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.
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