Broadband Multi-frequency Electric Field Measurement Using Dual Optical Frequency Combs

A kind of novel method for measuring broadband multi-frequency electric field based on dual optical frequency combs is presented in this paper. An electric field measurement system consisting of femtosecond lasers, electro-optic probes, balanced photodetector and high-speed digital acquisition card is established, and a multi-frequency recovery algorithm is designed. The experimental results show that in the range of 10 GHz, the sensitivity of the system is 10 mV/m, and the error of frequency recovery is less than 1 MHz.