✦ LIBER ✦

Continuously tunable microwave photonic notch filter based on the differential group delay

✍ Scribed by Yongxing Jin; Xinyong Dong; Junqiang Zhou; Perry Ping Shum

Publisher: John Wiley and Sons
Year: 2010
Tongue: English
Weight: 464 KB
Volume: 53
Category: Article
ISSN: 0895-2477
DOI: 10.1002/mop.25679

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✦ Synopsis

Abstract

A continuously tunable microwave photonic notch filter is proposed and experimentally demonstrated. This filter is based on the differential group delay generated by a high‐birefringence linearly chirped fiber Bragg grating. The tunability is realized by applying gradient tension to the grating. Free spectral range tuning by 9.27 GHz with more than 35 dB notch rejection is achieved. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:121–123, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25679

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## Abstract A tunable coherent photonic microwave notch filter based on phase‐shifted fiber Bragg grating is proposed. Because of the Yb^3+^/Al^3+^ codoped optical fiber between two sub‐FBGs, the optical phase of the delayed signal is linearly and precisely controlled by adjusting the injected pump