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All‐optical coherence‐free microwave filter based on remodulation scheme utilizing different intensity modulators
Author(s) -
Zhu K.,
Ou H.
Publication year - 2012
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.26687
Subject(s) - optics , microwave , electro optic modulator , coherence (philosophical gambling strategy) , filter (signal processing) , laser linewidth , band stop filter , materials science , physics , phase modulation , optical modulator , phase noise , laser , low pass filter , engineering , electrical engineering , quantum mechanics
A simple all‐optical coherence‐free microwave notch filter is proposed and experimentally demonstrated. The filter is based on remodulation scheme using a narrow‐linewidth laser, an intensity electro‐optic modulator, and a Sagnac fiber loop reflector to eliminate the coherent limitation and phase‐induced intensity noise. Both Mach‐Zehnder modulator and electroabsorption modulator are used in the microwave photonic filtering system, and different frequency responses are observed, respectively, in the experiment. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:993–995, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26687