Spectral and far-field broadening due to stimulated rotational Raman scattering driven by the Nike krypton fluoride laser

被引：36

作者：

Weaver, James ^{[1
]}

Lehmberg, Robert ^{[2
]}

Obenschain, Stephen ^{[1
]}

Kehne, David ^{[1
]}

Wolford, Matthew ^{[1
]}

机构：

[1] Naval Res Lab, Div Plasma Phys, Washington, DC 20375 USA

[2] Res Support Instruments, 4325-B Forbes Blvd, Lanham, MD 20706 USA

来源：

APPLIED OPTICS | 2017年 / 56卷 / 31期

关键词：

INDUCED SPATIAL INCOHERENCE; NONLINEAR REFRACTIVE-INDEX; KRF FUSION LASERS; PULSE-PROPAGATION; GAIN SUPPRESSION; INERTIAL FUSION; 248; NM; AIR; NONUNIFORMITIES; FILAMENTATION;

D O I：

10.1364/AO.56.008618

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Stimulated rotational Raman scattering (SRRS) in the ultraviolet region (lambda = 248 nm) has been observed at the Nike laser over extended propagation paths in air during high power operation. Although this phenomenon is not significant for standard operating configurations at Nike, broadening of the laser spectrum and far-field focal profiles has been observed once the intensity-path length product exceeds a threshold of approximately 1 TW/cm. This paper presents experimental results and a new theoretical evaluation of these effects. The observations suggest that significantly broader spectra can be achieved with modest degradation of the final focal distribution. These results point to a possible path for enhanced laser-target coupling with the reduction of laser-plasma instabilities due to broad laser bandwidth produced by the SRRS.

引用

页码：8618 / 8631

页数：14

共 45 条

[1]

Atzeni S., 2004, The Physics of Inertial Fusion - Beam Plasma Interaction, Hydrodynamics, Hot Dense Matter

[2]

Bloembergen N., 1992, Nonlinear Optics

[3] Direct-drive laser fusion: Status and prospects [J].

Bodner, SE ;

Colombant, DG ;

Gardner, JH ;

Lehmberg, RH ;

Obenschain, SP ;

Phillips, L ;

Schmitt, AJ ;

Sethian, JD ;

McCrory, RL ;

Seka, W ;

Verdon, CP ;

Knauer, JP ;

Afeyan, BB ;

Powell, HT .

PHYSICS OF PLASMAS, 1998, 5 (05) :1901-1918

[4]

Boyd RW, 2008, NONLINEAR OPTICS, 3RD EDITION, P1

[5] Nonlinear optical pulse propagation in the single-cycle regime [J].

Brabec, T ;

Krausz, F .

PHYSICAL REVIEW LETTERS, 1997, 78 (17) :3282-3285

[6] High-resolution imaging spectrometer for recording absolutely calibrated far ultraviolet spectra from laser-produced plasmas [J].

Brown, Charles M. ;

Seely, John F. ;

Feldman, Uri ;

Holland, Glenn E. ;

Weaver, James L. ;

Obenschain, Steven P. ;

Kjornrattanawanich, Benjawan ;

Fielding, Drew .

REVIEW OF SCIENTIFIC INSTRUMENTS, 2008, 79 (10)

[7] THEORY OF STOKES PULSE SHAPES IN TRANSIENT STIMULATED RAMAN SCATTERING [J].

CARMAN, RL ;

SHIMIZU, F ;

WANG, CS ;

BLOEMBERGEN, N .

PHYSICAL REVIEW A-GENERAL PHYSICS, 1970, 2 (01) :60-+

[8] Comparison between measured and calculated nonuniformities of Nike laser beams smoothed by induced spatial incoherence [J].

Deniz, AV ;

Lehecka, T ;

Lehmberg, RH ;

Obenschain, SP .

OPTICS COMMUNICATIONS, 1998, 147 (4-6) :402-410

[9] PARAMETRIC RAMAN GAIN SUPPRESSION IN D-2 AND H-2 [J].

DUNCAN, MD ;

MAHON, R ;

REINTJES, J ;

TANKERSLEY, LL .

OPTICS LETTERS, 1986, 11 (12) :803-805

[10]

Edlen B., 1966, Metrologia, V2, P71, DOI DOI 10.1088/0026-1394/2/2/002

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