Chow Jong H, McClelland David E, Gray Malcolm B, Littler Ian C M
Centre for Gravitational Physics, Faculty of Science, The Australian National University, Canberra, ACT 0200, Australia.
Opt Lett. 2005 Aug 1;30(15):1923-5. doi: 10.1364/ol.30.001923.
We demonstrate a fiber Fabry-Perot (FFP) sensor that is capable of detecting subpicostrain signals, from 100 Hz and extending beyond 100 kHz, using the Pound-Drever-Hall (PDH) frequency locking technique. A low-power diode laser at 1550 nm is locked to a free-space reference cavity to suppress its free-running frequency noise, thereby stabilizing the laser. The stabilized laser is then used to interrogate a FFP sensor whose PDH error signal yields the instantaneous fiber strain.
我们展示了一种光纤法布里-珀罗（FFP）传感器，该传感器能够使用庞德-德雷弗-霍尔（PDH）频率锁定技术检测从100 Hz到超过100 kHz的亚皮应变信号。一个1550 nm的低功率二极管激光器被锁定到一个自由空间参考腔，以抑制其自由运行频率噪声，从而稳定激光器。然后，稳定后的激光器用于询问一个FFP传感器，该传感器的PDH误差信号可得出瞬时光纤应变。
