Coherence-free equivalent negative tap microwave photonic notch filter based on delayed self-wavelength conversion

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

Research output: Contribution to journalArticle


A new coherence-free single-wavelength microwave photonic notch filter, which is widely tuneable, and which is compatible to be inserted in a conventional fiber-optic link, is presented. It is based on self-wavelength cross gain modulation in a semiconductor optical amplifier placed at an off-centre location in a Sagnac loop. The structure can realize a high free spectral-range negative tap notch filter response, and does not have any coherent interference and phase-noise limitations. Moreover, it enables widely tunable notch filtering to be simply realized. Experimental results are presented which demonstrate a large continuous filter tuning range of an octave, robust operation with a narrow linewidth source, and wide passband notch filtering operations.
Original languageEnglish
Pages (from-to)3199-3205
Number of pages7
JournalIEEE Transactions on Microwave Theory and Techniques
Issue number11 PART 2
Publication statusPublished - 21 Oct 2010
Externally publishedYes


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