Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Absolute Frequency Atlas of Molecular I2 Lines at 532 NM



Jun Ye, Lennart Robertsson, S Picard, L -. Ma, John L. Hall


With the aid of two iodine spectrometers, we report for the first time the measurement of the hyperfine splittings of the P(54) 32-0 and R(57)32-0 transitions near 532 nm. Within the tuning range of the frequency-doubled ND:YAG laser, modulation transfer spectroscopy recoversnine relatively strong ro-vibrational transitions of 127I2 molecules with excellent SNR. These transitions are now linked together with their absolute frequencies determined by measuring directly the frequency gaps between each line and the R(56) 32-0:a10 component. This provides an attractive frequency reference network in this wavelength region.
IEEE Transactions on Instrumentation and Measurement
No. 2


frequency control, frequency measurement, frequency modlulation, laser spectroscopy, YAG lasers


Ye, J. , Robertsson, L. , Picard, S. , Ma, L. and Hall, J. (1999), Absolute Frequency Atlas of Molecular I<sub>2</sub> Lines at 532 NM, IEEE Transactions on Instrumentation and Measurement (Accessed May 20, 2024)


If you have any questions about this publication or are having problems accessing it, please contact

Created April 1, 1999, Updated February 17, 2017