共查询到15条相似文献,搜索用时 78 毫秒
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报道了采用不等长电极结构的射频激励双通道波导CO2激光器,通过调节射频电源功率的方法可以调谐双通道输出激光的外差频率,其调谐率约为0.1MHz/W。在未采取任何措施时,其短期外差频率稳定性可达10^-10。还在理论上分析了射频功率调谐外差频率的原理。 相似文献
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射频激励扩散型冷却层叠式板条波导千瓦CO2激光器 总被引:3,自引:0,他引:3
提出了一种射频激励扩散型冷却层叠式板条波导CO2激光器结构,利用这种结构,从电极长度为500mm的激光器件中警告了1020W输出,其光电效率为10%。 相似文献
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采用谐振腔内插入声光调制器(AOM)的方法获得了小型CO2激光器的高重频、窄脉宽、高峰值功率输出。通过分析CO2激光器声光调Q的工作原理,利用基于小信号增益和饱和光强的耦合输出数学模型给出了激光器最佳输出镜透过率的数值解,并运用相关实验装置对该数学模型进行了实验验证。理论分析和实验结果均表明:该声光调Q CO2激光器的最佳输出镜透过率为39%。研究了激光器输出性能随脉冲重复频率的变化规律,当脉冲重复频率〉1 kHz时,激光器输出峰值功率下降,这与CO2分子上能级寿命有关,并受声光调Q开关热效应的影响。实验中获得的激光器脉冲频率在1 Hz~100 kHz可调。在脉冲频率为1 kHz时,获得的激光脉冲宽度为156 ns,脉冲峰值功率为10 kW,且稳定性较好,非常适合于作激光与物质相互作用的光源。 相似文献
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报道了基于OptoCeramic(R)电光陶瓷材料的新型调Q光纤激光器.采用976 nm半导体激光器作为抽运源,电光陶瓷调制器作为Q开关,峰值吸收系数1200 Db/m的高掺杂镱纤作为增益介质构成环形腔激光器.增益光纤的高掺杂浓度使得激光器的腔长得到缩短,输出光脉冲的宽度得到压缩.通过调节电光元件的电压,控制材料的折射率,调节谐振腔的损耗,实现Q开关作用.实验中通过改变腔长、抽运功率和重复频率,研究了脉冲的输出特性.获得最窄脉宽104 ns,重复频率3~40 kHz连续可调的调Q脉冲输出. 相似文献
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In this paper a waveguide CO2 laser with two unequal long channels excited by radio frequency (RF) is presented. The volume is 2.25×2.25×400 mm3 for the long channel and 2.25×2.25×200 mm3 for the short waveguide channel. Laser output power is about 8 W for the long channel and about 3.5 W for the short one. 相似文献
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TIAN Zhaoshuo WANG Qi WAN Yusan LIU Fengmei 《Chinese Journal of Lasers》1999,8(6):481-484
1 Introduction TheRFexcitedwaveguideCO2lasershavebeendevelopedforabouttwodecadesandmadeagreatprogress.ThisisduetothefactthatRFdischargehasseveraladvantagesoverdcdischarge[1,2],suchasgreaterstabilityathigherpowerloadings,loweroperatingvoltages,longl… 相似文献
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RF excited CO2 waveguide laser arrays with three different structures (one-dimension and two-dimension) are reported in this paper. The output character of far-field and near-field of those lasers have studies and the phase locking between the waveguide elements has discussed. The cavity length of waveguide laser array is 380 mm and the resonator is formed by placing a plane germanium coated gold mirror and a plane ZnSe output coupler. The laser is operated with filling static gas of He∶N2∶CO2∶Xe=3∶1∶1∶0.1 mixture at 1.06×104 Pa total pressure. High output power density is achieved and the output power is 30-w with an efficiency η=10%. The output power is limited by the maximum power of RF transmitter. 相似文献
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CHEN Yuqing ZHU Jun WANG Jinghuan MA Yangwu 《Chinese Journal of Lasers》1999,8(4):299-302
Introduction TheRFexcitedtechniquetoCO2waveguidelaserhasbeenrapidlyimproved.ManynewstructureshasappearedsinceK.D.Laakman[1]madefirstlyouttransverseexcitedwaveguideCO2laserfirstin1977,suchascoherentphaselocked1×2arrayCO2waveguidelasergivenbyD.G.Youm… 相似文献