Ultra-wideband frequency chirp signal generation by using high-speed optical frequency control with optical single-sideband modulation technique

Abstract

By using rapid optical frequency sweep technique, we demonstrated ultra-wideband frequency chirp millimeter-wave signal generation whose bandwidth was 6.4 GHz. Ultra fast and precise optical frequency sweep was achieved by using single-sideband modulation, where the theoretical limit of resolution due to the uncertainty between time and frequency was almost obtained, ultra-wideband frequency chirp signals from 9.6 GHz to 16 GHz, which were generated by using a computer controlled arbitrary waveform generator and a wideband frequency multiplier, were fed to an optical single-single sideband modulator consisting of two sub Mach-Zehnder interferometers