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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: James C. Wyant
  • Vol. 46, Iss. 15 — May. 20, 2007
  • pp: 2963–2968

Shack–Hartmann wavefront sensor measurement for dynamic temperature profiles in heat-capacity laser rods

Xiaobo Wang, Xiaojun Xu, Qisheng Lu, and Fengjie Xi  »View Author Affiliations


Applied Optics, Vol. 46, Issue 15, pp. 2963-2968 (2007)
http://dx.doi.org/10.1364/AO.46.002963


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Abstract

A Shack–Hartmann sensor nonintrusive measurement for the temperature profile in a heat-capacity neodymium-doped glass rod is proposed. This technique is possible because the optical path length of the rod changes with temperature linearly over a wide range. The temperature change of the solid-state laser rod is often recorded by using a thermocouple, thermal camera, or phase-shifting interferometer. Based on an analysis of temperature-induced changes in length and index of refraction, we can get the temperature profiles from the wavefront reconstructions in real time. The results suggest the Shack–Hartmann sensors could replace microbolometer-based thermal cameras and phase-shifting interferometers for dynamic temperature profiles in heat-capacity laser rods with particular advantages. A strange temperature chaos of the Nd:glass rod just after the pump cycle is discovered.

© 2007 Optical Society of America

OCIS Codes
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(120.6780) Instrumentation, measurement, and metrology : Temperature

ToC Category:
Instrumentation, Measurement, and Metrology

History
Original Manuscript: October 10, 2006
Revised Manuscript: December 7, 2006
Manuscript Accepted: January 9, 2007
Published: May 1, 2007

Citation
Xiaobo Wang, Xiaojun Xu, Qisheng Lu, and Fengjie Xi, "Shack-Hartmann wavefront sensor measurement for dynamic temperature profiles in heat-capacity laser rods," Appl. Opt. 46, 2963-2968 (2007)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-46-15-2963


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