论文部分内容阅读
激光与光电子学进展1989年第26卷第7期 目录
【出 处】
：
激光与光电子学进展
【发表日期】
：
1989年26期
其他文献
Population ratios between excited states are measured to build the excited state Faraday anomalous dispersion optical filter (ESFADOF). We calculate these values between the excited states according to the spontaneous transition probabilities using rate e
We study the theoretical and experimental effects of hole quantity and inter–inter-hole spacing on insertion loss for using femtosecond laser to make bend-sensitive multi-hole plastic optical fiber (POF), and also analyze the mechanism of bending loss in
受颗粒碰撞、机械搅拌等因素的影响,运动上升的浮选气泡会产生严重的偏转与形变。对此,提出一种用于测量气泡的体积和表面积的水平置位分割方法。建立了浮选工艺过程中运动气泡的观测系统,采集气泡图像。利用基于区域分割的边缘检测方法提取气泡边缘。针对重叠气泡,使用曲率尺度空间角点检测算法和方向链码标记凹点,以此分割重叠的轮廓,最小二乘拟合重建独立气泡的边缘。根据边缘计算气泡的偏转角度,自适应选取分割间隔。通过
In optical scattering particle sizing, a numerical transform is sought so that a particle size distribution can be determined from angular measurements of near forward scattering, which has been adopted in the measurement of blood cells. In this paper a n
We present a simple approach based on photonic reservoir computing (P-RC) for modulation format identification (MFI) in optical fiber communications. Here an optically injected semiconductor laser with self-delay feedback is trained with the representa
期刊
求出高阶Hirota方程在可积条件下的一种精确呼吸子解, 并在解的基础上得到Hirota方程的一种怪波解。 从怪波解的形式和图形中深刻认识到怪波的两个特征——时空局域性和高能量特点, 认识到怪波产生的物理机制——平面波和其他波的叠加。利用分布傅立叶方法数值研究了怪波在考虑自频移和拉曼增益时的传输特性, 自频移使怪波中心发生偏移, 拉曼增益使怪波分裂得更快；数值模拟了怪波之间的相互作用特点——随着怪波之间距离的减小, 怪波将合二为一, 成为一束怪波, 之后再分裂, 并分析了拉曼增益和自频移对怪波相互作用的影
We demonstrate a photonic band gap (PBG) from one-dimensional (1D) periodic structures created by a double-layer unit cell with an air layer and an anisotropic nonmagnetic left-handed metamaterial (LHM) layer whose permittivity elements are partially nega