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首页> 外文期刊>Journal of Electromagnetic Waves and Applications >Propagation of a mixture of modes of a laser beam in a medium with saturable nonlinearity
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Propagation of a mixture of modes of a laser beam in a medium with saturable nonlinearity

机译：具有饱和非线性的介质中激光束模混合的传播

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摘要

Propagation of a mixture of modes of a laser beam through a saturable nonlinear medium has been studied using JWKB method and the paraxial ray approximation. Two second order nonlinear coupled differential equations for the beam width parameters resembling equations of coupled nonlinear oscillators of unit mass are obtained. A scalar potential of the system has been formulated whose analysis yields some valuable information like existence of two critical values of the potential within which bound state of the system exists. From the stability analysis it has been found that the stable beam propagation depends on the ratio of intensities of the two modes. A threshold of power is defined. When beam power is above the threshold value the propagation is stationary.
机译：已经使用JWKB方法和近轴射线近似研究了激光束的模式混合通过可饱和非线性介质的传播。得到了两个二阶非线性耦合微分方程，其光束宽度参数类似于单位质量耦合非线性振荡器的方程。已经制定了系统的标量势，其分析产生了一些有价值的信息，例如存在系统的绑定状态的势的两个临界值。从稳定性分析中发现，稳定的光束传播取决于两种模式的强度比。定义了功率阈值。当射束功率高于阈值时，传播是平稳的。

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