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Soliton compression in quadratic media: high-energy few-cycle pulses with a frequency-doubling crystal

机译:二次介质中的孤子压缩:具有倍频晶体的高能几个周期脉冲

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摘要

We present a soliton effect pulse compression technique that uses self-defocusing cascaded-quadratic nonlinearities, with no fundamental limit to its scalability to high pulse energies and the capability of generating few-cycle pulses with only a frequency-doubling crystal. The conditions for which group-velocity mismatch causes an acceptable perturbation to soliton compression are analyzed and underlie optimization of the compressor. Calculations predict compression to near-single-cycle durations, with compression ratios as high as 100. Initial experiments closely agree with calculations, demonstrating compression to durations under three optical cycles (12 fs) and generation of 600 nm bandwidths.
机译:我们提出了一种孤子效应脉冲压缩技术,该技术使用了自散焦级联二次非线性,对高脉冲能量的可扩展性和仅用倍频晶体产生几个周期脉冲的能力没有根本限制。分析了组速度不匹配导致孤子压缩产生可接受扰动的条件,这些条件是压缩机优化的基础。计算可预测压缩到接近单个周期的持续时间,压缩比高达100。最初的实验与计算结果非常吻合,证明了在三个光学周期(12 fs)下的压缩持续时间以及600 nm带宽的产生。

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