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高功率脉冲激光二极管
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《光机电信息》 2003年第1期44-44,共1页
关键词 高功率脉冲激光二极管 时间成像光谱 激光层析X射线摄影
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高能量脉冲Tm:YAG激光器研究
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作者 张奥 姚育成 +2 位作者 朱晓峰 叶君竹 王子怡 《激光杂志》 CAS 北大核心 2024年第10期33-38,共6页
报道了适合于医疗应用的高能量脉冲激光二极管(LD)泵浦Tm:YAG激光器,通过理论模拟和试验研究了脉冲Tm:YAG激光器振荡运转和输出特性,结果显示:Tm:YAG激光器在脉冲泵浦状态下产生剧烈的驰豫振荡,可输出高峰值功率子脉冲,用适当重复频率... 报道了适合于医疗应用的高能量脉冲激光二极管(LD)泵浦Tm:YAG激光器,通过理论模拟和试验研究了脉冲Tm:YAG激光器振荡运转和输出特性,结果显示:Tm:YAG激光器在脉冲泵浦状态下产生剧烈的驰豫振荡,可输出高峰值功率子脉冲,用适当重复频率泵浦时,多脉冲泵浦反转粒子的叠加效应可显著提高单脉冲输出能量,低频脉冲运转时,激光器阈值高,不利于激光器输出。实验中在重复频率120 Hz、脉宽600μs情况下,输出最大激光能量476 mJ,光光效率26.4%;在泵浦平均功率300 W时,得到68.2 W的平均功率输出,光光效率22.7%。此高能量脉冲2μm激光输出实验,为激光医疗应用提供参考。 展开更多
关键词 Tm:YAG激光 脉冲激光二极管 脉冲能量 驰豫振荡 脉冲
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基于脉冲激光二极管辐射源的光声成像系统 被引量:1
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作者 曾吕明 刘国栋 +1 位作者 杨迪武 纪轩荣 《中国激光》 EI CAS CSCD 北大核心 2013年第B12期106-111,共6页
采用具有价格低、体积小、结构紧凑、重复率高等优点的脉冲激光二极管,搭建了一套C扫描模式的光声成像系统,并采用三维可视化光声重建技术,获得了被测样品的二维和三维光声影像。实验中,系统采用前向模式接收光声信号,激光二极管... 采用具有价格低、体积小、结构紧凑、重复率高等优点的脉冲激光二极管,搭建了一套C扫描模式的光声成像系统,并采用三维可视化光声重建技术,获得了被测样品的二维和三维光声影像。实验中,系统采用前向模式接收光声信号,激光二极管和超声探测器保持相对位置不变。实验结果表明,该成像系统横向分辨率为0.5mm,光声信噪比可达20.6dB,A扫描速度为0.16s/div。该激光二极管的单脉冲能量低至14砧,整体体积只有10cm×3cm×3cm,有望发展成为一种低成本、实时、便携式的生物组织无损光声成像系统。 展开更多
关键词 生物光学 光声成像 脉冲激光二极管 三维图像重建
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脉冲激光器大电流窄脉冲驱动设计 被引量:23
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作者 陈伟 苗琪媚 +1 位作者 孙峰 赵翔 《强激光与粒子束》 EI CAS CSCD 北大核心 2010年第6期1223-1228,共6页
介绍了利用金属氧化物场效应管产生大电流窄脉冲来驱动激光二极管的原理,推导出驱动金属氧化物场效应管峰值驱动电流的计算公式和开通时间的估算公式,通过仿真总结出影响驱动电源脉冲电流的脉宽、幅度和振荡的主要因素,理论和仿真结果表... 介绍了利用金属氧化物场效应管产生大电流窄脉冲来驱动激光二极管的原理,推导出驱动金属氧化物场效应管峰值驱动电流的计算公式和开通时间的估算公式,通过仿真总结出影响驱动电源脉冲电流的脉宽、幅度和振荡的主要因素,理论和仿真结果表明,器件的寄生电感、电路走线电感和负载寄生电感对电流影响较大。实验结果显示,在供电高压为200 V时,金属氧化物场效应管开通时间为2 ns;激光二极管驱动电流上升时间小于10 ns,脉宽为15~100 ns,幅度为0-50 A连续可调,频率为0-50 kHz。 展开更多
关键词 脉冲激光二极管 金属氧化物场效应管 驱动电源 驱动电流 开通时间
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激光引信发射组件M^2因子的测试研究 被引量:1
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作者 陈正熙 陈海清 +2 位作者 薛松 李靓 田玉敏 《光学与光电技术》 2007年第5期43-45,52,共4页
激光引信发射组件中,由于线性阵列激光二极管的光斑是由若干激光二极管的光斑叠加而成,其M2因子的测量不能简单地按照单个激光二极管M2因子的方法进行测量。以ISO11146标准中的二阶矩法为基础,使用CCD采集聚焦后的光斑图像,并对光斑图... 激光引信发射组件中,由于线性阵列激光二极管的光斑是由若干激光二极管的光斑叠加而成,其M2因子的测量不能简单地按照单个激光二极管M2因子的方法进行测量。以ISO11146标准中的二阶矩法为基础,使用CCD采集聚焦后的光斑图像,并对光斑图像进行分块处理,从而得到激光引信发射组件的M2因子。 展开更多
关键词 激光引信 M^2因子 线性阵列脉冲激光二极管 二阶矩
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Pulsed Laser Diodes in the Mid-IR
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《光机电信息》 2006年第6期60-60,共1页
关键词 脉冲激光二极管 中红外线 激光技术 生产线
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Generation of low jitter and discrete tunable dual-wavelength optical pulses at arbitrary repetition rates 被引量:1
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作者 ZHANG Ming-jiang WANG Yun-cai 《Optoelectronics Letters》 EI 2006年第4期246-248,共3页
A novel and simple method to generate low timing jitter and discrete tunable dual-wavelength optical pulses at arbitrary repetition rates is demonstrated in this paper.Two multiple quantum wells distributed feedback l... A novel and simple method to generate low timing jitter and discrete tunable dual-wavelength optical pulses at arbitrary repetition rates is demonstrated in this paper.Two multiple quantum wells distributed feedback laser diodes,were used as the external seeding sources to inject the external photons into a gain-switched Fabry-Perot laser diode.The output wavelengths can be tuned discretely to coincide with any two lasing modes in the gain spectra range of the Fabry-Perot Laser diode,and the output side mode suppression ratio was better than 25 dB.Moreover,the timing jitter of optical pulses was reduced from 1.89 ps to 0.83 ps.It was empirically found that the lowest timing jitter operation occurred when the injected light wavelength is 0.2-0.3 nm shorter than the locked mode of the Fabry-Perot laser diode.To our knowledge,this is the first report of using two DFB laser diodes as a seeding source to reduce pulses jitter and select lasing dual-wavelength simultaneously. 展开更多
关键词 光学脉冲 离散性 波长 重复率 激光二极管
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Laser diode drive method with narrow-width and high-peak current for multi-line LIDAR 被引量:2
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作者 LI Xu DUAN Fa-jie +3 位作者 MA Ling WANG Xian-quan JIANG Jia-jia FU Xiao 《Journal of Measurement Science and Instrumentation》 CAS CSCD 2019年第3期246-253,共8页
Light detection and ranging (LIDAR) based on time of flight (TOF) method is widely used in many fields related to distance measurement. LIDAR generally uses laser diode (LD) to emit the pulsed laser with high peak pow... Light detection and ranging (LIDAR) based on time of flight (TOF) method is widely used in many fields related to distance measurement. LIDAR generally uses laser diode (LD) to emit the pulsed laser with high peak power and short duration to ensure a large distance measurement range and eye safety. To achieve this goal, we propose a pulsed LD drive method producing the drive current with high peak and narrow pulse width. We analyze the key issues and related theories of the drive current generation based on this method and design an LD driver. A model of drive current generation is established and the influence of operating frequency on drive current is discussed. The LD driver is simulated by software and verified by experiments. The working frequency of the driver changes from 20 kHz to 100 kHz and the charging voltage is set at 130 V. The current produced by this driver has a duration of 8.8 ns and a peak of about 35 A, and the peak output optical power of the LD exceeds 75 W. 展开更多
关键词 light detection and ranging(LIDAR) distance measurement laser diode (LD) driver pulsed current
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Graphdiyne as a saturable absorber for 2-µm all-solid-state Q-switched laser 被引量:1
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作者 Yuqian Zu Jia Guo +4 位作者 Qianqian Hao Feng Zhang Cong Wang Jie Liu Bing Wang 《Science China Materials》 SCIE EI CSCD 2021年第3期683-690,共8页
As a novel one-atom-thick carbon allotrope,graphdiyne(GDY)has attracted wide interest in two-dimensional materials owing to its unique feature with a planar layer comprising sp2-and sp-hybridized carbon atoms and a di... As a novel one-atom-thick carbon allotrope,graphdiyne(GDY)has attracted wide interest in two-dimensional materials owing to its unique feature with a planar layer comprising sp2-and sp-hybridized carbon atoms and a direct natural bandgap.A high-quality saturable absorber(SA)based on GDY was successfully fabricated,and the nonlinear saturable absorption properties were investigated.A compact diode-pumped solid-state passively Q-switched laser based on the as-prepared GDY-SA could be operated at 2µm.The Q-switched laser delivered a maximum average output power of 1.29 W at a central wavelength of 1908.41 nm with up to 54.8%slope efficiency.A repetition rate of 91.58 kHz and single pulse energy of 23.08µJ were obtained.This work is the first application of GDY as an SA to generate all-solid-state pulsed lasers.These results indicate that GDY is a promising SA for solid-state pulsed lasers and has further application potential for ultrafast photonic devices in the 2-µm region. 展开更多
关键词 graphdiyne saturable absorber all-solid-state laser passively Q-switched two-dimensional materials
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