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首页> 外文期刊>Optics Letters >Single-step sub-200 fs mid-infrared generation from an optical parametric oscillator synchronously pumped by an erbium fiber laser
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Single-step sub-200 fs mid-infrared generation from an optical parametric oscillator synchronously pumped by an erbium fiber laser

机译：由光纤激光器同步泵浦的光学参量振荡器单步产生低于200 fs的中红外光

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摘要

We demonstrate the single-step generation of mid-infrared femtosecond laser pulses in a AgGaSe2 optical parametric oscillator that is synchronously pumped by a 100 MHz repetition rate sub-90 fs erbium fiber laser. The tuning range of the idler beam in principle covers similar to 3.5 to 17 mu m, only dependent on the choice of cavity and mirror design. As an example, we experimentally demonstrate idler pulse generation from 4.8 to 6.0 mu m optimized for selective vibrational resonant molecular spectroscopy. We find an oscillation threshold as low as 150 mW of pump power. At 300 mW pump power and a central wavelength of similar to 5.0 mu m, we achieve an average infrared power of up to 17.5 mW, with a photon conversion efficiency of similar to 18%. A pulse duration of similar to 180 fs is determined from a nonlinear cross-correlation with residual pump light. The single-step nonlinear conversion leads to a high power stability with <1% average power drift at <0.5% rms noise over 1 h. (C) 2016 Optical Society of America
机译：我们展示了由100 MHz重复频率低于90 fs的fiber光纤激光器同步泵浦的AgGaSe2光参量振荡器中单步产生中红外飞秒激光脉冲的过程。惰轮束的调谐范围原则上覆盖3.5至17微米，仅取决于腔体和反射镜设计的选择。例如，我们通过实验证明了从4.8到6.0μm的惰轮脉冲生成最适合选择性振动共振分子光谱。我们发现泵浦功率的振荡阈值低至150 mW。在300 mW的泵浦功率和大约5.0μm的中心波长下，我们获得的平均红外功率高达17.5 mW，光子转换效率接近18％。根据与残留泵浦光的非线性互相关来确定类似于180 fs的脉冲持续时间。单步非线性转换可实现高功率稳定性，并且在1小时内的均方根噪声小于0.5％时，平均功率漂移小于1％。 （C）2016美国眼镜学会

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