Minimally perturbing photonic broadband EM field sensor s ystem with evironmental compensation

摘要

We review the development and recent performance results of a stand-alone fiber optic based EM field sensor system. The sensor pheads are miniature (lcm), electrically passive, and are directly couple to optical firbers at the remote sensing site. Sensor conversion of EM fields to optical intensity is carried out by mounting small antenna structures directly onto high speed lithium niboate electro-optic modulator chips. Optical power to the sensor head is derived from a stabilizaed laser which is located within a system chasis at a control room location. Sensor and fiber temperature drift effects are compensated by specized remote bias control electronics.