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Optics Letters

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  • Editor: Alan E. Willner
  • Vol. 35, Iss. 8 — Apr. 15, 2010
  • pp: 1242–1244

Ultrahigh-Q microwave photonic filter with Vernier effect and wavelength conversion in a cascaded pair of active loops

Enming Xu, Xinliang Zhang, Lina Zhou, Yu Zhang, Yuan Yu, Xiang Li, and Dexiu Huang  »View Author Affiliations


Optics Letters, Vol. 35, Issue 8, pp. 1242-1244 (2010)
http://dx.doi.org/10.1364/OL.35.001242


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Abstract

A new cascaded microwave photonic filter that can realize a high Q value is presented. It consists of two infinite impulse response filters based on two active loops. Owing to wavelength conversion employing cross-gain modulation of the amplified spontaneous emission spectrum of the semiconductor optical amplifier in one loop, the interference between the modulated optical signals of different taps from two loops can be avoided, and stable transmission characteristics of the filter can then be achieved. Using this cascaded structure, the free spectral range and Q value can be increased significantly, and tunability can also be realized. Measured results of a high Q of 3338 and a rejection ratio of about 40 dB are achieved.

© 2010 Optical Society of America

OCIS Codes
(060.2340) Fiber optics and optical communications : Fiber optics components
(350.4010) Other areas of optics : Microwaves

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: December 21, 2009
Revised Manuscript: March 8, 2010
Manuscript Accepted: March 8, 2010
Published: April 15, 2010

Citation
Enming Xu, Xinliang Zhang, Lina Zhou, Yu Zhang, Yuan Yu, Xiang Li, and Dexiu Huang, "Ultrahigh-Q microwave photonic filter with Vernier effect and wavelength conversion in a cascaded pair of active loops," Opt. Lett. 35, 1242-1244 (2010)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-35-8-1242


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