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Laser Physics Letters

Seeded spontaneous parametric four-wave mixing and fluorescence of Pr3+:YSO

Huaibin Zheng, Changbiao Li, Huayan Lan, Chengjun Lei, Dan Zhang, Yanpeng Zhang, Min Xiao

Published Oct 13, 2014• 10 citations
Publisher

Abstract

We demonstrate the seeded spontaneous parametric four-wave mixing (SP-FWM) process associated with the fluorescence signals of Pr 3+ :YSO both theoretically and experimentally. For the first time, the dressed SP-FWM processes are observed by self-dressing and/or external-dressing in this crystal. Various possible amplification processes are discussed by selectively seeding various multi-wave mixing (MWM) signals. Two contributions of the dressing effect and the dipole–dipole interaction to the linewidths of the SP-FWM signal and the conjugate signal of the seeding MWM signal associated with the fluorescence signal have been distinguished. In addition, the Autler–Townes-like (or Autler–Townes) splitting effect of the fluorescence spectrum induced by itself (or external) field and the mutual interaction between two fluorescence signals are investigated which are well explained using the presented theoretical model. Such results can find potential applications in all-optical communication and optical information processing on a photonic chip.

DOI
10.1088/1612-2011/11/11/116102

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Lifetime Polarization of Dressed Multiorder Fluorescence and Spontaneous Parametric Four-Wave Mixing in Pr 3+^{3+}3+ :YSO
We investigate lifetime (induced dipole–dipole interaction) of spontaneous parametric four-wave mixing (SP-FWM) and multiorder fluorescence (FL) signals controlled by polarization dressing in a heteronuclear-like molecule system of Pr$^{3+} $:YSO. The comparisons between a lifetime of SP-FWM and multiorder FL controlled by single dressing, double dressing, and triple dressing polarization have been investigated. It is observed that FLs have a stronger dressing effect than SP-FWM. The polarization dressing is more obvious in the intensity signal in the spectral domain than that in the time domain. Such results have potential applications in quantum communication such as optical information storage, routing, and processing on a photonic chip.
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We report the competition between the spontaneous parametric four-wave mixing and second- or fourth-order fluorescence (FL) signals in Pr 3+ :Y 2 SiO 5 crystal. By changing the powers of controlling fields and blocking different fields, the competitive two signals can be identified through the dressing effect. Meanwhile, the delay of fourth-order FL in the time domain results from splitting the energy level. Such results can find potential applications in optical information storage and processing on a photonic chip.
For the first time to our knowledge, a dressed spontaneous parametric four-wave mixing (SP-FWM) process and fluorescence (FL) signals in hot alkali atom vapor are demonstrated in both theory and experiment. First, by scanning pumping fields, Autler–Townes (AT) splitting in SP-FWM and two-photon suppression dip in FL are observed. Then, by scanning coupling fields, single-, double-, and triple-dressed effect on those signals is demonstrated, such as suppression and/or enhancement of SP-FWM signal and suppressed two-photon emission peak of FL. The interaction effect between dressing fields on SP-FWM and FL signals is also observed. Such investigations can find potential applications in multichannel narrowband long-distance communication.
We report the measured dressed lifetimes of fourth-order fluorescence and spontaneous parametric four-wave mixing signals by the perturbation chain method in a two-level and heteronuclear-like molecule system of Pr3+:YSO both in theory and experiment. The lifetime of the fourth-order fluorescence depends on the nonlinear processes in the perturbation chain, and can be modulated by the dark state due to the dressing effect and the induced dipole–dipole interaction by changing the frequency detuning and power of the controlling field. Such results can find potential applications in all-optical communication and optical information processing on photonic chips.