Open AccessAll-fiber high-order mode laser using a metal-clad transverse mode filter
Author(s) -
Yimin Zhang,
Hongxun Li,
Chao Dai,
Lixin Xu,
Changzhi Gu,
Wei Chen,
Yonggang Zhu,
Peijun Yao,
Qiwen Zhan
Publication year - 2018
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.26.029679
Subject(s) - materials science , optics , fiber laser , laser linewidth , polarization controller , mode volume , transverse mode , laser , mode scrambler , fiber bragg grating , polarization maintaining optical fiber , single mode optical fiber , optoelectronics , optical fiber , radiation mode , wavelength , fiber optic sensor , physics
We propose and demonstrate an all-fiber laser with LP 11 mode output. A transverse mode filter is designed and fabricated to suppress the fundamental mode and enable the fiber laser to oscillate in the second-order (LP 11 ) transverse mode. The mechanism is to introduce relatively low ohmic loss for the TE 01 mode and much higher ohmic losses for other modes through the loss of evanescent waves in the metal clad. The fiber laser operates at the center wavelength of 1053.9 nm with a narrow 3 dB linewidth of 0.019 nm. Four states of cylindrical vector mode with high modal purity are obtained through adjusting the intra-cavity polarization controller. This approach has great potentiality and scalability of realizing single high-order mode fiber laser, from which a wide range of applications could benefit.