We have analyzed the relation between the conversion efficiency of CLBO crystal for fourth-harmonic generation of Nd:YAG laser and the effect of frequency-conversion parameters such as peak intensity, crystal length, and so on. We have found that the conversion efficiency of CLBO crystal is interrelated with the product of input average intensity and crystal length. It has been theoretically confirmed for the first time that this interrelation is caused by the thermal dephasing. By use of this theoretical examination, we have generated 20.5-W UV output power by fourth-harmonic generation of Nd:YAG laser in a CLBO crystal. This value is, to our knowledge, the highest UV power generated in all-solid-state lasers.
J-STAGEがリニューアルされました! https://www.jstage.jst.go.jp/browse/-char/ja/
