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All-Optical Continuously Tunable Flat-Passband Microwave Photonic Notch Filter

Wang, Xudong, Yang, Jianxun, Chan, Erwin H. W., Feng, Xinhuan and Guan, Bai-Ou (2015). All-Optical Continuously Tunable Flat-Passband Microwave Photonic Notch Filter. IEEE Photonics Journal,7(1).

Document type: Journal Article
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IRMA ID 75039815xPUB823
Title All-Optical Continuously Tunable Flat-Passband Microwave Photonic Notch Filter
Author Wang, Xudong
Yang, Jianxun
Chan, Erwin H. W.
Feng, Xinhuan
Guan, Bai-Ou
Journal Name IEEE Photonics Journal
Publication Date 2015
Volume Number 7
Issue Number 1
eISSN 1943-0655
Scopus ID 2-s2.0-84923234053
Total Pages 12
Place of Publication United States of America
Publisher Institute of Electrical and Electronics Engineers
HERDC Category C1 - Journal Article (DIISR)
Abstract A new all-optical microwave photonic notch filter (MPNF) is presented. It is based on controlling the amplitude and phase of the optical carriers and RF phase modulation sidebands via a diffraction-based Fourier-domain optical processor. It has the ability of realizing a flat-passband, narrow-notch, and large-free-spectral-range amplitude response and a group delay response with very few ripples. The carrier and sideband optical phase controls enable a continuous notch frequency tuning operation to be realized without altering the response shape. The filter has a simple structure and a wide bandwidth as it only involves optical components. Experimental results demonstrate an MPNF that exhibits a flat passband with <; 1 dB ripples, a deep notch of > 35 dB, and low group delay ripples of <; ±25 ps, together with the continuous notch frequency tunability and excellent long-term stability and repeatability.
Keywords Optical signal processing
Microwave filter
Microwave photonics
Notch filter
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