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We present 10-GHz ultra-broadband flat-topped optical frequency comb (> 3.64-THz within 3.5-dB power variation) based on seeding a highly nonlinear fiber with transform-limited Gaussian-shaped pulse from directly generated Gaussian-shaped comb.
We present a programmable multi-tap microwave photonic phase filter operating over an ultra-wide bandwidth. Complex programmability of >30 taps is achieved by optical line-by-line pulse shaping on a 10 GHz Gaussian optical frequency comb using a novel interferometric scheme. Through high-speed real-time measurements, we show programmable chirp control in the range ±0.6GHz ns.
Microwave photonic filters utilizing optical frequency combs have been shown to achieve narrow bandwidths, high stopband attenuation as well as easy tunability of center frequency and bandwidth. The ability to achieve smooth apodization of optical frequency comb spectrum to specific spectral profiles is important to obtain high stopband attenuations. Previously, by utilizing an optical pulse shaper...
We demonstrate multitap microwave photonic filter with complex coefficient taps as a programmable spectral phase filter based on single-sideband modulation of an optical frequency comb, and line-by-line optical pulse shaping in an interferometeric scheme.
We use intensity and phase modulators to develop a 10-GHz optical frequency comb whose shape can be easily switched between extremely flat-topped (38-lines within 1-dB) and Gaussian (36-lines over 15-dB dynamic range).
We demonstrate tunable programmable microwave photonic filters based on optical frequency combs. The utilization of optical comb enables to scale multi tap filters to large number of taps. By using optical line-by-line pulse shaping to program tap weights, we shape the filter's bandpass. In contrast to our previous work, we demonstrate a much simplified technique based on intensity modulator biased...
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