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Proceedings Paper

Technological Nd lasers with adaptive cavity and their application
Author(s): Anatoly N. Kravets; Igor I. Trifonov; Andrey V. Gavrilov; Igor V. Shilov; Andrey V. Ruljov
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Paper Abstract

Are known powerful technological YAG:Nd-lasers with passive Q-switching on a LiF:F2- crystal. At use of the unstable resonator with a convex mirror was received single- mode pulse-periodic radiation with high spatial brightness, small divergence and large coherent length. The phase conjugation of technological Nd-lasers on the dynamic hologram in a LiF:F2- crystal has allowed to increase efficiency of laser processing. In the present work the modes of generation and technological opportunities of YAG:Nd-lasers and on Nd-glass c by adaptive resonators on a basis of Sagnac interferometer (SI) are investigated at pulse-periodic pumping. Phase conjugation and passive Q- switching were carried out simultaneously with the help of a LiF:F2- crystal, placed in SI. Crystal transparency linearly changes on length, therefore by moving of a crystal normally to an optical axis it is possible over a wide range to operate power and temporary parameters of laser radiation. High power and spatial parameters of radiation, as the opportunity of their control, directly during processing by crystal moving, have allowed effectively to carry out the calibrated drilling in various materials by a diameter 50 - 400 micrometers and depth up to 20 mm. For increase of efficiency of fragile materials destruction the combination of spatial and temporary modulation of laser radiation was used. The formation in a volume or on the material's surface of alternating areas with high gradients of thermally induced pressure has allowed to decrease the destruction's power threshold in some times. Besides by optimization of spatial parameters it is possible to improve quality of laser processing by decreasing thermally induced pressure and deformations.

Paper Details

Date Published: 13 May 1998
PDF: 10 pages
Proc. SPIE 3267, Laser Resonators, (13 May 1998); doi: 10.1117/12.308121
Show Author Affiliations
Anatoly N. Kravets, Kovrov State Technological Academy (Russia)
Igor I. Trifonov, Kovrov State Technological Academy (Russia)
Andrey V. Gavrilov, Kovrov State Technological Academy (Russia)
Igor V. Shilov, Kovrov State Technological Academy (Russia)
Andrey V. Ruljov, Kovrov State Technological Academy (Russia)

Published in SPIE Proceedings Vol. 3267:
Laser Resonators
Alexis V. Kudryashov; Pierre Galarneau, Editor(s)

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