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Proceedings Paper

Mach-Zehnder interferometric measurement of laser heating/cooling in Yb3+: YAG
Author(s): Carlton Farley; B. Rami Reddi
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Paper Abstract

A 915 nm T:Sapphire laser was used to excite luminescence from Yb3+ doped YAG crystal. The excited ions undergo nonradiative relaxation followed by strong emission at 1030 nm. The heating produced by the nonradiative relaxation increases the sample temperature. A Mach-Zehnder interferometer was setup with 514.5 nm Ar+ laser beam. Laser heating causes the interferometer fringes to move. A mathematical formula was developed to estimate the change in sample temperature from the fringe count. When 300mW Ti:Sapphire laser beam was focused through the YAG:Yb3+crystal its temperature increased by 6.9°C. This technique works equally well to measure the solid sample temperature changes in laser cooling studies.

Paper Details

Date Published: 8 February 2011
PDF: 8 pages
Proc. SPIE 7951, Laser Refrigeration of Solids IV, 79510I (8 February 2011); doi: 10.1117/12.873944
Show Author Affiliations
Carlton Farley, Alabama A&M Univ. (United States)
B. Rami Reddi, Alabama A&M Univ. (United States)

Published in SPIE Proceedings Vol. 7951:
Laser Refrigeration of Solids IV
Richard Epstein; Mansoor Sheik-Bahae, Editor(s)

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