Nonlinear optical response in alkali-silicate glasses at 800 nm femtosecond irradiations
Nonlinear optical response in alkali-silicate glasses at 800 nm femtosecond irradiations
复制标题
800 nm 飞秒辐照下碱硅酸盐玻璃的非线性光学响应
DOI：
10.1016/j.optcom.2004.10.077
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发表时间：
2005
影响因子：
2.4
通讯作者：
H. Hoffmann
中科院分区：
文献类型：
--
作者：
K. J. Ghaleh;N. Mansour;D. Ashkenasi;H. Hoffmann
用透射率测量方法研究了聚焦200飞秒脉冲激光辐照下三种碱硅酸盐玻璃的非线性光学响应。所研究的玻璃分别为na20 - cao - sio2、k20 - cao - sio2和cs20 - cao - sio2。当入射脉冲能量在35 μJ以上时，cs20 - cao - sio2样品，na20 - cao - sio2样品，60 μJ以上，k20 - cao - sio2样品，均观察到非线性传输。飞秒非线性透过率测量用于模拟所测碱硅酸盐玻璃的非线性行为。三光子吸收和三光子产生的自由载流子是引起非线性响应的主要机制。报道了所测碱硅酸盐玻璃的三光子吸收系数和光生自由载流子截面的值。
Nonlinear optical response of three alkali-silicate glasses by irradiation of a focused 200 femtosecond pulsed laser were investigated using transmittance measurement at 800 nm. The studied glasses are Na2O–CaO–SiO2, K2O–CaO–SiO2and Cs2O–CaO–SiO2. The nonlinear transmissions are observed for incident pulse energies of above 35 μJ for Cs2O–CaO–SiO2sample, 60 μJ for Na2O–CaO–SiO2sample and 70 μJ for K2O–CaO–SiO2sample. Femtosecond nonlinear transmittance measurements were used to model the nonlinear behavior of the tested alkali-silicate glasses. The three-photon absorption along with three-photon generated free-carriers within the glasses is main mechanism for the observed nonlinear response. The values of three-photon absorption coefficient and photo-generated free-carrier cross-section are reported for the tested alkali-silicate glasses.