An FBG Strain Sensor Demodulation Technique using Temperature- compensation HBF Sagnac LM
A novel method of a fiber Bragg grating (FBG) stain sensor demodulation technique is presented. An experimental system is built up in which high birefringence fiber (HBF) Sagnac loop mirror (LM) is used as the edge filter. In order to improve the temperature stability of the system, we have experimentally demonstrated that packaged HBF can compensate the temperature shit of the HBF Sagnac LM filter. The shift of wavelength for an uncompensated HBF Sagnac LM is approximately 2.3nm/℃, and that of the compensated HBF Sagnac LM is 0.03nm/℃, which is much less than that of the uncompensated HBF Sagnac LM filters. Using the temperature-compensation HBF Sagnac LM, We achieve linear demodulation of FBG strain sensor with a range of about 1900με and the strain sensitivity is about 0.14μw/μ ε.
FBG strain sensor Demodulation High birefringence fiber Sagnac loop mirror Temperature - compensation
Yonglin Huang
College of Optoelectronic Engineering, Nanjing University of Posts and Telecommunications,Nanjing 210003, China
国际会议
上海
英文
1803-1806
2011-10-21（万方平台首次上网日期，不代表论文的发表时间）