Power scaling of single-frequency ytterbium-doped fiber master-oscillator power-amplifier sources up to 500 W

被引：240

作者：

Jeong, Yoonchan ^{[1
]}

Nilsson, Johan ^{[1
]}

Sahu, Jayanta K. ^{[1
]}

Payne, David N. ^{[1
]}

Horley, R. ^{[1
]}

Hickey, L. M. B. ^{[1
]}

Turner, P. W. ^{[1
]}

机构：

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

来源：

IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS | 2007年 / 13卷 / 03期

关键词：

optical fiber amplifiers; optical fiber lasers; Brillouin scattering; ytterbium;

D O I：

10.1109/JSTQE.2007.896639

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

We discuss continuous-wave single-frequency masteroscillator power-amplifier (MOPA) sources based on ytterbium-doped fibers (YDFs) with particular attention to their recent advances and our experimental results. This includes a 402-W plane-polarized MOPA source and a 511-W random-polarized MOPA source. In these MOPAs, the final-stage high-power amplifier operates with high efficiency of 70%-80%, and a high gain of over 20 dB in a near diffraction-limited beam. We report at least 7-dB enhancement of the stimulated Brillouin scattering (SBS) threshold for the 402-W polarization-maintaining (PM) YDF. In fact, we did not see any sign of SBS even at the highest output power. We eventually observed SBS appearance at around 500 W for the non-PM YDF. The observed SBS strengths were far weaker than expected in theory, unless we allowed for the Brillouin gain reduction from thermal Brillouin gain broadening induced by the quantum-defect heating.

引用

页码：546 / 551

页数：6

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