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- Title
Optical Frequency References at 1542 nm: Precision Spectroscopy of the R(106)50-0, R(100)49-0, R(84)47-0, R(59)45-0, P(82)47-0, and P(71)46-0 Lines of 127 I 2 at 514 nm.
- Authors
Matsunaga, Shogo; Isawa, Yuta; Akamatsu, Daisuke; Hong, Feng-Lei
- Abstract
Frequency-stabilized lasers are fundamental topics in research relating to optical frequency and wavelength standards. The absolute frequencies and hyperfine structures of the R(106)50-0, R(100)49-0, R(84)47-0, R(59)45-0, P(82)47-0, and P(71)46-0 lines of molecular iodine (127I2) at 514 nm were measured using a frequency-stabilized laser based on modulation transfer spectroscopy. The hyperfine splitting of each line was fitted to a four-term Hamiltonian with an uncertainty of several kilohertz to obtain the hyperfine constants for the line. A total of 97 hyperfine transitions of the six lines were measured with an uncertainty of 5.6 kHz (fractionally 9.6 × 10−12). They can provide new optical frequency references for telecommunication and other applications.
- Subjects
TELECOMMUNICATIONS standards; HYPERFINE coupling; MOLECULAR gas lasers; FREQUENCY standards; MODULATION spectroscopy; HYPERFINE structure
- Publication
Photonics, 2024, Vol 11, Issue 8, p770
- ISSN
2304-6732
- Publication type
Article
- DOI
10.3390/photonics11080770