Ultrafast laser writing of optical waveguides in ceramic Yb:YAG: a study of thermal and non-thermal regimes
Ultrafast laser writing of optical waveguides in ceramic Yb:YAG: a study of thermal and non-thermal regimes
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DOI：
10.1007/s00339-010-6135-9
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发表时间：
2011-07-01
影响因子：
2.7
通讯作者：
Jaque, D.
中科院分区：
文献类型：
--
作者：
Benayas, A.;Silva, W. F.;Jaque, D.
我们报告了通过调整热累积效应的存在来改进 Yb:YAG 陶瓷中的超快激光写入光波导。通过镱微发光和微拉曼结构分析的结合，获得了晶格缺陷和应力场的图。我们展示了激光退火如何能够大幅降低缺陷浓度并降低压应力，从而有效减少 50% 的传播损耗，并实现更扩展和对称的传播模式。
We report the improvement of ultrafast laser written optical waveguides in Yb:YAG ceramics by tailoring the presence of heat accumulation effects. From a combination of ytterbium micro-luminescence and micro-Raman structural analysis, maps of lattice defects and stress fields have been obtained. We show how laser annealing can strongly reduce the concentration of defects and also reduce compressive stress, leading to an effective 50% reduction in the propagation losses and to more extended and symmetric propagation modes.