Room-temperature 1.643-µm Er(3+):Y(3)Sc(2)Ga(3)O(12) (Er:YSGG) laser.

Laser operation at 1.643 µm ((4)I(13/2)-(4)I(15/2)) in Er(3+):Y(3)Sc(2)Ga(3)O(12) (Er:YSGG) at 300 K is reported. An Er:glass laser (1.

Co(2+):YSGG saturable absorber Q switch for infrared erbium lasers.

Passive Q switching of Er:glass (1.53 microm) with a new, robust, solid-state saturable absorber, Co(2+):Y(3)Sc(2)Ga(3)O(12), has been demonstrated. Q-switched pulses of 20 ns and 4 mJ of energy were obtained.

Spectroscopic properties of Cr(4+):Lu(3)Al(5)O(12).

We report on the near-infrared absorption, emission, and lifetime data of Cr(4+):Lu(3)Al(5)O(12) (Cr:LAG) and compare the results with the known laser material Cr(4+)-doped Y(3)Al(5)O(12) (Cr:YAG). Lu(3)Al(5)O(12) has a smaller unit cell than Y(3)Al(5)O(12), and this feature is reflected in its spectroscopic properties. The low-temperature luminescence spectrum is shifted by 85 cm(-1) to higher energy compared with Cr:YAG.