Nonlinear Refractive Index of Glasses and Crystals
Nonlinear Refractive Index of Glasses and Crystals
复制标题
DOI：
10.1117/12.7972266
复制
发表时间：
1978-10
影响因子：
1.3
通讯作者：
M. Weber;D. Milam;W. Smith
中科院分区：
文献类型：
--
作者：
M. Weber;D. Milam;W. Smith
强光束在介质中的传输会引起介质折射率的变化，从而引起高功率激光系统中的自聚焦和光束分裂。在简要讨论了折射率非线性的来源和空间各向异性的基础上，综述了非线性折射率系数的测量方法。详细描述了时间分辨干涉测量法的使用。用这种方法测量了光学玻璃和晶体在1064 nm处的非线性折射率。从这些数据中，给出了一个经验表达式，使用线性折射率和部分色散，提供了一个很好的估计在长波长限制的光学材料的非线性指数。
The propagation of intense optical beams through dielectric media induces changes in the refractive index which cause self-focusing and beam breakup in high-power laser systems. After a brief discussion of the origin and spatial anisotropy of refractive-index nonlinearities, methods for measuring the nonlinear refractive index coefficient are reviewed. The use of time-resolved interferometry is described in detail. Nonlinear indices for optical glasses and crystals measured at 1064 nm by this technique are tabulated. From these data, an empirical expression is given which, using the linear refractive index and partial dispersion, provides a good estimate of the nonlinear index of optical materials in the long-wavelength limit.