Title :
Direct frequency measurement of iodine-stabilised frequency-doubled Nd:YAGlasers at /spl lambda/=532 nm
Author :
Schnatz, H. ; Riehle, F. ; Nevsky, A. ; Holzwarth, R. ; Reichert, J. ; Udem, T. ; Hansch, T.W. ; von Zanthier, J. ; Walther, H. ; Pokasov, P. ; Skvortsov, M. ; Bagayev, S.
Author_Institution :
Phys. Tech. Bundesanstalt, Braunschweig, Germany
Abstract :
We have determined the frequency of the a/sub 1/ component of the P(54)32-0 transition of molecular iodine with an estimated relative standard uncertainty below 1/spl middot/10/sup -11/ using a phase-coherent optical frequency chain from the CH/sub 4/ frequency standard to the visible. This allows the realisation of the meter by visible frequencies with an uncertainty reduced by more than one order of magnitude compared to previous measurements (1999).
Keywords :
frequency standards; iodine; measurement by laser beam; neodymium; yttrium compounds; 532 nm; CH/sub 4/ frequency standard; I/sub 2/; I/sub 2/ stabilised frequency-doubled Nd:YAG- lasers; Nd:YAG; Nd:YAl5O12; direct frequency measurement; phase-coherent optical frequency chain; relative standard uncertainty; visible frequencies; Atom lasers; Atom optics; Frequency estimation; Frequency measurement; Laser mode locking; Laser noise; Laser stability; Laser theory; Laser transitions; Uncertainty;
Conference_Titel :
Precision Electromagnetic Measurements Digest, 2000 Conference on
Conference_Location :
Sydney, NSW, Australia
Print_ISBN :
0-7803-5744-2
DOI :
10.1109/CPEM.2000.851191
