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Tunable negative tap microwave photonic filter using an SOA in a Sagnac loop
Author(s) -
Ning Guoxiang,
Shum Ping,
Aditya S.
Publication year - 2008
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.23044
Subject(s) - band pass filter , microwave , interferometry , band stop filter , optics , photonics , physics , sagnac effect , optical filter , optical amplifier , polarization (electrochemistry) , optoelectronics , coherence (philosophical gambling strategy) , filter (signal processing) , engineering , electrical engineering , low pass filter , laser , chemistry , quantum mechanics
A novel tunable coherence‐free microwave photonic filter configuration is presented. This all‐optical structure realizes negative taps and works as a bandpass notch filter. The configuration is based on a Sagnac loop interferometer containing a single‐drive intensity modulator and a polarization‐maintaining semiconductor optical amplifier that generates phase difference between the clockwise and counterclockwise propagating waves inside the Sagnac loop. Measured results demonstrate a robust tunable bandpass notch response. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 225–226, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23044