Study on the multiplexed sensor system based on tunable fiber laser with fiber Bragg grating

DONG Bo; HE Shi-ya; HU Shu-yang; ZHOU Jin-feng; TIAN Da-wei; ZHAO Qi-da

In order to overcome the limited bandwidth and the weak power of the laser and enlarge the range of the multi-point detection effectively,a tunable fiber laser is designed and used as the source of optical sensor system with WDM and TDM technique.Based on the mode couple theory,using a stepper motor to tune the wavelength of FBG to scan the fiber laser demodulation is analyzed theoretically and studied experimentally.Strain resolution of about 2.9με/step is obtained.The system has high signal-to-noise ratio and can multiplex a large number of FBGs,which is economical and practical in sensor array system.

1. Applied Science College, Beijing University of Technology, Beijing 100022, China;

2. Institute of Modern Optics, Nankai University, Tianjin 300071, China

Received Date: 2004-09-29

Accepted Date: 2004-10-22

Available Online: 2005-11-25

Abstract: In order to overcome the limited bandwidth and the weak power of the laser and enlarge the range of the multi-point detection effectively,a tunable fiber laser is designed and used as the source of optical sensor system with WDM and TDM technique.Based on the mode couple theory,using a stepper motor to tune the wavelength of FBG to scan the fiber laser demodulation is analyzed theoretically and studied experimentally.Strain resolution of about 2.9με/step is obtained.The system has high signal-to-noise ratio and can multiplex a large number of FBGs,which is economical and practical in sensor array system.

HTML

Reference (10)

[1]	万里冰,张博明,王殿富.一种封装的光纤Bragg光栅应变传感器[J].激光技术,2002,26(5):385～387.
[2]	BERKOFF T A,KERSEY A D.Fiber Bragg grating array sensor system using a bandpass wavelength division multiplexer and interferometric detection[J].IEEE Photon Technol Lett,1996,8(11):1522～1524.
[3]	鲍吉龙,章献民,陈抗生.光纤光栅传感器及应用[J].激光技术,2000,24(3):174～179.
[4]	KERSEY A D,BERKOFF T A,MORSEY W W.Multiplexed fiberBragg grating strain-sensor system with a fiber Fabry-Perot wavelength filter[J].Opt Lett,1993,18(16):1370～1372.
[5]	JACKSON D A,RIBEIRO A B L,REEKIE L et al.Simple multiplexing scheme for a fiber-optic grating sensor network[J].Opt Lett,1993,18(14):1192～1194.
[6]	RIBEIRO A B L,FERREIRA L A,SANTOS J L.Analysis of the reflective-matched fiber Bragg grating sensing interrogation scheme[J].Appl Opt,1997,36(4):934～939.
[7]	RAO Y J,LOBORIBEIRO A B,JACKSON D A et al.Simultaneous spatial,time and wavelength division multiplexed in-fiber grating sensing network[J].Opt Commun,1996,125:53～58.
[8]	HE Sh Y,HU Sh Y,ZHAO Q D.Time/wavelength fiber Bragg grating multiplexing sensor array[J].光学学报,2003,23(增刊):847～848.
[9]	KERSEY A D,MOREY W W.Multiplexed Bragg grating fiber laser strain sensor system with mode-locked interrogation[J].Electron Lett,1993,29(1):112～114.
[10]	余有龙,谭华耀,王骐.基于光纤激光器的波分复用光纤光栅传感系统[J].光学学报,2002,22(5):592～594.

Study on the multiplexed sensor system based on tunable fiber laser with fiber Bragg grating

Abstract

References

Proportional views

通讯作者: 陈斌, bchen63@163.com

Proportional views