A standard distributed feedback semiconductor laser that is self-stabilized through the frequency capture effect of an external fiber ring resonator is able to replace the standard reference oscillator of a coherent reflectometer in the system of a distributed fiber vibration sensor. A direct comparison of the signal-to-noise ratio, as measured in configurations with a semiconductor and reference master oscillator, has been carried out for quantitative assessment of the ability of the system to restore the frequency spectrum of vibrations. Distributed measurements of vibration spectra with frequencies up to 5600 Hz and a spatial resolution of 10 m when performed on an optical fiber at a distance of ~3500 m show a signal-to-noise ratio above ~8 dB for both configurations. The difference between the configurations was less than 2 dB over the entire spectral range.

中文翻译：

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使用具有频率捕获功能的半导体激光器作为相干反射仪的工作光发生器进行分布式振动频率测量

通过外部光纤环形谐振器的频率捕获效应而自我稳定的标准分布式反馈半导体激光器能够代替分布式光纤振动传感器系统中相干反射仪的标准参考振荡器。已对在使用半导体和参考主振荡器的配置中测得的信噪比进行了直接比较，以定量评估系统恢复振动频谱的能力。当在约3500 m的距离上对光纤进行振动时，频率高达5600 Hz且空间分辨率为10 m的振动频谱的分布式测量显示，两种配置的信噪比均高于〜8 dB。