非傍轴径向阵列高斯激光束的传输特性

摘要

Analytical expressions {or the propagation of nonparaxial radial array Gaussian laser beams in coherent and incoherent combinations are derived and used to study their propagation properties in free space, where the effect of array beam parameters on the intensity distribution of the resulting beam is stressed. It is shown that the ratio of array radius to waist width is a key parameter. The intensity distribution of the resulting beam in both coherent and incoherent combinations remain unchanged under the condition that the ratio of array radius to waist width is kept fixed, while the intensity distribution and the axial intensity maximum in the far field of the resulting beam depend on the combination scheme.%推导出相干和非相干非傍轴径向阵列高斯激光束的传输公式,并用以研究了径向阵列光束在自由空间的传输特性,重点分析了阵列光束参量对合成光束光强分布的影响.结果表明:阵列半径与束腰宽度之比是一个关键参量,当它固定时,相干和非相干合成光束的光强分布都保持不变,但合成光束的光强分布和远场轴上光强最大值都与合成方式有关.