摘要
以高斯光作为参考光,实验研究了携带不同拓扑荷数的拉盖尔-高斯(LG)涡旋光在浑浊水下的传输行为。结果表明,水体较浑浊(衰减长度不大于0.118m)时,拓扑荷数较大的LG光束具有更强的水下传输能力;对于透射光束的能量密度分布而言,传输距离决定最佳拓扑荷数,与水体浑浊程度无关。该实验方法和测量结果对LG涡旋光在水下光通信和水下目标探测等领域的应用具有潜在的指导意义和工程价值。
The turbid underwater propagation of Laguerre-Gaussian（LG）vortex beams is investigated experimentally with different topological charges,and Gaussian beams are used as the reference light.Results show that LG beams with large topological charge have strong underwater propagation capability when water is relatively turbid（the attenuation length is not higher than 0.118 m）.With respect to the energy density distribution of the transmission beams,the transmission distance determines the optimal topological charge,and it is independent of the water turbidity.The experimental method and measured results have potential guiding significance and engineering value for the applications of LG vortex beams in underwater optical communication,underwater target detection and other fields.
出处
《光学学报》
EI
CAS
CSCD
北大核心
2017年第6期42-48,共7页
Acta Optica Sinica
基金
国家自然科学基金(61505184)
装备预研基金(9140A05020115ZW05058)
关键词
海洋光学
水下激光
涡旋光
浑浊水体
拓扑荷数
oceanic optics
underwater laser
vortex beams
turbid water
topological charge
