【摘 要】
：
The third-order optical nonlinearities of dimethyl sulfoxide (DMSO) are investigated using the optical Kerr effect (OKE) and Z-scan techniques with femtosecond pulses. We are able to fit the OKE signal theoretically by convolving the autocorrelation of th
【出 处】
：
ChineseOpticsLetters
论文部分内容阅读
The third-order optical nonlinearities of dimethyl sulfoxide (DMSO) are investigated using the optical Kerr effect (OKE) and Z-scan techniques with femtosecond pulses. We are able to fit the OKE signal theoretically by convolving the autocorrelation of the incident pulse intensity profile with the impulse responses of the samples, illustrating the instantaneous nonlinear response of DMSO. We verify that the purely electronic cloud distortion causes the observed signal for DMSO. The Z-scan technique is used to estimate the third-order susceptibility of DMSO, which is about a quarter of that for CS2 and mainly comes from the nonlinear refraction with an intensity of less than 140 GW/cm2.
其他文献
We report on a new technique of mutual injection phase-locking fiber-laser array. This technique uses a 45o beam splitter as coupling device. Injection phase-locking process of the fiber-laser array is simulated and analyzed. Results show that constant va
The effects of gain compression on the modulation dynamics of an optically injected gain lever semiconductor laser are studied. Calculations reveal that the gain compression is not necessarily a drawback affecting the laser dynamics. With a practical inje
首次测量了无孪无畴的KIO3晶体的主折射率和倍频系数.
采用密度泛函理论框架下的第一性原理平面波计算方法，系统研究了不同应力作用下GaN 的电子结构和光学性质，对比分析了外压调制对GaN 的能带结构、态密度和光学性质变化的影响。计算结果表明：随着外应力的逐渐增加，Ga—N 的键长逐渐变小，布局数逐渐增加，共价性明显增强，离子性减弱。电子结构计算结果显示导带向高能方向漂移，而整个价带向低能方向漂移，禁带带宽明显被展宽，Ga 原子的3d 态电子与N 原子的2p 态电子的杂化程度增强。光学性质计算结果揭示了在没有应力的作用下，在1.6 eV 附近开始出现吸收边。随着
Wide-range optical sensors based on a single ring resonator are investigated theoretically and experimentally. The sensor worked at the TE and TM modes simultaneously. Because the sensitivities of the TE mode and TM mode are different, the TE mode is used
Mo/Si and SiC/Mg period multilayer mirrors are investigated for solar He-II radiation at 30.4 nm. The optical stabilities of these multilayers are measured before and after space environment simulation tests for the purpose of potential application in spa
针对国内交通标志的属性特征,提出了一种基于颜色和形状的交通标志分类算法。采用RGB模型分量值互减的方法对自然背景下的交通标志图像进行分割,提取出感兴趣区域,对标志区域进行形态学处理、边缘检测,提取标志外层轮廓。利用Hough变换识别交通标志线性特征。在识别交通标志颜色和几何形状的基础上,利用交通标志的分类知识实现交通标志的快速分类。实验结果表明,该方法容易实现,满足实时性要求,并能达到较好的分类效
针对传统红外与可见光图像融合方法存在融合图像场景对比度低、热红外目标不明显、细节与纹理不够清晰的问题,提出了一种基于多尺度低秩分解的红外图像与可见光图像融合方法。该方法通过多尺度低秩分解,将红外图像、可见光图像分别分解为多层次局部低秩图(显著图)和全局低秩图;充分考虑分解图像特点,有针对性地设计最优融合规则,有效融合红外和可见光图像的互补信息;基于融合规则重构融合图像。基于公开数据集进行实验验证。
A method of detecting dry, icy and wet road surface conditions based on scanning detection of single wavelength backward power is proposed in this letter. The detector is used to receive the backward scattered power which changes with the incidence angle.