Study of Filamentation Threshold in Zinc Selenide

Durand, Magali; Houard, Aurélien; Lim, Khan; Durécu, Anne; Vasseur, Olivier; Richardson, Martin

doi:10.1364/cleo_si.2014.sth1e.7

Cited by 5 publications

(6 citation statements)

References 7 publications

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“…Avalanche excitation is limited because the electrons are not accelerated enough during the short laser pulsewidth. Therefore, at the intensities and pulsewidths used in our experiments, optical breakdown does not occur [36][37][38]. When comparing the NLA cross section and the ESA cross section for the samples A and B, we notice very similar parameters which point out the negligible impact of contaminant in the measured MIR NLA.…”

Section: Discussionsupporting

confidence: 52%

Mid-infrared nonlinear absorption in As_2S_3 chalcogenide glass

et al. 2016

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We report mid-infrared (MIR) nonlinear absorption in As₂S₃ glasses which results from two-photon excitation of valence electron to the Urbach extension followed by strong linear absorption of excited states. The measured MIR nonlinear absorption can be 3 to 4 orders of magnitude stronger than the two-photon absorption in the near-infrared for similar laser intensities and does not result from contaminants, but it is intrinsic to As₂S₃ glasses. As₂S₃ fibers are widely used to generate supercontinuum by pumping them with high peak power laser pulses. For a 100 kilowatt peak power MIR soliton propagating in single mode As₂S₃ fiber, the nonlinear absorption can be of similar magnitude than the fiber background loss. Finally, for laser peak power around 1 MW, the MIR nonlinear absorption can be ~2 orders of magnitude larger than the fiber background loss in single mode As₂S₃ fiber.

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Section: Discussionsupporting

confidence: 52%

Mid-infrared nonlinear absorption in As_2S_3 chalcogenide glass

et al. 2016

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“…In this work, we observed SC generation and HHG/IHC to 7th order via RQPM using ultrafast MIR pulses in poly-ZnSe, extending previous results [12,17] to longer wavelengths. Contrasting with previous works [6,11,13,14], in this study both the transmitted fundamental and generated harmonics were studied experimentally and theoretically. Sample thickness was varied, with a maximum thickness of 4 cm.…”

Section: Introductionmentioning

confidence: 92%

“…Longer wavelengths lead to increased spectral broadening through self-phase modulation (SPM) and filamentation in poly-ZnSe [11][12][13]. As a result, interest in the MIR nonlinear properties of RQPM and poly-ZnSe has continued to grow [14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Ultrafast mid-infrared high harmonic and supercontinuum generation with n₂ characterization in zinc selenide

et al. 2019

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“…Filamentation of mid-IR fs pulses in ZnSe and ZnS has attracted recent attention. The formation of filaments has been observed in ZnSe pumped well above the critical power by a kilohertz OPA tunable from 0.4 µm to 2.5 µm with 6-20 µJ pulse energy and ~30 fs pulse duration [18]. It was shown that the long-wavelength pumping is very favorable for the formation of filaments in ZnSe due to higher multiplicity of the multi-photon ionization (2.7 eV bandgap of ZnSe corresponds to six-photon ionization at 2.4 µm pump wavelength).…”

Section: Introductionmentioning

confidence: 97%

Multi-Watt mid-IR femtosecond polycrystalline Cr^2+:ZnS and Cr^2+:ZnSe laser amplifiers with the spectrum spanning 20–26 µm

Vasilyev¹,

Moskalev²,

Mirov³

et al. 2016

Opt. Express

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We demonstrate efficient amplification of few-optical-cycle mid-IR pulses in single-pass continuously pumped laser amplifiers based on polycrystalline Cr(2+):ZnS and Cr(2+):ZnSe. The 1.7 W output of a Kerr-lens mode-locked master oscillator at 2.4 µm central wavelength, 79 MHz repetition rate was amplified to 7.1 W and 2.7 W in Cr(2+):ZnS and Cr(2+):ZnSe, respectively. High peak power of the input pulses (0.5 MW) and high nonlinearity of the amplifiers' gain media resulted in a significant shortening of the output pulses and in spectral broadening. Transform-limited 40 fs pulses of the master oscillator were compressed to about 27-30 fs. The spectrum of the pulses was broadened from 136 nm to 450 nm (at -3 dB level); the span of the spectra exceeds 600 nm at -10 dB level.

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Study of Filamentation Threshold in Zinc Selenide

Cited by 5 publications

References 7 publications

Mid-infrared nonlinear absorption in As_2S_3 chalcogenide glass

Mid-infrared nonlinear absorption in As_2S_3 chalcogenide glass

Ultrafast mid-infrared high harmonic and supercontinuum generation with n₂ characterization in zinc selenide

Multi-Watt mid-IR femtosecond polycrystalline Cr^2+:ZnS and Cr^2+:ZnSe laser amplifiers with the spectrum spanning 20–26 µm

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Study of Filamentation Threshold in Zinc Selenide

Cited by 5 publications

References 7 publications

Mid-infrared nonlinear absorption in As_2S_3 chalcogenide glass

Mid-infrared nonlinear absorption in As_2S_3 chalcogenide glass

Ultrafast mid-infrared high harmonic and supercontinuum generation with n2 characterization in zinc selenide

Multi-Watt mid-IR femtosecond polycrystalline Cr^2+:ZnS and Cr^2+:ZnSe laser amplifiers with the spectrum spanning 20–26 µm

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Ultrafast mid-infrared high harmonic and supercontinuum generation with n₂ characterization in zinc selenide