Dispersion induced RF power degradation in optical true time delay implemented by broadband light source and a dispersion element

Peng Fang; Xiaoping Zheng; Yabin Ye; Yili Guo; Hanyi Zhang

doi:10.1117/12.803404

11 November 2008 Dispersion induced RF power degradation in optical true time delay implemented by broadband light source and a dispersion element

Peng Fang, Xiaoping Zheng, Yabin Ye, Yili Guo, Hanyi Zhang

Author Affiliations +

Proceedings Volume 7136, Optical Transmission, Switching, and Subsystems VI; 713608 (2008) https://doi.org/10.1117/12.803404
Event: Asia-Pacific Optical Communications, 2008, Hangzhou, China

Abstract

Dispersion-induced radio-frequency (RF) power degradation in the optical true time delay (OTTD) module implemented by a broadband light source (BBLS) and a dispersion element is studied in this paper, both theoretically and experimentally. Theoretical results indicate that compared with that using a tunable laser source (TLS), OTTD using a BBLS suffers from extra power degradation, and that when the transfer function of the tunable optical filter (TOF) can be approximated to be rectangular, at additional frequencies besides the power-vanishing frequencies in the case of using TLS, the phenomenon of electrical power-vanishing can also be observed. Experiments using a TLS and a BBLS are performed for comparison, and TOFs of different bandwidth are used. The electrical transfer functions are measured and prove the conclusion of the theory. The electrical power-vanishing frequencies are provided and in good agreement with the theoretical values.

Citation Download Citation

Peng Fang, Xiaoping Zheng, Yabin Ye, Yili Guo, and Hanyi Zhang "Dispersion induced RF power degradation in optical true time delay implemented by broadband light source and a dispersion element", Proc. SPIE 7136, Optical Transmission, Switching, and Subsystems VI, 713608 (11 November 2008); https://doi.org/10.1117/12.803404

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