Single transverse mode laser in a center-sunken and cladding-trenched Yb-doped fiber | Zendy

Yehui Liu | Zendy; Fangfang Zhang | Zendy; Nan Zhao | Zendy; Xianfeng Lin | Zendy; Lei Liao | Zendy; Yibo Wang | Zendy; Jinggang Peng | Zendy; Haiqing Li | Zendy; Lüyun Yang | Zendy; Nengli Dai | Zendy; Jinyan Li | Zendy

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Single transverse mode laser in a center-sunken and cladding-trenched Yb-doped fiber

Author(s) -

Yehui Liu,

Fangfang Zhang,

Nan Zhao,

Xianfeng Lin,

Lei Liao,

Yibo Wang,

Jinggang Peng,

Haiqing Li,

Lüyun Yang,

Nengli Dai,

Jinyan Li

Publication year - 2018

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.26.003421

Subject(s) - materials science , cladding (metalworking) , fiber laser , optics , doping , chemical vapor deposition , laser , bend radius , plastic clad silica fiber , all silica fiber , fiber , optoelectronics , dispersion shifted fiber , bending , composite material , fiber optic sensor , physics

We report a novel center-sunken and cladding-trenched Yb-doped fiber, which was fabricated by a modified chemical vapor deposition process with a solution-doping technique. The simulation results showed that the fiber with a core diameter of 40 µm and a numerical aperture of 0.043 has a 1217 µm 2 effective mode area at 1080 nm. It is also disclosed that the leakage loss can be reduced lower than 0.01 dB/m for the LP 01 mode, while over 80 dB/m for the LP 11 mode by optimizing the bending radius as 14 cm. A 456 W laser output was observed in a MOPA structure. The laser slope efficiency was measured to be 79% and the M 2 was less than 1.1, which confirmed the single mode operation of the large mode area center-sunken cladding-trenched Yb-doped fiber.

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