Laser Spectroscopy激光光谱学
Absorption spectroscopy usually implies having a tunable frequency source and producing a plot of absorption as a function of frequency. This was not feasible with lasers until the advent of the dye lasers which can be tuned over a nearly continuous range of frequencies. 吸收光谱通常意味着需要有可调谐的频率源，并绘制吸收率随频率变化的曲线。直到染料激光器的出现，才使得利用激光器进行这种操作成为可能，因为染料激光器可以在几乎连续的频率范围内进行调谐。
Laser spectroscopy has led to advances in the precision with which spectral line frequencies can be measured, and this has fundamental significance for our understanding of basic atomic processes. This precision has been obtained by passing two laser beams through the absorption sample in opposite directions, selectively triggering absorption only in those atoms that have a zero velocity component in the direction of the beams. This effectively eliminates the Doppler broadening of spectral lines from the distribution of atomic velocities present in the sample. 激光光谱学的进步使得能够更精确地测量谱线频率，这对理解基本的原子过程具有根本意义。这种精度是通过将两束激光以相反方向通过吸收样品来实现的，选择性地仅在那些在光束方向上速度分量为零的原子中触发吸收。这有效地消除了样品中原子速度分布引起的多普勒变宽对谱线的影响。
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Index Laser concepts Laser types Reference Ohanian Essay X 索引 激光概念 激光类型 参考 Ohanian 文章 X | |
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HyperPhysics ***** 量子物理 ***** 光学 |
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Picosecond Laser Spectroscopy Lab皮秒激光光谱实验室
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Index Laser concepts 索引激光概念 | ||
| HyperPhysics***** Quantum Physics ***** Optics
HyperPhysics ***** 量子物理 ***** 光学 |
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