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Journal of Lightwave Technology

Journal of Lightwave Technology

| A JOINT IEEE/OSA PUBLICATION

  • Vol. 26, Iss. 15 — Aug. 1, 2008
  • pp: 2578–2583

Novel Multitap, Flat-Top Microwave Photonic Filter Based on Sinusoidal Group Delay Gratings

Xiaoke Yi and Robert A. Minasian

Journal of Lightwave Technology, Vol. 26, Issue 15, pp. 2578-2583 (2008)


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Abstract

A new microwave photonic filter structure that realizes both a multitap, flat-top radio-frequency bandpass filter and bipolar taps, while also exhibiting low-noise operation, is presented. It is based on using a phase-modulated laser signal propagating through a novel sinusoidal group delay grating, which induces tailored phase shifts to the carrier and sidebands. The filter integrates tap weighting and delays simultaneously in one unit, which enables multiple-tap low-noise signal processing together with negative coefficients. Experimental results demonstrate the realization of a flat-top bandpass filter response with 7.8-GHz free spectral range and more than 45-dB rejection ratio. Extensions to this concept by connecting additional sinusoidal group delay gratings in cascade, to provide enhanced signal processing functions, are also described.

© 2008 IEEE

Citation
Xiaoke Yi and Robert A. Minasian, "Novel Multitap, Flat-Top Microwave Photonic Filter Based on Sinusoidal Group Delay Gratings," J. Lightwave Technol. 26, 2578-2583 (2008)
http://www.opticsinfobase.org/jlt/abstract.cfm?URI=jlt-26-15-2578

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