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Optics Letters

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  • Vol. 29, Iss. 24 — Dec. 15, 2004
  • pp: 2899–2901

Thermal effects of a laser beam tube consisting of a window and nonflowing gas

Jianzhu An, Youkuan Li, and Xiangwan Du  »View Author Affiliations


Optics Letters, Vol. 29, Issue 24, pp. 2899-2901 (2004)
http://dx.doi.org/10.1364/OL.29.002899


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Abstract

High-energy laser systems include an optical train and a gas medium that must be capable of transporting and directing the beam. The optical train is termed a laser beam tube. Because of the finite absorption of laser energy, the thermal effects of the beam tube make the beam diffuse and cause degradation of the laser beam’s quality. We study systematically a beam tube consisting of a laser window made from white bijou (i.e., Al2O3) or fused silica and a tube of nonflowing nitrogen or helium gas. The results show that the thermal effects of the window and the gas on the beam neutralize each other; in particular, in some cases they compensate for each other completely, such that the beam tube has no effect on the beam quality in spite of the fact that separately each has a severe effect. We explain how to acquire the specific cases.

© 2004 Optical Society of America

OCIS Codes
(010.3310) Atmospheric and oceanic optics : Laser beam transmission
(140.6810) Lasers and laser optics : Thermal effects
(220.1000) Optical design and fabrication : Aberration compensation
(350.6830) Other areas of optics : Thermal lensing

Citation
Jianzhu An, Youkuan Li, and Xiangwan Du, "Thermal effects of a laser beam tube consisting of a window and nonflowing gas," Opt. Lett. 29, 2899-2901 (2004)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-29-24-2899


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