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 04:00:00 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.), Journal Name: Quantum Electronics (Woodbury, N.Y.) Journal Issue: 5 Vol. 28; ISSN 1063-7818
• Country of Publication: United States
• Language: English

Related Subjects

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