CS_2宽带光限幅和非线性吸收特性研究

Broadband Optical Limiting and Nonlinear Optical Absorption Properties of Carbon Disulfide

利用ns脉冲激光，研究了CS2在420-470nm波长范围内的非线性吸收和光限幅特性。实验结果表明，CS2对420-450nm波长的脉冲激光具有大的非线性吸收和优良的光限幅性能，随着波长的增加，其非线性吸收和光限幅性能逐渐减小；CS2良好的宽带光限幅性能源于其大的非线性吸收，其非线性吸收机制为双光子吸收（TPA）以及由TPA诱导的激发态吸收（ESA）。

The nonlinear absorption and optical limiting properties of CS2 were studied in the wavelength region of 420-470 nm with nanosecond pulses. Resuls show that CS2 has large nonlinear absorption and good optical lim/ting properties in the wavelength of 420-450 nm. With the increasing of wavelength,the nonlinear absorption and optical limiting effect of CS2 decrease gradually. This strong and broadband optical limiting performance can be attributed to its large nonlinear absorption with combination of two-photon absorption（TPA） and the excited state absorption（ESA） induced by TPA.