High intensity Raman interactions

Penzkofer, Alfons; Laubereau, A.; Kaiser, W.

doi:10.1016/0079-6727(79)90011-9

Cited by 292 publications

(122 citation statements)

References 231 publications

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“…Cross-phase modulation induces a frequency chirp to the signal pulse [10,54] (refractive index change is caused by pump pulses). Stimulated Raman scattering (j t -• UJR + cu y (i = L or SH) generates Stokes-shifted light at frequency CJ r and may deplete the pump pulse intensity [1,47]. The parametric gain factor /3 0 increases linearly with the effective pump pulbe intensity (/i/2) 1//2 .…”

Section: Limiting Processesmentioning

confidence: 99%

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Theoretical investigation of noncollinear phase-matched parametric four-photon amplification of ultrashort light pulses in isotropic media

Penzkofer

Lehmeier

1993

Opt Quant Electron

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The amplification of light signals (angular frequency UJS) in some isotropic media (D20, fused silica, and Schott type SF10 glasses) by noncollinear phase-matched parametric four-photon interaction u<\ + u 2 -> u$ + u\ is studied theoretically. Computer simulations are carried out for fundamental and second-harmonic pump pulses of a mode-locked Nd: glass laser. Degenerate interaction (wavelength A1=A2 = 1054nm or 527 nm) and nondegenerate interaction (A1= 1054nm/ A2 = 527nm) are considered. Characteristic phase-matching parameters and gain parameters versus wavelength are determined. Limitations by spectral bandwidth, optical absorption, optical damage, self-phase modulation, self-focusing and stimulated Raman scattering are analysed.

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Section: Limiting Processesmentioning

confidence: 99%

“…The steady-state Raman gain factor g R is related to the imaginary part of the Raman third-order nonlinear susceptibility XX1XX(-^R', <*>, •, -u t , u R ) = XR by [47] …”

Section: Stimulated Raman Scatteringmentioning

confidence: 99%

Theoretical investigation of noncollinear phase-matched parametric four-photon amplification of ultrashort light pulses in isotropic media

Penzkofer

Lehmeier

1993

Opt Quant Electron

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“…5,6 This inelastic scattering process can be either spontaneous or stimulated by a second interaction with the applied field. [7][8][9] Femtosecond lasers with bandwidths comparable to molecular vibrational frequencies (on the order of hundreds of wavenumbers) have made it possible to excite vibrations impulsively. [10][11][12][13] The dynamics of a slow vibrational system are probed through a perturbation that depends on its coupling to a fast electronic system.…”

Section: Introductionmentioning

confidence: 99%

“…[7][8][9]29 This paper focuses on x-ray analogues of multidimensional stimulated Raman techniques, using soft or hard x-ray pulses with bandwidths greater than 10 eV to create wavepackets of electronic excitations. The x-ray interaction involves single particle, field driven, transitions between core and valence electronic orbitals and the manybody valence response to a transiently created core-hole.…”

Section: Introductionmentioning

confidence: 99%

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Two-dimensional stimulated resonance Raman spectroscopy of molecules with broadband x-ray pulses

Biggs

Zhang

Healion

et al. 2012

The Journal of Chemical Physics

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Expressions for the two-dimensional stimulated x-ray Raman spectroscopy (2D-SXRS) signal obtained using attosecond x-ray pulses are derived. The 1D-and 2D-SXRS signals are calculated for trans-N-methyl acetamide (NMA) with broad bandwidth (181 as, 14.2 eV FWHM) pulses tuned to the oxygen and nitrogen K-edges. Crosspeaks in 2D signals reveal electronic Franck-Condon overlaps between valence orbitals and relaxed orbitals in the presence of the core-hole.

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Characterization of stimulated Raman scattering of hydrogen and methane gases as a light source for picosecond time-resolved Raman spectroscopy

Uesugi

Mizutani

Kruglik

et al. 2000

J. Raman Spectrosc.

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Stimulated Raman scattering (SRS) in compressed hydrogen and methane gas was characterized in terms of pulse energy, temporal width and spectral width in the range of gas pressures 10-60 atm to use it as a light source for picosecond time-resolved resonance Raman spectroscopy. SRS was pumped by the second harmonic of a Ti : sapphire oscillator-regenerative amplifier laser system with pulse energy up to 200 µJ, duration ∼2.5 ps and repetition rate 1 kHz. The output spectral region 421-657 nm was covered by the first and second Stokes SRS components on tuning of the pump wavelength in the range 375-425 nm. Energy conversion to the first Stokes SRS component was more than 10% with H 2 and more than 20% with CH 4 . The temporal width of the SRS pulse (1.1-2.1 ps) was shorter than that of the pump pulse. The spectral band shape was found to be modulated, since the SRS is generated in a transient regime. When more than 100 pulses were averaged, the temporal and spectral profiles of SRS pulses were sufficiently smooth and energy fluctuations were sufficiently small for spectroscopic applications. On the basis of the results obtained, optimized conditions as a Raman shifter were deduced. The Raman shifter served as a light source for two-color pump-probe time-resolved resonance Raman (TR 3 ) experiments and to demonstrate its capabilities, picosecond TR 3 spectra of nickel tetraphenylporphyrin in toluene solution were measured.

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High intensity Raman interactions

Cited by 292 publications

References 231 publications

Theoretical investigation of noncollinear phase-matched parametric four-photon amplification of ultrashort light pulses in isotropic media

Theoretical investigation of noncollinear phase-matched parametric four-photon amplification of ultrashort light pulses in isotropic media

Two-dimensional stimulated resonance Raman spectroscopy of molecules with broadband x-ray pulses

Characterization of stimulated Raman scattering of hydrogen and methane gases as a light source for picosecond time-resolved Raman spectroscopy

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