title: 40GS/s Optical analog-to-digital conversion system and its improvement.
abstract: An optical analog-to-digital conversion system is proposed and demonstrated. Using time- and wavelength- interleaved optical sampling pulse train; sampling rate of 40GS/s is realized. 2.5 GHz sinusoidal electrical analog signal is sampled and quantized using this system, achieving an effective number of bits of 3.45 bits. A novel technology that can dramatically improve the bandwidth of this system will also be presented in this paper, which manifests that our system can realized high bandwidth of more than 50 GHz using commercially available LiNbO(3) phase modulator.
authors.affiliation: State Key Laboratory on Intergrated Optoelectronics, Department of Electronic Engineering, Tsinghua University, Beijing 100084, China. wqw04@mails.tsinghua.edu.cn
authors.forename: Qingwei
authors.initials: Q
authors.lastname: Wu
authors.forename: Hongming
authors.initials: H
authors.lastname: Zhang
authors.forename: Yue
authors.initials: Y
authors.lastname: Peng
authors.forename: Xin
authors.initials: X
authors.lastname: Fu
authors.forename: Minyu
authors.initials: M
authors.lastname: Yao
mesh_terms: D000703:Analog-Digital Conversion; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008872:Microwaves; D055096:Optical Devices; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation*