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拉曼镭射

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拉曼镭射(英语:Raman laser),镭射的一种,经由拉曼效应产生。拉曼镭射跟一般镭射最大的不同,是拉曼镭射没有居量反转现象。结合拉曼光谱学,它可以显示出它所照射区域的分子性质,被认为有可能取代传统的X光检查。

原理

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当光线照射一个物体时,它会造成在此物体内部的原子同步震动。碰撞到这个物体的光子中,有部分光子会取得或是丧失能量,造成不同波长的光出现。将这个不同波长的光,导入一个特定装置,经过反射及碰撞,增强它的能量,就可以产生出一个同步的镭射光束,这就是拉曼镭射。

研究进展

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2002年,UCLA研究人员利用芯片产生的硅光(Silicon Photonics)成功激发出拉曼镭射,2004年,他们发表了第一个硅镭射(silicon laser)技术。2005年二月,英特尔的研究人员展示了第二代的硅镭射技术,称为连续光波硅电射(continuous wave silicon laser, CW laser),它将外部光源导入特定的硅芯片后,可以产生稳定的镭射光束。因为晶体结构的组成方式,硅原子在被光子撞击时,会持续震动,因此,在硅芯片中产生的拉曼效应,是玻璃的一万倍。

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拉曼镭射
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