Influence of polarization on laser beam coherent combining
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摘要: 为了研究光束相干合成中偏振态的特性，取理想矩形光束进行模拟分析。通过改变偏振态的退偏率、偏振态夹角、参与合成的子束数目等，观察光场在远场叠加的合成效果。讨论了这些因素对远场合成效果的光强分布、峰值功率密度、光束质量因子等的影响。模拟结果显示：当退偏率小于10%、偏振态夹角小于18时，合成后光束质量因子小于1.1。Abstract: For studying the polarization in laser beam coherent combination, ideal rectangular beams are used in simulation. With changing the degradation rate of polarization, the angles between beams axes and the number of combining beams, the synthetic effects of the laser fields are observed. And the far-field intensity distribution, the peak power and the beam quality of the combined beams are analyzed. Results show that if the degradation rate of polarization is less than 10% or the polarization angle is less than 18 degrees, the beam quality factor of combined beams could be controlled in 1.1 times the diffraction limit.
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