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Optical Engineering

Enhancement of pump efficiency of thin disk lasers by compensation of directional image extension on pumping spot
Author(s): Sasan Seyed Zamani; Esmaeil Eslami
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Paper Abstract

The effect of directional image extension on the total pumping spot in thin disk lasers is reviewed. Three modified pumping setups that can compensate this effect and improve the absorption pumping area are presented, and the efficiency, advantages, and disadvantages of each modified configuration are discussed. Numerical comparison between absorption intensity profiles confirms an increment of maximum pump absorption density at the central region of the pumping area with respect to normal setup. Experimental investigation for the last modified pumping arrangement is in good agreement with simulation results. Measuring laser power output with a similar simple I-shaped resonator shows an enhancement of slope efficiency up to 2.5% together with a lower laser threshold for our modified setup.

Paper Details

Date Published: 8 March 2016
PDF: 11 pages
Opt. Eng. 55(3) 036104 doi: 10.1117/1.OE.55.3.036104
Published in: Optical Engineering Volume 55, Issue 3
Show Author Affiliations
Sasan Seyed Zamani, Iran Univ. of Science and Technology (Iran, Islamic Republic of)
Iranian National Ctr for Laser Science and Technology (Iran, Islamic Republic of)
Esmaeil Eslami, Iran Univ. of Science and Technology (Iran)

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