Gaussian-Shaped Gain-Dopant Distributed Fiber for High Output Power Fiber Amplifier
The remarkable evolution of ytterbium-doped fiber (YDF) lasers and amplifiers is interrupted by a limiting thermo-optical effect called transverse mode instability (TMI). Hereon, we propose a Gaussian-shaped gain-dopant distributed (GSGDD) YDF, which is fabricated by a modified chemical vapor deposi...
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Published in | IEEE photonics journal Vol. 13; no. 4; pp. 1 - 6 |
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Main Authors | , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Piscataway
IEEE
01.08.2021
The Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
Subjects | |
Online Access | Get full text |
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Summary: | The remarkable evolution of ytterbium-doped fiber (YDF) lasers and amplifiers is interrupted by a limiting thermo-optical effect called transverse mode instability (TMI). Hereon, we propose a Gaussian-shaped gain-dopant distributed (GSGDD) YDF, which is fabricated by a modified chemical vapor deposition (MCVD) process combined with solution doping technique (SDT). By regulating the solution concentrations of soot layers, the content of Yb 3+ ions presents Gaussian-shaped distribution in the transverse direction while the refractive index profile (RIP) exhibits a stepped profile. The laser performance of this fiber is verified by a bidirectional pumped master oscillator power amplifier (MOPA). Over 3 kW near-single-mode laser output is obtained with the slope efficiency of 84.9%. At the highest power output, there are no Stokes light components in the spectrum and the beam quality M 2 factor is ∼1.45 These results suggest that the GSGDD fiber owns great potential to achieve high power output with excellent beam quality. |
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ISSN: | 1943-0655 1943-0655 1943-0647 |
DOI: | 10.1109/JPHOT.2021.3096716 |