Spatial mode switchable fiber laser based on FM-FBG and random distributed feedback

被引:26
作者
Du, Xueyuan [1 ]
Zhang, Hanwei [1 ]
Ma, Pengfei [1 ]
Wang, Xiaolin [1 ]
Zhou, Pu [1 ]
Liu, Zejin [1 ]
机构
[1] Natl Univ Def Technol, Coll Optoelect Sci & Engn, Changsha 410073, Hunan, Peoples R China
基金
中国国家自然科学基金;
关键词
fiber laser; laser mode; random distributed feedback; STIMULATED BRILLOUIN-SCATTERING; CYLINDRICAL VECTOR BEAMS; LOW-THRESHOLD; RAYLEIGH FEEDBACK; OPTICAL-FIBERS; MIRROR; CAVITY;
D O I
10.1088/1054-660X/25/9/095102
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
We demonstrate an all-fiber laser capable of realising switchable spatial mode output, by utilising a few-mode fiber Bragg grating and random distributed feedback (RDFB). An offset splicing spot is used to assist the efficient exciting of higher order modes, and the laser output can be freely switched between the LP01 and LP11 modes by adjusting the polarisation controllers. The intensity distribution of the laser output beam profile, along with its spectral evolution and temporal characteristics has been investigated. To the best of our knowledge, this is the first spatial mode switchable RDFB fiber laser which may broaden the scope of the random fiber laser.
引用
收藏
页数:5
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