| Summary: | 碩士 === 國立清華大學 === 物理系 === 103 === The laser frequency stability is an important topic in varies AMO research realms, such as molecule structures, optical-fiber communication, metrology, and the atomic clock. One of the trustable reference to facilitate frequency-locking is atomic spectroscopy.
We measured the polarization spectroscopy of gaseous helium-4, around the 1083-nm D1 and D2 transition lines. By using the Origin software, we fit the data with the Gaussian distribution function, analyzing the line-shape, and calculating the temperature of the gases by the Doppler broadening equation.
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