Precise frequency measurement of iodine hyperfine transitions at 671 nm

精確測量碘分子超精細躍遷譜線之頻率

黃耀欽(Yao-Chin Huang)

指導教授 ： 王立邦

國立清華大學/理學院/物理學系/碩士(2012年)

https://doi.org/10.6843/NTHU.2012.00639

摘要

穩頻雷射的發展，對於原子分子結構的研究、測量學、光纖通訊系統、精密測量和原子鐘的研究都扮演非常重要角色。以往我們利用特定的原子分子躍遷譜線做為雷射穩頻的基準，得到頻率精準且穩定的雷射光源。

在本論文，我們利用光頻梳測量碘分子R(78) 4-6超精細躍遷譜線的頻率。在碘分子蒸氣壓為26.6 Pa之下測量a1超精細譜線的頻率為446806191.649(23) MHz。然而，量測a1超精細躍遷譜線的頻率結果與軟體(IodineSpec5)相差2.92 MHz，主要原因是缺乏雷射光源，所以此波段範圍較少文獻資料。

實驗系統鎖在碘分子超精細譜線躍遷上可以當參考頻率，進一步研究鋰原子的D譜線。

關鍵字

碘分子 ； 光頻梳 ； 注入式鎖模雷射 ； 調制轉移光譜

並列摘要

The stabilized lasers play important roles in the development of atom and molecule physics, metrology, communication systems, precision measurement and atomic clock. In the past, the frequency of light source laser is stabilized to the certain atomic or molecular transitions.

In the thesis, we measure the absolute frequency of iodine hyperfine transitions (R(78) 4-6) by optical frequency comb. The precise frequency measurement of the a1 component is 446806191.649(23) MHz at the vapor pressure 26.6 Pa. However, the absolute frequency of the a1 component is different about 2.92 MHz to the value of IodineSpec5 software. The main reason is not enough data in this wavelength (667 nm - 775 nm).

The frequency stabilized system acts as a reference laser and is locked the hyperfine a1 component of R(78) 4-6 transition of 127I2 at 671 nm by modulation transfer spectroscopy. Therefore, the system can help us to study the lithium D lines in the future work.

並列關鍵字

iodine ； optical frequency comb ； injection-locked laser ； modulation transfer spectroscopy

參考文獻

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