论文部分内容阅读
主动锁模Cr-Yb-Er玻璃皮秒激光器
【出 处】
:
激光与光电子学进展
【发表日期】
:
1993年30期
其他文献
光纤陀螺线形检测系统是一种测量路面线形曲线的检测方法。结合光纤陀螺线形检测原理以及常用的路面平整度指标,研究了一种基于光纤陀螺的路面平整度指标获取方法。实验分析和应用结果证明,线形测量过程中所采集的光纤陀螺角速度概率分布和标准差与路面平整度具有较强的关联性。通过提取光纤陀螺检测桥梁线形的高程标准差,可得到路面平整度系数。本方法可反映路面的宏观平整度以及路面传递至车辆的行车舒适性,并且可实现桥梁线形
Investigations of ionization-induced injection of laser wake field acceleration using phenomenologic
We develop a phenomenological model to investigate dynamics of ionization-induced injection. In the "bubble" regime of laser wakefield acceleration (LWFA), it is found that there is an upper limit for laser intensity of ionization-induced injection. In
Analysis of electromagnetic pulses generation from laser coupling with polymer targets: Effect of me
Powerful lasers interacting with solid targets can generate intense electromagnetic pulses (EMPs). In this study, EMPs produced by a pulsed laser (1 ps, 100 J) shooting at CH targets doped with different titanium (Ti) contents at the XG-III laser facility
期刊
本文研究了高功率激光束通过国产的低损耗光纤的耦合-传输特性。已研制成由透镜-光纤-透镜组成的光纤光缆。通过2米长的石英光纤光缆已能输出200W的激光光束,其辐合-传输效率达90%。到目前为止,已成功地使用光纤光缆进行了六例肝癌手术、一例肝血管瘤手术和一例口腔癌手术。
期刊
提出一种在大规模光电混合神经网络系统中实现可编程拓扑重构的有效方法。文中介绍了这种方法的原理、运用技术以及采用这种方法在已有NP1024光学数字神经网络处理器中运行单层反馈型和多层前馈型等不同网络拓扑结构的实验结果。
空间相机作为空间态势感知的主要器件,需实时监测其成像质量,但旋转卫星平台观测地面靶标以测量调制传递函数(MTF)会增加技术风险且无法进行多次测量,因此需要研究无需进行平台翻转以实时测量空间相机在轨MTF的方法。利用深空背景中常见的星点作为在轨MTF测量的目标,结合点源法研究其在轨MTF测量的方法,利用高斯拟合定位和多图配准重构点扩展函数,提出最终基于星点的MTF检测方法。仿真和实验结果表明:所提方
High-fidelity, low-latency polarization quantum state transmissions over a hollow-core conjoined-tub
Hollow-core fiber (HCF) promises to unify air-borne light propagation and non-line-of-sight transmission, thus holding great potential for versatile photonics-based quantum information applications. The early version of HCF based on photonic-bandgap guida
期刊
针对SiamRPN(Siamese Region Proposal Network)在目标被短时遮挡以及外观剧烈变化的情况下存在定位不准确的问题,提出一种结合目标跟踪缓冲区与三元组损失的目标跟踪算法。该算法首先将原有的固定模板改为动态模板,提升复杂环境下相似度判别的可靠性;然后在模板缓冲区稀疏地缓存目标外观以应对跟踪过程中非语义样本的干扰,增强目标跟踪的鲁棒性;最后应用三元组损失以充分利用目标的正
Ta2O5 films were prepared with conventional electron beam evaporation and annealed in O2 at 673 K for 12 h. Laser-induced damage thresholds (LIDTs) of the films were performed at 532 and 1064 nm in 1-on-1 regime firstly, and then were performed at 532, 80