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second harmonic waves
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  二次谐波
     Measurement of picosecond laser pulse widths with second harmonic waves generated from GaAs surfaces
     利用砷化镓表面的二次谐波测量ps激光的脉宽
短句来源
     This paper describes the principle, experimental method and results of the measurement of picosecond laser pulse widths by means of second harmonic waves generated from GaAs surfaces. The possibility of measuring femtosecond laser pulse widths with second harmonic waves generated from the surfaces of semiconductors are discussed.
     本文报道了利用GaAs晶体表面的二次谐波测量ps激光脉冲宽度的原理、实验方法和结果,并讨论了用半导体表面的二次谐波方法测量fs激光脉宽的可行性.
短句来源
     This paper describes the princples,exprental methods and results of ultrashort laser pulse width by means of second harmonic waves method(SHG),Second haymonie waves generated from GaAs surfaces and higher order harmonic waves method.
     本文讨论了超短光脉冲测量的二次谐波法(SHG)、半导体表面反射频法和高次谐波法。 用 SHG 法对调 Q 加模 Nd:YAG 激光器的光脉冲进行了测量。
短句来源
     The spetrum distribution of second harmonic waves genearaed in nonlinear crystals is studied. An aplication of phase extraction and Fourier transform is described.
     从理论上论述通过测量激光及其通过非线性光谱晶体产生的二次谐波的光谱分布 ,并利用相位提取及傅里叶变换得到激光时域分布。
短句来源
  “second harmonic waves”译为未确定词的双语例句
     Existence of Solutions for a Coupled Differential System Coming from Second Harmonic Waves
     二次谐波产生耦合方程组的解
短句来源
     A third-order correlator is built based on the technique of cross-correlation between the fundamental and second harmonic waves of femtosecond lasers. Using this correlator, the contrast ratio of femtosecond laser pulses from a typical CPA laser system is measured.
     为了准确地确定飞秒激光对比度的信息,基于两束不同激光的互相关原理,利用非线性晶体对激光强度变化十分敏感的特性,研制了一台三阶相关仪,并用其对钛宝石激光放大系统输出的飞秒激光脉冲进行了测量,得到了有关该系统的强度对比度的信息。
短句来源
     A third-order correlator is built based on the technique of cross-correlation between the fundamental and second harmonic waves of femtosecond lasers. Using this correlator, the contrast ratio of femtosecond (fs) laser pulses from a typical Ti:Sapphire laser is measured. The measurements show detail features of the fs laser pulses.
     在飞秒激光放大系统研制以及激光与物质相互作用研究过程中,良好的脉冲对比度是十分重要的一个指标,为了准确地测定激光对比度,我们利用非线性晶体对激光强度变化十分敏感的特性,研制了一台三阶相关仪,并对一台飞秒激光器进行了脉冲对比度的测量研究,所得结果揭示出了二阶相关仪所无法得到的信息, 为测量飞秒激光脉冲的对比度提供了一种简便的方法。
短句来源
     In the process of high power frequency-doubling, the temperature inside the nonlinear crystal will become non-uniform because of absorbing the fundamental and second harmonic waves, leading to phase mismatch, conversion efficiency reduce and output power instability. This phenomenon appears severe in the high power high repetition rate laser system.
     在高功率倍频过程中,非线性倍频晶体由于吸收了基波和谐波的功率,造成倍频晶体内温度的变化,破坏了晶体原来的相位匹配条件,从而导致频率变换效率降低、输出谐波功率不稳定等问题,对于高功率高重复频率激光器系统尤其严重。
短句来源
     Generally,the second harmonic waves are produced through coalescence of the forward and backward propagating Langmuir waves.
     正向Langmuir波和反向Langmuir波的相互作用被认为是产生静电的高次谐波的原因之一。
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  相似匹配句对
     Second .
     二、破自造论。
短句来源
     Second,
     二是对于?
短句来源
     On the Nondiffvacting Second Harmonic Beam
     非衍射的二次谐波
短句来源
     THE DIFFRACTION AND WALKOFF IN THE SECOND HARMONIC GENERATION
     二次谐波转换中的衍射和离散效应
短句来源
     Harmonic and Administration
     谐波及其治理
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  second harmonic waves
A coupled equation system has been used to calculate the intensity of fundamental and second harmonic waves and the phase shift of the fundamental.
      
Finally, a powerful refinement of device operation via the use of the seeded second harmonic waves is proposed.
      
Dominant nonlinear electric dipole polarizations at the interaction of fundamental and second harmonic waves in centrosymmetric media without and with memory are treated in this paper.
      
Nonlinear electric dipole polarizations of centrosymmetric media at the interaction of fundamental and second harmonic waves
      
The a.c.-polarographic techniques of the first and second harmonic waves were used.
      
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This paper presents some valuable results of frequency doubling, considering the transversal variation of the amplitude and the depletion of the fundamental wave power. By solving three dimension-coupling wave equation, the most common expressions of second harmonic wave power are driven. The influences of the fundamental wave power and the crystal length are discussed. As a special example the expressions of second harmonic wave power at low conversion efficiency are given.

本文在考虑了振幅的横向分布和基波的衰减时,给出了一些关于倍频的有价值的结果。借助于求解三维耦合波方程,导出了二次谐波功率的最一般的表达式,讨论了基波功率和晶体长度的影响。作为一个特例,也给出了低转换效率下二次谐波功率的表达式。讨论了类高斯光束倍频的平面波近似处理方法,这里借助于类高斯光束的光线方程。作为小结,我们列出了八种不同情况下二次谐波功率的表达式,其中后五种来自本文的推导。 最后,阐明了一种处理内腔倍频激光器的新方法。在我们的模型中,对于在腔内循环的基波功率而言,由于倍频的功率损耗,可视为一种可变的损耗。借助于速率方程的数值解,我们求得了激光腔参数和倍频晶体的最佳值。

Measurements of the variation of ultrasonic second harmonic wave amplitudes with the specimen temperatures and the fundamental wave amplitudes are made in molecular crystal naphthalene by using a modified pulse echo technique. Explanation of the experimental results is given and problems for further investigation are suggested.

本文采用改进了的脉冲技术,测量了分子晶体萘中二次谐波分量与基频声波的关系以及二次谐波振幅随温度的相对变化,对实验结果作了定性解释,指出了今后有待深入研究的问题。

The production of broad band laser output is discussed. The forward-and backward laser spectrum, the second harmonic wave obtained by broad band and narrow band laser irradiation on plane targets are compared.

讨论了宽带激光的产生,对比了宽、窄带激光打靶产生的正反激光谱、二次谐波谱。

 
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