Title :
Linking the 474 THz HeNe/I2 standard to the 445 THz single Sr+ trapped ion standard: heterodyne frequency measurements using an OsO4 stabilized 29 THz laser system
Author :
Madej, Alan A. ; Siemsen, Klaus J. ; Marmet, Louis ; Bernard, John E. ; Acef, O.
Author_Institution :
Inst. for Nat. Meas. Stand., Nat. Res. Council of Canada, Ottawa, Ont., Canada
fDate :
4/1/1999 12:00:00 AM
Abstract :
A 29 THz CO2 laser system operating on the 10 μm R(0) line has been developed, which is frequency-stabilized by third harmonic locking to a saturated absorption resonance of OsO4. By difference frequency mixing this radiation and 474 THz radiation referenced to a HeNe/I2 laser standard, sufficient 445 THz power is obtained for an absolute heterodyne measurement of the 445 THz radiation probing a 88Sr+ single ion reference transition. A new series of measurements give a value of 444779044086 kHz±12 kHz for the 88Sr+, 5s2S 1/2-4d2D5/2 center frequency
Keywords :
carbon compounds; frequency standards; gas lasers; laser frequency stability; measurement by laser beam; optical frequency conversion; optical saturable absorption; osmium compounds; 29 THz; 445 THz; 474 THz; CO2; CO2 laser; HeNe; HeNe/I2 standard; I2; OsO4; OsO4 saturated absorption resonance; Sr; difference frequency mixing; frequency stabilization; heterodyne frequency measurement; single Sr+ trapped ion standard; third harmonic locking; Frequency conversion; Frequency measurement; Joining processes; Laser stability; Laser transitions; Measurement standards; Nonlinear optics; Particle beam optics; Power lasers; Strontium;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
