光纤激光器共腔法纵模选择技术  

Fiber laser longitudinal mode selection using common resonant cavity

作　　者：王大量[1] 王翠云[1] 徐连宇[1] 王玉杰[1] 余晓琦[1] 王子南[1] 李正斌[1] 

机构地区：[1]北京大学区域光纤通信网与新型光通信系统国家重点实验室,北京100871

出　　处：《红外与激光工程》2011年第6期1044-1048,共5页Infrared and Laser Engineering

基　　金：国家自然科学基金(60772003);国家863计划(2006AA12Z310)

摘　　要：复合腔法光纤激光器谐振腔结构灵活,可以根据需要构成各种结构实现纵模选择。但稳定性差是制约其应用的主要原因,为提高光纤激光器纵模选择的稳定性及抗干扰能力,在复合腔基础上提出"共腔结构"光纤激光器这一概念。分别采用传输矩阵和自由光谱范围(FSR)两种方法详细分析了"共腔结构"光纤激光器的特性,理论分析证明:共腔结构可有效增大FSR,有利于实现纵模选择和提高抗干扰能力。实验中采用保偏光纤搭建了"共腔结构"光纤激光器方案,通过调整保偏光纤长度得到了单波长和多波长激光。实验验证了上述理论,光纤激光器FSR随保偏光纤长度变化,证明共腔法是一种很好的纵模选择技术。Common resonant cavity fiber laser has a flexible structure and can easily design various structures to achieve longitudinal mode selection.However,poor stability is the main reason for restricting its application.In order to improve the stability and anti-jamming ability of fiber laser longitudinal mode selection,the concept of ＂common resonant cavity structure＂ was proposed based on compound cavity.The methods of transmission matrix and free spectral range（FSR） were adopted to analyze the properties of this structure respectively.Theoretical analysis shows that the structure can effectively increase FSR to achieve mode-locking operation and improve the anti-jamming capacity.The scheme of using polarization maintaining optical fiber（PMF） to set up this structure was proposed in experiments.Single-wavelength and multi-wavelength laser were obtained by adjusting the length of PMF.The theory is proved by the experiments and the law that the FSR of fiber laser changes along with the length of PMF is also verified,which indicates the potential use of common cavity structure in longitudinal mode choice.

关 键 词：光纤激光器 共腔结构 纵模选择 保偏光纤 

分 类 号：O436[机械工程—光学工程]