Reflective amplified recirculating delay line bandpass filter

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

Research output: Contribution to journalArticlepeer-review


A new microwave photonic filter structure that can achieve a high Q factor, high stopband rejection, and high skirt selectivity bandpass filter response simultaneously is presented. It is based on reflecting the signal back into a single amplified optical recirculating delay line and comprises coherent summation of the multiple signals that constitute each tap and incoherent summation of the successive taps. This introduces a new class of filter operation and effectively enables the realization of a higher order bandpass filter characteristic in a very simple structure. Experimental results are presented that demonstrate a multiple-tap high-Q bandpass filter response that also displays high stopband rejection level and high skirt selectivity.
Original languageEnglish
Pages (from-to)1441-1446
Number of pages6
JournalJournal of Lightwave Technology
Issue number6
Publication statusPublished - Jun 2007
Externally publishedYes


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