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根据广义惠根斯-菲涅耳原理,分析了单模光束相干合成、单模光束非相干合成、多模光束相干合成和多模光束非相干合成等4种类型的合成光束阵列在实际湍流大气中的传输特性,计算了传输效率与有效作用距离。结果表明,多模光束阵列相干合成与非相干合成的传输效率与有效作用范围区别不大,单模激光阵列的传输效率优于多模激光阵列。相干合成单模激光阵列的传输效率较非相干合成情形的优势随湍流强度的增大而降低,在湍流强度较强时,相干合成已经没有优势。在相干合成的基础上具备倾斜像差校正能力的自适应锁相单模光纤激光阵列是构建100 kW战术激光单元的最佳方式。
According to the principle of generalized Whiggens-Fresnel, four kinds of synthetic beam arrays such as single-mode beam coherent synthesis, single-mode beam non-coherent synthesis, multi-mode coherent beamforming and multi-mode non-coherent beamforming are analyzed in real turbulent atmosphere In the transmission characteristics, calculated the transmission efficiency and effective distance. The results show that the transmission efficiency of multi-mode beam array is not different from that of the non-coherent one. The transmission efficiency of single-mode laser array is better than multi-mode laser array. The advantages of the coherent synthetic single-mode laser array in transmission efficiency over the non-coherent synthesis decrease with increasing turbulence intensity, and the coherent synthesis has no advantage when the turbulence intensity is high. An adaptive phase locked single mode fiber laser array with skew correction capability based on coherent synthesis is the best way to build a 100 kW tactical laser unit.