Lateral stress sensing system based on double-mode photon cystal coptical fibre and implementing method

A technology of photonic crystal fiber and transverse stress, which is applied in the direction of transmitting sensing components, cladding optical fibers, optical waveguides and light guides by using optical devices, and can solve the difficulty of sensing and detecting transverse stress of photonic crystal fibers and detecting transverse stress Major and other issues
CN1831486AInactive Publication Date: 2006-09-13BEIJING JIAOTONG UNIV
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
BEIJING JIAOTONG UNIV
Publication Date
2006-09-13
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

A method for realizing horizontal stress sense based on double mode photon crystal optical fiber includes coupling output light of laser into zero double refraction or high double refraction and double mode photon crystal optical fiber by horizontal dislocation mode after said output light passes through polarization controller, setting double mode photon crystal optical fiber in force receiving unit for sensing horizontal stress exerted from outside, utilizing far field light spot to detect space light field formed by double mode interference for obtaining detection result of horizontal stress. The system for realizing said method is also disclosed.
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Description

technical field

[0001] The present invention relates to an accurate and sensitive fiber optic sensing system to measure transverse stress or strain, especially transverse stress based on a dual-mode photonic crystal fiber based on a zero-birefringence dual-mode photonic crystal fiber or a high-birefringence dual-mode photonic crystal fiber (Strain) sensing system and implementation method. Background technique

[0002] The safety and quality monitoring of buildings is mainly to detect the stress and deformation under the action of external force. The general detection method is to install a large number of distributed strain gauges or other strain-sensing fibers in the building materials. Since the composite structure composed of fiber materials and building materials can properly improve the strength of building materials, the use of composite fiber materials for building loads Deformation detection is a relatively common method. Embed optical fibers in building materials...

Claims

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