Lasing parameters and wavelength tunability of a new disordered solid-state active medium, Tm³⁺-doped gadolinium gallium aluminum garnet (Tm³⁺-doped , Tm:GGAG), were investigated. Five samples with thulium concentration ranging from 1.4 at.% to 9.2 at.% (Tm/Gd) were designed, grown and investigated. Basic spectroscopic characterization and measurement of a refractive index were performed. Each sample was tested as an active medium of a 2 m laser, longitudinally diode-pumped at 786 nm. Tm³⁺ concentration dependence of laser parameters was investigated. The highest slope efficiency of 43% w.r.t. absorbed power in the pulsed regime and 35% in the CW regime was achieved with the 2.4 at.% (Tm/Gd) sample. All samples produced beams of good quality with estimated M. Concentration-dependent tunability was investigated and a smooth continuous range of wavelengths, up to 187 nm wide, was recorded.

研究了一种新型无序固态活性介质 Tm ³⁺掺杂钆镓铝石榴石（Tm ³⁺掺杂，Tm:GGAG）的激光参数和波长可调性。设计、生长和研究了五个铥浓度范围从 1.4 at.% 到 9.2 at.% (Tm/Gd) 的样品。进行了基本的光谱表征和折射率的测量。每个样品都作为 2 m 激光的活性介质进行测试，纵向二极管泵浦波长为 786 nm。TM ³⁺研究了激光参数的浓度依赖性。使用 2.4 at.% (Tm/Gd) 样品实现了脉冲状态下 43% wrt 吸收功率和 CW 状态下 35% 的最高斜率效率。所有样本都产生了具有估计 M 的高质量光束。研究了浓度相关的可调性，并记录了平滑连续的波长范围，宽达 187 nm。