Eye-safe 1.5–1.6 μm pulse laser passively Q-switched by a Co²⁺:MgAl₂O₄ crystal was realized in a Z-cut, 1.8 mm-thick Er:Yb:Sr₃Gd₂(BO₃)₄ crystal end-pumped by a 935 nm laser diode. A 1534 nm pulse laser with energy of 9.1 μJ, repetition frequency of 15.6 kHz, and duration of 29 ns was obtained at an absorbed pump power of 2.5 W. Polarization of the output laser beam was measured to be linear and parallel to the Y optical indicatrix axis. Benefited from a broad and flat absorption band between 920 and 950 nm, the Er:Yb:Sr₃Gd₂(BO₃)₄ crystal may be a good gain medium for 1.5–1.6 μm laser pumped by a common commercial diode laser around 940 nm.

在Z切割，厚度为1.8 mm的Er：Yb：Sr ₃ Gd ₂（BO ₃）₄晶体中实现对眼睛安全的Co ²⁺：MgAl ₂ O ₄晶体进行Q切换的1.5-1.6μm脉冲激光由935 nm激光二极管进行末端泵浦。在2.5 W的吸收泵浦功率下，获得了能量为9.1μJ，重复频率为15.6 kHz，持续时间为29 ns的1534 nm脉冲激光器。测得输出激光束的偏振是线性的，并且平行于Y光学tri轴。Er：Yb：Sr ₃ Gd ₂（BO₃）对于在940 nm左右的普通商用二极管激光器泵浦的1.5–1.6μm激光器，₄晶体可能是很好的增益介质。