杨帆同学的工作——Impact of optical-electrical conversion responsivity in sub-sampled photonic analog-to-digital converter的相关研究成果近期已发表在Chinese Optics Letters杂志上，该工作得到了国家自然科学基金的部分资助 (grant no. 61822508, 61571292 and 61535006)。
摘要：This letter investigates the impact of the photodiode (PD) saturation in a sub-sampled photonic analog-to-digital converter (PADC) with two individual pulse lasers. It is essentially proved that when the optical power to the saturated PD increases, the optical-electrical conversion (OEC) responsivity and digitized output power of PADC become decreased. If femtosecond pulses are employed for the PADC sampling clock, the time-stretching process in a dispersive medium is necessary to decrease the impact of the PD saturation. In contrast, when the sampling clock with picosecond pulses is utilized, the PD saturation is more tolerable and thus the OEC responsivity can be improved by increase of the optical power to the PD no matter if the time-stretching process is employed.