Study of the hyperfine structure of emission lines of I{sub 2} molecules by the method of three-level laser spectroscopy

Journal Article · Sun Aug 31 04:00:00 EDT 2008 · Quantum Electronics (Woodbury, N.Y.)

DOI:https://doi.org/10.1070/QE2008V038N08ABEH013761· OSTI ID:21476070

Matyugin, Yu A; Okhapkin, M V; Skvortsov, M N; Ignatovich, S M; Bagaev, S N ^[1]

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1. Institute of Laser Physics, Siberian Branch, Russian Academy of Sciences, Novosibirsk (Russian Federation)

It is proposed to use narrow optical resonances, corresponding to the hyperfine structure components of emission transitions in I{sub 2}, as frequency references to stabilise laser radiation frequency in the spectral range from 0.8 to 1.3 {mu}m. To obtain such resonances and investigate the hyperfine structure of emission transitions, an experimental setup is built which consists of a saturated absorption laser spectrometer and a three-level laser spectrometer. Excitation is performed by the second harmonic of a cw Nd:YAG laser and probe radiation in the range from 968 to 998 nm is generated by an external cavity diode laser. The radiation beams from both lasers are combined in a cell with iodine vapour, excitation in the cell being performed in the regime of two counterpropagating waves. It is shown that upon phase modulation of exciting radiation, narrow resonances, having the form of the dispersion dependence, appear at the centre of Doppler lines in absorption and emission. These resonances can be used as references to stabilise the laser frequency. The results of the study of the hyperfine structure of emission lines at the (J' = 57, v' = 32) {yields} (J'' = 58, v'' = 48) transition upon excitation at the (J'' = 56, v'' = 0) {yields} (J' = 57, v'' = 32) transition are presented. (laser spectroscopy)

• OSTI ID: 21476070
• Journal Information: Quantum Electronics (Woodbury, N.Y.), Journal Name: Quantum Electronics (Woodbury, N.Y.) Journal Issue: 8 Vol. 38; ISSN 1063-7818
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ABSORPTION
BEAMS
DISPERSIONS
DOPPLER EFFECT
ELECTROMAGNETIC RADIATION
ELEMENTS
EMISSION
ENERGY-LEVEL TRANSITIONS
EXCITATION
FLUIDS
FREQUENCY MIXING
FREQUENCY MODULATION
GASES
HALOGENS
HARMONIC GENERATION
HYPERFINE STRUCTURE
IODINE
LASER CAVITIES
LASER RADIATION
LASER SPECTROSCOPY
LASERS
MEASURING INSTRUMENTS
MODULATION
MOLECULES
NEODYMIUM LASERS
NONMETALS
PHOTON BEAMS
RADIATIONS
RESONANCE
SOLID STATE LASERS
SORPTION
SPECTROMETERS
SPECTROSCOPY
VAPORS
WAVE PROPAGATION