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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 5×10~(-5)rad/Hz~(1/2).
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. the experiment, compared with multi-mode laser sensors, the single-mode laser sensor is proved to be a sensor with high resolution. driven by the analog signal (0.03 rad near 2 kHz), the signal-to-noise ratio (SNR) of the output signal from the single-mode laser sensor is close to 55 dB and the sensitivity of the sensor is about 5 × 10 ~ (-5) rad / Hz ~ (1/2).