所属单位：电子信息工程学院

发表刊物：OPTICS COMMUNICATIONS

关键字：Digital-to-analog conversion Microwave photonics Waveform generation Phase modulation Optical pulse generation

摘要：Arbitrary waveform generation by a serial photonic digital-to-analog converter (PDAC) is demonstrated in this paper. To construct the PDAC, an intensity weighted, time and wavelength interleaved optical pulse train is first generated by phase modulation and fiber dispersion. Then, on-off keying modulation of the optical pulses is implemented according to the input serial digital bits. After proper dispersion compensation, a combined optical pulse is obtained with its total power proportional to the weighted sum of the input digital bits, and digital-to-analog conversion is achieved after optical-to-electronic conversion. By properly designing the input bits and using a low pass filter for signal smoothing, arbitrary waveforms can be generated. Performance of the PDAC is experimentally investigated by establishing a 2.5 GSa/s 4-bit PDAC. The established PDAC is found to have a good linear transfer function and the effective number of bits (ENOB) reaches as high as 3.49. Based on the constructed PDAC, generation of multiple waveforms including triangular, parabolic, square and sawtooth pulses are implemented with the generated waveforms very close to the ideal waveforms. (C) 2016 Elsevier B.V. All rights reserved.

ISSN号：0030-4018

是否译文：否

发表时间：2017-01-15

合写作者：Gao, Bindong,潘时龙

第一作者：张方正

通讯作者：张方正