All-fiber cylindrical vector beams laser based on an acoustically-induced fiber grating. (20th June 2018)

• Record Type: Journal Article
• Authors: Zhang, Xuecheng; Zhang, Wending; Li, Chenyang; Mao, Dong; Gao, Feng; Huang, Ligang; Yang, Dexing; Mei, Ting; Zhao, Jianlin
• Is Part Of: Journal of optics. Volume 20:Number 7(2018:Jul.)
• Publication Date: 2018-06-20
• Subjects: fiber laser -- cylindrical vector beam -- vector mode coupling -- acousto-optic coupling; Optics -- Periodicals; 535.05
• DOI: 10.1088/2040-8986/aaca1c
• Languages: English
• ISSNs: 2040-8978

Abstract

Abstract: We presented a method to construct an all-fiber laser by using an acoustically-induced fiber grating (AIFG) in two-mode fiber (TMF) within the laser cavity to generate cylindrical vector beams (CVBs) in communication band. Based on the polarization dependent vector mode coupling characteristic of an AIFG, the CVBs were generated by respectively coupling HE 11 x and HE 11 y modes to TM01 and TE01 modes, which have radial and azimuthal polarizations characteristics, respectively. The output of the all-fiber laser could be adjusted from a linearly-polarized Gaussian mode to a radially or an azimuthally polarized vector mode through a polarization controller to adjust the linear polarization direction of the input mode of H 11 x / y and an acoustic flexural wave applied on TMF. This work provides a method for generating CVBs with convenient mode conversion characteristics.