摘要
发展了一种新型相位共轭干涉法可用于简单方便地测定介质三次非线性极化率（χ（３））的相位。文中用这种方法研究了二种染料掺杂高分子膜χ（３）的相位，发现由饱和吸收效应产生的χ（３）的相位，当波长远离吸收峰时，由─π／２趋于─π，而由光到漂白效应产生的χ（３）的相位都落在─１７／１８π附近。
An improved method involving three optical phase conjugators for measuring the phase of complex third-order nonlinear susceptibility (χ(3) ) directly has been developed. The χ(3)'s phases of two saturable absorption dye-doped polymers, i. e.,Eosin Y/polyvinyl alcohol (Eo/PVA ) and Erythrosin B/polyvinyl acohol (Er/PVA)have been measured by using this method. We found that their χ(3)'s phases originating from saturable absorption effect has a tendency approaching to - π from -π/2 as the wavelength used goes far away from the absorption peak. Otherwise, χ(3)'s phase originating from dye-bleached effect was about-17/18π.
出处
《光学学报》
CSCD
北大核心
1995年第6期653-657,共5页
Acta Optica Sinica
关键词
相位共轭干涉
饱和吸收
极化率
染料掺杂
optical phase conjugate interferometer
saturable absorption
third-order nonlinear susceptibility
dye-dope polymer.
