Ultrabroad-bandwidth multifrequency Raman soliton pulse trains

McDonald, GS

doi:10.1364/ol.20.000822

Cited by 14 publications

(9 citation statements)

References 22 publications

(15 reference statements)

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“…The effect of sequentially generated higher order light has been studied in depth from a quasi-stationary, dimensionless, or noise free setup. 11,12,16,[24][25][26] We describe here a model for multi-harmonic Stokes light generated from noise.…”

Section: Multi-phonon Model (Mpm)mentioning

confidence: 99%

Four-dimensional multi-level stimulated rotational Raman scattering dynamics in air

McLaren

McCandless

Schrauth

et al. 2023

High Power Lasers for Fusion Research VII

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Stimulated rotational Raman scattering in air is a powerful parasitic process that degrades high intensity pulses propagated over significant distances. Through this inelastic scattering process, laser photons are converted to higher (Anti-Stokes) or lower (Stokes) energies, according to rotational mode transitions in the nitrogen and oxygen molecules. The full wave-mixing problem involves numerous frequencies including both Stokes and Anti-Stokes processes, multiple rotational line transitions, and multi-harmonic generation, with each generated field acting as a seed for subsequent scattering processes. Multiple numerical models of these processes were integrated into Lawrence Livermore National Laboratory's in-house nonlinear optical chain propagation software, Virtual Beamline++. The complex spatio-temporal dynamics of single, and multi-frequency stimulated rotational Raman scattering are highlighted and discussed. General limitations of steady-state, dynamic two-level, multi-harmonic, and multi-rotational models are demonstrated and compared.

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Section: Multi-phonon Model (Mpm)mentioning

confidence: 99%

Four-dimensional multi-level stimulated rotational Raman scattering dynamics in air

McLaren

McCandless

Schrauth

et al. 2023

High Power Lasers for Fusion Research VII

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“…[1][2][3][4][5][6][7][8][9][10][11][12][13] UMRG differs from conventional Raman conversion schemes in that two input beams of comparable intensity and shape are employed whose frequency separation matches the highestgain Raman resonance of the medium. This scheme is called resonant symmetric pumping, and its advantage is that a very wide comb of both Stokes and anti-Stokes components is rapidly generated.…”

Section: Introductionmentioning

confidence: 99%

Transverse effects in ultrabroadband multifrequency Raman generation

2000

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The theory of ultrabroadband multifrequency Raman generation is extended, for the first time, to allow for beam-propagation effects in one and two transverse dimensions. We show that a complex transverse structure develops even when diffraction is neglected. In the general case, we examine how the ultrabroadband multifrequency Raman generation process is affected by the intensity, phase quality, and width of the input beams, and by the length of the Raman medium. The evolution of power spectra, intensity profiles, and global characteristics of the multifrequency beams are investigated and explained. In the two-dimensional transverse case, bandwidths comparable to the optical carrier frequency, spanning the whole visible spectrum and beyond, are still achievable.

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“…All other fields are initially zero. In our previous work (McDonald et al 1994, 1995, McDonald 1995, we investigated UMRG in H 2 using input pulses of square, Gaussian and noisy character. While the duration and energy of the pump pulses were found to be important parameters, the bandwidth and energy spectra generated were found to be remarkably insensitive to the particular choice of input pulse shape (provided that the pumping remained symmetric).…”

mentioning

confidence: 99%

“…Our analyses of dispersionless UMRG predict that, under CW conditions, a bandwidth of B ≈ B 0 = ω 0 /ω R is possible (Losev and Lutsenko 1993) and that, in the highly transient regime, this figure may be enhanced by around 40% (Losev and Lutsenko 1996). However, numerical simulations have shown that background dispersion plays a critical role in determining the generated bandwidth (McDonald et al 1994, 1995, McDonald 1995. In physical terms, the absence of dispersion (γ 1 = 0) implies exact phase-matching and this maximizes the amount of gain suppression (Shen and Bloembergen 1965).…”

mentioning

confidence: 99%

On the generation of ultra-broad bandwidth light in air at atmospheric pressure

McDonald

New

Losev

et al. 1997

J. Phys. B: At. Mol. Opt. Phys.

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We predict that ultra-broadband light consisting of over 150 distinct frequencies of comparable energy can be generated in air at atmospheric pressure by stimulated Raman scattering using resonant symmetric pumping. Nanosecond input pulses and the highest available intensities are found to be optimal. Gain suppression analysis, incorporating a finite Stokes shift, gives a qualitative explanation of the pumping requirements.

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Ultrabroad-bandwidth multifrequency Raman soliton pulse trains

Cited by 14 publications

References 22 publications

Four-dimensional multi-level stimulated rotational Raman scattering dynamics in air

Four-dimensional multi-level stimulated rotational Raman scattering dynamics in air

Transverse effects in ultrabroadband multifrequency Raman generation

On the generation of ultra-broad bandwidth light in air at atmospheric pressure

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