光学技术, 2017, 43 (5): 434, 网络出版: 2017-11-07  

白光和激光产生的调制不稳定性的比较

Comparison of the modulation instability induced by the white light and the laser
林蓉 *
作者单位
菏泽学院 物理与电子工程系, 山东 菏泽 274015
摘要
在非线性自散焦LiNbO3∶Fe晶体中, 实验观察了用激光作光源和用白光作光源两种情况下所产生的调制不稳定性, 并从三个方面对这两种情况进行了比较。实验结果表明: 在两种情况下, 达到稳定状态前, MI现象都会随辐照时间的增加而变得越来越清晰, 并且MI图样都会随着入射光束形状的变化而变化。不同的是, 用白光作光源时, 灯丝长度方向与晶体c轴方向的夹角大于等于45°时出现MI, 而用激光作光源时, 入射光束方向与c轴方向的夹角不大于45°才出现MI。
Abstract
The modulation instability caused by laser light source and white light source is respectively observed experimentally in nonlinear self-defocusing LiNbO3∶Fe crystal. And some comparisons are made from three aspects. Experimental results show that in the two cases, MI phenomenon becomes more and clearer with the increase of irradiation time before reaching the steady state, and MI pattern changes with the shape of the incident beam. When the white light is used as the light source, MI begins to appear when the angle between filament direction and the crystal c axis is great than or equal to 45°; when the laser is used as light source, MI begins to appear when the angle between the direction of the incident beam and the c axis is not greater than 45°.

林蓉. 白光和激光产生的调制不稳定性的比较[J]. 光学技术, 2017, 43(5): 434. LIN Rong. Comparison of the modulation instability induced by the white light and the laser[J]. Optical Technique, 2017, 43(5): 434.

关于本站 Cookie 的使用提示

中国光学期刊网使用基于 cookie 的技术来更好地为您提供各项服务,点击此处了解我们的隐私策略。 如您需继续使用本网站,请您授权我们使用本地 cookie 来保存部分信息。
全站搜索
您最值得信赖的光电行业旗舰网络服务平台!