Single sideband suppressed carrier modulator based frequency shifting recirculating delay line microwave photonic filter

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

Research output: Contribution to journalArticle

Abstract

A high-resolution low-noise single-laser photonic filter that can operate to high frequencies is presented. It is based on the single-sideband suppressed carrier electro-optic modulator frequency shifter that enables high frequency shifts to be realised in a frequency shifting amplified recirculating delay line loop structure. Designs to minimise the unwanted spurious harmonic frequencies generated by the single-sideband suppressed carrier modulator are presented. Simulations are presented to investigate the gain spectrum limitations that arise from the bandwidth narrowing of the erbium-doped fibre amplifier due to the important self-filtering effects that occur when the signals circulate inside the frequency shifting amplified recirculating delay line loop, and new techniques to counter this effect and to realise a large number of taps is presented. Experimental results demonstrate a high-resolution microwave photonic filter with a Q of 107 and with low-noise performance.
Original languageEnglish
Pages (from-to)160-167
Number of pages8
JournalOptics and Laser Technology
Volume45
Issue number1
DOIs
Publication statusPublished - Feb 2013
Externally publishedYes

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