Document Type

Article

Publication Date

Spring 4-15-2002

Publication Title

Optics Letters

ISSN

0146-9592

Volume

27

Issue

8

First Page

57

Last Page

573

DOI

10.1364/OL.27.000571

Abstract

A widely tunable and high-resolution spectrometer based on a frequency-doubled Ti:sapphire laser was used to explore sub-Doppler transitions of iodine molecules in the wavelength range 523–498 nm. The wavelength dependence of the hyperfine transition linewidth of iodine was mapped out in this region, and the narrowest linewidth was ∼4 kHz near 508 nm. The hyperfine-resolved patterns were found to be largely modified toward the dissociation limit. The observed excellent signal-to-noise ratio should lead to high-quality optical frequency standards that are better than those of the popular 532-nm system.

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