Title :
Properties of iodine cells contaminated by the heteromolecule /sup 127/I/sup 129/I for metrological applications
Author :
Balling, P. ; Blabla, J.
Author_Institution :
Lab. of Fundamental Metrol., Czech Metrol. Inst., Praha, Czech Republic
Abstract :
The influence of contamination of the iodine cell by heteroisotopic molecule is discussed. Numerical model results are compared with measured values for both third (THT) and fifth (FHT) harmonic method of detection. Contamination causes substantially lower frequency shift in the case of FHT.
Keywords :
frequency standards; gas lasers; helium; hyperfine structure; iodine; laser frequency stability; neon; rotational-vibrational states; spectral line shift; 633 nm; HFS components; He-Ne; I/sub 2/; I/sub 2/-stabilised He-Ne lasers; contamination influence; fifth harmonic; frequency shift; frequency standards; harmonic method of detection; heteromolecule /sup 127/I/sup 129/I; iodine cells; numerical model; rotational-vibrational transitions; third harmonic; third harmonic locking; Contamination; Filling; Frequency; Harmonic distortion; Impurities; Laser noise; Laser stability; Laser transitions; Pollution measurement; Shape;
Conference_Titel :
Precision Electromagnetic Measurements Digest, 1998 Conference on
Conference_Location :
Washington, DC, USA
Print_ISBN :
0-7803-5018-9
DOI :
10.1109/CPEM.1998.699889
