Abstract
We have studied both theoretically and experimentally the energy transfer processes in YbLiF<SUB>4</SUB>:Ho<SUP>3+</SUP> (0.4%) and YbLiF<SUB>4</SUB>:Ho<SUP>3+</SUP> (0.4%),Tm<SUP>3+</SUP> (10%) crystals and in the series of crystals KYb(WO<SUB>4</SUB>)<SUB>2</SUB>:Tm<SUP>3+</SUP>,Ho<SUP>3+</SUP> (0.4%) with the thulium concentration 5; 10; and 20%. The population kinetics of the <SUP>5</SUP>I<SUB>7</SUB> holmium level was studied under the 1.047 micrometers Q-switched YLF:Nd<SUP>3+</SUP> laser pumping. The efficiency of energy transfer processes in Ho<SUP>3+</SUP> doped crystals, codoped with Yb<SUP>3+</SUP> and Tm<SUP>3+</SUP>, was demonstrated. With an YbLiF4:Ho<SUP>3+</SUP> (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(WO<SUB>4</SUB>)<SUB>2</SUB>:Tm<SUP>3+</SUP> (10%),Ho<SUP>3+</SUP> (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.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
