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2005年04月25日

【期刊论文】A Novel Demodulation Scheme for Fiber Bragg Grating Sensor System

余有龙， Youlong Yu and Hongxia Zhao

IEEE PHOTONICS TECHNOLOGY LETTERS, VOL. 17, NO.1, JANUARY 2005，-0001，（）：

-1年11月30日

摘要

Abstract-A novel fiber Bragg grating (FBG) wavelength demodulation scheme based on a compound interference configuration is introduced. This scheme measures the strain-induced wavelength-shift of the FBG in terms of phase-shift signal. The sensing resolution and sensitivity were demonstrated to be 6.2 n and 1.59, respectively, which match the theoretical value of 1.61 very well.

Index Terms-Compound interference， fiber Bragg grating (， FBG)，， fiber optics sensor， interferometric demodulation.，

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2005年04月25日

【期刊论文】Chirp-Free Tuning of Fiber Bragg Grating Using a Cantilever Beam

余有龙， Youlong YU， Hwayaw TAM， Shuwei GENGl， Muhtesem Suleyman DEMOKAN， Zhiguo LIU and Wenghong CHUNG

Jpn. J. Appl. Phys. Vol. 38 (1999) Pt. 2, No.9A/B，-0001，（）：

-1年11月30日

摘要

A new approach for tuning the wavelength of a fiber Bragg grating without chirping is demonstrated. Tuning is achieved by bending a triangular cantilever beam with the grating was epoxied on its surface. The isosceles triangle was firmly fixed at its base and bending was realised by exerting a force to its vertex. Chirp-free tuning of a fiber Bragg grating over a wavelength range of 4.52nm is demonstrated. Using a correction index of 0.7, the experimental results are in good agreement with thetheoretical values.

fiber， Bragg grating， linearly tuning， chirp-free， cantilever beam， spectral width

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暨南大学，广东

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