Innovative single-shot 2D pulse front tilt diagnostic

来源 :HighPowerLaserScienceandEngineering | 被引量 : 0次 | 上传用户:liangmingming
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
The presence of pulse front tilt (PFT), caused by angular dispersion (AD) in femtosecond laser pulses, could degrade the performance of the laser system and/or impact the experimental yields. We present a single-shot diagnostic capable of measuring the AD in the xy plane by adopting an intensity mask. It can be applied to stretched pulses, making it ideal for diagnosing the AD along the amplification chain of a high-power laser system, and to ultrashort pulses exiting from an optical compressor. In this way, it can help in properly characterizing a laser pulse before it is delivered to the target area. In this Letter, we present experimental evidence of AD retrieval for different compression configurations, supported by theoretical analysis.
其他文献
Single-pulse and multi-pulse damage behaviors of "standard" (with \lambda/4 stack structure) and "modified" (with reduced standing-wave field) HfO2/SiO2 mirror coatings are investigated using a commercial 50-fs, 800-nm Ti:sapphire laser system. Preci
A high-precision temperature-controlled narrow band-stop fiber Bragg grating (FBG) filter and light source self-calibration technique are proposed for application in the Brillouin optical time domain re°ectometer (BOTDR) sensor system. With the proposed a
本文进行了自发参量下转换(SPDC)产生795 nm关联光子对的实验研究。选择Ⅱ类PPKTP晶体作为非线性介质,用倍频获得的3975 nm紫光作为泵浦光。在实验上首先通过符合计数测量了紫光单次穿过PPKTP晶体时SPDC过程产生的光子对亮度,当泵浦光功率为5 mW时,测得符合计数为53 150/s。然后将下转换过程放入光学谐振腔中,对下转换光子的线宽进行压窄。实验上测得下转换光子对的关联时间为14.6 ns,对应线宽约为15 MHz。本文为纠缠光子对在Rb原子系综中的存储提供了实验基础。
A method for measuring the frequency stability of tunable laser is proposed by using confocal Fabry-Perot (F-P) interferometer. The F-P interferometer is used to get the output frequency of the laser as a reference, and the method eliminates the need of a
期刊
期刊
针对分幅面成像任意反射面速度干涉仪(VISAR)时间分辨和速度分辨的不足,研制了一套超高时间分辨空间相移面成像VISAR。用双VISAR干涉腔光路解决超短脉冲相干性问题,实现超高时间分辨;用沃拉斯顿棱镜代替传统点VISAR中的偏振分束棱镜分光实现简洁的空间相移光路;以梳状干涉条纹作为信号载体实现空间分辨;用空间变换方法实现相移条纹的像素匹配;再由四路推挽式信号处理方法获得相位,进而获得全场速度分布。该套面成像VISAR具有150 ps时间分辨和6 m/s速度分辨。用其测量了激光驱动铝膜飞片的速度场,给出了
激光诱导击穿光谱(LIBS)技术是一种基于原子发射光谱和等离子体发射光谱的物质成分分析技术。利用LIBS技术对水中的Pb污染进行检测, 选择Pb元素的最强峰405.8 nm作为分析线, 以Si(390.6 nm)为内标元素, 经线性拟合得到Pb的检出限为7.40×10-6。建立了基于生物地理学优化(BBO)算法的定量分析模型, 利用该模型分别测定了不同Pb元素浓度的35份样品的LIBS谱线, 其中的30组数据被用来训练BBO定量分析模型, 剩余的5组数据被作为测试集来评估模型的分析能力。结果表明:在利用B
We experimentally demonstrate the optical properties of gratings engraved in a single-mode waveguide fabricated on top of a dielectric multilayer platform. The structure can be approached as a reflector for Bloch-surface-wave-based two-dimensional optical
本文报道了用分光光度仪对In-Sb膜薄的光学性质进行测量的结果,并采用较严格的双层膜透射公式进行处理.获得了折射率n、消光系数k的数据,并由此计算出吸收系数α和波长λ的关系及光学能隙和介电常数虚部2nk.研究了In-Sb薄膜在相变过程中能隙的变化规律.