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脉冲宽度

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However, the pulse width becomes broad considering TOD or FOD.

而当考虑到三阶色散、四阶色散时,初始啁啾导致脉冲宽度大于无初始啁啾脉冲的宽度。

The time delay (T1) that NAND gate 403 takes to generate a falling edge in VIN plus the time delay (T2) that a falling edge in VIN takes to propagate through pulse width generator 404 to VOUT plus the time delay (T3) for flip-flops 401 and 402 to generate falling edges in the UP and DN signals after a falling edge in VOUT equal the minimum pulse width of the UP and DN signals (T1+T2+T3=MPW).

NAND门403在VIN中生成下降沿的时间延迟(T1)加上VIN中的下降沿通过脉冲宽度发生器404传递到VOUT的时间延迟(T2)再加上触发器401和402在VOUT中的下降沿后在UP和DN信号中生成下降沿的时间延迟(T3)等于UP和DN信号的最小脉冲宽度,即(T1+T2+T3=MPW)。

It was found that the pulse distortion can be quite severe depending on frequency, pulse width ,and path length.

应用傅立叶时域积分近似解方法对毫米脉冲波通过雨媒质时的传输特性进行了研究和分析,得出了脉冲畸变随频率、降雨率、脉冲宽度及传播距离的变化关系,讨论了脉冲展宽与压缩随传播常数二阶导数的关系。

It shows that the control pulse width, the SOA length effect and the nonlinear gain compression effect influence the width of the switching window, and they are the main factors in limiting the switching speed of the CPMZ configuration.

研究表明:控制脉冲宽度、半导体光放大器的长度和非线性增益压缩影响着控制脉冲和信号脉冲反向传播开关窗口的大小,是限制控制脉冲和信号脉冲反向传播高速工作的主要因素。

The research work presented in this dissertation focused on developing the scheme and techniques of OPCPA. This dissertation gives the results of the theoretical and experimental investigation on OPCPA scheme. The validation of OPCPA at high energy level was demonstrated successfully. And some important results were achieved. Several key techniques related to developing table-top ultra-intense and ultra-short OPCPA laser system were put forward, for example, the generation of femtosecond seeding pulses, the precisely temporal synchronization of the pump and signal pulses, the pulse stretching and recompression, the OPCPA process with high energy conversion efficiency and etc. Based on the integration of these key techniques, a 1.46-TW/153-fs OPCPA table-top ultra-intense and ultra-high laser system has been developed, which, to the best of our knowledge, has generated laser pulses with the shortest pulse duration and the highest peak power among the joule level OPCPA systems in the world.

本学位论文工作主要是瞄准 OPCPA 这一国际上提出不久并处于初级阶段的新概念,重点开展了 OPCPA 新原理的理论模拟、实验验证,以及基于 OPCPA 新原理的小型化超强超短激光系统的研究与发展,创造性地解决关键科学技术问题,建立并发展相关关键科学技术,如超短脉冲种子源的产生、小型化强激光泵浦源的研制及其脉冲的整形、信号光与泵浦光的精确同步、高效率光学参量放大及高保真脉冲展宽与压缩等关键技术,并在单元技术的总体集成方面取得了重大创新性进展与突破性研究成果,获得了国际上高量级泵浦条件下 OPCPA 激光研究中峰值输出功率最高且脉冲宽度最短的总体领先结果。

Based on two order approximation of the variation of refraction index produced by self-action while optical pulses are traveling in Kerr-medium,the propagation equation has been solved.Furthermore,the strict analytical expressions of the amplitu

文摘:将光脉冲在克尔介质中自作用产生的折射率变化作二阶近似,求解所得到的传播方程,得到啁啾高斯脉冲幅度,脉冲宽度和周啾参数随传播距离变化的严格解析解,讨论了基模高斯脉冲孤波传播的条件。

The effects of pulse parameters such as pulse width Ton, pulse interval Toff, pulse frequency f, pulse current density J on the morphology ,grain size , hardness, internal stress and orientation of coating , and coherence of coating to sucbstrate have been examined .

研究了脉冲电镀参数:脉冲宽度Ton ,脉冲间隔Toff,脉冲频率f,脉冲电流密度 J对镀层微观形貌、颗粒大小、硬度、与基体结合力的影响,分析了镀层内应力、择优取向与脉冲参数的关系。

The sterilization by the means of pulse d-light is a new method of unheated sterilization.

脉冲强光杀菌是一种新兴的冷杀菌技术,自制脉冲强光杀菌装置,光脉冲的脉冲宽度为20μs,最大输入能量为644J。

Based on Stuart et al.'s electron density evolution equation, the electron density evolution process in fused silica film irradiated by short-pulse laser for τ∈[0.015] ps were studied by means of numerical method. The effects of initial electron density N and laser pulse width τ on laser threshold intensity I and damage threshold fluence. F were analyzed respectively.

基于STUART等人的电子密度演化方程,运用数值模拟方法,研究了脉宽为τ∈[0.01, 5]ps范围内单脉冲激光作用下熔融石英薄膜中电子密度演化过程;讨论了初始电子密度、激光脉冲宽度对阈值功率密度和阈值能量的影响;分析了初始电子密度、激光脉冲宽度对多光子离化及雪崩离化的影响。

The temporal and spectral behavior of the pulse transmitting in the glass material under different input pulse conditions is studied.

圆偏振光入射时,可以获得更短脉冲宽度的压缩脉冲和更窄的光谱宽度。

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