilian large-scale Structural condition monitoring of building structures, aerospace vehicles, aircraft, etc. to enable so-called smart structures. EFPI interference sensor is an important type of fiber optic sensor, it has all the advantages of fiber optic sensors, but in the actual application process, there are some problems that affect its further ...

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Application Information

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IPC IPC(8): G01D5/353G02B6/02
Inventor 朱涛饶云江杨晓辰段德稳
Owner CHONGQING UNIV
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