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We demonstrate a comb-based programmable radio-frequency photonic filter which uses an InP arrayed waveguide grating pulse shaper for comb apodization. RF photonic filtering with high stopband attenuation of >36.4 dB is achieved with Gaussian apodization.
Fundamental science, as well as all communications and navigation systems, are heavily reliant on the phase, timing, and synchronization provided by low‐noise and agile frequency sources. Although research into varied photonic and electronic schemes have strived to improve upon the spectral purity of microwave and millimeter‐wave signals, the reliance on conventional electronic synthesis for tuning...
Over the past few decades optical pulse shaping has become an integral part of numerous photonic systems, impacting applications from optical communications to RF-photonic filtering [1]. In a parallel line, driven primarily by the need for broadband mass transmission of information, the technology behind photonic integration on the InP platform has continued to advance at a remarkable rate [2]. Leveraging...
We present a high power, broadly tunable, optoelectronic frequency comb generator. The device produces between 60-75 lines within 10dB bandwidth over its tuning range, from 6-18 GHz, and can handle 1W of optical input power.
We demonstrate programmable control of a pulse shaper that achieves both fine resolution and broad bandwidth operation by dispersing light into two dimensions. We show line-by-line pulse shaping at 5 GHz in a closed-loop configuration.
We demonstrate switching at the clock rate among four different optoelectronic frequency combs. After processing them with a 2D pulse shaper, this scheme enables temporal multiplexing of arbitrary radio-frequency signals.
We discuss research at Purdue University in which ultrafast optical signal processing approaches are adapted for generation, processing, and compression of ultrabroadband RF electrical signals.
We report on a 4-channel radio-frequency arbitrary waveform generator, capable to switch within a clock period among synthesized radio-frequency arbitrary waveforms. The system works by combining an original switching scheme of time-multiplexed multi-wavelength optical frequency combs with a two-dimensional line-by-line pulse shaper featuring broad bandwidth operation over large temporal windows....
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