Generation of monocycle squeezed light in chirped quasi-phase-matched nonlinear crystals
arXiv:1703.08157 · doi:10.1103/PhysRevA.95.033837
Abstract
We present a quantum theory of parametric down-conversion of light in chirped quasi-phase-matched second-order nonlinear crystals with undepleted quasi-monochromatic pump. This theory allows us to consider generation of ultrabroadband squeezed states of light and is valid for arbitrary, sufficiently slowly-varying nonlinear poling profiles. Using a first-order approximate quantum solution for the down-converted light field, we calculate the squeezing spectra and the characteristic squeezing angles. We compare the approximate solutions with the exact and numerical ones and find a very good agreement. This comparison validates our approximate solution in the regime of moderate gain, where the existing approaches are not applicable. Our results demonstrate that aperiodically poled crystals are very good candidates for generating ultrabroadband squeezed light with the squeezing bandwidth covering almost all the optical spectrum and the correlation time approaching a single optical cycle.
15 pages, 10 figures
References in corpus (3)
Cited by in corpus (7)
- Fourier-transform infrared spectroscopy with undetected photons from high-gain spontaneous parametric down-conversion
- Broadband spectroscopy and interferometry with undetected photons at strong parametric amplification
- Nonlinear Domain Engineering for Quantum Technologies
- Generator of spatial evolution of the electromagnetic field
- Interferometric sorting of temporal Hermite-Gauss modes via temporal Gouy phase
- Time-resolved second-order autocorrelation function of parametric downconversion
- Low-coherence interferometry with undetected mid-infrared photons in the high-gain regime