Energy transfer and lasing in LiYbF4:Ho, LiYbF4:Ho,Tm, and KYb(WO4)3 crystals

Alexander V. Sandulenko; V. A. Sandulenko; Alexandra M. Tkachuk; Alexandre N. Titov; V. M. Reiterov; V. N. Ivanov

doi:10.1117/12.334775

29 December 1998 Energy transfer and lasing in LiYbF₄:Ho, LiYbF₄:Ho,Tm, and KYb(WO₄)₃ crystals

Alexander V. Sandulenko, V. A. Sandulenko, Alexandra M. Tkachuk, Alexandre N. Titov, V. M. Reiterov, V. N. Ivanov

Proceedings Volume 3682, Laser Optics '98: Solid State Lasers; (1998) https://doi.org/10.1117/12.334775
Event: Laser Optics '98, 1998, St. Petersburg, Russian Federation

Abstract

We have studied both theoretically and experimentally the energy transfer processes in YbLiF₄:Ho³⁺ (0.4%) and YbLiF₄:Ho³⁺ (0.4%),Tm³⁺ (10%) crystals and in the series of crystals KYb(WO₄)₂:Tm³⁺,Ho³⁺ (0.4%) with the thulium concentration 5; 10; and 20%. The population kinetics of the ⁵I₇ holmium level was studied under the 1.047 micrometers Q-switched YLF:Nd³⁺ laser pumping. The efficiency of energy transfer processes in Ho³⁺ doped crystals, codoped with Yb³⁺ and Tm³⁺, was demonstrated. With an YbLiF4:Ho³⁺ (0.4%) laser rod we have obtained lasing at 2.06 micrometers with the total efficiency of 4.8% and the slope efficiency of 11%. In the KYb(WO₄)₂:Tm³⁺ (10%),Ho³⁺ (0.4%) crystal, lasing was obtained for the first time at 2 micrometers . The pumping threshold being approximately 150 mJ, total efficiency 6% and slope efficiency 9.7% was achieved.

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Alexander V. Sandulenko, V. A. Sandulenko, Alexandra M. Tkachuk, Alexandre N. Titov, V. M. Reiterov, and V. N. Ivanov "Energy transfer and lasing in LiYbF₄:Ho, LiYbF₄:Ho,Tm, and KYb(WO₄)₃ crystals", Proc. SPIE 3682, Laser Optics '98: Solid State Lasers, (29 December 1998); https://doi.org/10.1117/12.334775

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