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Proceedings Paper

Dispersion induced RF power degradation in optical true time delay implemented by broadband light source and a dispersion element
Author(s): Peng Fang; Xiaoping Zheng; Yabin Ye; Yili Guo; Hanyi Zhang
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Paper 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.

Paper Details

Date Published: 11 November 2008
PDF: 8 pages
Proc. SPIE 7136, Optical Transmission, Switching, and Subsystems VI, 713608 (11 November 2008); doi: 10.1117/12.803404
Show Author Affiliations
Peng Fang, Tsinghua Univ. (China)
Xiaoping Zheng, Tsinghua Univ. (China)
Yabin Ye, CREATE-NET (Italy)
Yili Guo, Tsinghua Univ. (China)
Hanyi Zhang, Tsinghua Univ. (China)

Published in SPIE Proceedings Vol. 7136:
Optical Transmission, Switching, and Subsystems VI
Ken-ichi Kitayama; Pierpaolo C. Ghiggino; Kim Roberts; Yikai Su, Editor(s)

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