Chow Jong H, Littler Ian C, McClelland David E, Gray Malcolm B
Opt Express. 2006 May 29;14(11):4617-24. doi: 10.1364/oe.14.004617.
When a fiber Fabry-Perot is used in an ultra-sensitive strain detection system via a radio-frequency interrogation scheme, its frequency discrimination properties can be enhanced by reducing the linewidth of its resonance. This increases the signal-to-noise ratio, and thus suppresses the strain equivalent noise floor. We demonstrate this improvement in a long-distance high performance remote sensing system and show that in reflection, it can mitigate the effects of random phase noise introduced by Rayleigh back-scattering. In transmission, it improves the remote system sensitivity to sub-picostrain resolution, which surpasses any other long-distance remote sensing system to date. With the reduced fiber Fabry-Perot linewidth, all noise sources in the delivery fiber become irrelevant, as the transmission system is limited only by the pre-stabilized laser frequency noise.
当通过射频询问方案将光纤法布里-珀罗干涉仪用于超灵敏应变检测系统时，可通过减小其共振线宽来增强其频率分辨特性。这会提高信噪比，从而抑制应变等效本底噪声。我们在长距离高性能遥感系统中展示了这种改进，并表明在反射模式下，它可以减轻瑞利背向散射引入的随机相位噪声的影响。在透射模式下，它将远程系统的灵敏度提高到亚皮应变分辨率，这超过了迄今为止的任何其他长距离遥感系统。随着光纤法布里-珀罗干涉仪线宽的减小，传输光纤中的所有噪声源都变得无关紧要，因为传输系统仅受预稳定激光频率噪声的限制。
