Anisotropy in spectroscopic and laser properties of Yb:Sr_3La_2(BO_3)_4 disordered crystal
Anisotropy in spectroscopic and laser properties of Yb:Sr_3La_2(BO_3)_4 disordered crystal
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DOI：
10.1364/ome.7.003251
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发表时间：
2017-09
影响因子：
2.8
通讯作者：
Hualei Yuan;Lisha Wang;Y. Ma;Xiaodan Dou;W. Han;Honghao Xu;Junhai Liu;Z. Pan
中科院分区：
文献类型：
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作者：
Hualei Yuan;Lisha Wang;Y. Ma;Xiaodan Dou;W. Han;Honghao Xu;Junhai Liu;Z. Pan
本文首次报道了Yb:Sr3La2(BO3)4无序晶体的极化吸收、发射光谱和有效激光作用。在平行于晶体b轴偏振方向的977 nm处，吸收和发射的峰值分别为1.95 × 10−20和2.45 × 10−20 cm2。用976 nm二极管激光器纵向泵浦a-、b-和c-切割晶体样品，证明了有效的连续波激光作用，产生高达8.2 W的输出功率，相对于入射泵浦功率，光对光效率为32%。根据所使用的输出耦合，在一定泵浦电平下，激光作用可以从单偏振振荡过渡到双正交偏振振荡。
We report, for the first time to our knowledge, on the polarized absorption and emission spectra and efficient laser action of the Yb:Sr3La2(BO3)4 disordered crystal. The strongest absorption and emission occur at about 977 nm for polarization direction parallel to the crystallographic b axis, with the peak absorption and emission cross-sections amounting, respectively, to 1.95 × 10−20 and 2.45 × 10−20 cm2. Efficient continuous-wave laser action is demonstrated with a-, b-, and c-cut crystal samples longitudinally pumped by a 976-nm diode laser, producing an output power of up to 8.2 W with an optical-to-optical efficiency of 32% with respect to incident pump power. Depending on the output coupling utilized, the laser action could exhibit a transition from single-polarization oscillation to dual-orthogonal-polarization oscillation at a certain pump level.