2016/03/22 by Takumi Kobayashi, Daisuke Akamatsu, Kazumoto Hosaka +6 · 1 citation
Chemistry · Physics and Astronomy · #Advanced Fiber Laser Technologies #Advanced Frequency and Time Standards #Atomic physics #Chemistry #Excited state #Hyperfine structure #Laser #Optics #Physics #Quadrupole #Rotational–vibrational spectroscopy #Spectroscopy and Laser Applications #Ytterbium #physics.atom-ph #physics.optics
paper · pdf · doi:10.1364/josab.33.000725
published as J. Opt. Soc. Am. B 33, 725 (2016)
openalex publication_date 2016/03/22 · arxiv created 2016/03/24 · arxiv updated 2016/03/25 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We report absolute frequency measurements of 81 hyperfine components of the rovibrational transitions of molecular iodine at 578 nm using the second harmonic generation of an 1156 nm external-cavity diode laser and a fiber-based optical frequency comb. The relative uncertainties of the measured absolute frequencies are typically 1.4×10−11. Accurate hyperfine constants of four rovibrational transitions are obtained by fitting the measured hyperfine splittings to a four-term effective Hamiltonian, including the electric quadrupole, spin-rotation, tensor spin-spin, and scalar spin-spin interactions. The observed transitions can be good frequency references at 578 nm and are especially useful for research using atomic ytterbium because the transitions are close to the S01−P03 clock transition of ytterbium.