Abstract
The o hyperfine component of the 127I2
17-1 P(62) transition at 520 THz (576 nm) in iodine was
measured with respect to the CH4-stabilized 88-THz He–Ne
laser. A 26-THz CO2 laser, a color-center laser at 130 THz, and a
He–Ne laser at 260 THz were used as transfer oscillators. The measured
I2 frequency was 520 206 808.547 MHz with a total fractional
uncertainty of 1.6 × 10−10. The
1.15-μm 20Ne Lamb-dip-stabilized laser
frequency was 260 103 249.26 MHz with a total fractional uncertainty of 3.1
× 10−10.
© 1983 Optical Society of America
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