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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Veröffentlicht in: | IEEE transactions on instrumentation and measurement 1999-04, Vol.48 (2), p.553-557 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | 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. |
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ISSN: | 0018-9456 1557-9662 |
DOI: | 10.1109/19.769656 |