Introduction to Atomic Frequency Standards - 2011 Joint Conference ...

Hyperfine Filtration
Carver & Alley 1958
“Fortuitous” overlap between
the optical absorption lines of
the two naturally-occurring
isotopes, 85 Rb and 87 Rb.
87 Rb Lamp
Spectrum
85 Rb Filter
Absorption
Filtered
Spectrum
D Line Hyperfine Components
6835 MHz
a b
1300 MHz 2500 MHz
A B
Partial Overlap No Overlap
a
Isotopic Filtering of Rubidium 87 D Lines
Courtesy of WJ Riley 2002 PTTI Tutorial
b
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