Tunable squeezing using coupled ring resonators on a silicon nitride chip

Optics Letters
Avik DuttMichal Lipson

Abstract

We demonstrate continuous tuning of the squeezing-level generated in a double-ring optical parametric oscillator by externally controlling the coupling condition using electrically controlled integrated microheaters. We accomplish this by utilizing the avoided crossing exhibited by a pair of coupled silicon nitride microring resonators. We directly detect a change in the squeezing level from 0.5 dB in the undercoupled regime to 2 dB in the overcoupled regime, which corresponds to a change in the generated on-chip squeezing factor from 0.9 to 3.9 dB. Such wide tunability in the squeezing level can be harnessed for on-chip quantum-enhanced sensing protocols that require an optimal degree of squeezing.

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Citations

Mar 8, 2018·Science Advances·Avik DuttMichal Lipson
Nov 2, 2019·Optics Express·Caterina TaballioneKlaus-J Boller
Jul 25, 2020·Light, Science & Applications·Avik DuttShanhui Fan
Dec 28, 2019·Optics Express·J ArnbakT Gehring
Sep 1, 2018·Light, Science & Applications·Lucia CaspaniDavid J Moss
Apr 16, 2021·Nature Communications·Y ZhangZ Vernon
Jul 21, 2021·Light, Science & Applications·Avik DuttShanhui Fan

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