Theoretical modeling and experiments on a DBR waveguide laser fabricated by the femtosecond laser direct-write technique.
Theoretical modeling and experiments on a DBR waveguide laser fabricated by the femtosecond laser direct-write technique.
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飞秒激光直写技术制造的DBR波导激光器的理论建模和实验。
DOI：
10.1364/oe.21.017701
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发表时间：
2013
期刊：
影响因子：
3.8
通讯作者：
M. Withford
中科院分区：
文献类型：
--
作者：
Y. Duan;A. Mckay;N. Jovanovic;M. Ams;G. Marshall;M. J. Steel;M. Withford
本文提出了一种利用飞秒激光直写技术在磷酸盐玻璃中制作掺镱分布布拉格反射器（DBR）波导激光器的模型。该模型强调横向积分，以研究均匀掺杂玻璃中的能量分布，这是飞秒激光刻写波导激光器（WGL）的一个重要特征。通过DBR WGL激光器和光纤激光器的对比实验验证了模型的正确性，并研究了分布稀土掺杂对DBR WGL激光器性能的影响。大约15%的泵浦功率被吸收的掺杂的“包层”在飞秒激光刻写的Yb掺杂的WGL的情况下，长度为9.8毫米。最后，我们使用该模型来确定优化激光输出的参数，如波导长度，输出耦合器的反射率和折射率对比度。
We present a model for a Yb-doped distributed Bragg reflector (DBR) waveguide laser fabricated in phosphate glass using the femtosecond laser direct-write technique. The model gives emphasis to transverse integrals to investigate the energy distribution in a homogenously doped glass, which is an important feature of femtosecond laser inscribed waveguide lasers (WGLs). The model was validated with experiments comparing a DBR WGL and a fiber laser, and then used to study the influence of distributed rare earth dopants on the performance of such lasers. Approximately 15% of the pump power was absorbed by the doped "cladding" in the femtosecond laser inscribed Yb doped WGL case with the length of 9.8 mm. Finally, we used the model to determine the parameters that optimize the laser output such as the waveguide length, output coupler reflectivity and refractive index contrast.