Parametric generation of "squeezed" pulses in dispersive nonlinear media

Audrius Berzanskis, K.‐H. Feller, A. Stabinis

Faige F. Singer

А. В. Белинский

A numerical simulation of the formation of optical pulses in a traveling-wave parametric oscillator was used to establish that squeezed quantum states can only be formed efficiently under conditions of zero dispersion of the refractive index at the signal frequency.

Rafael Romero Mendez, Sashank Kaushik Sridhar, Samyak Gothi +4 more

Parametrically driven cavity solitons (PDCS), unlike single-pumped cavity solitons, are localized optical pulses arising from parametric processes. These cavity solitons, recently discovered in pure-Kerr media, offer great promise for nonlinear dynamics studies and metrology. Here, we present the first multimode quantum description of pure-Kerr PDCS. In the below threshold regime, we verify single- and two-mode squeezing, while above threshold we uncover novel "quantum" dispersive waves - the quantum analog of soliton Cherenkov radiation. Besides revealing these unexplored quantum properties, we show that PDCS generates up to 20 dB of squeezing, only limited by overcoupling and intrinsic losses for experimentally routine parameters. We therefore provide a pathway to observe strong multimode quantum noise reduction in these systems.

DUMITRU BOGDAN MIHALACHE, D.-M. Baboiu

Yujiro Eto, Akihiro Nonaka, Yun Zhang +1 more

We propose and demonstrate a scheme to stably generate quadrature-entangled optical pulses using a ring interferometer composed of an optical parametric amplifier and a dispersive media. The entangled light pulses at telecommunication wavelength are generated by combining two squeezed beams. In our scheme, the relative phase between the two beams is kept stable by the ring interferometer and is controllable using dispersive media. The amplitude and phase quadratures of the entangled beams are measured using two time-domain pulsed homodyne detectors. When the relative phase is fixed at $\ensuremath{\pi}/2$, we verify the inseparability of the states by a sufficient criterion $⟨{\ensuremath{\Delta}}^{2}[{\stackrel{\ifmmode \hat{}\else \^{}\fi{}}{X}}_{a}({\ensuremath{\phi}}_{0})+{\stackrel{\ifmmode \hat{}\else \^{}\fi{}}{X}}_{b}(\ensuremath{\pi}\ensuremath{-}{\ensuremath{\phi}}_{0})]⟩+⟨{\ensuremath{\Delta}}^{2}[{\stackrel{\ifmmode \hat{}\else \^{}\fi{}}{X}}_{a}({\ensuremath{\phi}}_{0}^{\ensuremath{'}})\ensuremath{-}{\stackrel{\ifmmode \hat{}\else \^{}\fi{}}{X}}_{b}(\ensuremath{-}{\ensuremath{\phi}}_{0}^{\ensuremath{'}})]⟩=0.64<1$ where ${\ensuremath{\phi}}_{0}^{\ensuremath{'}}\ensuremath{-}{\ensuremath{\phi}}_{0}=\ensuremath{\pi}/2$.