An actively Q-switched fiber laser with cylindrical vector beam generation. (14th February 2018)

• Record Type: Journal Article
• Authors: Zhang, Jiaojiao; Zhang, Zuxing; Cai, Yu; Wan, Hongdan; Wang, Zhiqiang; Zhang, Lin
• Is Part Of: Laser physics letters. Volume 15:Number 3(2018:Mar.)
• Publication Date: 2018-02-14
• Subjects: Q-switching -- cylindrical vector beam -- fiber Bragg grating; Lasers -- Periodicals; Physics -- Periodicals; 621.366
• DOI: 10.1088/1612-202X/aaa335
• Languages: English
• ISSNs: 1612-2011

Abstract

Abstract: We demonstrate an actively Q-switched fiber laser with cylindrical vector beam (CVB) emission using a few-mode fiber Bragg grating as the mode selection component and an acousto-optic modulator to achieve Q-switching. To the best of our knowledge, this is the first such demonstration. Using a linear cavity configuration, an actively Q-switched CVB with a pulse width of about 64 ns, a pulse energy of 4.25 µ J and a repetition rate of 20 kHz has been obtained. Moreover, by tuning the polarization controllers radially and azimuthally, polarized Q-switched beams can be excited separately with a polarization purity of >94.5%. This compact Q-switched fiber laser with ns CVB pulse output could find potential applications in the field of material processing, nonlinear optics and so on.