505-MS/s photonic analog-to-digital converter

Summary form only given. Optical sampling techniques show great promise for realizing high-resolution (12 bit) analog-to-digital converters (ADCs) with multi-gigahertz of instantaneous bandwidth. The advantages of optical sampling derive from the ultra-low timing jitter (<100 fs) of short-pulse mode-locked lasers and the negligible electromagnetic crosstalk between the optical sampling pulses and the electrical signal being sampled. The phase-encoded sampling technique used in the 505-MS/s photonic ADC reported provides high linearity and large suppression (50-dB) of laser amplitude noise.