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Proceedings Paper

A novel optical coding method for all-optical A/D conversion using nonlinear optical switches based on the Sagnac interferometer
Author(s): Lixun Zhang; Yongzhi Liu; Yong Liu
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Paper Abstract

Self- and cross-phase modulation (SPM, XPM) in fiber is expected to play a major role in ultrafast all-optical analog-to-digital conversion(ADC), which can overcome the obstacles of inherently limited operating speed of electronic ADC. In this paper, we propose novel optical coding method for all-optical ADC using nonlinear optical switches based on the Sagnac interferometer. The multiperiod transfer function, which is the key to coding, is achieved through an exact design of the Sagnac interferometer. We conducted proof-of-principle experiments and successfully demonstrated 2.6-bit all optical ADC with Gray code output. The proposed optical coding, combined with existing optical sampling and quantizing techniques, will enable ultrafast photonic ADC without electronics.

Paper Details

Date Published: 4 January 2008
PDF: 6 pages
Proc. SPIE 6839, Nonlinear Optics: Technologies and Applications, 683913 (4 January 2008); doi: 10.1117/12.754958
Show Author Affiliations
Lixun Zhang, Univ. of Electronic Science and Technology of China (China)
Yongzhi Liu, Univ. of Electronic Science and Technology of China (China)
Yong Liu, Univ. of Electronic Science and Technology of China (China)


Published in SPIE Proceedings Vol. 6839:
Nonlinear Optics: Technologies and Applications
Yiping Cui; Qihuang Gong; Yuen-Ron Shen, Editor(s)

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