Fiber Optical Sensor

Fiber Optical Electric-Field Readout System

Photonic Electric Field Sensing System (PEFS) is an instrument that optically measures the electric field. It integrates a fiber optic E-field sensor probe, a laser, a photo-receiver, an amplifier module, and associated electronics. The probe connects to the system via two fibers. The sensor system covers a broad frequency range from 10 MHz to 40 GHz. The E-field intensity is proportional to the readout signal. The amplifier gains are adjustable to optimize the sensitivity and the dynamic ranges. The E-field frequency information can be obtained by connecting to a spectrum analyzer or a frequency-tunable filter. A multichannel system is available with the configurations of either switching among the sensor heads or simultaneously reading all heads at once using independent laser and detector sets.