摘要
实验研究了近红外飞秒激光脉冲诱导重钡火石玻璃产生的色心、紫外透明和折射率变化 ,测量了样品在激光辐照前后的吸收光谱和折射率的变化 实验发现色心的产生伴随着折射率的改变 ,但色心漂白后 ,折射率的改变依然存在 ,表明色心与折射率改变的热稳定性不一致 ,意味着飞秒激光脉冲诱导玻璃折射率变化的机理与色心产生的机理不同 实验还观察到色心区域在紫外产生透明 ;色心漂白后 ,紫外透明消失的现象 。
The color center is generated in ZBaF15 optical glass by near infrared femtosecond laser pulse coming from Ti:sapphire regenerative amplifier, and is bleached after annealing of the sample about 200℃. The absorption spectrum and refractive index change are measured at above processes, they show a obvious different thermal stabilities between color center and the induced refractive index change, suggesting the mechanism of refractive index change induced by femtosecond laser pulse is different from that of the generation of color center. The 10% transmission in ultra violet region is observed in the color center region, and involving mechanism and potential application are discussed too.
出处
《光子学报》
EI
CAS
CSCD
北大核心
2004年第4期412-415,共4页
Acta Photonica Sinica
基金
国家自然科学基金(批准号 :No .6 0 0 780 0 4 )
中国科学院创新基金 (批准号 :4 0 0 0 10 4 3)资助项目
关键词
飞秒激光脉冲
玻璃
色心
折射率
Femtosecond laser pulse
Glass
Color center
Refractive index
