Photonics Research, 2014, 2 (5): 05000097, Published Online: Nov. 5, 2014
Spurious-free dynamic range improvement in a photonic time-stretched analog-to-digital converter based on third-order predistortion Download: 887次
Fiber optics links and subsystems Nonlinear optical signal processing Data processing by optical means
Abstract
Spurious-free dynamic range (SFDR) limited by intermodulation distortions is a usually accepted measure for dynamic performance of a photonic time-stretched analog-to-digital converter (ADC). In this paper, SFDR improvement in a photonic time-stretched ADC based on third-order predistortion is proposed. The third-order predistortion is achieved optically within an integrated dual-parallel Mach–Zehnder modulator (DPMZM). The mechanism of SFDR improvement with third-order predistortion in the DPMZM is theoretically analyzed. Compared with a conventional scheme without predistortion, the experimental results show that the SFDR improvement of ~26 dB in the proposed scheme is proved.
Boyu Xu, Wulue Lv, Jiamu Ye, Jinhai Zhou, Xiaofeng Jin, Xianmin Zhang, Hao Chi, Shilie Zheng. Spurious-free dynamic range improvement in a photonic time-stretched analog-to-digital converter based on third-order predistortion[J]. Photonics Research, 2014, 2(5): 05000097.