Enhancement of the brightness of radiation from a high-power phosphate- glass Nd/sup 3 +/ laser by spatial filtering of the beam in an amplifying channel

Journal Article · Wed Aug 01 04:00:00 EDT 1979 · Sov. J. Quant. Electron. (Engl. Transl.); (United States)

DOI:https://doi.org/10.1070/QE1979v009n08ABEH009391· OSTI ID:5583492

Alekseev, V N; Starikov, A D; Charukhchev, A V; Chernov, V N

An experimental investigation was made of the influence of spatial filtering on the brightness of the output beam from the amplifying channel of a high-power laser system in which the active elements were Nd/sup 3 +/-doped phosphate glass rods. It was found that the brightness of the output beam could be increased substantially by an appropriate choice of the parameters of a vacuum spatial filter. A beam 40 mm in diameter with a peak intensity of 3.4 GW/cm/sup 2/ was obtained. Small-scale self-focusing did not cause appreciable energy losses in an angle of 0.25 mrad. The possible criteria for estimating the influence of small-scale self-focusing on the brightness of the beam being amplified were considered; that these criteria should be useful in the development of systems of amplifying channels with periodic spatial filtering is discussed.

• OSTI ID: 5583492
• Journal Information: Sov. J. Quant. Electron. (Engl. Transl.); (United States), Journal Name: Sov. J. Quant. Electron. (Engl. Transl.); (United States) Vol. 9:8; ISSN SJQEA
• Country of Publication: United States
• Language: English

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AMPLIFIERS
BRIGHTNESS
ELECTRONIC EQUIPMENT
FILTERS
FOCUSING
GLASS
LASER FUSION REACTORS
LASERS
NEODYMIUM LASERS
OPTICAL PROPERTIES
OXYGEN COMPOUNDS
PHOSPHATES
PHOSPHORUS COMPOUNDS
PHYSICAL PROPERTIES
SOLID STATE LASERS
THERMONUCLEAR REACTORS