Mode suppression employing periodical large-small-core (PLSC) filter in strongly pumped large mode area fiber amplifier

CORC > 上海光学精密机械研究所 > 中国科学院上海光学精密机械研究所 > 空间激光信息技术研究中心

	Mode suppression employing periodical large-small-core (PLSC) filter in strongly pumped large mode area fiber amplifier
	Zheng, Ye; Li, Xiaojun; Peng, Biao; Zhou, Jun; He, Bing; Qi, Yunfeng; Zhao, Chun; Liu, Kai; Yang, Yifeng; Chen, Xiaolong
刊名	J. Opt.
	2017
卷号	19 期号:6
通讯作者	dreamer_7@siom.ac.cn ; junzhousd@siom.ac.cn
英文摘要	Mode instability (MI) has become one of the main restrictions for further power scaling of large mode area (LMA) fiber systems. A periodical large-small-core (PLSC) filter in a strongly pumped LMA fiber amplifier based on multimode interference and self-imaging effect is proposed to suppress high order modes and improve the beam quality. An investigation on the modeling of light propagation within this filter structure is presented. Transverse mode competition and individual transverse mode power distribution in a strongly pumped fiber amplifier are theoretically analyzed. By employing this PLSC mode filter in the 30/400 strongly pumped LMA fiber amplifier, the percentage of the fundamental mode rises from 27.8% (without filter) to 95.6%, and the percentage of the high order modes correspondingly reduces from 72.2% (without filter) to 4.4%. By the modal power decomposition, the optical field pattern in free space is established and the M-2 parameter of beam quality decreases dramatically from 2.24 to 1.12 (0 relative phase) and from 3.01 to 1.28 (pi/2 relative phase). This study provides a new method to achieve high beam quality in LMA fiber amplifiers and this filter would be extended to larger mode area fiber amplifiers.
收录类别	SCI
资助信息	National Key Research and Development Program [2016YFB0402201]; NSAF Foundation of National Natural Science Foundation of China [U1330134]; National Natural Science Foundation of China [61308024]; Natural Science Foundation of Shanghai [16ZR1440100, 16ZR1440200]; Key Technologies R&D Program of Jiangsu [BE2014001]
WOS记录号	WOS:000400913500001
内容类型	期刊论文
源URL	[http://ir.siom.ac.cn/handle/181231/28399]
专题	上海光学精密机械研究所_空间激光信息技术研究中心
作者单位	中国科学院上海光学精密机械研究所
推荐引用方式 GB/T 7714	Zheng, Ye,Li, Xiaojun,Peng, Biao,et al. Mode suppression employing periodical large-small-core (PLSC) filter in strongly pumped large mode area fiber amplifier[J]. J. Opt.,2017,19(6).
APA	Zheng, Ye.,Li, Xiaojun.,Peng, Biao.,Zhou, Jun.,He, Bing.,...&Zhao, Xiang.(2017).Mode suppression employing periodical large-small-core (PLSC) filter in strongly pumped large mode area fiber amplifier.J. Opt.,19(6).
MLA	Zheng, Ye,et al."Mode suppression employing periodical large-small-core (PLSC) filter in strongly pumped large mode area fiber amplifier".J. Opt. 19.6(2017).