摘要
介绍了用于测量小位移的波长扫描－光纤法布里－珀罗干涉仪系统。用扫描波长作为“中介”，比较参考腔长和传感腔长，可以“准绝对”地测量传感腔的长度。这个测量与波长扫描的准确度无关，仅依赖于参考腔的长度。而通过将传感腔改变一个已知距离，就可以简单地“自标定”参考腔的长度。
?An optical scanning, fiber dual extrinsic Fabry-Perot interferometer (DEFPI) system for measuring small distance is presented. Taking the scanning wavelength as an “inter-converter” to compare the gap length of the sensing head with a reference length, we may obtain, in practice, a semi-absolute measurement of the sensing head length. The measurement is independent from the wavelength scanning accuracy and the reference cavity length can be self-calibrated simply by changing the sensing length with a known distance.
出处
《计量学报》
CSCD
北大核心
1998年第1期9-14,共6页
Acta Metrologica Sinica
关键词
光纤干涉仪
测距
光纤传感器
Fiber interferometer
Distance measurement
Fiber sensor.
