论文部分内容阅读
二极管激光器1993年可能超过现有技术
【出 处】
:
激光与光电子学进展
【发表日期】
:
1993年30期
其他文献
提出了一种用于太赫兹图像的基于噪声估计的自适应迭代去噪算法。利用噪声水平估计方法获得真实实验图像的噪声标准差,使用基于四叉树的加权双平方非局部均值去噪方法对噪声图像进行去噪以提高重建图像的质量,并对去噪后的图像再次进行噪声估计与去噪,通过反复迭代获得最佳的去噪效果。实验结果表明,所提方法能较好地保留图像的细节,有效地去除由成像系统所引起的背景噪声,其对太赫兹图像具有较好的去噪效果。
We synthesize continuous solid solutions with monophasic zircon-type structure of vanadates of formula YxBi0.95-xVO4:0.05Dy3 (x = 0–0.95) using a combined method of co-precipitation and hydrothermal synthesis. The X-ray diffractometer patterns confirm th
We propose a novel scheme for synchronous optical sampling based on multicast parametric process. The linearly chirped and time-broadened pulses are utilized to replace the traditional mode-locked sampling pulses. An optical sampling rate of 80 Gbit/s is
期刊
美国空军中央硏究所的西耳佛曼(B. Silverman)已将激光全光照相技术用来测量雾滴按其大小的分布,作为硏究雾的形成、演变及消散的一部分。其实验装置为在系统的一端有一激光光源,另一端有一记录胶片。雾或悬浮微粒占据光激射器与胶片间的空间。
期刊
We report on the successful demonstration of a 150 J nanosecond pulsed cryogenic gas cooled, diode-pumped multi-slab Yb:YAG laser operating at 1 Hz. To the best of our knowledge, this is the highest energy ever recorded for a diode-pumped laser system.
针对图像修复过程中单一的字典迭代时间长、适应性差、修复效果不理想的缺点,提出了一种结合图像特征聚类与字典学习的改进的图像修复方式。首先破损的图像被分割成小块,并产生索引矩阵。然后使用控制核回归权值算法,对其进行图像聚类。通过对图像内在结构与未破损区域信息的挖掘,分割的图像块根据SKRW的相似性进行了分类。之后针对不同类型结构的图像,通过自适应局部明感字典学习的方式,获取每类字典的过完备字典。然后,
Approximate formulas of temperature and stress distributions and thermal induced effects in a heat c
Approximate formulas of transient temperature and stress distributions in the slab of a two-side pumped heat capacity laser are attained by solving the heat diffusion equation. Based on the formulas, the distributions of temperature and stress during the