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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 37, Iss. 30 — Oct. 20, 1998
  • pp: 7044–7048

Dynamic correction of thermal focusing in Nd:YAG confocal unstable resonators by use of a variable radius mirror

Inon Moshe, Steven Jackel, and Raphael Lallouz  »View Author Affiliations


Applied Optics, Vol. 37, Issue 30, pp. 7044-7048 (1998)
http://dx.doi.org/10.1364/AO.37.007044


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Abstract

Excellent beam quality and divergence stability over a wide pump power range was demonstrated in a Q-switched, Nd:YAG, positive branch confocal unstable resonator by using a one degree-of-freedom, adaptive optic. Unlike single-element flexible-membrane mirrors, the variable radius mirror (VRM) consisted of a lens and mirror, whose separation determined the VRM’s effective radius of curvature. This simple method enabled low cost and efficient thermal focusing compensation. The VRM was demonstrated by producing a 300-mJ Q-switch or 1-J free-running at a beam quality factor M2 that varied between 1.2 and 1.8 as the average output power varied between 0 and 33 W.

© 1998 Optical Society of America

OCIS Codes
(010.0010) Atmospheric and oceanic optics : Atmospheric and oceanic optics
(010.1080) Atmospheric and oceanic optics : Active or adaptive optics
(350.6830) Other areas of optics : Thermal lensing

History
Original Manuscript: June 22, 1998
Revised Manuscript: July 13, 1998
Published: October 20, 1998

Citation
Inon Moshe, Steven Jackel, and Raphael Lallouz, "Dynamic correction of thermal focusing in Nd:YAG confocal unstable resonators by use of a variable radius mirror," Appl. Opt. 37, 7044-7048 (1998)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-37-30-7044

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