Title :
Progress toward absolute frequency measurements of the 127 I2-stabilized Nd:YAG laser at 563.2 THz/532 nm
Author :
Ducos, F. ; Hadjar, Y. ; Rovera, G.D. ; Zondy, Jean-Jacques ; Acef, O.
Author_Institution :
CNRS, Paris, France
fDate :
4/1/2001 12:00:00 AM
Abstract :
Progress on the development of a frequency chain devoted to the absolute frequency measurement of 127I2-stabilized lasers around 563.2 THz/532 nm is reported. The aim of this work is the improvement of the accuracy-by at least one order of magnitude-of the absolute frequency of this standard. The scheme is based on the frequency combination of two well-known optical frequency standards, namely a CO2 laser stabilized on OsO4, and a 778-nm diode laser stabilized on Rb measured, at BNM-LPTF, against a cesium primary standard with 2×10-13 and 2×10-12 relative uncertainty respectively. This last value gives the ultimate accuracy of the reported chain
Keywords :
frequency measurement; garnets; iodine; laser frequency stability; laser variables measurement; neodymium; optical harmonic generation; solid lasers; yttrium compounds; 532 nm; 563.2 THz; 778 nm; 127I2-stabilized Nd:YAG laser; CO2; CO2 laser; OsO4; Rb; SHG; YAG:Nd,I; YAl5O12:Nd,I; absolute frequency measurements; accuracy improvement; diode laser; frequency chain; optical frequency standards; Diode lasers; Distributed feedback devices; Frequency measurement; Frequency synthesizers; Laser stability; Laser transitions; Measurement standards; Optical saturation; Reproducibility of results; Uncertainty;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
