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可见光掺稀土光纤激光器研究进展:从连续波至飞秒脉冲(特邀)

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中国激光 2024年第1期51卷 25-43页

作者：罗正钱宋鲁明阮秋君福建省超快激光技术及应用重点实验室(厦门大学) 福建厦门361005 厦门大学深圳研究院广东深圳518129

位于人眼可见波段(380~780 nm)的激光,在显示、生物医疗、精密加工、精密光谱、光通信等领域有着重要的应用价值。在众多可见光激光的产生方法中,可见光掺稀土光纤激光器因具有高效率、高光束质量、结构简单且免维护等优势,近年来受到... 详细信息

位于人眼可见波段(380~780 nm)的激光,在显示、生物医疗、精密加工、精密光谱、光通信等领域有着重要的应用价值。在众多可见光激光的产生方法中,可见光掺稀土光纤激光器因具有高效率、高光束质量、结构简单且免维护等优势,近年来受到国内外的广泛关注。对可见光掺稀土光纤激光器的研究进展进行了详细综述,介绍了可见光连续波光纤激光器、可见光调Q脉冲光纤激光器及可见光锁模脉冲光纤激光器的产生方式和特点。最新研究进展表明,其可覆盖蓝(~480 nm)、青(~491 nm)、绿(~520 nm)、黄(~573 nm)、橙(~605 nm)、红(~635 nm)及深红(~717 nm)等丰富的可见光波长,全光纤可见光输出功率已迈向10 W,而且可见光锁模超短脉冲宽度已窄至<200 fs。结合应用需求,简要展望了可见光波段光纤激光器的发展趋势。

关键词：激光器可见光激光掺稀土光纤激光器连续波调Q 锁模

Direct generation of 3.17 mJ green pulses in a cavity-dumped Ho^(3+)-doped fiber laser at 543 nm

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Photonics Research 2023年第3期11卷 413-419页

作者： TIANRAN LI ZIYU WANG JINHAI ZOU JINFEN HONG qiujun ruan HANG WANG ZHIPENG DONG ZHENGQIAN LUO Fujian Key Laboratory of Ultrafast Laser Technology and Applications Xiamen UniversityXiamen 361005China Department of Electronic Engineering Xiamen UniversityXiamen 361005China Shenzhen Research Institute of Xiamen University Shenzhen 518129China Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province(IKKEM) Xiamen 361005China

High-energy pulsed lasers in the green spectral region are of tremendous interest for applications in space laser ranging,underwater detection,precise processing,and scientific *** pulsed lasers currently are difficult to access to the so-called“green gap,”and high-energy green pulsed lasers still heavily rely on the nonlinear frequency conversion of near-IR lasers,precluding compact and low-cost green laser ***,we address this challenge by demonstrating,for the first time to the best of our knowledge,millijoule-level green pulses generated directly from a fiber *** green pulsed fiber laser consists of a 450 nm pump laser diode,a Ho^(3+)-doped ZBLAN fiber,and a cavity-dumping module based on a visible wavelength acousto-optic *** pulse operation in the cavity-dumping regime at 543 nm is observed with a tunable repetition rate in a large range of 100 Hz–3 MHz and a pulse duration of 72–116 *** maximum pulse energy of 3.17 mJ at 100 Hz is successfully achieved,which is three orders of magnitude higher than those of the rare-earth-doped fiber green lasers previously *** work provides a model for compact,high-efficiency,and high-energy visible fiber pulsed lasers.

关键词： fiber laser pump

3.6 W compact all-fiber Pr3+-doped green laser at 521 nm

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Advanced Photonics 2022年第5期4卷 6-14页

作者： Jinhai Zou Jinfen Hong Zhuang Zhao Qingyuan Li qiujun ruan Hang Wang Yikun Bu Xianchao Guan Min Zhou Zhiyong Feng Zhengqian Luo Xiamen University School of Electronic Science and EngineeringFujian Key Laboratory of Ultrafast Laser Technology and ApplicationsXiamenChina Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province(IKKEM) XiamenChina Huawei Technologies Co. Ltd.ShenzhenChina Xiamen University Shenzhen Research InstituteShenzhenChina

Green semiconductor lasers are still undeveloped,so high-power green lasers have heavily relied on nonlinear frequency conversion of near-infrared lasers,precluding compact and low-cost green laser ***,we report the first Watt-level all-fiber CW Pr3t-doped laser operating directly in the green spectral region,addressing the aforementioned *** compact all-fiber laser consists of a double-clad Pr3t-doped fluoride fiber,two homemade fiber dichroic mirrors at visible wavelengths,and a 443-nm fiber-pigtailed pump *** from>10 MW∕cm2 high damage intensity of our designed fiber dielectric mirror,the green laser can stably deliver 3.62-W of continuous-wave power at∼521 nm with a slope efficiency of 20.9%.To the best of our knowledge,this is the largest output power directly from green fiber lasers,which is one order higher than previously ***,these green all-fiber laser designs are optimized by using experiments and numerical *** results are in excellent agreement with our experimental results and show that the optimal gain fiber length,output mirror reflectivity,and doping level should be considered to obtain higher power and *** work may pave a path toward compact high-power green all-fiber lasers for applications in biomedicine,laser display,underwater detection,and spectroscopy.

关键词： fiber laser high power Pr3+-doped fiber green light

New ultrashort pulsewidth measurement technology based on interference jitter and FPGA platform

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Chinese Optics Letters 2022年第3期20卷 46-51页

作者： Jin Li Yanbo Dou Lixin Wang Jinhai Zou Yu Ding Hang Wang qiujun ruan Zhipeng Dong Zhengqian Luo Department of Electronic Engineering Xiamen UniversityXiamen 361005China Science and Technology on Electro-Optical Information Security Control Laboratory Tianjin 300308China

Conventional ultrashort pulsewidth measurement technology is autocorrelation based on second-harmonic generation;however,nonlinear crystals and bulky components are required,which usually leads to the limited wavelength range and the difficult adjustment with free-space light ***,we proposed a compact all-fiber pulsewidth measurement technology based on the interference jitter(IJ)and field-programmable gate array(FPGA)platform,without requiring a nonlinear optical device(*** crystal/detector).Such a technology shows a wide measurement waveband from 1 to 2.15μm at least,a pulsewidth range from femtoseconds to 100 ps,and a small relative error of 0.15%-3.8%.In particular,a minimum pulse energy of 219 fj is experimentally detected with an average-power-peak-power product of 1.065×10^(-6)W^(2).The IJ-FPGA technology may offer a new route for miniaturized,user-friendly,and broadband pulsewidth measurement.

关键词： pulse width measurement interference jitter FPGA platform optical device

<100 fs全光纤束缚态耗散孤子被动锁模激光器

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激光与光电子学进展 2021年第11期58卷 257-262页

作者：钟敏林小平阮秋君王航胡志杰傅昱黄凤珊黄柳苹周慧莉罗正钱国网福建省电力有限公司漳州供电公司福建漳州363000 厦门大学电子科学与技术学院(国家示范性微电子学院) 福建厦门361005

报道了全光纤耗散孤子被动锁模掺铒光纤激光器,通过调节泵浦功率和偏振态可以进一步获得2孤子和3孤子的束缚态耗散孤子。利用反常色散光纤对宽带2孤子束缚态耗散孤子进行脉宽压缩,压缩后的脉宽用双曲正割拟合为96 fs,计算得时间带宽积为... 详细信息

报道了全光纤耗散孤子被动锁模掺铒光纤激光器,通过调节泵浦功率和偏振态可以进一步获得2孤子和3孤子的束缚态耗散孤子。利用反常色散光纤对宽带2孤子束缚态耗散孤子进行脉宽压缩,压缩后的脉宽用双曲正割拟合为96 fs,计算得时间带宽积为0.324,表明其为近转换极限脉冲。宽带光谱的获得得益于腔内的色散管理和碳纳米管可饱和吸收体的大调制深度(20%)。在此基础上,获得了光谱宽度达35 nm的耗散孤子(中心波长为1.57μm),这也是基于碳纳米管产生耗散孤子的最宽光谱。

关键词：激光光学超快非线性光学脉冲压缩锁模激光器束缚态孤子

铁过载对重型地中海贫血儿童患者外周血造血干细胞动员效果的影响

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中国小儿血液与肿瘤杂志 2022年第6期27卷 372-378页

作者： Bindanda Mvuama Van Timothee 杜晶任玉琼何岳林阮永胜刘璇赵娜娜陈丽白温建芸丁蓉芳俞莉刘秋君刘晓婷廖建云彭智勇吴学东李春富冯晓勤南方医科大学南方医院儿科广州510515 广东省东莞市南方春富(儿童)血液病研究院东莞523128

目的研究铁过载对β-重型地中海贫血(TM)儿童患者外周血干细胞(PBSC)动员效果的影响。方法回顾性分析2012年1月—2019年12月本中心218例重型地中海贫血(TM)患者采集外周血造血干细胞(PBSC)的相关数据。采集PBSC前通过检测血清铁蛋白水... 详细信息

目的研究铁过载对β-重型地中海贫血(TM)儿童患者外周血干细胞(PBSC)动员效果的影响。方法回顾性分析2012年1月—2019年12月本中心218例重型地中海贫血(TM)患者采集外周血造血干细胞(PBSC)的相关数据。采集PBSC前通过检测血清铁蛋白水平及磁共振成像(MRI)T2*方法检测肝脏和心脏的铁负荷,评估TM患者铁过载程度。TM患者注射重组人粒细胞集落刺激因子5d后采用自动单个核细胞分离程序采集PBSC,分析铁过载与动员后外周血白细胞数、单个核细胞数、CD34+细胞数的相关性。结果TM患者的平均年龄为(7.35±3.41)岁。基于铁蛋白水平的铁过载分度,TM患者外周血干细胞相关计数在轻、中、重型三组间未见显著差异。218例TM患者中171例接受了MRI T2*检测。中重度肝脏铁过载组白细胞分离产物WBC计数和单个核细胞计数显著降低(均P<0.05)。171例患者中,152例心脏铁过载MRI T2*水平正常,不同程度的心脏铁过载患者的外周血干细胞计数未见显著差异。结论在TM患者中,中重度肝脏铁过载与PBSC动员效果较差相关。在行PBSC采集术前,通过积极螯合治疗减少肝脏铁过载可能改善PBSC的动员效果,心脏铁过载对PBSC动员的影响需通过进一步扩大样本量进行充分评估。

关键词：外周血干细胞重型地中海贫血动员铁过载