Optical fiber ultrasonic sensors based on wavelength division multiplezing technology
We have designed optical fiber ultrasonic sensors based on Fabry-Perot interferometry, and given the principle structure of the sensor probe. The principle of the phenomena of phase induced signal fade in interferometric sensors has been analyzed and the method of multiplexing has been presented. Effective multiplexing for a number of fiber-optic Fabry–Perot sensors is based on wavelength division multiplexing. For wavelength division multiplexing methods, the sensors are arranged in different wavelength domains formed by a wavelength division multiplexer. The signal of each sensor is exported from a tunable narrowband optical filter that queries every sensor though scanning mode. At the same time, the system implemented the operation of anti-phase induced signal fade detection and multiplexing. The result of experiment in water show that the sensor sensitivity reaches -162dB(0dB=1rad/μPa), the frequency response range is from 5 KHz to 5 MHz. The multiplexing number of sensor elements reaches to 8.
optical fiber sensor Fabry-Perot interferometry ultrasonic wave tunable narrowband optical filters wavelength division multiplezing signal fade
Guo Zhenwu Pan Yong Meng Qingbin Liu Guangwei Ge Fuwei Sun Guiling Li Weixiang
Binhai College, Nankai University, Tianjin, China,300270 College of Information Technical Science, Nankai University, Tianjin, China,300071 Binhai College, Nankai University, Tianjin, China,300270 College of Information Technical Science, N
国际会议
第八届国际测试技术研讨会(8th International Symposium on Test and Measurement)
重庆
英文
3023-3026
2009-08-01（万方平台首次上网日期，不代表论文的发表时间）