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Conference on Lasers and Electro-Optics

Time-Domain Analysis on the Impacts of Chirp and Walk-Off in Picosecond Pulsed Squeezing

Yoshitaka Taguchi, Yasuyuki Ozeki

Published Jan 1, 2020• 0 citations
Publisher

Abstract

We investigate the relation between the squeezing level, chirp parameter of pulses, and the effect of group velocity difference in nonlinear crystals through time-domain analysis, which realizes straightforward evaluation of picosecond pulsed squeezing.
DOI
10.1364/cleo_at.2020.jth2a.26

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We experimentally investigate the temporal characteristics of picosecond squeezed pulses generated via an optical parametric amplification in a periodically poled MgO:LiNbO3 waveguide. The noise variances for the various time delays between the squeezed pulse and a local oscillator are measured using a balanced homodyne detector. The measured delay dependence is asymmetric, and this asymmetry indicates that the phase chirping of the squeezed pulse is different from that of the local oscillator pulse. We show that the observed squeezing can be improved by using the pulse shaping of the local oscillator.