Liu Jingjing, Liu Jie, Guo Zhinan, Zhang Han, Ma Weiwei, Wang Jingya, Su Liangbi
Opt Express. 2016 Dec 26;24(26):30289-30295. doi: 10.1364/OE.24.030289.
An efficient Er:SrF crystal, lightly Er-doped to a concentration of 4at.%, was successfully grown by the traditional Bridgman method and displayed excellent spectral properties. A diode-end-pumped passively Q-switched dual-wavelength laser, operating at 2.79 μm wavelength, was demonstrated with this crystal by using black phosphorus as the saturable absorber (BP-SA). In the compact passively Q-switched Er:SrF laser, the maximum average output power of 180 mW was achieved at an absorbed pump power of 2.47 W, with a pulse duration of 702 ns and a repetition rate of 77.03 kHz. To the best of our knowledge, this is the first reported application of BP-SA to dual-wavelength pulse laser operation in the mid-infrared region.
通过传统的布里奇曼法成功生长出一种高效的掺铒氟化锶（Er:SrF）晶体，铒的掺杂浓度为4原子百分比，该晶体表现出优异的光谱特性。利用黑磷作为可饱和吸收体（BP-SA），用这种晶体演示了一种在2.79μm波长下工作的二极管端面泵浦被动调Q双波长激光器。在紧凑型被动调Q Er:SrF激光器中，在吸收泵浦功率为2.47W时，实现了180mW的最大平均输出功率，脉冲持续时间为702ns，重复频率为77.03kHz。据我们所知，这是首次报道将BP-SA应用于中红外区域的双波长脉冲激光运行。
