2 kW average power from a pulsed Yb-doped rod-type fiber amplifier

被引：61

作者：

Otto, Hans-Juergen ^{[1
]}

Stutzki, Fabian ^{[1
]}

Modsching, Norbert ^{[1
]}

Jauregui, Cesar ^{[1
]}

Limpert, Jens ^{[1
,2
]}

Tuennermann, Andreas ^{[1
,2
,3
]}

机构：

[1] Univ Jena, Abbe Ctr Photon, Inst Appl Phys, D-07745 Jena, Germany

[2] Helmholtz Inst Jena, D-07743 Jena, Germany

[3] Fraunhofer Inst Appl Opt & Precis Engn, D-07745 Jena, Germany

来源：

OPTICS LETTERS | 2014年 / 39卷 / 22期

基金：

欧洲研究理事会;

关键词：

MODE-INSTABILITIES; OUTPUT POWER; LASERS; THRESHOLD;

D O I：

10.1364/OL.39.006446

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

This Letter reports on a fiber-laser system that, employing a 1 m long rod-type photonic-crystal fiber as its main-amplifier, emits a record average output power of 2 kW, by amplifying stretched ps-pulses. A further increase of the output power was only limited by the available laser-diode pump power. The energy of the pulses is 100 mu J, corresponding to MW-level peak powers extracted directly from the fiber of the main amplifier. The corresponding M-2 at the maximum output power is <3, due to the onset of mode instabilities. The Letter covers the influence of this effect on the evolution of the beam quality with the output power. The numerical results show that the M-2 value settles at around 3, even if the output average power is further increased. (C) 2014 Optical Society of America

引用

页码：6446 / 6449

页数：4

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