Generation of the second and third harmonics of the radiation of a subpicosecond neodymium laser with a 10{sup 12} contrast on a metal target

Journal Article · Sun May 31 04:00:00 EDT 1998 · Quantum Electronics (Woodbury, N.Y.)

DOI:https://doi.org/10.1070/QE1998V028N05ABEH001247· OSTI ID:21442555

Losev, Leonid L; Soskov, V I ^[1]

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1. P.N. Lebedev Physics Institute, Russian Academy of Sciences, Moscow (Russian Federation)

A neodymium laser with a master Raman oscillator, generating pulses of 0.8 ps duration and of 10{sup 12} contrast, was used to study harmonic generation by the interaction of radiation of 10{sup 15}-10{sup 16} W cm{sup -2} intensity with a metal target. When the laser pulse had the p polarisation (the angle of incidence of the radiation on the target was 45{sup 0}C), the second and third harmonics were generated by anharmonic motion of electrons on the plane plasma-vacuum interface. The energy efficiencies of conversion to the second and third harmonics depended weakly on the laser radiation intensity I (they were proportional to I{sup 0.2}) and amounted to {approx}1.5x10{sup -5} and {approx}0.8x10{sup -5}, respectively. When the pulse had the s polarisation, the generation efficiency fell by a factor of 10 for the second harmonic and by a factor more than 10{sup 3} for the third harmonic. (nonlinear optical phenomena and devices)

• OSTI ID: 21442555
• Journal Information: Quantum Electronics (Woodbury, N.Y.), Journal Name: Quantum Electronics (Woodbury, N.Y.) Journal Issue: 5 Vol. 28; ISSN 1063-7818
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
EFFICIENCY
ELECTROMAGNETIC RADIATION
ELECTRONS
ELEMENTARY PARTICLES
ELEMENTS
ENERGY EFFICIENCY
FERMIONS
FREQUENCY MIXING
HARMONIC GENERATION
INCIDENCE ANGLE
LASER RADIATION
LASER TARGETS
LASERS
LEPTONS
METALS
NEODYMIUM LASERS
PLASMA
POLARIZATION
PULSES
RADIATIONS
SOLID STATE LASERS
TARGETS