Influence of Thermal Deformations of the Output Windows of High-Power Laser Systems on Beam Characteristics
Applied Optics, Vol. 43, Issue 35, pp. 6465-6472 (2004)
http://dx.doi.org/10.1364/AO.43.006465
Acrobat PDF (852 KB)
Abstract
By using the well-known Green’s function methods, we study the three-dimensional temperature distributions and thermal deformations of the output windows of unstable optical resonators induced by an incident annular laser beam. Some expressions and theoretical profiles of the temperature distributions and thermal deformations as functions of the radius and of the thickness of optical windows are obtained. Moreover, the influence of the thermal deformations of sapphire, silica, and silicon windows within unstable optical resonators on the Strehl ratio and on the far-field laser intensity distribution is also discussed. Under conditions of 50-kW intense laser irradiation during 5 s, the maximum thermal deformation in sapphire, silica, and silicon substrates is 1.993, 0.393, and 6.251 μm, respectively. Under the same conditions the Strehl ratio of sapphire is higher than that of silica.
© 2004 Optical Society of America
OCIS Codes
(140.1550) Lasers and laser optics : Chemical lasers
(140.3330) Lasers and laser optics : Laser damage
(140.3410) Lasers and laser optics : Laser resonators
(140.6810) Lasers and laser optics : Thermal effects
(260.1960) Physical optics : Diffraction theory
(350.5340) Other areas of optics : Photothermal effects
Citation
Yufeng Peng, Zhaoxia Sheng, Hu Zhang, and Xiaowei Fan, "Influence of Thermal Deformations of the Output Windows of High-Power Laser Systems on Beam Characteristics," Appl. Opt. 43, 6465-6472 (2004)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-43-35-6465
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