Chinese Optics Letters, 2014, 12 (s1): S10606, Published Online: Jul. 31, 2014
A dither-free bias voltage and driver signal amplitude control technique for optical 8PSK generator Download: 960次
Abstract
We propose a dither-free 8-phase-shift-keying (8PSK) generator control scheme for adjusting the bias voltage of Mach–Zehnder modulator (MZM) and the electrical driver signals of two cascaded phase modulators (PMs). The control module includes a delay-line interferometer (DLI), a balanced photo-detector (BPD), and asynchronous sampling data processing. Both analysis and simulation results show that the bias voltage and the driver signal amplitude control can be achieved independently between these cascaded modulators with only one tap point and one control configuration. Finally, the influence of the bit number of A/D converter (ADC) for asynchronous sampling is also discussed for the practical implementation.
Yupeng Zhu, Yanfu Yang, Bingyang Yan, Jiechang Zhong, Yong Yao. A dither-free bias voltage and driver signal amplitude control technique for optical 8PSK generator[J]. Chinese Optics Letters, 2014, 12(s1): S10606.