共查询到18条相似文献,搜索用时 75 毫秒
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为充分利用氟化氪(KrF)准分子激光放大器的长泵浦时间,探索提高激光输出效率的方法,开展紫外超短脉冲在KrF准分子激光器中多脉冲放大和组束的实验研究。采用双脉冲放大方案研究激光脉冲时间间隔对输出能量的影响,确定延时时间,提高脉冲总能量并有效抑制自发辐射(ASE)。实现了单次放大4个紫外超短脉冲,获得了近4倍于单脉冲放大的输出能量。并探索紫外超短激光脉冲的组束技术,成功应用光学角多路的方法将两个亚皮秒的紫外激光脉冲进行精确组束。 相似文献
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为了获得具有特殊要求的驱动激光,设计了一套以Nd:YVO4锁模激光器为种子光,用二极管激光器泵浦的Nd:YAG放大系统进行放大的激光系统。对放大过程中锁模激光脉冲串因增益饱和造成的脉冲串包络畸变以及对包络的整形控制进行了研究。实验获得能量为24 mJ的基频光,5.7 mJ的倍频光,0.608 mJ的紫外四倍频光;通过脉冲串整形控制,实现了包络顶部平整的紫外超短脉冲串输出,满足了光阴极注入器对驱动激光的特殊需求。 相似文献
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采用环形再生腔结构的啁啾脉冲放大技术方案, 在重复频率100 Hz,单脉冲能量33.1 mJ的532 nm激光抽运下, 从钛宝石激光中获得了单脉冲能量9.84 mJ的放大输出, 对应的斜效率达33.1%.在重复频率10 Hz的情况下, 同样获得了单脉冲能量为9.64 mJ, 对应斜效率达36.8%的高效率放大结果. 通过色散补偿压缩该啁啾激光脉冲后的单脉冲能量为6.36 mJ, 脉冲宽度为59.7 fs. 测量结果表明典型的能量不稳定度为1.85%.
关键词:
啁啾脉冲放大
再生放大
飞秒激光
环形腔 相似文献
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低重复率的Ti:Al2O3飞秒激光放大器研究 总被引:5,自引:1,他引:4
本文报道了重复频率为10Hz的Ti:Al2O3飞秒激光放大器的研究.基于脉冲啁啾放大技术和采用再生/多通放大装置,得到了能量为8mJ的放大光脉冲,在该放大系统中,激光脉冲获M净增益约8×107. 相似文献
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针对高能量千赫兹重复频率飞秒激光的应用需求,设计了一套采用线性再生腔结构的高效率飞秒钛宝石激光啁啾脉冲放大系统.通过优化腔型设计,在重复频率为1 kHz、单脉冲能量为20 mJ的527 nm激光抽运下,将展宽后的800 nm啁啾脉冲激光的能量放大到5.8 mJ,对应斜效率达到30.7%.进一步通过色散补偿压缩脉冲宽度,获得了单脉冲能量为4 mJ、脉冲宽度为45.7 fs的输出,稳定性测量表明激光的能量抖动仅为0.18%(均方根值). 相似文献
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Generation of broadly tunable picosecond mid-infrared laser and sensitive detection of a mid-infrared signal by parametric frequency up-conversion in MgO:LiNbO<sub>3</sub> optical parametric amplifiers 下载免费PDF全文
Picosecond optical parametric generation and amplification in the near-infrared region within 1.361-1.656 μm and the mid-infrared region within 2.976-4.875 μm is constructed on the basis of bulk MgO:LiNbO 3 crystals pumped at 1.064 μm.The maximum pulse energy reaches 1.3 mJ at 1.464 μm and 0.47 mJ at 3.894 μm,corresponding to a pumpto-idler photon conversion efficiency of 25%.By seeding the hard-to-measure mid-infrared radiation as the idler in the optical parametric amplification and measuring the amplified and frequency up-converted signal in the near-infrared or even visible region,one can measure very week mid-infrared radiation with ordinary detectors,which are insensitive to mid-infrared radiation,with a very high gain.A maximum gain factor of about 7 × 10 7 is achieved at the mid-infrared wavelength of 3.374 μm and the corresponding energy detection limit is as low as about 390 aJ per pulse. 相似文献
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A compact two-stage optical parametric chirped pulse amplifier based on photonic crystal fibre is demonstrated.A 1064-nm soliton pulse is obtained in a home-made photonic crystal fibre (PCF) with femtosecond pulse pumping and then amplified to 2 mJ in an Nd:YAG regenerative amplifier.After the amplified pulses pass through the LBO crystal,the 532-nm double-frequency light with an energy of 0.8 mJ and a duration of over 100 ps at 10-Hz repetition rate is generated as a pump source in the following two-stage optical parametric amplification (OPA).The 850-nm chirped signal light gain from the stretcher is 1.5×10 4 in the first-stage OPA while it is 120 in the second-stage OPA.The total signal gain of optical parametric chirped pulse amplification (OPCPA) can reach 1.8×10 6. 相似文献
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报道了一种实现高能量输出的激光二极管(LD)泵浦无水冷全固态Nd:YAG双程放大器结构。整个放大系统采用了泵浦与晶体棒集成的模块以及半导体制冷器(TEC),从而实现了激光系统的小型化。总腔长为730 mm。在10 Hz重复频率下,主振荡器得到了最大脉冲能量为350 mJ的激光输出。脉宽为9.7 ns,光束质量M2在两个方向分别为7.7和12.3。并进行了双程放大的研究,双程放大后得到了740 mJ、10 ns的激光输出。 相似文献