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

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.

Authors:
; ; ;
Publication Date:
OSTI Identifier:
20929735
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Optics; Journal Volume: 46; Journal Issue: 15; Other Information: DOI: 10.1364/AO.46.002963; (c) 2007 Optical Society of America; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; BOLOMETERS; CAMERAS; DOPED MATERIALS; GLASS; INTERFEROMETERS; MEASURING METHODS; NEODYMIUM; REFRACTIVE INDEX; RODS; SOLID STATE LASERS; SPECIFIC HEAT; TEMPERATURE MEASUREMENT; THERMOCOUPLES

Citation Formats

Wang Xiaobo, Xu Xiaojun, Lu Qisheng, and Xi Fengjie. Shack-Hartmann wavefront sensor measurement for dynamic temperature profiles in heat-capacity laser rods. United States: N. p., 2007. Web. doi:10.1364/AO.46.002963.
Wang Xiaobo, Xu Xiaojun, Lu Qisheng, & Xi Fengjie. Shack-Hartmann wavefront sensor measurement for dynamic temperature profiles in heat-capacity laser rods. United States. doi:10.1364/AO.46.002963.
Wang Xiaobo, Xu Xiaojun, Lu Qisheng, and Xi Fengjie. Sun . "Shack-Hartmann wavefront sensor measurement for dynamic temperature profiles in heat-capacity laser rods". United States. doi:10.1364/AO.46.002963.
@article{osti_20929735,
title = {Shack-Hartmann wavefront sensor measurement for dynamic temperature profiles in heat-capacity laser rods},
author = {Wang Xiaobo and Xu Xiaojun and Lu Qisheng and Xi Fengjie},
abstractNote = {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.},
doi = {10.1364/AO.46.002963},
journal = {Applied Optics},
number = 15,
volume = 46,
place = {United States},
year = {Sun May 20 00:00:00 EDT 2007},
month = {Sun May 20 00:00:00 EDT 2007}
}