Highly efficient Yb-free Er-La-Al doped ultra-low NA large mode area single-trench fiber laser

被引：24

作者：

Jain, D. ^{[1
]}

Alam, S. ^{[1
]}

Jung, Y. ^{[1
]}

Barua, P. ^{[1
]}

Velazquez, M. N. ^{[1
]}

Sahu, J. K. ^{[1
]}

机构：

[1] Univ Southampton, Optoelect Res Ctr, Southampton SO17 1BJ, Hants, England

来源：

OPTICS EXPRESS | 2015年 / 23卷 / 22期

基金：

英国工程与自然科学研究理事会;

关键词：

POWER; AMPLIFIERS; NM;

D O I：

10.1364/OE.23.028282

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We demonstrate a 60 mu m core diameter Yb free Er-La-Al doped single-trench fiber having a 0.038 ultra-low-NA, fabricated using conventional MCVD process in conjunction with solution doping technique. Numerical simulations predict an effective single mode operation with effective area varying from 1,820 mu m(2) to 1,960 mu m(2) (taking bend-induced modal distortion into account) for different thicknesses of trenches and resonant rings at a constant bend radius of 25cm. Moreover, all solid structure favors easy cleaving and splicing. Experimental measurements demonstrate a robust effective single mode operation. Furthermore, with a 4%-4% laser cavity, this fiber shows a record efficiency of 46% with respect to the absorbed pump power. (C) 2015 Optical Society of America

引用

页码：28282 / 28287

页数：6

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