Author Affiliations
Abstract
1 College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, China
2 Key Laboratory of Specialty Fiber Optics and Optical Access Networks, Joint International Research Laboratory of Specialty Fiber Optics and Advanced Communication, Shanghai Institute for Advanced Communication and Data Science, Shanghai University, Shanghai 200444, China
An all-fiberized random distributed feedback Raman fiber laser (RRFL) with mode output at 1134 nm has been demonstrated experimentally, where an intracavity acoustically induced fiber grating is employed for modal switching. The maximum output power of mode is 93.8 W with the modal purity of 82%, calculated by numerical mode decomposition technology based on stochastic parallel-gradient descent algorithm. To our best knowledge, this is the highest output power with high purity of mode generated from the RRFL. This work may pave a path towards advanced fiber lasers with special temporal and spatial characteristics for applications.
acoustically induced fiber grating LP11 mode mode decomposition random distributed feedback Raman fiber laser Chinese Optics Letters
2023, 21(2): 021406
1 国防科技大学前沿交叉学科学院, 湖南 长沙 410073
2 脉冲激光技术国家重点实验室, 安徽 合肥 230037
利用随机光纤激光器结构对产生覆盖可见光至近红外波段的超连续谱进行了研究。实验采用半开腔的随机激光腔体结构,腔内利用千米量级的掺锗光纤提供随机分布反馈和拉曼增益,同时利用掺镱光纤提供主动增益,最终实现了光谱范围覆盖600~1700 nm、同时20 dB光谱带宽大于660 nm的超连续谱输出。实验结果表明,随机光纤激光器作为一种新型超连续谱光源,可用于多种对稳健性和性价比有较高要求的应用场合。
激光器 光纤激光 随机激光 超连续谱 随机分布反馈 光学学报
2019, 39(11): 1136001
中国计量学院 光学与电子科技学院, 杭州 310018
设计了一种基于受激布里渊散射和掺铒光纤混合增益的随机光纤激光器，该激光器选用两段长为20 km的单模光纤组成全开放腔结构，利用单模光纤的瑞利散射提供随机光反馈.研究表明，固定布里渊泵浦波长和泵浦功率分别为1 550.00 nm和2.19 mW时，增加掺铒光纤泵浦功率，可以实现两个波长的随机激光输出，一阶和二阶受激布里渊散射光与布里渊泵浦光波长间隔分别约为0.088 nm和0.174 nm，产生一阶和二阶受激布里渊散射对应的掺铒光纤泵浦功率分别为190 mW和370 mW；当掺铒光纤泵浦功率为433 mW时，激光器两端的最大输出功率为1.60 mW和1.68 mW.当掺铒光纤泵浦功率明显高于阈值功率时，获得的一阶和二阶随机激光输出稳定，3 dB线宽约为0.022 nm，峰值强度和位置基本不随时间而变化.
光纤激光器 受激布里渊散射 瑞利散射 掺铒光纤 随机分布反馈 混合增益 线宽 Fiber laser Stimulated Brillouin scattering Rayleigh scattering Erbium-doped fiber Random distributed feedback Hybrid gains Linewidth
