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Phase-Modulation-Based Microwave Photonic Bandpass Filter Using a Programmable-Induced Frequency Response

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4 Author(s)
Huang, T.X.H. ; Sch. of Electr. & Inf. Eng., Univ. of Sydney, Sydney, NSW, Australia ; Xiaoke Yi ; Tong Chen ; Minasian, R.A.

A new optical phase modulator microwave photonic filter that can realize a flat-top radio frequency (RF) bandpass filter with multiple taps and bipolar coefficients is presented. It is based on a spatial light modulator that induces a programmable phase-modulation to intensity-modulation frequency response in combination with an RF phase-modulated multiwavelength signal. It enables the realization of negative taps, and opens up regions for operating the bandpass filter to extremely high frequencies. Experimental results demonstrate a multiple tap flat-top microwave filter at 18.5 GHz. To our best knowledge, this is the first phase modulator-based microwave photonic structure that exhibits multiple taps together with an arbitrary flat-top response.

Published in:

Photonics Technology Letters, IEEE  (Volume:24 ,  Issue: 14 )