共查询到19条相似文献,搜索用时 109 毫秒
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利用光参量放大过程输出的闲置光载波-包络相位(CEP)被动稳定的特点,搭建了三级光参量放大(OPA)系统,获得了CEP稳定的近红外高能量超短激光脉冲(1.4 mJ/40 fs/1 kHz @ 1.8 μm),其CEP抖动为516 mrad(rms).经空心光纤展宽光谱和块体材料补偿色散,激光脉宽最终可被压缩至小于两个光学周期(<12 fs),脉冲能量达到0.54 mJ.该系统为单个阿秒脉冲的产生和其他高次谐波实验提供了优质的光源.
关键词:
光参量放大
周期量级近红外激光脉冲
载波-包络相位稳定 相似文献
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飞秒激光脉冲的载波包络相移测量与控制是实现阿秒脉冲与光学原子钟的重要内容,在利用光子晶体光纤扩展飞秒钛宝石激光振荡器光谱的研究基础上,通过自参考技术测量并优化了该激光输出脉冲的载波包络相移所引起的拍频信号.实验上采用半导体抽运的倍频Nd:YVO4532nm激光器作为抽运源,对钛宝石激光器所产生的平均功率500mW、脉宽18fs的光脉冲进行拍频测量后观察到约23MHz的频移,对应于每周期053π的载波包络相移.飞秒激光脉冲载波包络相移测量的实现对于进一步利用电子反馈系统精确控制载波包络相移,从而得到高稳定的飞秒激光频率梳具有重要意义.
关键词:
载波包络相移
光子晶体光纤
飞秒
超连续 相似文献
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为了消除群速失配对参量放大的不利影响,描述了利用脉冲波面倾斜与非共线相位匹配相结 合,完全补偿飞秒光参量放大(OPA)中三波群速失配的新方法.计算了在BBOⅠ类、Ⅱ类相 位匹配条件下, 三波实现群速匹配时,相位匹配角、脉冲波面倾斜角以及非共线角随信号 光波长的变化.并分析了三波群速匹配对空间走离长度、参量增益和参量带宽的影响.结果表 明,在BBOⅠ类、Ⅱ类相位匹配条件下,利用该方法均能实现飞秒OPA连续调谐时三波的群速 匹配,从而大大增加了三波的有效互作用长度,为能够获得高增益,窄脉宽的参量光脉冲提 供了理论依据和指导.
关键词:
群速匹配
脉冲波面倾斜
非共线相位匹配
飞秒光参量放大 相似文献
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The carrier-envelope phase (CEP) characteristics of the tunable infrared laser pulses from a noncollinear optical parametric amplifier (OPA) with passively stabilized CEP are investigated experimentally. We compare the CEP fluctuation of different wavelength outputs from the OPA which is seeded by the idler pulse of a difference frequency generation (DFG) process. It is found that when the OPA output is tuned to a longer wavelength, the CEP fluctuation becomes less sensitive to the jitter of laser intensity and the phase mismatch, and therefore more stable CEP for the longer wavelength output pulses is realized. 相似文献
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Balčiūnas T Mücke OD Mišeikis P Andriukaitis G Pugžlys A Giniūnas L Danielius R Holzwarth R Baltuška A 《Optics letters》2011,36(16):3242-3244
In this paper we report on the active stabilization of the carrier envelope phase (CEP) of a Yb:KGW chirped pulse amplifier laser system seeded by a Yb-doped solid-state Kerr-lens mode-locked oscillator. The regenerative amplifier delivers 180 fs CEP stable pulses of 30 μJ-1 mJ energy at a repetition rate tunable from 1 to 200 kHz. The bandwidth of the feedback loop was extended by a factor of 5 using a specially designed high-pass filter, which resulted in a dramatic decrease of CEP jitter below 0.45 rad after the amplifier. 相似文献
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ZHU Heyuan XU Guang WANG Tao QIAN Liejia & FAN Dianyuan State Key Laboratory for Advanced Photonic Materials & Devices Department of Optical Science Engineering Fudan University Shanghai China 《中国科学G辑(英文版)》2004,47(6)
1 Introduction Optical parametric amplification (OPA) based on femtosecond Ti:sapphire regen-erative amplifiers has been widely adopted in wavelength extension of ultrashort opticalpulses[1]. While BBO-based femtosecond optical parametric amplifiers have alreadycommercialized, the tuning range of such an 800 nm-pumped OPA is typically between1.15 μm and 2.6 μm due to the limited transparent range of BBO. From application’spoint of view, ultrashort pulses near 1 μm and between 3 and 4 … 相似文献
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A CW seeded femtosecond optical parametric amplifier, a compromise between OPG/OPA and strongly seeded OPA configurations,
has been demonstrated. An independent CW Nd: YAG laser with sub-watt power decreases the pump threshold of the OPA and improves
the stability of the output pulses considerably. Output signal energies as high as 30 μJ with pulse durations less than 250
fs near 1 μm are reported. from this two-stage device. 相似文献
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《Laser \u0026amp; Photonics Reviews》2017,11(6)
A high‐power femtosecond Yb:fiber system is seeded by a phase‐locked Er:fiber source and drives an ultra‐broadband optical parametric amplifier that operates at 10 MHz repetition rate. The resulting pulses display precise control of the carrier‐envelope phase. Their 8.3 fs temporal duration corresponds to 2.3 optical cycles of the 1100 nm carrier wavelength. Focusing 200 nJ of pulse energy into widegap materials generates optical harmonics up to fifth order. Even in a perturbative regime, strong effects of the carrier‐envelope phase on the emitted spectra are observed. 相似文献
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S. Cussat-Blanc A. Ivanov D. Lupinski E. Freysz 《Applied physics. B, Lasers and optics》2000,70(7):S247-S252
We have designed a simple mid-IR femtosecond OPA seeded by a white-light continuum and delivering very stable, largely tunable and energetic output pulses. This OPA requires fewer than 200 7J of 120-fs Ti:sapphire pump pulses as energy. This system allowed us to experimentally compare the performances of potassium crystals (KTP, KTA, and KNbO3) for the generation of up to 100-fs Fourier-transform-limited pulses tunable in 1-4.6 7m mid-IR wavelengths. 相似文献
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Nearly transform limited femtosecond pulses tunable between 2.56 and 3.16 m have been generated by optical parametric amplification. The single stage parametric amplifier is pumped by a tunable high power femtosecond Ti:sapphire laser system at 1 kHz repetition rate and seeded by quasi-continuous wave (cw) radiation from the Q-switched Nd:YLF laser used to pump the regenerative amplifier. The 100 fs idler pulses are shorter than the pump pulses. The mechanism of the achieved pulse compression is discussed and experimental results are compared with numerical simulations. 相似文献
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We show efficient generation of mid-IR pulses tunable between 1 and 5?μm from 100?kHz class femtosecond systems. The concept can be applied to various sources, particularly based on Ti:sapphire and the newly evolving Yb+ lasers. The mid-IR pulses are generated as the idler of a collinear optical parametric amplifier pumped by the laser fundamental. The seed for this amplifier is the idler of a previous amplification stage pumped with the second harmonic and seeded with a visible continuum. This enhances the energy and allows us to influence the bandwidth of the final output. Pulses with microjoule energy and Fourier limits of 50?fs are achieved. 相似文献
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Acquiring 1053 nm femtosecond laser emission by optical parametric amplification based on supercontinuum white-light injection 总被引:1,自引:0,他引:1
We report a terawatt-Ti:sapphire-laser-pumped high-energy femtosecond optical parametric amplifier (OPA) with supercontinuum white-light injection. Signal pulses with a duration less than 100 fs and energy up to 4 mJ are obtained with large-aperture LiNbO3 crystals. This megajoule-class femtosecond OPA at 1053 nm presents a feasible alternative to optical parametric chirped-pulse amplification and is ready to be applied to petawatt lasers. 相似文献