Near-diffraction-limited operation of step-index large-mode-area fiber lasers via gain filtering

被引：51

作者：

Marciante, John R. ^{[1
]}

Roides, Richard G. ^{[1
]}

Shkunov, Vladimir V. ^{[2
]}

Rockwell, David A. ^{[2
]}

机构：

[1] Univ Rochester, Laser Energet Lab, Rochester, NY 14623 USA

[2] Raytheon Space & Airborne Syst, El Segundo, CA 90245 USA

来源：

OPTICS LETTERS | 2010年 / 35卷 / 11期

关键词：

HIGHER-ORDER MODES; DOPED FIBER; OPTICAL-FIBERS;

D O I：

10.1364/OL.35.001828

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We present, for the first time to our knowledge, an explicit experimental comparison of beam quality in conventional and confined-gain multimode fiber lasers. In the conventional fiber laser, beam quality degrades with increasing output power. In the confined-gain fiber laser, the beam quality is good and does not degrade with output power. Gain filtering of higher-order modes in 28 mu m diameter core fiber lasers is demonstrated with a beam quality of M(2) = 1.3 at all pumping levels. Theoretical modeling is shown to agree well with experimentally observed trends. (C) 2010 Optical Society of America

引用

页码：1828 / 1830

页数：3

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