A novel optical coding method for all-optical A/D conversion using nonlinear optical switches based on the Sagnac interferometer

Lixun Zhang; Yongzhi Liu; Yong Liu

doi:10.1117/12.754958

4 January 2008 A novel optical coding method for all-optical A/D conversion using nonlinear optical switches based on the Sagnac interferometer

Lixun Zhang, Yongzhi Liu, Yong Liu

Author Affiliations +

Proceedings Volume 6839, Nonlinear Optics: Technologies and Applications; 683913 (2008) https://doi.org/10.1117/12.754958
Event: Photonics Asia 2007, 2007, Beijing, China

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.

Citation Download Citation

Lixun Zhang, Yongzhi Liu, and Yong Liu "A novel optical coding method for all-optical A/D conversion using nonlinear optical switches based on the Sagnac interferometer", Proc. SPIE 6839, Nonlinear Optics: Technologies and Applications, 683913 (4 January 2008); https://doi.org/10.1117/12.754958

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