Dutt Avik, Miller Steven, Luke Kevin, Cardenas Jaime, Gaeta Alexander L, Nussenzveig Paulo, Lipson Michal
Opt Lett. 2016 Jan 15;41(2):223-6. doi: 10.1364/OL.41.000223.
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.
我们展示了通过使用电控集成微加热器外部控制耦合条件，对双环光学参量振荡器中产生的压缩水平进行连续调谐。我们通过利用一对耦合的氮化硅微环谐振器所表现出的避免交叉来实现这一点。我们直接检测到压缩水平从欠耦合状态下的0.5 dB变化到过耦合状态下的2 dB，这对应于片上产生的压缩因子从0.9 dB变化到3.9 dB。这种压缩水平的宽可调性可用于需要最佳压缩程度的片上量子增强传感协议。
