All-optical photonic microwave phase shifter based on an optical filter with a nonlinear phase response

X Wang, E.H.W. Chan, R.A. Minasian

Research output: Contribution to journalArticle

Abstract

A new photonic microwave phase shifting structure that can realize a continuous 0° to 360° phase shift with only little frequency dependent amplitude and phase variation over a wide frequency range is presented. It is based on controlling the amplitude and phase of the optical carrier and two antiphase RF modulation sidebands of two phase modulated optical signals by adjusting the wavelength of the optical carriers that fall on the rising and falling edges of an optical bandpass filter with a nonlinear phase response. The new photonic microwave phase shifter has a simple structure. It only requires one normal electro-optic phase modulator and one low-cost commercially available optical filter. It does not involve any electrical component, and has the advantages of small size, lightweight, and robust performance. Experimental results are presented which demonstrate the realization of a continuous 0 rc to 360 rc phase shift, with close to flat phase and amplitude response performance over a wideband microwave range. © 1983-2012 IEEE.
Original languageEnglish
Pages (from-to)3323-3330
Number of pages8
JournalJournal of Lightwave Technology
Volume31
Issue number20
DOIs
Publication statusPublished - 2013
Externally publishedYes

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