New Investigations of Thermal and Stimulated Molecular Scattering of Light

Starunov, V.S.; Fabelinskiĭ, Immanuil L.

doi:10.3367/ufnr.0099.196909h.0143

Cited by 1 publication

(2 citation statements)

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“…(1) the master oscillator and (2) the preamplifier based on the first ELI-91 XeCl laser; (3,12,18) the beamsplitters; (4) the Fabry-Perot etalon and (5) the prism of the spectrum analyzer; (6) the luminescent screen; (7,20) the cameras; (8) the two-passes amplifier based on the second ELI-91 XeCl laser; (9) the lens with one of three possible focal lengths 11, 50, 100 F or or cm = ; (10) the cell filled with hexane; (11) the FEK-29KPU photodiode and (16) the S7-19 oscilloscope of the time-domain analyzer; (13,19) the mirrors; (14,15) the neutral filters; (17) the divergence analyzer lens with the focal length…”

Section: Fig 1 Experimental Setup For the Investigation Of The Stimmentioning

confidence: 99%

“…Theoretical studies of SS have mostly relied on experimental results obtained for the near-IR region, and the modern SS theory applies only to linearly absorbing media [1 -5, 11, 12]. The theory of stimulated thermal scattering (STS) proposed in [13,14] . Note that in this experiment the decrease in the reflection coefficient was due to the decrease in the PC fidelity for the "Brillouin" mirror.…”

Section: Introductionmentioning

confidence: 99%

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Stimulated Thermal Scattering Induced by Two-Photon Absorption and Experimental Observation of the Genuine Stimulated Brillouin Scattering in the Near-Ultraviolet Region

Карпов¹

2015

AJOP

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Part of the experimental measurements of the frequency shift and the phase-conjugation (PC) fidelity gained from previous studies of stimulated scattering (SS) of nanosecond (5~10 ns) near-ultraviolet (UV) (193~351 nm λ =) laser pulses in liquids (hexane, heptane, and others) are found to disagree with the theory of SS, which takes into account only the linear (single-photon) light absorption. To resolve the inconsistency, SS of XeCl excimer laser radiation (308 nm λ =) with the duration of 8 ns in liquid hexane is investigated experimentally. A theoretical analysis of the results obtained revealed three new nonlinear optical phenomena induced by the heating due to two-photon absorption: stimulated thermal scattering (two-photon STS-2), phase mismatch for stimulated Brillouin scattering (SBS), and phase self-modulation. Experimental SS spectrum contains two new lines-a previously unknown two-photon STS-2 line and a genuine SBS line newly discovered in the near-UV region.

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