Fernandez T Toney, Hernandez M, Sotillo B, Eaton S M, Jose G, Osellame R, Jha A, Fernandez P, Solis J
Opt Express. 2014 Jun 16;22(12):15298-304. doi: 10.1364/OE.22.015298.
We report on a strong cross migration of ions in a Tellurite (Te) based glass to form waveguides using a high repetition rate femtosecond laser. The tellurite glass matrix was modified using oxides of P, Na and Zn elements of which Te and Na ions play an important role to form waveguides upon laser irradiation. Tellurium was observed to migrate causing a positive index change zone whereas sodium cross migrates to the tellurium deficient zone forming a relatively low index change region. We have used micro-Raman analysis to scan across the waveguide cross-section to understand the state of the glass network and the relation between ion migration and glass densification for waveguiding. We have found that there is an increase in TeO3 units and reduction of TeO4 units in the Te rich zones enabling densification. This work will help guide the new commercial glass manufacturing industries that aim at producing mid-infrared transparent glasses like tellurite, tellurides and chalcogenides for the production of waveguide based devices.
我们报道了在基于碲酸盐（Te）的玻璃中，利用高重复率飞秒激光使离子发生强烈的交叉迁移以形成波导。碲酸盐玻璃基质用P、Na和Zn元素的氧化物进行了改性，其中Te和Na离子在激光辐照下对形成波导起着重要作用。观察到碲发生迁移，导致形成一个正折射率变化区，而钠交叉迁移到缺碲区，形成一个相对低折射率变化区域。我们使用显微拉曼分析对波导横截面进行扫描，以了解玻璃网络的状态以及离子迁移与用于波导的玻璃致密化之间的关系。我们发现，在富Te区，TeO3单元增加，TeO4单元减少，从而实现致密化。这项工作将有助于指导新的商业玻璃制造行业，这些行业旨在生产如碲酸盐、碲化物和硫族化物等中红外透明玻璃，用于制造基于波导的器件。
