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Absolute frequency and hyperfine structure of 127I2 transitions at 531.5 nm by precision spectroscopy using a narrow-linewidth diode laser
Journal of the Optical Society of America B ( IF 1.9 ) Pub Date : 2020-03-12 , DOI: 10.1364/josab.385779
Haruki Sakagami , Kazumichi Yoshii , Takumi Kobayashi , Feng-Lei Hong

The absolute frequency and hyperfine structure of the $P({98}){34 {\text -} 0}$, $R({38}){32 {\text -} 0}$, $P({35}){32 {\text -} 0}$, $P({112}){35 {\text -} 0}$, $R({75}){33 {\text -} 0}$, $R({37}){32 {\text -} 0}$, and $P({34}){32 {\text -} 0}$ transitions of molecular iodine at 531.5 nm are measured using high-resolution spectroscopy based on a narrow-linewidth planar-waveguide external cavity diode laser. The absolute frequencies of the transitions are determined with an uncertainty of 5.7 kHz, while the hyperfine structures are measured with an uncertainty of $ \lt {1}\;{\rm kHz}$. High-precision hyperfine constants are obtained by fitting the measured hyperfine splittings, with an uncertainty of approximately 1 kHz, to a four-term Hamiltonian that includes the electric quadrupole, spin–rotation, tensor spin–spin, and scalar spin–spin interactions. The measured absolute frequencies and hyperfine structures are useful for optical frequency metrology and studies of molecular iodine.

中文翻译:

使用窄线宽二极管激光器通过精密光谱法在531.5 nm处127 I 2跃迁的绝对频率和超精细结构 

$ P({98}){34 {\ text-} 0} $$ R({38}){32 {\ text-} 0} $$ P({35}的绝对频率和超精细结构){32 {\ text-} 0} $$ P({112}){35 {\ text-} 0} $$ R({75}){33 {\ text-} 0} $$ R ({37}){32 {\文本- } 0} $,和$ - $ P({34}){} 0 32 {\文本}在531.5纳米分子碘的转换是使用基于高分辨率光谱测量窄线宽平面波导外腔二极管激光器。确定过渡的绝对频率的不确定性为5.7 kHz,而测量超精细结构的不确定性为$ \ lt {1} \; {\ rm kHz} $。高精度超精细常数是通过将测量的超精细裂隙拟合到不确定的大约1 kHz的四项哈密顿量获得的,该四项哈密顿量包括电四极子,自旋-旋转,张量自旋-自旋和标量自旋-自旋相互作用。测得的绝对频率和超精细结构可用于光学频率计量和分子碘的研究。
更新日期:2020-03-12
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