Wang Yitao, Lancry Matthieu, Cavillon Maxime, Poumellec Bertrand
Opt Lett. 2022 Mar 1;47(5):1242-1245. doi: 10.1364/OL.449486.
This paper is dedicated to the lifetime prediction of Type II modifications (i.e., nanogratings) written in silica glass using an infrared femtosecond laser. Herein we report accelerated aging experiments of such nanogratings through the monitoring of their characteristic linear birefringence signature. Based on the master curve formalism, we demonstrate that these laser-induced nanostructures can survive for 200 hours at 1100°C. Under the reported processing conditions and after a dedicated passivation treatment, the estimated lifetime of the birefringent optical elements is beyond 10 years at 800°C with a minor erasure of 7%.
本文致力于使用红外飞秒激光写入石英玻璃中的II型改性（即纳米光栅）的寿命预测。在此，我们通过监测其特征线性双折射特征来报告此类纳米光栅的加速老化实验。基于主曲线形式，我们证明这些激光诱导的纳米结构在1100°C下可以存活200小时。在所报道的加工条件下并经过专门的钝化处理后，双折射光学元件在800°C下的估计寿命超过10年，且仅有7%的轻微擦除。
