Femtosecond measurement of third-order optical nonlinearities in Bi2O3-B2O3-BaO glasses

• 来源期刊: 中国光学快报(英文版)
• 学科: 物理学
• 关键词: 飞秒激光脉冲 三阶非线性 光学测量 眼镜 硫系玻璃 非线性测量 非线性折射 吸收系数
• 年，卷（期）: 2010,（1）
• 所属期刊栏目: Materials
• 页码范围: 70-73
• 页数: 4页
• 分类号: O437 TN24
• 语种: 英文

摘要

We present the measurement of the third-order nonlinearity of Bi_2O_3-B_2O_3-BaO glasses using the single Z-scan method with femtosecond laser pulses at 750-850 nm.Both third-order nonlinear refractionγand two photon absorption coefficient β are investigated.Theγshows an increasing tendency with increasing BaO content,and the largest value is estimated to be 7.2*10~(-14) cm~2/W,which is as large as those of chalcogenide glasses.The dependence ofβon the normalized photon energy is studied.