Adaptive correction of amplitude noise for time-interleaved photonic analog-to-digital converter

This paper presents an adaptive noise cancellation method for time-interleaved photonic analog-to-digital converters (TIPADC), where a part of the optical sampling clock signal is divided to back-end processing module to eliminate the amplitude noises in the optical sampling clock induced by laser sources and the pulse repetition rate multiplication like OTDM. The principle of the proposed method is derived theoretically. The effects of the splitting ratio of couplers in OTDM and the modulation depth on the correction efficiency of the method are analyzed by simulation. The results show that the signal-to-noise and distortion (SINAD) of system can be improved more than 30dB by using the proposed scheme.