项目名称: 光纤超连续谱光源在湍流大气中传输特性的研究
项目编号: No.11504424
项目类型: 青年科学基金项目
立项/批准年度: 2016
项目学科: 数理科学和化学
项目作者: 吴武明
作者单位: 湖南大学
项目金额: 23万元
中文摘要: 超连续谱光源在很多应用领域中都会受到大气湍流的影响,但目前缺乏有效的理论分析方法。基于前期研究成果,本项目结合光纤超连续谱光源空间相干性特点,创新性地提出“光纤超连续谱光源可等同于多个不同中心波长的多色光通过光谱合成得到的光源,其中每个多色光在其谱宽范围内的空间相干性不变”的概念。项目将主要开展大气湍流对光纤超连续谱光源光谱移动和光束扩展影响的研究:(1) 采用理论分析和实验测量的方法研究光纤超连续谱光源在不同波长处的空间相干度;(2)数值模拟不同特性的多色光在湍流大气中的传输特性;(3)利用非相干合成光束的分析方法,理论研究光纤超连续谱光源通过湍流大气的传输特性;(4)在大气湍流模拟装置上开展光纤超连续光源传输的实验研究,验证和完善相关理论。所得研究结果不仅有理论上的创新性,而且可为光纤超连续谱光源在湍流大气中的传输和控制等应用提供参考和计算依据。
中文关键词: 大气湍流;光纤超连续谱光源;光斑扩展;光谱移动
英文摘要: The supercontinuum source is influenced by atmospheric turbulence in many applications, but there is not an effective analytical way in theory. Based on the results of our research and the spatial coherent property of fiber supercontinuum sources, a new concept is given that the fiber supercontinuum source is equal to the beams by spectrum combining of different central wavelength polychromatic lights, each of which the spatal coherent length is immovable within the spectrum bandwidth. The proposal mainly contains the following research contents: (1)Studying the property of spatial coherent length of different wavelengths of fiber supercontinuum sources; (2)Investigating the spectral shift and beam spreading of kinds of polychromatic lights in theory; (3)Founding the theory model of the propagation of fiber supercontinuum sources through atmospheric turbulence in the incoherent combined way; (4)Experimentally investigating the propagation of fiber supercontinuum sources through atmospheric turbulence, which can be used to validate and improve the related theories. The results obtained in this project not only have theoretical originality, but also provide the referrence and calculation methods for studying the propagation of fiber supercontinuum sources in atmospheric turbulence.
英文关键词: atmospheric turbulence;fiber supercontinuum source;beam spreading;spectral shift