Pulse shaping by a discrete microstrip

Method for laser pulse shaping by a discrete transmission line has been improvedand simplified.Some calculations are given about deformation of the shaped pulse,passingthrough a laser amplifier.The required profile of electrical pulse can be deduced from the newcalculation when the amplified driving pulse profile is defined.The noise effect is estimated.     

长脉冲托卡马克反应堆堆心物理

本文对采用先进运行模式，具有大自举电流比值的纯感应驱动托卡马克反应堆堆心等离子体特性进行了分析。     

单脉冲BOXCARS技术在瞬态燃烧场测温中的应用

 用单脉冲交叉相干反斯托克斯喇曼散射技术测量了两种不同固体燃剂的瞬态燃烧场的温度。对燃烧场进行了优化，给出了在燃烧场中取得的部分典型单脉冲CARS光谱及其理论拟合结果，得到了燃烧场的温度及其随高度的分布；稳定燃烧时两种燃剂燃烧场的温度基本保持不变，平均值分别为2 260，2 090K；测量了实验的纵向空间分辨率。结果表明，BOXCARS技术能较好地完成复杂的瞬态燃烧场温度的测量工作。     

短脉冲高斯光束的时空形式

考虑到腔模光腰尺寸的频率依赖性，得到了一短脉冲高斯光束在自由空间传播的时域解析形式，发现其可由一复时间变量来描述，复时间变量的实部给出了脉冲的传输时间，其与波前曲率有关，虚部给出了空间量值，两者的交叉项称为时空耦合，并对傅里叶变换极限脉冲和啁啾脉冲的时空形式作了分析。     

心脏和血管系统动态耦合对人体体动脉搏波传播的影响

本文首次在心脏和血管动态耦合的基础上，研究了人体体动脉中压力和流量脉搏波的传播·左心室采作Ｅ（ｔ）＿Ｒ模型，体动脉树用Ｔ＿Ｙ模型，应用传输线理论和傅氏分析，选取了合适的心血管参数，得到了沿体动脉各处压力和流量的波形，并研究了心血管各参数对脉搏波传播的影响，对于实际工作很有帮助·     

超高亮度激光系统中光栅对脉冲整形器失调对输出脉冲时间特性的影响

在较全面地给出光栅对脉冲整形器失调产生附加相位项表达式的同时，详细地讨论了展宽器失调的附加相位放大系统传输过程中的变化，并与压缩器失调特性作了比较，分析了这些失调对超高亮度激光系统输出脉冲及其聚焦场时间特性的影响，得到了确定光栅对脉冲整形器失调容限的基本原则。     

The estimation of moments of an unknown error distribution in the discrete pulse transform

Intuition suggests that the variance of additive noise contaminating a signal can be estimated by investigation of the highest resolution level in a local Nonlinear Multiresolution Analysis. In the case of the Discrete Pulse Transforms with LULU-operators well known elegant identities between B-splines lead to some surprisingly simple and useful results.     

Regimes of operation states in passively mode-locked fiber soliton ring laser

The principal of passively mode-locked fiber soliton ring lasers is summarized, including its three output operation states: normal soliton, bound–solitons and noise-like pulse. The experimental results of the passively mode-locked fiber soliton ring lasers developed by us are given. Bound–solitons with different discrete separations and three-bound–solitons state have been observed in our fiber laser for the first time. The relationship among three operation states in fiber soliton laser is analyzed.     

可用于超精细加工的高重复率、高光束质量飞秒再生放大脉冲的产生研究

通过飞秒放大增益饱和理论及飞秒脉冲展宽的理论计算与分析，指出在优化放大腔结构参数及改变抽运光能量情况下，可以在省略展宽器基础上实现中等能量的飞秒脉冲再生放大.以此为依据，采用低抽运能量和放大腔中钛宝石晶体离焦技术，成功地进行了无展宽器的高重复率飞秒钛宝石再生放大及压缩技术的实验研究，并获得了高光束质量的飞秒放大光脉冲，放大光脉冲能量大于100μJ，重复频率为1kHz，光谱带宽7.7nm，压缩后脉宽500fs. 关键词： 飞秒光脉冲 再生放大 光束质量 增益饱和     

Energy yield of photoluminescence in a system of particles with three energy levels on periodic pulse excitation

Within the framework of the probability method, we obtained analytical expressions for the luminescence power, absorption power, and energy yield of photoluminescence in a system of particles with three energy levels on periodic pulse excitation. It is shown that at certain periods and durations of exciting pulses the energy yield can be higher than under stationary excitation conditions. Mordovia State University, 68, Bol'shevistskaya St., Saransk, 430000, Russia. Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 64, No. 2, pp. 269–272, March–April, 1997.