摘要
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。
Propagation properties of four combined beams,i.e.,coherently combined single mode laser,incoherently combined single mode laser,coherently combined multi-mode laser and incoherently combined multi-mode laser,in turbulent atmosphere are analyzed by using extended Huygens-Fresnel principle.The propagation efficiency and effective range are numerically evaluated.The calculating results show that there is no significant difference in propagating efficiency and effective range of coherent or incoherent beam combining,and the single mode laser array has advantages in propagation efficiency over multi-mode beams.The advantage of coherent beam combining decreases with an increase in the intensity of turbulence,and there is no difference between coherent and incoherent combining in strong turbulence.The adaptive phase-locked single mode laser array that can correct tilted aberration is the best choice for developing a 100 kW tactical laser system.
出处
《中国激光》
EI
CAS
CSCD
北大核心
2010年第3期733-738,共6页
Chinese Journal of Lasers
基金
国防科技大学研究生创新基金(B070701)资助项目
关键词
大气光学
相干合成
非相干合成
广义惠根斯-菲涅耳原理
大气湍流
光束质量
atmosphere optics
coherent combining
incoherent combining
extended Huygens-Fresnel principle
atmospheric turbulence
beam quality
