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Integrated frequency comb source based Hilbert transformer for wideband microwave photonic phase analysis

2015; Optica Publishing Group; Volume: 23; Issue: 17 Linguagem: Inglês

10.1364/oe.23.022087

1094-4087

Thach G. Nguyen, Mehrdad Shoeiby, Sai T. Chu, Brent E. Little, Roberto Morandotti, Arnan Mitchell, David Moss,

Optical Network Technologies

We demonstrate a photonic RF Hilbert transformer for broadband microwave in-phase and quadrature-phase generation based on an integrated frequency optical comb, generated using a nonlinear microring resonator based on a CMOS compatible, high-index contrast, doped-silica glass platform.The high quality and large frequency spacing of the comb enables filters with up to 20 taps, allowing us to demonstrate a quadrature filter with more than a 5-octave (3 dB) bandwidth and an almost uniform phase response.