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Preparation method of fiber Bragg grating array for interference type vibration sensing

A fiber grating array, vibration sensing technology, applied in the directions of cladding fiber, optical waveguide light guide, light guide, etc., can solve the problems of poor wavelength anti-vibration stability, low signal-to-noise ratio, low grating reverse energy coupling, etc., to achieve flatness The effect of good degree and strong reflectivity

Active Publication Date: 2016-11-23
WUHAN UNIV OF TECH
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Problems solved by technology

[0005] The technical problem to be solved by the present invention lies in the narrow 3dB bandwidth of the existing conventional Bragg grating, the poor stability of the wavelength in detection against vibration, and the low signal-to-noise ratio; Based on the combination of chirped grating technology and grating on-line preparation technology, the preparation of fiber grating array for interferometric vibration sensing with certain reflection bandwidth, good flatness and strong reflectivity is provided.

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  • Preparation method of fiber Bragg grating array for interference type vibration sensing
  • Preparation method of fiber Bragg grating array for interference type vibration sensing

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[0015] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0016] The preparation method of the fiber Bragg grating array for interference type vibration sensing in the embodiment of the present invention combines the chirped fiber grating technology with the grating online preparation technology. In the online preparation process of the chirped fiber grating, a 193nm single pulse with high photon energy The excimer laser is used as a light source to write on the online dynamic drawing fiber to obtain a fiber grating array for interferometric vibration sensing.

[0017] According to the bandwidth and wavelength requirements of the prepared fiber grating, r...

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Abstract

The invention discloses a preparation method of a fiber Bragg grating array for interference type vibration sensing. In an online preparation process of a chirped fiber Bragg grating, 193nm single-pulse excimer laser with high photon energy is used as a light source and an optical fiber which is dynamically wiredrawn online is written, to obtain the fiber Bragg grating array for the interference type vibration sensing. The fiber Bragg grating array, which has certain reflection bandwidth, good flatness and also has relatively strong reflectivity, can be obtained, and can be used for the interference type vibration sensing.

Description

technical field [0001] The invention relates to the field of optical fiber grating preparation, in particular to a method for preparing an optical fiber grating array for interference type vibration sensing. Background technique [0002] Optical fiber sensor network presents a rapid development trend in the field of sensor applications due to its unique advantages of multiple detection points on a single fiber and long-distance transmission as a signal carrier. A large-capacity grating-based interference-type vibration sensor network has many characteristics of high sensitivity, large-scale and long-distance detection on a single fiber, and is widely used in military, marine resource exploration, seabed geological monitoring and the perimeter of important places It has broad application prospects in security. [0003] The working mechanism of the vibration sensor based on the grating-to-interference structure is that a beam of coherent light is reflected on two adjacent gra...

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Application Information

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IPC IPC(8): G02B6/02
CPCG02B6/02142
Inventor 郭会勇王立新余海湖李小甫唐健冠
Owner WUHAN UNIV OF TECH
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