Absolute frequency measurements and comparisons in iodine at 735nm and 772nm

S. Reinhardt, B. Bernhardt, C. Geppert, R. Holzwarth, G. Huber, S. Karpuk, N. Miski-Oglu, W. Nörtershäuser, C. Novotny, Th. Udem

Research output: Contribution to journalArticlepeer-review


We report frequency measurements at the rovibronic transition P(42)1-14 (772 nm) and R(114)2-11 (735 nm) from the electronic transition of the iodine molecule 127I2 with the help of a frequency comb as a reference. By using Doppler-free saturation spectroscopy a frequency precision in the 7 × 10−10 region is reached and two iodine cells both operated at 550–600 °C are compared. To relate our results to other measurements, the absolute transition frequency of the hyperfine structure line P(148)1-14 a1 at 780 nm with an already known transition frequency was also determined.
Original languageEnglish
Pages (from-to)354 - 360
Number of pages7
JournalOptics Communications
Issue number2
Publication statusPublished - 7 Feb 2007
Externally publishedYes


  • Hyperfine structure, Molecular iodine, Optical frequency standard, Laser spectroscopy, Heated iodine cells, Optical frequency comb generator

Fields of Expertise

  • Advanced Materials Science


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