Rotation of the noise ellipse for squeezed vacuum light generated via four-wave mixing

Corzo, Neil; Glorieux, Quentin; Marino, Alberto M.; Clark, J. B.; Glasser, Ryan T.; Lett, Paul D.

doi:10.1103/physreva.88.043836

Cited by 37 publications

(28 citation statements)

References 30 publications

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“…The observed noise reduction of 1.7 ± 0.4 dB corresponds to a generated squeezing of 5 dB when corrected for detection losses and the non-ideal quantum efficiency of the detectors. This is less than the 10 dB of squeezing expected from the ratio of Q i and Q L owing to residual excess pump noise of 25 dB relative to the shot noise level, and the possible rotation of the optimally squeezed quadratures by the process of FWM [38,39]. Furthermore, higher intrinsic quality factors of 7 million have been demonstrated in silicon nitride rings [34], resulting in a lower oscillation threshold, which not only helps in reducing excess noise in the pump, but also leads to a higher ratio of Q i to Q L .…”

Section: B Squeezing Measurementsmentioning

confidence: 86%

On-Chip Optical Squeezing

et al. 2015

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We report the observation of observation of all-optical squeezing in an on-chip monolithically integrated CMOS-compatible platform. Our device consists of a low loss silicon nitride microring optical parametric oscillator (OPO) with a gigahertz cavity linewidth. We measure 1.7 dB (5 dB corrected for losses) of sub-shot noise quantum correlations between bright twin beams generated in the microring four-wave-mixing OPO pumped above threshold. This experiment demonstrates a compact, robust, and scalable platform for quantum optics and quantum information experiments on-chip.

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Section: B Squeezing Measurementsmentioning

confidence: 86%

On-Chip Optical Squeezing

et al. 2015

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“…So far, the best squeezing via PSF in hot atomic ensemble is -3 dB [18]. Recently, the vacuum squeezed light at Rb D 1 line is reported via four-wave mixing and a typical result of -4 dB is achieved [20]. All of above we discussed are single-mode squeezing at 795 nm.…”

Section: Introductionmentioning

confidence: 69%

Improvement of vacuum squeezing resonant on the rubidium D1 line at 795 nm

Han

et al. 2016

Opt. Express

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Abstract:We report on efficient generation of second harmonic laser and single-mode vacuum squeezed light of 795 nm with periodically poled KTiOPO 4 (PPKTP) crystals. We achieved 111 mW of ultra-violet (UV) light at 397.5 nm from 191 mW of fundamental light with a PPKTP crystal in a doubling cavity, corresponding to a conversion efficiency of 58.1%. Using the UV light to pump an optical parametric oscillator with a PPKTP crystal, we realized -5.6 dB of a maximum squeezing. We analyzed the pump power dependence of the squeezing level and concluded that the UV light induced losses limit the improvement of the squeezing level. The generated squeezed light has huge potential application in quantum memory and ultra-precise measurement.

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“…We suspect that the dispersive nature of the probe leads to a frequency dependence of the squeezing angle, in a manner similar to that described in Refs. [33][34][35], resulting in a rotation of the squeezing ellipse with frequency. In future work, phase-sensitive measurements of the probe and conjugate modes could help to clarify this phenomenon, as well as characterize all joint-quadrature information in the present bright twin-beam case.…”

Section: Discussion and Outlookmentioning

confidence: 99%

Squeezed-twin-beam generation in strongly absorbing media

Swaim

Glasser

2017

Phys. Rev. A

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We experimentally demonstrate the generation of squeezed, bright twin beams which arise due to competing gain and absorption, in a medium that is overall transparent. To accomplish this, we make use of a non-degenerate four-wave mixing process in warm potassium vapor, such that one of the twin beams experiences strong absorption. At room temperature and above, due to Doppler broadening and smaller frequency detunings compared to other schemes, the ground state hyperfine splittings used in the present double-Λ setup are completely overlapped. We show that despite the resulting significant asymmetric absorption of the twin beams, quantum correlations may still be generated. Our results in this new regime demonstrate that the simplified model of gain, followed by loss, is insufficient to describe the amount of quantum correlation resulting from the process.

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Rotation of the noise ellipse for squeezed vacuum light generated via four-wave mixing

Cited by 37 publications

References 30 publications

On-Chip Optical Squeezing

On-Chip Optical Squeezing

Improvement of vacuum squeezing resonant on the rubidium D1 line at 795 nm

Squeezed-twin-beam generation in strongly absorbing media

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