Stimulated rotational Raman scattering in air with a high-power broadband laser

We study the growth of stimulated rotational Raman scattering (SRRS) from noise by propagating one beam of the OMEGA fusion laser over a 35-m path in air. The spectrum at the end of the path is measured and calibrated to give the energy scattered into all the Stokes lines. Pure phase-modulated bandw...

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Bibliographic Details
Published in:Optics letters 1991-03, Vol.16 (6), p.366-368
Main Authors: SKELDON, M. D, BAHR, R
Format: Article
Language:English
Subjects:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700208 - Fusion Power Plant Technology- Inertial Confinement Technology
AIR
BEAM TRANSPORT
COHERENT SCATTERING
ELECTROMAGNETIC RADIATION
Exact sciences and technology
FLUIDS
Fundamental areas of phenomenology (including applications)
GASES
LASER FUSION REACTORS
LASER RADIATION
NONLINEAR OPTICS
OMEGA FACILITY
OPTICS
Physics
RADIATIONS
RAMAN SPECTRA
SCATTERING
SPECTRA
THERMONUCLEAR REACTORS
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Summary:We study the growth of stimulated rotational Raman scattering (SRRS) from noise by propagating one beam of the OMEGA fusion laser over a 35-m path in air. The spectrum at the end of the path is measured and calibrated to give the energy scattered into all the Stokes lines. Pure phase-modulated bandwidth as well as the bandwidth known as smoothing by spectral dispersion (SSD) are installed on the laser. The experimental results show that the threshold for SRRS is unchanged when one uses a pure phase-modulated bandwidth and increases when one uses a SSD bandwidth.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.16.000366