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2005年04月25日

【期刊论文】Optical XOR and NXOR logic operations with erasable self-pumped phase conjugation

余有龙， Youlong Yu， Zuohong Jiang， Jie Ying and Xiaoyi Dong

，-0001，（）：

-1年11月30日

The phenomenon of erasable self-pumped phase conjugation (SPPC) is explained theoretically. Encoded by intensity, all-optical XOR and NXOR logic functions are performed experimentally by controlling the incident and the erasure beams of SPPC. The time response curves of both operations are shown.

self-pumped phase conjugation， optical logic operation

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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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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】基于干涉解调技术的光纤光栅传感系统*

余有龙，谭华耀，锺永康

光学学报，2001，21（8）：987～989，-0001，（）：

-1年11月30日

摘要

介绍一种基于干涉解调技术的光纤光栅传感系统，用非平衡波长扫描迈克耳孙干涉仪将来自传感光栅的包含应变信息的波长信号变为相位信号。借助相位计显示的相位变化确定待测应变的大小。该传感系统具备分辨5.5的能力，其灵敏度的实验值为1.80°，与预期值1.83°基本吻合。

光纤光栅，传感器，分辨率，干涉解调

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2005年04月25日

【期刊论文】A technique fo hancing the thermal stabilit-technique tor enlaanclng te11ermal D111ry OIP hydrogenloaded fiber Bragg grating

余有龙， Youlong Yu， and Hwayaw Tam

CHINESE OPTICS LETTERSlV01. 1, No.5 May 20, 2003，-0001，（）：

-1年11月30日

摘要

Heat treatment with the presence of hydrogen (H2) that react with GeE' centers (Ge) at high tern perature will weaken the refractive index modulation of grating fabricated in hydrogen loaded normal germanosilicate fiber. Pre. annealing treatment of the above fiber was demonstrated to be able to enhance the grating's thermal stability effectively．0.37-nm blue-shift of the reflected Bragg wavelength was ob-served．

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