Chinese Journal of Lasers, Volume. 35, Issue 5, 726(2008)
Two Noise Reduction Methods in Interferential Optical Fiber Sensor
A fiber sensor based on all polarization-maintaining fiber Mach-Zehnder interferometer is presented, in which the single-frequency polarization-maintaining optical fiber laser is used as a light source. An active feedback loop for laser source and a balanced-mixer receiver are adopted to suppress the noise of the sensor system. This system makes the intensity noise reduce about 15 dB, and the signal-to-noise ratio of the system is up to 60 dB.
Get Citation
Copy Citation Text
Ge Qiang, Xu Changchun, Wu Xuqiang, Qian Kai, Li Zhijun, Yu Benli. Two Noise Reduction Methods in Interferential Optical Fiber Sensor[J]. Chinese Journal of Lasers, 2008, 35(5): 726