Solid-state laser chip based on a KGd(WO4)2:Nd3+ crystal with semiconductor end pumping and passive Q-switching, lasing at wavelength 1.35 μm

Иванов П.С., Мочалов И.В., Сандуленко А.В. Твердотельный чип-лазер на кристалле KGd(WO4)2:Nd3+ с торцевой полупроводниковой накачкой и пассивной модуляцией добротности, генерирующий на длине волны 1,35 мкм // Оптический журнал. 2015. Т. 82. № 12. С. 14–17.

Ivanov P.S., Mochalov I.V., Sandulenko A.V. Solid-state laser chip based on a KGd(WO4)2:Nd3+ crystal with semiconductor end pumping and passive Q-switching, lasing at wavelength 1.35 μm [in Russian] // Opticheskii Zhurnal. 2015. V. 82. № 12. P. 14–17.

P. S. Ivanov, I. V. Mochalov, and A. V. Sandulenko, "Solid-state laser chip based on a KGd(WO₄)₂:Nd³⁺ crystal with semiconductor end pumping and passive Q-switching, lasing at wavelength 1.35 μm," Journal of Optical Technology. 82(12), 789-791 (2015). https://doi.org/10.1364/JOT.82.000789

We studied a miniature laser source with an end-fed semiconductor pump in pulsed-periodic and cw mode; the pump had an active element that consisted of a KGd(WO₄)₂:Nd³⁺ crystal lasing at wavelength 1.35 μm. The laser power was studied as a function of pump-pulse width. It was shown that the output power from a chip laser of this type is capable of reaching 0.25 W in pulse-periodic mode with a pump power of 1.9 W, and 0.06 W in Q-switched mode at a pump power of 1.9 W. The effect of optical cavity length on the width of the lasing pulse from the laser was also studied. The behavior of a laser in which the cavity consisted of only two elements—a KGd(WO₄)₂:Nd³⁺ active element with a backstop mirror deposited on one end, and a YAG:V³⁺ passive laser gate with an exit mirror deposited on one end. The cavity in this two-element laser chip was 5 mm long. It was shown that such a laser chip can have a laser-pulse width of 7 ns or less.

This work was financially supported by the Russian Federation Ministry of Education and Science (Scientific Research and Development Program Identifier: RFMEFI58114X0006).