Materials for high-power second-harmonic generation

Temperature dependence of angular noncritical phase-matched second-harmonic generation of focused laser radiation

“…This leads to an asymmetric dependence of the conversion efficiency on temperature, η(T ), and to an increase in the temperature width [2]. An experimentally asymmetric dependence η(T ) was obtained by converting a frequency with angular critical and angular noncritical phase-matching (ANCPM) in different crystals [2][3][4][5][6][7][8][9][10][11][12]. For example, Magni et al [10] observed a significant asymmetry of the dependence η(T ) and an increase in the temperature width from 2.8°С to 9.5°С for intracavity second-harmonic generation (SHG) of radiation at λ = 1.047 µm in lithium triborate (LBO) crystal.…”

“…For example, Magni et al [10] observed a significant asymmetry of the dependence η(T ) and an increase in the temperature width from 2.8°С to 9.5°С for intracavity second-harmonic generation (SHG) of radiation at λ = 1.047 µm in lithium triborate (LBO) crystal. Moreover, the authors of [3][4][5][6][7][8][9][10][11][12] explain the asymmetry of the dependence η(T ) as due to thermal self-action.…”