1.2 kW quasi-steady-state diamond Raman laser pumped by an M2=15 beam

被引：51

作者：

Antipov, Sergei ^{[1
]}

Sabella, Alexander ^{[2
]}

Williams, Robert J. ^{[1
]}

Kitzler, Ondrej ^{[1
]}

Spence, David J. ^{[1
]}

Mildren, Richard P. ^{[1
]}

机构：

[1] Macquarie Univ, MQ Photon Res Ctr, Dept Phys & Astron, Sydney, NSW 2109, Australia

[2] Def Sci & Technol Grp, Edinburgh, SA 5111, Australia

来源：

OPTICS LETTERS | 2019年 / 44卷 / 10期

基金：

澳大利亚研究理事会;

关键词：

POWER FIBER LASERS; BRIGHTNESS ENHANCEMENT; WAVELENGTH CONVERSION; FREQUENCY-CONVERSION;

D O I：

10.1364/OL.44.002506

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

An external cavity diamond Raman laser with 1.2 kW output power is demonstrated for durations 7 times longer than the thermal lens time constant. An 83% slope efficiency and a 53% optical-to-optical efficiency were obtained for conversion from a 1.06 mu m pump to the 1.24 mu m first Stokes. The pump had an M-2 of 15, demonstrating that efficiency is maintained at the highest levels even when using exceptionally poor quality pumps. We show that a measured decrease in the output beam quality factor from M-2 = 2.95 to M-2 = 1.25 as power increased is evidence for thermal lens development in the diamond. The results foreshadow development of continuous-wave kilowatt-class lasers or amplifiers based on single diamond elements and pumped efficiently by lasers having poor spatial coherence such as line-narrowed diode laser arrays. (C) 2019 Optical Society of America

引用

页码：2506 / 2509

页数：4

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