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Generation of intense highly coherent femtosecond pulses in the mid infrared

机译:在中红外产生强烈的高度相干的飞秒脉冲

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Highly coherent mid-infrared femtosecond pulses, tunable between 2.5 and 4.4 mu m, and with an average energy and duration between 2.6 and 3.6 mu m of 11 mu J and 200 fs, respectively, have been produced by an optical parametric amplifier setup driven at 1 kHz by a 400-mu J, 800-nm pulse from a Ti:sapphire amplifier. In this system, first turnable moderate-energy femtosecond pulses in the near infrared are produced by continuum amplification in beta-barium borate, and subsequently the near-infrared pulses are amplified and frequency mixed with 800-nm radiation in potassium titanyl phosphate to produce intense tunable mid-infrared pulses. The time-bandwidth product of the mid-infrared pulses in 0.28 +/- 0.02 over the whole high-energy tuning range. Experimental results are compared with numerical simulations and a simple model. (C) 1997 Optical Society of America.
机译:高参量的中红外飞秒脉冲可通过在以下条件下驱动的光参量放大器设置产生,分别在2.5和4.4μm之间可调,平均能量和持续时间分别在11和200μs和11μJ之间,在2.6和3.6μm之间。来自Ti:蓝宝石放大器的400μJ,800 nm脉冲产生1 kHz。在该系统中,通过连续放大β-硼酸钡产生近红外中的第一个可转动的中等能量飞秒脉冲,然后将近红外脉冲放大并与钛氧基磷酸钾中的800 nm辐射频率混合以产生强可调中红外脉冲。在整个高能量调谐范围内,中红外脉冲的时间带宽积为0.28 +/- 0.02。将实验结果与数值模拟和简单模型进行比较。 (C)1997年美国眼镜学会。

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