Abstract
We formulate theoretically and demonstrate experimentally an all-optical method for reconstruction of the amplitude, phase, and coherence of frequency combs from a single-shot measurement of the spectral intensity. Our approach exploits synthetic frequency lattices with pump-induced spectral short- and long-range couplings between different signal components across a broad bandwidth of hundreds of GHz in a single nonlinear fiber. When combined with ultra-fast signal conversion techniques, this approach has the potential to provide real-time measurement of pulse-to-pulse variations in the spectral phase and coherence properties of exotic light sources.
Highlights
The concept of synthetic frequency lattice in photonics,1,2 where dynamic modulation induces cross-talks between discrete spectral lines to produce lattice-like behavior,3,4 is stimulating rapidly growing research in recent years
We propose and experimentally demonstrate that specially designed synthetic lattices can facilitate a new method for recovering the full spectral amplitude, phase, and coherence information on an optical frequency comb from a single-shot measurement of the spectral intensities after an input signal is transformed in a nonlinear fiber
We have experimentally investigated the use of synthetic lattices for single-shot reconstruction of frequency combs
Summary
The concept of synthetic frequency lattice in photonics, where dynamic modulation induces cross-talks between discrete spectral lines to produce lattice-like behavior, is stimulating rapidly growing research in recent years. We propose and experimentally demonstrate that specially designed synthetic lattices can facilitate a new method for recovering the full spectral amplitude, phase, and coherence information on an optical frequency comb from a single-shot measurement of the spectral intensities after an input signal is transformed in a nonlinear fiber. This is mediated by a co-propagating pump, which is tailored to realize an effective synthetic lattice for the signal through the energy-conserving process of four-wave mixing Bragg scattering (FWM-BS)..
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