All-fiber single-longitudinal-mode narrow linewidth fiber ring laser with cylindrical vector beam output

作者：Yao, Shuzhi^*; Yang, Yuguang; Shen, Ya; Han, Wenguo; Jiang, Youchao; Jian, Shuisheng

来源：Laser Physics Letters, 2018, 15(11): 115107.

DOI：10.1088/1612-202X/aae220

• optical fiber lasers
• optical polarization
• fiber Bragg grating
• single-longitudinal-mode

A single-longitudinal-mode (SLM) fiber ring laser with cylindrical vector beam (CVB) output is experimentally demonstrated. Mode selection and spectrum filtering are achieved by introducing a two-mode fiber Bragg grating (TM-FBG) as an output mirror simultaneously. The SLM operation is obtained by using a compound ring cavity laser structure together with an un-pumped EDF acting as a saturable absorber. The fiber laser operates at a single wavelength of 1545.99 nm with a 20 dB linewidth of about 7.1 kHz and an optical signal to noise ratio of more than 68 dB. Through adjusting the intra-cavity polarization controllers, stable narrow linewidth radially and azimuthally polarized CVBs are both obtained.

• 出版日期2018-11
• 单位北京交通大学