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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 37, Iss. 9 — Mar. 20, 1998
  • pp: 1627–1634

Comparative Experimental Investigation of Thermal Loading in Continuous-Wave Cr4 +:Forsterite Lasers

Alphan Sennaroglu  »View Author Affiliations


Applied Optics, Vol. 37, Issue 9, pp. 1627-1634 (1998)
http://dx.doi.org/10.1364/AO.37.001627


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Abstract

Results of a detailed experimental study aimed at reducing the thermal loading effects in room-temperature continuous-wave Cr<sup>4+</sup>:forsterite lasers are presented. By using a Nd:YAG pump laser operated at 1.06 μm, the effect of the absorption coefficient and crystal cross-sectional area on the power performance of three crystals was compared between 12 and 36 °C. Experiments indicated that a low differential absorption coefficient significantly reduces the pump-induced thermal effects and cavity losses that would otherwise give rise to inefficient operation and increased temperature sensitivity. In particular, a Cr<sup>4+</sup>:forsterite crystal with an absorption coefficient of 0.57 cm<sup>−1</sup> yielded as much as 900 mW of output power at 1.26 μm and a crystal temperature of 15 °C with an incident pump power of only 7.6 W. To the author’s knowledge, the demonstrated slope efficiency of 30% represents the highest continuous-wave power performance reported to date from this laser system at elevated temperatures.

© 1998 Optical Society of America

OCIS Codes
(140.0140) Lasers and laser optics : Lasers and laser optics
(140.3460) Lasers and laser optics : Lasers
(140.6810) Lasers and laser optics : Thermal effects

Citation
Alphan Sennaroglu, "Comparative Experimental Investigation of Thermal Loading in Continuous-Wave Cr4 +:Forsterite Lasers," Appl. Opt. 37, 1627-1634 (1998)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-37-9-1627

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