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理论研究了650nm激光雪崩抽运Tm3+/Yb3+共掺激光晶体的本征光学双稳态.基于系统的非线性耦合速率方程理论,数值分析了Tm3+/Yb3+离子能级布居数的本征光学双稳性、系统参数对光学双稳态的影响和双稳迟滞回线的动态变化.数值结果给出了光子雪崩机制下Tm3+/Yb3+共掺激光晶体的可见与红外光谱发光的本征光学双稳态;指出了通过优化Tm3+/Yb3+离子浓度比,选取低声子能晶体基质和采用晶体冷却技术,以及调谐抽运光与Tm3+离子激发态跃迁能隙满足共振频率匹配,可以有效地增强本征光学双稳效应;通过微调谐抽运光波长和控制抽运光强变化速率,可以实现动态调控的本征光学双稳态. 相似文献
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Intrinsic Bistability and Critical Slowing in Tm^3+/Yb^3+ Codoped Laser Crystal with the Photon Avalanche Mechanism 下载免费PDF全文
We present theoretically a novel intrinsic optical bistability (IOB) in the Tm^3+ /Yb^3+ codoped system with a photon avalanche mechanism. Numerical simulations based on the rate equation model demonstrate distinct 10B hysteresis and critical slowing dynamics around the avalanche thresholds. Such an 10B characteristic in Tm^3+ /Yb^3+ eodoped crystal has potential applications in solid-state bistable optical displays and luminescence switchers in visible-infrared spectra. 相似文献
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本文提出了一种新的符号替换光学处理方法.采用互补编码和地点寻址的真值表查询,构造了一种可进行返回运算的全加数字处理器.利用由液晶光阀构成的行逻辑器件对这一符号替换系统进行了实验验证并给出了实验结果. 相似文献
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光学双稳性的静态稳定度和光强稳定器 总被引:8,自引:2,他引:6
本文讨论了光学双稳态光强稳定器特性的物理量——静态稳定度S.据此分析了几种光学双稳态器件在稳态条件下输出光强的稳定性.指出对这种稳定性而言多光束干涉器件优于双光束干涉器件;非线性反馈优于线性反馈,尤以指数反馈为佳.本文还报道了具有指数反馈的电光混合光学双稳态光强稳定器的实验结果,获得了S(?)50的较高稳定度.实验结果与理论计算结果相符. 相似文献
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Large Bandwidth Optical Limiting by Kerr Medium Doped One-Dimensional Coupled Cavity Optical Waveguides 总被引:2,自引:0,他引:2 下载免费PDF全文
We present a new method to realize large bandwidth optical limiting using Kerr nonlinearity doped one-dimensional coupled cavity optical waveguides (CCOWs). When the incident intensity is weak, the structure is a perfect CCOW that supports a high transmission band. When the intensity is increased, the Kerr effects change the refractive index of the Kerr cavity which results in a large decrease of transmission coefficients in the whole band. We numerically analyse the limiter using the nonlinear transfer matrix method and nonlinear finite difference in time domain method. Optical limiting effects are observed in the whole transmission band, and optimization methods are also discussed. 相似文献
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