Title :
Absolute frequency atlas of molecular I2 lines at 532 nm
Author :
Ye, Jun ; Robertsson, Lennart ; Picard, Susanne ; Ma, Long-Sheng ; Hall, John L.
Author_Institution :
Joint Inst. for Lab. Astrophys., Colorado Univ., Boulder, CO, USA
fDate :
4/1/1999 12:00:00 AM
Abstract :
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 recovers nine relatively strong ro-vibrational transitions of 127 I2 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:α10 component. This provides an attractive frequency reference network in this wavelength region
Keywords :
frequency standards; hyperfine structure; iodine; modulation spectra; rotational-vibrational states; visible spectra; 532 nm; I2; SNR; absolute frequency measurement; frequency-doubled Nd:YAG laser; hyperfine splitting; iodine molecule; modulation transfer spectroscopy; ro-vibrational transition; Frequency measurement; Laser stability; Laser transitions; Laser tuning; Measurement standards; Metrology; NIST; Neodymium; Spectroscopy; Time measurement;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
