Nonlinear-optical interactions in fluorescein-doped boric acid glass.
Nonlinear-optical interactions in fluorescein-doped boric acid glass.
复制标题
荧光素掺杂硼酸玻璃中的非线性光学相互作用。
DOI：
10.1103/physreva.34.2026
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发表时间：
1986
期刊：
影响因子：
--
通讯作者：
Boyd
中科院分区：
文献类型：
--
作者：
Kramer;Tompkin;Boyd
掺黄绿素的硼酸玻璃是一种具有极低饱和强度（~ 15 mWcm）和大至~ 1 esu的非线性极化率g”'的材料。这种材料的饱和吸收的理论和实验表明，依赖于饱和光束的偏振态，即使不饱和吸收是偏振不敏感的。通过简并四波混频，在这种材料中获得了高达0.6%的相位共轭反射率。这些测得的反射率是在良好的协议与理论的预测，包括激发态吸收和光栅冲洗的影响。此外，由于饱和吸收的非线性，两光束耦合已被证明在这种材料。通过在两个光束之间引起-0.1Hz的频移来最大化耦合的幅度。
Fluorescein-doped boric acid glass is a material characterized by an extremely low saturation intensity of —15 mWcm and a nonlinear susceptibility g"' as large as —1 esu. The saturated absorption of this material is shown both theoretically and experimentally to depend on the state of polarization of the saturating beam, even though the unsaturated absorption is polarization insensitive. Phase-conjugate reflectivities as large as 0.6% have been obtained through use of degenerate fourwave mixing in this material. These measured reflectivities are in good agreement with the predictions of a theory that includes the effects of excited-state absorption and grating washout. In addition, two-beam coupling due to the nonlinearity of saturable absorption has been demonstrated in this material. The magnitude of the coupling is maximized by inducing a frequency shift between the two beams of -0.1 Hz.