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Proceedings Paper

Conceptual study of a fiber-optical approach to solid-state laser cooling
Author(s): Dan T. Nguyen; Christopher Shanor; Jie Zong; Wenyan Tian; Zhidong Yao; Jianfeng Wu; Jeff Weiss; Rolf Binder; Arturo Chavez-Pirson
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Paper Abstract

Optical cooling in an all fiber system using fiber laser pumps and cooling fibers doped with rare earth ions has been investigated both theoretically and experimentally. A 2% Tm doped germanate glass was selected from glasses with different Tm concentrations 0.5, 1, 2, 3, 4, 5, 6, 8 and 10% wt for fabrication of the cooling fiber. A high efficiency, single mode Tm-doped fiber laser has been built to pump a Tm-doped fiber cooler. The cooling experiments done in a vacuum chamber show indications that cooling has occurred in the fiber. A theoretical framework to understand the nature of cooling in this laser cooling system has been developed which highlights the cooling power available as a function of various material and fiber parameters including background loss and absorption saturation effects in the cooling fiber. Cooling characteristics, with special emphasis on the fiber's saturation behavior, have been studied using theoretical models of Tm3+-doped glass (4-level models) and Tm3+ doped KLa(WO4)2 crystals (20-level model).

Paper Details

Date Published: 8 February 2011
PDF: 11 pages
Proc. SPIE 7951, Laser Refrigeration of Solids IV, 795109 (8 February 2011); doi: 10.1117/12.876225
Show Author Affiliations
Dan T. Nguyen, NP Photonics (United States)
Christopher Shanor, College of Optical Sciences, The Univ. of Arizona (United States)
Jie Zong, NP Photonics (United States)
Wenyan Tian, NP Photonics (United States)
Zhidong Yao, NP Photonics (United States)
Jianfeng Wu, NP Photonics (United States)
Jeff Weiss, College of Optical Sciences, The Univ. of Arizona (United States)
Rolf Binder, College of Optical Sciences, The Univ. of Arizona (United States)
The Univ. of Arizona (United States)
Arturo Chavez-Pirson, NP Photonics (United States)

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

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