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变更公司名称。

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请在下面输入您的姓名、公司名和国家（地区）信息。

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必须输入公司名称或其它字符串。

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An analytic expression of the chirp of orthogonally polarization modes is derived based on coupled nonlinear Schrdinger equation. It is analysised that the walk-off effect of polarization modes and power budget in the fiber influences the chirp.

利用耦合非线性薛定谔方程推导出两垂直偏振耦合模产生啁啾的表达式，分析了偏振模走离效应和入纤功率分配对啁啾的影响。

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By a method for comparing, The conversion efficiency formula of the Gaussian wave for second-harmonic generation ( CEFGSHG) in general circumstances, which took accounts of walk-off effect and self-focus effect together, was attained.

通过类比的方法给出了一般情况下，同时考虑走离效应和自聚焦效应时的高斯光束倍频转换效率公式。

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The results show that the frequent energy commute induced by random birefringence in non-polarization holding fibers defers the walk-off of the pulses in two polarization directions and makes for the formation of the bound state.

研究结果表明：相对于具有保偏特性的强双折射光纤，非偏振保持光纤中随机双折射所致的2个模式间频繁的能量交换，减缓了2脉冲的走离，有利于束缚态的形成；

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When the waist radius of the fundamental wave is small, the walk-off is the main factor that makes the SHG and THG conversion efficiency decrease, while the effect of detuning angle is little.

初始入射基频光束腰半径较小时，离散效应是二次谐波转换和三次谐波转换效率降低的主要因素，失谐角对三次谐波转换的影响较小；

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Further, even if in the case of continous wave pumped, walk-off does have distinct effect on the amplification of strong pulse signal, leading to amplitude difference for two sub-pulses and pulse shift.

而且即使在连续光抽运的情况下，走离效应对强脉冲信号的放大也产生了显著影响，即促使两个子脉冲振幅不等以及脉冲漂移。

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The parameters such as nonlinear coefficient, allowing angle and walk-off angle of the second harmonic and fourth harmonic crystal were calculated. The influence on conversion efficiency of incident spot radius was simulated.

计算了二倍频和四倍频晶体相位匹配角、非线性系数、允许角、走离角等参数，模拟了注入光光斑半径对转换效率的影响。

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It is also found that using a DDF with a greater dispersion parameter, or using a smaller walk-off effect can broaden the gain spectrum width and increase the maximum value of gain spectrum.

研究同时发现，较大的色散缓变参量及两光束较小的离散均会使增益谱的谱宽加宽，振幅的增长速度加快。

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The results show that the walk-off effect significantly influence the chirp when the walk-off effect is minor and the chirp tends to zero when the walk-off effect exceed the fixed value.

研究结果表明：较弱的走离效应对啁啾影响较大，当走离效应参量超过某一值时啁啾趋于零；

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Studies on phase-matching of three wave interaction of uniaxial have been discussed in detail and the expressions of walk-off angle and acceptance angle have been deduced in theory.

详细讲解了单轴晶体中三波互作用的相位匹配计算以及单轴晶体的走离角、允许角的理论推导和表达式。

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Through numerical simulation, spatial walk-off, pulse width and intensity distribution of second harmonic are analyzed with different crystal lengths, waist radius, pulse widths.

通过数值模拟，研究不同晶体长度、束腰半径和脉宽时的谐波脉宽、空间走离和强度分布情况。

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This crystal is an ideal nonlinear crystal, which can apply the maximum nonlinear coefficient, avoid the walk-off effect and apply the whole transmission range of the crystal.

这种周期极化晶体，可以应用晶体最大的非线性系数，避免三波的走离效应，理论上可以应用晶体的整个通光范围，是目前理想的非线性光学晶体。

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When phase matching and group velocity matching are met, the effects of spatial walk-off, group velocity dispersion and diffraction on second harmonic are discussed in detail.

当满足相位匹配和群速度匹配时，讨论空间走离、群速度色散和衍射效应对倍频脉冲产生的影响。

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As the waist radius of the fundamental wave increases, the effect of the walk-off slowly reduces and the effect of detuning angle increases.

随着束腰半径的增加，离散效应的影响逐渐减小，失谐角对三次谐波转换的影响逐渐增加。

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The main contents are as follows, By octave efficiency formula, the effect of walk-off angle and crystal length on octave efficiency are analyzed.

论文的主要内容包括：理论方面，由倍频效率的公式理论分析了非线性晶体的走离角以及晶体长度对倍频效率的影响。

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For a single polarization direction, the weak polarization walk-off effect influences the chirp to a certain degree, while the strong influences little;

较弱的偏振走离效应对啁啾有一定影响，较强的偏振走离效应对啁啾几乎没有影响；

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