A fiber micro-vibration sensor based on single-mode fiber ring laser

作者：Zhen Shenglai^*; Liu Renzhu; Yu Benli; Zhang Jing; Han Baogang

来源：Chinese Optics Letters, 2009, 7(1): 26-28.

DOI：10.3788/COL20090701.0026

A new micro-vibration sensor based on single-mode fiber ring laser is put forward. The Mach-Zehnder interferometric (MZI) detection technique is presented for interrogating laser frequency shift due to the measurand (piezoelectric transducer (PZT) is used to simulate the micro-vibration) induced laser cavity strain from both single- and multi-mode lasers. In the experiment, compared with multi-mode laser sensors, the single-mode laser sensor is proved to be a sensor with high resolution. When the PZT is driven by the analog signal (0.03 rad near 2 kHz), the signal-to-noise ratio (SNR) of output signal from the single-mode laser sensor is close to 55 dB and the sensitivity of the sensor is about 5 x 10(-5) rad/Hz(1/2).

• 出版日期2009-1-10
• 单位安徽大学