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分析了铝酸镁镧晶体用于半导体激光泵浦的优点,用LDA纵向泵浦Nd:LMA单块固体激光器,得到波长为1.05μm,连续功率为30mW的TEM模激光输出,线偏振度为100%泵浦阈值功率为250mW。 相似文献
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我们研制了一台二极管连续端泵浦的Nd:YAG激光器,用国产激光二极管作泵浦源,泵浦激光波长为0.808μm。激光介质为φ5×5mm的Nd:YAG棒,输出激光波长为1.06μm,用CCD相机和图象处理系统记录和分析激光光斑,得到激光横模为TEM00模,当输入谐振腔的泵浦功率为225mW时,输出连续激光功率最高达76.4mW,光-光转移效率为33.9%,电光斜效率达到9.1%,并做了腔外倍频实验。 相似文献
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以激光二极管作为泵浦源,KTP用作内腔倍频晶体,我们已从一种新型的Nd:Sr5(PO4)3F晶体中得到了0.5295μm的绿色激光输出,阈值功率为10mW,当光学效率为10.1%二极管激光输入射泵浦功率为400mW,TEM00模绿色激光输入功率为40.4mW,给出了CW内腔倍频激光器的理论公式,并与试验结果一致。 相似文献
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A high power semiconductor laser diode with a tapered and cascaded active multimode interferometer (MMI) cavity was designed and demonstrated.An output power as high as 32 mW was obtained for the novel laser diode with a tapered and cascaded active MMI cavity,being much higher than the 9.8 mW output power of the conventional single ridge F-P laser with the same material structure and the same device length due to the larger active area;and also being higher than the 21.2 mW output power of the rectangular and cascaded active MMI laser diode with nearly the same structure,except for the shape of the MMI area.In addition,the tapered and cascaded active multimode interferometer laser showed stable single mode outputs up to the maximum output power. 相似文献
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A high Er3+-doped narrow linewidth fiber laser based on fiber Bragg grating Fabry-Perot cavity was demonstrated. The spatial hole burning effect was restrained by a fiber Faraday rotator. Two short fiber Bragg grating Fabry-Perot cavities as narrow bandwidth filters discriminated and selected laser longitudinal modes efficiently. A stable single-frequency 1534.83 nm laser was acquired. Pumped by two 976 nm laser diodes and two-ended output, the fiber laser exhibited a 12 mW threshold. Total 39.5 mW output power and one end 22 mW output power were obtained at the maximum 145 mW pump power. Optical-optical efficiency was 27% and slope efficiency was 29.7%. The output power seemed to be saturated when pump power increased. The 3 dB linewidth of the laser was less than 7.5 kHz, measured by the delayed self-heterodyne method with 15 km monomode fiber. The high power narrow linewidth fiber laser can be used in high resolution fiber sensor systems. 相似文献
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基于光纤光栅法布里-珀罗腔的高效窄线宽光纤激光器 总被引:12,自引:0,他引:12
报道了采用双光纤光栅(FBG)法布里-珀罗(F-P)腔选模的线形腔结构窄线宽光纤激光器。激光器以高掺杂Er~(3 )光纤为增益介质,利用全光纤型法拉第旋转器(FR)抑制空间烧孔效应,通过两个短光纤光栅法布里-珀罗腔选模,产生了稳定的1534.83 nm单频激光输出。激光器采用两支976 nm单模激光二极管(LD)抽运,两端输出。激光器阈值抽运光功率为12 mW,在总抽运光功率为145 mW时总输出信号光功率为39.5 mW,单端最高输出信号光功率为22 mW。光-光转换效率为27%,斜率效率为29.7%。随着抽运功率的增加,激光器输出功率趋于饱和。采用延迟自外差方法精确测量光纤激光器线宽,实验中使用了15 km单模光纤延迟线,由于测量精度的限制,得到激光器的线宽小于7kHz。这种光纤激光器具有输出功率高、线宽窄、信噪比高的特点,可用于高精度的光纤传感系统。 相似文献
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钛宝石泵浦Nd:NaY(WOR)2晶体激光性能研究 总被引:5,自引:0,他引:5
介绍了新型激光晶体Nd:NaY(WO4)2(Nd:NYW)的生长,测量了Nd:NYW晶体的透过和发射光谱。以Ti宝石激光器作为泵浦源,对晶体的激光特性进行了研究。当耦合输出镜的透过率为3%时,548nW的泵浦功率下获得192mW的1060nm激光输出,斜功率达到37%,阈值为25mW. 相似文献
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The author describes a continuous-wave (CW) dye laser has been pumped by laser diodes for the first time. Two 10-mW visible laser diodes were polarization-combined to pump a rhodamine 700 dye jet laser. The absorbed pump threshold power was 5.6 mW, and 0.28 mW of output power was produced at 758 nm. The resonator was scalable and generated over 360 mW with a slope efficiency of 57% when pumped with a DCM dye laser at 660 nm 相似文献
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设计了一种采用不同波长的蓝光二极管合光作为抽运源并采用双端抽运的方式抽运Pr:YLF晶体320 nm紫外激光器。该激光器结构采用V型折叠腔结构,使用波长分别为444 nm和469 nm、抽运功率分别为3 W和1.4 W的蓝光激光二极管作为抽运源,对12 mm长、0.3%掺杂浓度的Pr:YLF晶体进行抽运,并且使用三硼酸锂晶体作为倍频晶体来实现倍频,匹配方式为I类相位匹配。通过对谐振腔参数进行优化,当5700 mW的抽运功率注入晶体时,输出了1005 mW最大输出功率的320 nm紫外连续激光,光光转换效率约为17.6%。 相似文献
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半导体激光照射对红细胞流变学性质的影响 总被引:1,自引:0,他引:1
目的:研究低强度激光对红细胞流变学特性的影响。方法:分别用3mW、4mW、5mW、6mW、10mW的半导体激光照射患者离体血液,直接测量切变率为100 S-1、300 S-1、600 S-1、1000 S-1时红细胞的变形指数Dii、最大变形指数MAXDI和变形指数曲线面积SSS。结果:用650nm激光照射20min后,红细胞变形能力有明显改善,此变形能力的改善随照射功率增大而增强,至4mW后趋于饱和。结论:低强度激光照射能显著提高红细胞的变形能力,功率为4mW效果最佳。 相似文献
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Cladding-pumped fiber laser 总被引:5,自引:0,他引:5
Weber T. Luthy W. Weber H.P. Neuman V. Berthou H. Kotrotsios G. Dan J.P. Hintermann H.E. 《Quantum Electronics, IEEE Journal of》1995,31(2):326-329
Laser emission at 1.06 μm, pump light absorption, laser threshold, slope efficiency, and alignment tolerance as a function of the fiber length have been measured for a cladding-pumped double-clad Nd:glass fiber laser. The fiber laser was pumped with a laser diode emitting at 810 nm. It produced an output power of 15.9 mW at an absorbed pump power of 55.1 mW. This corresponds to an optical-optical conversion efficiency of 38.8% 相似文献
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An ytterbium:fluorapatite (Yb:FAP) laser crystal was longitudinally pumped using a Ti:sapphire laser emitting at 905 nm. The highest slope efficiency obtained was 60.5%, and the maximum output power was 214 mW with a pump power of 438 mW. Repetitive Q-switching was demonstrated for the first time. The Q-switched average power was identical to the continuous-wave (CW) power at repetition rates exceeding 20 kHz, as is consistent with the 1.08-ns emission lifetime 相似文献