基于腔量子电动力学（QED），通过双光子过程，提出了一种制备三粒子singlet态的简单方案。一个最初处于激发态的
Chip-scale, tunable narrow-linewidth hybrid integrated diode lasers based on quantum-dot RSOAs at 1.3 μm are demonstrated through butt-coupling to a silicon nitride photonic integrated circuit. The hybrid laser linewidth is around 85 kHz, and the tuning r
The direct replication of W/Si supermirrors is investigated systematically. W/Si supermirrors are fabricated by direct current (DC) magnetron sputtering technology. After deposition, the supermirrors are replicated from the supersmooth mandrels onto ordin
Mode distortion induced by stimulated Raman scattering (SRS) has become a new obstacle for the further development of high-power fiber lasers with high beam quality. Here, an approach for effective suppression of the SRS-induced mode distortion in high-po
We propose a continuous-wave (CW) middle infrared (MIR) and long infrared (LIR) dual-band laser for the calibration and effect research of infrared detecting and imaging systems. A total output power of 18 W is achieved by the proposed dual-band laser thr
A non-scanning, non-interferometric, three-dimensional (3D) optical profilometer based on geometric optics, critical angle principle, and the use of a charge-coupled device (CCD) camera is presented. The surface profile of the test specimen can be transfe
采用热弹性模型, 对光学薄片点胶过程进行了有限元分析。对点胶后影响工件面形变化(Δp)的工艺参数进行了优化。研究结果表明, 对于光学薄片(直径为100 mm, 厚度为2 mm), 宜选择具有高弹性模量和低热膨胀系数的薄底板材料, 且胶点的半径、个数及弹性模量越小, Δp越小; 胶点位置应该避开高Δp区域; 胶点的热膨胀系数对Δp的影响较小。
CCD图像传感器是目前科学成像领域主流的固体成像器件。一般而言, 当成像系统中使用CCD器件时, 首先需要测量它的一些性能指标, 这是判断该CCD器件是否满足整个系统性能要求的重要依据。对CCD成像器件性能的测试方法进行了探讨, 涉及的参数包括增益、噪声、电荷转移效率、线性和满阱电荷等。研究重点是如何应用扩展像素边界反应方法及同位素X射线方法检测CCD的电荷转移效率, 以及利用X射线方法测量器件的增益。最后以理论研究为基础, 发展并提出了一套切实可行的CCD器件检测方法, 同时基于E2V公司4K×4K芯片
针对多个板型物体混叠摆放的场景,提出了一种快速有效的分割算法。该算法充分利用有序点云的特点,将自顶向下以及自底向上的分割策略结合,根据三维点的空间位置和法向量,利用随机采样一致性(RANSAC)算法从三维点云数据中快速提取平面点集;然后将提取的平面点集所对应的图像坐标映射为二值图像,通过连通区域分析将其分割为多个连通的平面区域;接着利用"胶水"算法对这些区域进行快速合并,并对较大的弱连接连通区域进