Bulletin of the American Physical Society
APS March Meeting 2023
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session W65: Quantum Information in AMO Physics II
3:00 PM–5:48 PM,
Thursday, March 9, 2023
Room: Room 414
Sponsoring
Unit:
DAMOP
Chair: Wenlu Shi, University of California, Irvine
Abstract: W65.00001 : Improvement of Squeezing using a Spatial Phase Modulator and Machine Learning*
3:00 PM–3:12 PM
Presenter:
jorge amari
(Gakushuin University)
Authors:
jorge amari
(Gakushuin University)
Junnosuke Takai
(Gakushuin University)
Takuya Hirano
(Gakushuin University)
To achieve high squeezing levels, it is necessary to improve the temporal and spatial mode matching between the squeezed light and the local oscillator (LO) used in homodyne measurements. As for the temporal mode, temporal shaping of the LO pulse enables almost unity efficiency and squeezing of -5.0 dB was reported using waveguides with a pulsed light source [1]. On the other hand, improvement of spatial mode matching has remained as a challenge for the case of pulsed single-path amplification in which the bandwidth of squeezing is wide.
In the present paper, we report on the achievement of squeezing level of -5.88 dB by controlling the spatial phase distribution of the LO beam using a spatial light modulator (SLM) and machine learning. This is the highest value for a pulsed light source, updating the value recorded in 1994 [2].
*This work was supported by Grant-in-Aid for Scientific Research(C) (Grant No. 19K03703).
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