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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 38, Iss. 15 — May. 20, 1999
  • pp: 3334–3337

Continuous-wave power transmission and thermal lensing of a saturable absorber subject to excited-state absorption

Alphan Sennaroglu  »View Author Affiliations


Applied Optics, Vol. 38, Issue 15, pp. 3334-3337 (1999)
http://dx.doi.org/10.1364/AO.38.003334


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Abstract

Rate-equation analysis has been used in an investigation of the role of saturation and excited-state absorption in the power transmission characteristics and thermal lensing of an absorber. Use of an iterative approach gives explicit analytical results for power transmission and thermal focal length in the presence of excited-state absorption. Sample calculations indicate that pump absorption can increase or decrease with increasing incident pump power, depending on the relative strength of the excited-state absorption cross section with respect to the ground-state absorption cross section. In the case of thermal lensing, results further indicate that saturation and excited-state absorption act as two competing effects, the former reducing the strength of the thermal lens and the latter causing the opposite effect. The analytical formulas derived in this analysis should prove useful to experimentalists in determination of ground-state and excited-state absorption cross sections from experimental power transmission and lensing data.

© 1999 Optical Society of America

OCIS Codes
(140.3580) Lasers and laser optics : Lasers, solid-state
(140.6810) Lasers and laser optics : Thermal effects
(160.6990) Materials : Transition-metal-doped materials

History
Original Manuscript: November 9, 1998
Revised Manuscript: March 1, 1999
Published: May 20, 1999

Citation
Alphan Sennaroglu, "Continuous-wave power transmission and thermal lensing of a saturable absorber subject to excited-state absorption," Appl. Opt. 38, 3334-3337 (1999)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-38-15-3334

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