Delay Compensated FBG Demodulation System Based on Fourier Domain Mode-Locked Lasers

被引：22
|
作者：
Mei, Jiawei [1 ]
Xiao, Xiaosheng [1 ]
Yang, Changxi [1 ]
机构：
[1] Tsinghua Univ, Dept Precis Instrument, State Key Lab Precis Measurement Technol & Instru, Beijing 100084, Peoples R China
来源：
IEEE PHOTONICS TECHNOLOGY LETTERS | 2015年 / 27卷 / 15期
基金：
中国国家自然科学基金;
关键词：
Optical fiber sensing; FBG demodulation; Fourier domain mode-locked laser; OPTICAL COHERENCE TOMOGRAPHY; WAVELENGTH-SWEPT LASER; FIBER LASER; INTERROGATION; FDML;
D O I：
10.1109/LPT.2015.2432055
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Fourier domain mode-locked lasers are excellent wavelength-swept sources for high-speed fiber Bragg grating (FBG) demodulation. When the lasers are applied for remote FBG sensing, the transmission delay could make the sensing signal deviating significantly from its real position due to the short sweep period of the lasers, which can cause large wavelength demodulation error. An autocalibration method for compensating the delay is proposed by inserting a Fabry-Perot etalon with a wavelength marker into the reference optical path. Besides, the wavelength sweeping nonlinearity can be real-time monitored via the multiple combs of the Fabry-Perot etalon and absolute wavelength of FBG can be derived using interpolation algorithm. Experimental results show that this demodulation method is efficient and accurate.
引用
收藏
页码：1585 / 1588
页数：4
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