Hyperfine transitions of molecular iodine were observed by use of the frequency-doubled output of a 1319-nm Nd:YAG laser with saturation spectroscopy. The laser frequency was stabilized to the observed hyperfine transition and reached a stability of 6×10<sup>-12</sup> for a 1.5-s averaging time, improving toward the 1×10<sup>-12</sup> level after 100 s. The iodine-stabilized 1319-nm Nd:YAG laser is an excellent candidate for an optical frequency standard for telecommunication applications.
© 2004 Optical Society of America
(060.4510) Fiber optics and optical communications : Optical communications
(120.3940) Instrumentation, measurement, and metrology : Metrology
(300.6360) Spectroscopy : Spectroscopy, laser
(300.6460) Spectroscopy : Spectroscopy, saturation
Ruixiang Guo, Feng-Lei Hong, Atsushi Onae, Zhi-Yi Bi, Hirokazu Matsumoto, and Ken'ichi Nakagawa, "Frequency stabilization of a 1319-nm Nd:YAG laser by saturation spectroscopy of molecular iodine," Opt. Lett. 29, 1733-1735 (2004)