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JOURNALS // Kvantovaya Elektronika // Archive

Kvantovaya Elektronika, 1979 Volume 6, Number 8, Pages 1666–1671 (Mi qe9391)

This article is cited in 3 papers

Enhancement of the brightness of radiation from a highpower phosphate- glass Nd3+ laser by spatial filtering of the beam in an amplifying channel

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


Abstract: 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 Nd3+-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/cm2 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. These criteria should be useful in the development of systems of amplifying channels with periodic spatial filtering.

UDC: 621.375.9:535

PACS: 42.55.Rz, 28.50.Re

Received: 09.11.1978


 English version:
Soviet Journal of Quantum Electronics, 1979, 9:8, 981–984


© Steklov Math. Inst. of RAS, 2025