Processes limiting the output energy of Nd{sup 3+}:YAG lasers with a phase-conjugate mirror based on stimulated Brillouin scattering

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

DOI:https://doi.org/10.1070/QE1998V028N05ABEH001228· OSTI ID:21442564

Batishche, S A; Kuz'muk, A A; Malevich, N A ^[1]

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1. B.I. Stepanov Institute of Physics, National Academy of Sciences of Belarus, Minsk (Belarus)

It was established that the main processes limiting the output energy of powerful Nd{sup 3+}:YAG laser systems, comprising a master oscillator and a multipass amplifier with a phase-conjugate mirror based on stimulated Brillouin scattering (SBS), were: first, self-excitation of the amplifier involving Rayleigh scattering in the SBS medium and, second, two-pass amplified spontaneous emission of radiation propagating along the active elements of the amplifier. A comparison of various multipass amplifier configurations showed that the maximum output energy of a two-pass system was 3-4 times higher than the maximum output energy of a four-pass system because of the higher threshold of the appearance of these power-limiting processes. Under optimal conditions the small-signal gain per one pass through the amplifier was {approx}(2-3)x10{sup 4}. The output energy density then reached {approx}3.75 J cm{sup -2} and was practically independent of the reflection coefficient of the phase-conjugate mirror and of the energy density of the input signal (beginning from {approx}0.1 mJ cm{sup -2}). (lasers and amplifiers)

• OSTI ID: 21442564
• Journal Information: Quantum Electronics (Woodbury, N.Y.), Vol. 28, Issue 5; Other Information: DOI: 10.1070/QE1998v028n05ABEH001228; ISSN 1063-7818
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
AMPLIFIERS
BRILLOUIN EFFECT
COMPARATIVE EVALUATIONS
EMISSION
ENERGY DENSITY
EXCITATION
MIRRORS
NEODYMIUM IONS
NEODYMIUM LASERS
OSCILLATORS
RAYLEIGH SCATTERING
REFLECTION
SIGNALS
CHARGED PARTICLES
COHERENT SCATTERING
ELECTRONIC EQUIPMENT
ENERGY-LEVEL TRANSITIONS
EQUIPMENT
EVALUATION
IONS
LASERS
SCATTERING
SOLID STATE LASERS