Influence of the sampling clock pulse shape mismatch on channel-interleaved photonic analog-to-digital conversion

作者：Guang Yang, Weiwen Zou*, Lei Yu, And Jianping Chen
摘要：We investigate the pulse shape mismatch of the sampling clock in channel-interleaved photonic analog-to-digital converters (PADCs) and its influence on the frequency response of the PADC system. Two schemes to generate sampling clock pulses are experimentally implemented to study the influence of the pulse shape mismatch. The scheme with the well-managed pulse shape in all channels is successful in eliminating the influence. Subsequently, a flat 35GHz frequency response of a four-channel 4002GSa/s PADC is demonstrated, and the effective number of bits reaches 7.7bits at 11GHz and 7bits at 31GHz.
出版源：Optics Letters, vol. 43, no. 15., pp. 3530-3533, Aug. 2018