Investigating a thermal lens in a Tm:YLF crystal under intense diode pumping

Еремейкин О.Н., Егоров Н.А., Захаров Н.Г., Савикин А.П., Шарков В.В. Исследование тепловой линзы в кристалле Tm:YLF при интенсивной диодной накачке // Оптический журнал. 2009. Т. 76. № 11. С. 5–9.

Eremeikin O.N., Egorov N.A., Zakharov N.G., Savikin A.P., Sharkov V.V. Investigating a thermal lens in a Tm:YLF crystal under intense diode pumping [in Russian] // Opticheskii Zhurnal. 2009. V. 76. № 11. P. 5–9.

O. N. Eremeĭkin, N. A. Egorov, N. G. Zakharov, A. P. Savikin, and V. V. Sharkov, "Investigating a thermal lens in a Tm:YLF crystal under intense diode pumping," Journal of Optical Technology. 76 (11), 676-679 (2009). https://doi.org/10.1364/JOT.76.000676

This paper presents experimental studies of a thermal lens induced in a Tm:YLF crystal under the action of continuous longitudinal pumping by a linear array of diode lasers. A technique is described for measuring the parameters of the thermal lens. It is found that a weak positive lens is formed in a Tm:YLF crystal in the plane of the principal optic axis of the crystal, with its focal power weakly depending on the pump power, while a negative lens that strongly depends on the pump power is formed in a plane perpendicular to the crystal's optic axis.

The research was supported by the Grant of the President of RF (grant No. НШ-2786.2008.2).