Lasers, Fiber Optics, and Communications

Enhancement of pump efficiency of thin disk lasers by compensation of directional image extension on pumping spot

[+] Author Affiliations
Sasan Seyed Zamani

Iran University of Science and Technology, Department of Physics, Narmak, Tehran 16846-13114, Iran

Iranian National Center for Laser Science and Technology (INLC), P. O. Box 14665-576, Tehran, Iran

Esmaeil Eslami

Iran University of Science and Technology, Department of Physics, Narmak, Tehran 16846-13114, Iran

Opt. Eng. 55(3), 036104 (Mar 08, 2016). doi:10.1117/1.OE.55.3.036104
History: Received December 7, 2015; Accepted February 8, 2016
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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.

© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Sasan Seyed Zamani and Esmaeil Eslami
"Enhancement of pump efficiency of thin disk lasers by compensation of directional image extension on pumping spot", Opt. Eng. 55(3), 036104 (Mar 08, 2016). ; http://dx.doi.org/10.1117/1.OE.55.3.036104


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