基于外腔光纤激光器阵列频谱组束的耦合效率  

Coupling Efficiency of Spectral Beam Combining of Fiber Laser Array in an External Cavity

作　　者：占生宝[1] 赵尚弘[1] 王文辉[2] 张居梅[3] 吴卓亮[1] 胥杰[1] 

机构地区：[1]空军工程大学电讯工程学院,陕西西安710077 [2]中国人民解放军94188部队,陕西西安710077 [3]西安通信学院,陕西西安710106

出　　处：《半导体光电》2008年第5期753-758,共6页Semiconductor Optoelectronics

基　　金：国家自然科学基金资助项目(60678018)

摘　　要：分析了外腔高斯光束频谱组束的机理。针对Bochove推导点特征扩展系数所使用的方法繁琐问题,运用角特征的近似形式,推导了点特征的扩展系数;并基于频谱组束模型,讨论了影响耦合效率的因素。结果表明,外腔最大耦合效率时,激光器阵列应排列成开口背离传输透镜的抛物线形;当阵元的横向位移超过1.5 mm时,抛物线形排列的阵元耦合效率是相同位置直线形排列阵元耦合效率的2倍;使用外腔频谱组束,应尽量选择焦距较长的传输透镜。The mechanism of spectral beam combination on Gaussian fundamental of the fibers is analyzed in an external cavity with grating. Because the approach used by Bochove is rather cumbersome, the extension coefficients of the point characteristic for a simple symmetric convex lens are derived using the approximate form of the angle characteristic. Based on the spectral combination model, the factors affecting coupling efficiency of the external cavity are discussed, which shows that the fiber laser array should be arranged as parabola that curves away from the lens in order to obtain the maximum coupling efficiency, and the coupling efficiency doubles as that arranged in straight array at transverse displacement of 1.5 ram. This investigation further shows that the lens with long focus should be used in spectral combination of external cavity.

关 键 词：光纤激光器 频谱组束 点特征 角特征 耦合效率 

分 类 号：TN248[电子电信—物理电子学]