Santos J L, Jackson D A
Appl Opt. 1991 Dec 1;30(34):5068-76. doi: 10.1364/AO.30.005068.
A reflective array of optical-fiber sensors multiplexed in time and with their status read using coherence sensing associated with directly modulated multimode laser-diode illumination is investigated. Sensor sensitivity as determined by primary noise sources is evaluated and numerical results are presented. The concept is demonstrated with two all-fiber Michelson interferometers and applied to the measurement of periodic and quasi-static parameters. It is shown that the effect of feedback light into the laser cavity on the level of the system noise floor is negligible, making unnecessary the use of source optical isolation.
研究了一种时分复用的光纤传感器反射阵列，其状态通过与直接调制多模激光二极管照明相关的相干传感来读取。评估了由主要噪声源确定的传感器灵敏度，并给出了数值结果。用两个全光纤迈克尔逊干涉仪演示了该概念，并将其应用于周期性和准静态参数的测量。结果表明，反馈光进入激光腔对系统本底噪声水平的影响可以忽略不计，因此无需使用光源光隔离。
