Linking the 474 THz HeNe/I/sub 2/ standard to the 445 THz single Sr/sup +/ trapped ion standard: heterodyne frequency measurements using an OsO/sub 4/ stabilized 29 THz laser system

A 29 THz CO/sub 2/ laser system operating on the 10 /spl mu/m R(0) line has been developed, which is frequency-stabilized by third harmonic locking to a saturated absorption resonance of OsO/sub 4/. By difference frequency mixing this radiation and 474 THz radiation referenced to a HeNe/I/sub 2/ las...

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Bibliographic Details
Published in:IEEE transactions on instrumentation and measurement 1999-04, Vol.48 (2), p.553-557
Main Authors: Madej, A.A., Siemsen, K.J., Marmet, L., Bernard, J.E., Acef, O.
Format: Article
Language:English
Subjects:
Frequency conversion
Frequency measurement
Joining processes
Laser stability
Laser transitions
Measurement standards
Nonlinear optics
Particle beam optics
Power lasers
Strontium
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Summary:A 29 THz CO/sub 2/ laser system operating on the 10 /spl mu/m R(0) line has been developed, which is frequency-stabilized by third harmonic locking to a saturated absorption resonance of OsO/sub 4/. By difference frequency mixing this radiation and 474 THz radiation referenced to a HeNe/I/sub 2/ laser standard, sufficient 445 THz power is obtained for an absolute heterodyne measurement of the 445 THz radiation probing a /sup 88/Sr/sup +/ single ion reference transition. A new series of measurements give a value of 444779044086 kHz/spl plusmn/12 kHz for the /sup 88/Sr/sup +/, 5s/sup 2/S/sub 1/2/-4d/sup 2/D/sub 5/2/ center frequency.
ISSN:0018-9456
1557-9662
DOI:10.1109/19.769656