基于线型腔掺铒光纤激光器的光纤光栅传感实验研究

张治国; 王旭; 于志辉; 张民; 叶培大

光学技术, 2006, 32 (6): 0935, 网络出版: 2010-06-03

基于线型腔掺铒光纤激光器的光纤光栅传感实验研究

The experimental study of a fiber Bragg grating sensor system based on linear-cavity Er-doped fiber laser

论文大纲

张治国 ^1,*王旭 ²于志辉 ²张民 ¹叶培大 ¹

作者单位

¹ 北京邮电大学光通信与光波技术教育部重点实验室，北京 100876

² 北京邮电大学电子工程学院，北京 100876

掺铒光纤激光器光纤光栅光栅传感一维调节器步进电机 Er-doped fiber laser fiber Bragg grating(FBG) FBG sensor one-dimensional adjustor step motor

摘要

提出了一种基于线型腔掺铒光纤激光器的光纤布拉格光栅传感解调系统，并进行了理论分析和实验验证。此传感系统具有稳定性好、信噪比高、结构简单等特点。实验结果表明：在常温下光纤光栅传感解调系统能很好的实现光纤光栅传感信号的传感和检测；15m掺铒光纤用作增益介质可以产生较大信噪比的稳定激光输出，系统在4nm范围内的解调精度为0．04nm。

Abstract

A scheme of fiber Bragg grating wavelength demodulation based on Er-doped fiber laser is proposed and demonstrated. The cavity of the fiber laser consists of the sensor FBG and the tunable FBG,the Bragg period is tunable through a onedimensional adjustor. The one-dimensional adjustor,which is connected with a step motor that is controlled by a PLC (Programmable logic controller),can control the laser to emit or not through tuning the period of the tunable FBG. The tuning module,the O/E circuit and the detecting-and-controlling system construct a close loop,which controls the performance of the wavelength demodulation. The experiment result shows that the precision of the proposed system is about 0.04nm in a range of 4nm.

参考文献

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张治国, 王旭, 于志辉, 张民, 叶培大. 基于线型腔掺铒光纤激光器的光纤光栅传感实验研究[J]. 光学技术, 2006, 32(6): 0935. ZHANG Zhi-guo, WANG Xu, YU Zhi-hui, ZHANG Min, YE Pei-da. The experimental study of a fiber Bragg grating sensor system based on linear-cavity Er-doped fiber laser[J]. Optical Technique, 2006, 32(6): 0935.

基于线型腔掺铒光纤激光器的光纤光栅传感实验研究

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