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4 January 2018 Continuously tunable microwave photonic filter with multiwavelength optical source
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A continuously tunable microwave photonic filter (MPF) with a multiwavelength optical source is proposed and demonstrated. The proposed MPF is based on a broadband optical source (BOS) and a waveshaper, which serves as a programmable slicing optical filter. By programming the waveshaper, a 50-channel stable and flat optical source is realized experimentally. The amplitude and phase of the optical carriers and phase modulation sidebands are then controlled via a Fourier-domain optical processor (FD-OP); phase modulation is changed to single sideband modulation. This filter could also be switched from bandpass to notch filter by controlling FD-OP. As simulation results, the center frequency of the bandpass filter is tuned continuously from 0 to 37.244 GHz in the entire free spectral range (FSR) and this notch filter based on 50 taps has the ability of realizing a narrow-notch, flat-passband, and large FSR response.
© 2018 Society of Photo-Optical Instrumentation Engineers (SPIE) 0091-3286/2018/$25.00 © 2018 SPIE
Huijuan Li, Zhengrong Tong, Weihua Zhang, and Dong Xu "Continuously tunable microwave photonic filter with multiwavelength optical source," Optical Engineering 57(1), 017104 (4 January 2018).
Received: 17 September 2017; Accepted: 5 December 2017; Published: 4 January 2018

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