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首页> 外文期刊>AIP Advances >Nonlinear optics in germanium mid-infrared fiber material: Detuning oscillations in femtosecond mid-infrared spectroscopy
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Nonlinear optics in germanium mid-infrared fiber material: Detuning oscillations in femtosecond mid-infrared spectroscopy

机译：锗中红外纤维材料中的非线性光学：飞秒中红外光谱中的失谐振荡

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摘要

Germanium optical fibers hold great promise in extending semiconductor photonics into the fundamentally important mid-infrared region of the electromagnetic spectrum. The demonstration of nonlinear response in fabricated Ge fiber samples is a key step in the development of mid-infrared fiber materials. Here we report the observation of detuning oscillations in a germanium fiber in the mid-infrared region using femtosecond dispersed pump-probe spectroscopy. Detuning oscillations are observed in the frequency-resolved response when mid-infrared pump and probe pulses are overlapped in a fiber segment. The oscillations arise from the nonlinear frequency resolved nonlinear (χ(3)) response in the germanium semiconductor. Our work represents the first observation of coherent oscillations in the emerging field of germanium mid-infrared fiber optics.
机译：锗光纤在将半导体光子扩展到电磁光谱的根本重要的中红外区域方面具有广阔的前景。人造Ge纤维样品中非线性响应的证明是开发中红外纤维材料的关键一步。在这里，我们报告使用飞秒分散泵浦探针光谱学观察到的锗纤维在中红外区域的失谐振荡。当中红外泵浦脉冲和探针脉冲在光纤段中重叠时，在频率分辨响应中会观察到失谐振荡。振荡是由锗半导体中的非线性频率分辨非线性（χ（3））响应引起的。我们的工作代表了锗中红外光纤新兴领域中相干振荡的首次观察。

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