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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 19 — Sep. 10, 2012
  • pp: 21739–21748

Output characteristics of high power cryogenic Yb:YAG TRAM laser oscillator

Hiroaki Furuse, Junji Kawanaka, Noriaki Miyanaga, Haik Chosrowjan, Masayuki Fujita, Kenji Takeshita, and Yasukazu Izawa  »View Author Affiliations


Optics Express, Vol. 20, Issue 19, pp. 21739-21748 (2012)
http://dx.doi.org/10.1364/OE.20.021739


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Abstract

We analyzed the output power characteristics of a cryogenically cooled Yb:YAG total-reflection active-mirror (TRAM) laser oscillator including the temperature dependence of the emission cross section and the reabsorption loss of the Yb:YAG TRAM. A CW multi-transverse mode oscillation of a 9.8 at.% doped 0.6 mm thick Yb:YAG ceramic TRAM was investigated for various pump spot sizes and compared with theoretical results. The Yb:YAG temperatures were inferred from the ratio between fluorescence intensities at 1022 nm and 1027 nm which varied significantly with temperature below 200 K. Output power calculations using evaluated temperatures were in good agreement with the experimental data measured between 77 and 200 K, and the output power suppression due to the temperature rise observed above ~140 K. To the best of our knowledge, this is the first evaluation of output power for a cryogenically cooled Yb:YAG TRAM laser.

© 2012 OSA

OCIS Codes
(140.3480) Lasers and laser optics : Lasers, diode-pumped
(140.3580) Lasers and laser optics : Lasers, solid-state

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: July 17, 2012
Revised Manuscript: September 1, 2012
Manuscript Accepted: September 3, 2012
Published: September 6, 2012

Citation
Hiroaki Furuse, Junji Kawanaka, Noriaki Miyanaga, Haik Chosrowjan, Masayuki Fujita, Kenji Takeshita, and Yasukazu Izawa, "Output characteristics of high power cryogenic Yb:YAG TRAM laser oscillator," Opt. Express 20, 21739-21748 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-19-21739


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