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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 15, Iss. 19 — Sep. 17, 2007
  • pp: 11903–11912

Computational model for operation of 2 µm co-doped Tm,Ho solid state lasers

Oleg A. Louchev, Yoshiharu Urata, Norihito Saito, and Satoshi Wada  »View Author Affiliations


Optics Express, Vol. 15, Issue 19, pp. 11903-11912 (2007)
http://dx.doi.org/10.1364/OE.15.011903


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Abstract

A computational model for operation of co-doped Tm,Ho solid-state lasers is developed coupling (i) 8-level rate equations with (ii) TEM00 laser beam distribution, and (iii) complex heat dissipation model. Simulations done for Q-switched ≈0.1 J giant pulse generation by Tm,Ho:YLF laser show that ≈43 % of the 785 nm light diode side-pumped energy is directly transformed into the heat inside the crystal, whereas ≈45 % is the spontaneously emitted radiation from 3F4, 5I7, 3H4 and 3H5 levels. In water-cooled operation this radiation is absorbed inside the thermal boundary layer where the heat transfer is dominated by heat conduction. In high-power operation the resulting temperature increase is shown to lead to (i) significant decrease in giant pulse energy and (ii) thermal lensing.

© 2007 Optical Society of America

OCIS Codes
(140.3480) Lasers and laser optics : Lasers, diode-pumped
(140.3540) Lasers and laser optics : Lasers, Q-switched
(140.3580) Lasers and laser optics : Lasers, solid-state

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: May 2, 2007
Revised Manuscript: July 26, 2007
Manuscript Accepted: July 26, 2007
Published: September 5, 2007

Citation
Oleg A. Louchev, Yoshiharu Urata, Norihito Saito, and Satoshi Wada, "Computational model for operation of 2 μm co-doped Tm,Ho solid state lasers," Opt. Express 15, 11903-11912 (2007)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-15-19-11903


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