Interferometric Autocorrelation Measurements of Supercontinuum based on Two-Photon Absorption
Abstract
We report on interferometric autocorrelation measurements of broadband supercontinuum light in the anomalous dispersion regime using two-photon absorption in a GaP photodetector. The method is simple, low-cost, and provides a direct measure of the second-order coherence properties, including quantitative information on the coherence time and average duration of the supercontinuum pulses as well as on the presence of temporally coherent sub-structures. We report measurements in regimes where the supercontinuum is coherent and incoherent. In the former case, the interferometric measurements are similar to what is observed for mode-locked laser pulses while in the latter case the interferometric measurements and coherence properties are shown to have characteristics similar to that of a stationary chaotic light source.
Keywords
Cite
@article{arxiv.1901.02688,
title = {Interferometric Autocorrelation Measurements of Supercontinuum based on Two-Photon Absorption},
author = {Shanti Toenger and Roosa Mäkitalo and Jani Ahvenjärvi and Piotr Ryczkowski and Mikko Närhi and John M. Dudley and Goëry Genty},
journal= {arXiv preprint arXiv:1901.02688},
year = {2019}
}