Open AccessBroadband RF disambiguation in subsampled analog optical links via intentionally-introduced sampling jitter
Author(s) -
Sharon R. Harmon,
Jason Mckinney
Publication year - 2014
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.22.023928
Subject(s) - jitter , sampling (signal processing) , broadband , computer science , wideband , waveform , optics , signal (programming language) , nyquist rate , radio frequency , undersampling , physics , telecommunications , radar , detector , programming language
We introduce a novel technique for broadband RF disambiguation which exploits a known jitter imparted onto the sampling rate of an optical pulse source in a subsampled analog optical link. Coarse disambiguation to bandwidths equal to the sample rate is achieved using pure tones as example waveforms by comparing the amplitude of the jitter-induced sidebands relative to the measured signal within the fundamental Nyquist band (frep/2). This sampling technique allows for ultra-wideband signal recovery with a single measurement. In a first-of-its-kind photonics demonstration we show reliable disambiguation for signals with center frequencies spanning 1 MHz - 40 GHz.