氦四氣體的偏振光譜

Polarization Spectroscopy of Gaseous Helium-4

吳善鈞(Shan-Jyun Wu)

指導教授 ： 王立邦

國立清華大學/理學院/物理學系/碩士(2015年)

https://doi.org/10.6843/NTHU.2015.00599

摘要

雷射鎖頻在原子分子結構研究、精密量測、光纖通訊與原子鐘等研究上是重要的課題，利用原子分子躍遷光譜可作為雷射鎖頻的依據，得到頻率精準的雷射光。

本實驗量測氦-四氣體躍遷波段位於1083 nm附近，對應躍遷譜線D1及D2線的偏振光譜譜線。利用擬合軟體Origin以高斯函數分析頻寬及譜線形狀，並以都普勒線寬公式算出該氣體分子團的溫度。

關鍵字

氦-四 ； 偏振光譜

並列摘要

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.

並列關鍵字

helium-4 ； polarization spectroscopy

參考文獻

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6. Ohtsubo, N., T. Aoki, and Y. Torii, Buffer-gas-assisted polarization spectroscopy of Li6. Optics Letters, 2012. 37(14): p. 2865-2867.