Title :
Synthesis of the frequency of the Ca intercombination line (/spl lambda/=657,5 nm)
Author :
Schnatz, H. ; Lipphardt, B. ; Ohshima, S. ; Riehle, F. ; Kramer, G.
Author_Institution :
Physikalisch Tech. Bundesanstalt, Braunschweig, Germany
fDate :
June 27 1994-July 1 1994
Abstract :
Recently CIPM has recommended the frequency of the Ca-intercombination line at /spl nu/=455986240.5 MHz, determined interferometrically, for the realization of the metre. Based on the existing frequency chain at PTB to the infrared, we report on the realization of phase-coherent frequency multiplication steps from a CO/sub 2/ laser, phase locked to the Cs clock, to the Ca stabilized dye laser.<>
Keywords :
atomic clocks; caesium; calcium; carbon compounds; gas lasers; laser mode locking; length measurement; light interferometry; units (measurement); 455986240.5 MHz; CIPM; CO/sub 2/; CO/sub 2/ laser; Ca; Ca intercombination line; Ca stabilized dye laser; Cs; Cs clock; PTB; beat frequencies; color centre laser; diode laser; frequency chain; metre; phase locking; phase-coherent frequency multiplication; units; Bandwidth; Diode lasers; Frequency synthesizers; Laser noise; Laser stability; Laser tuning; Oscillators; Phase detection; Power lasers; Signal to noise ratio;
Conference_Titel :
Precision Electromagnetic Measurements, 1994. Digest., 1994 Conference on
Conference_Location :
Boulder, CO, USA
Print_ISBN :
0-7803-1984-2
DOI :
10.1109/CPEM.1994.333277
