照片和视频的临界功率。
当初始功率等于临界功率时，可以得到空间光孤子。
When the input power equals the critical power, a spatial optical soliton occurs;
当初始功率等于临界功率时，可以近似得到双曲正割型空间孤子。
When the initial power equals the critical power, the hyperbolic secant shaped spatial soliton can be obtained approximately.
当光束、响应函数的椭圆率满足一定条件时，两个临界功率可以相等。
When the ellipticities of light beam and response function satisfy certain conditions, these two critical powers are equal.
当初始功率等于这一临界功率，光束从光腰处入射时，可得到椭圆厄米高斯空间光孤子。
When the initial power is equal to the critical power and light beam is incident at the beam waist, the elliptical Hermite-Gaussian spatial optical soliton is obtained.
在此基础上，运用变分法得到了椭圆厄米高斯光束各参量的演化方程、演化规律和两个临界功率。
Based on this, the evolution equations, evolution laws of elliptical Hermite-Gaussian light beam's every variable and two critical powers are also derived using variational method.
当初始功率等于临界功率时，可以得到一个稳定的空间孤子，而一般情形下，束宽则作周期的压缩或展宽变化。
When the initial power equals the critical power a stabile spatial soliton is obtained and generally the beam width takes periodical contraction or diffraction.
得到了非线性系数以及特征长度和预倾角的关系，并且给出了强非局域性的非线性薛定谔方程，最终得到了单孤子和临界功率的解析解。
Then the Schrdinger-type nonlinear equation in strong nonlocality was given and from the equation the analytical expressions of the single soliton and the critical power .
得到了非线性系数以及特征长度和预倾角的关系，并且给出了强非局域性的非线性薛定谔方程，最终得到了单孤子和临界功率的解析解。
Then the Schrdinger-type nonlinear equation in strong nonlocality was given and from the equation the analytical expressions of the single soliton and the critical power .
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