Deming Kong, Yan Li, Xia Wu, Hui Wang, Hongxiang Guo, Xiaobin Hong, Yong Zuo, Kun Xu, Wei Li, Jian Wu, Jintong Lin. Novel high-sensitivity coherent transceiver for optical DPSK/DQPSK signals based on heterodyne detection and electrical delay interferometer[J]. Chinese Optics Letters, 2012, 10(3): 030603