Heterodyne interrogation system for TDM interferometric fiber optic sensors array

作者：Fang, Gaosheng; Xu, Tuanwei^*; Li, Fang

来源：Optics Communications, 2015, 341: 74-78.

DOI：10.1016/j.optcom.2014.12.018

• Fiber optic sensors
• Heterodyne
• Orthogonal demodulation

We proposed an interrogation system for time sequenced fiber optic sensors array based on the heterodyne detection and orthogonal demodulation techniques, where the sensors array is a kind of interferometric fiber optic sensors. The techniques are theoretically analyzed and experimentally demonstrated with recovering the sinusoid wave and triangle wave applied to the sensors. The system has a phase resolution about 1 x 10(-4) rad/root Hz, the amplitude consistency and linearity of the demodulated results are 95.275% and 98.379%, respectively with single frequency event applied to the sensors.

• 单位
  中国科学院