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Proceedings Paper

Frequency reproducibility of I2-stabilized Nd:YAG lasers
Author(s): Feng-Lei Hong; Yun Zhang; Jun Ishikawa; Youichi Bitou; Atsushi Onae; Jun Yoda; Hirokazu Matsumoto; Kenichi Nakagawa
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Paper Abstract

We have established four I2-stabilized Nd:YAG lasers to verify the frequency reproducibility of the lasers. The observed square root Allan variance of the four lasers was between 1 to approximately 4 X 10-14 depending on the obtained signal-to-noise ratio of the spectra, when the integration time is larger than 300 s. The observed frequency reproducibility of each laser was ranged from 9.1 X 10-14 approximately 1.5 X 10-13 (corresponding to frequency uncertainties of +/- 51 approximately 87 Hz). Frequency reproducibility of a group of lasers (four NRLM lasers) has been evaluated to be 8.2 X 10-13 (corresponding to a frequency uncertainty of +/- 640 Hz). One of the four NRLM lasers is a compact I2- stabilized Nd:YAG laser which is suitable to be transported to other laboratories for international frequency comparisons. Using this portable laser, we have accomplished frequency comparisons of Nd:YAG lasers between several metrological institutes in different countries. The absolute optical frequencies of the NRLM lasers were determined with an uncertainty of about 1.5 kHz by the frequency comparison between the NRLM and the JILA (formerly the Joint Institute for Laboratory of Astrophysics), Boulder, CO.

Paper Details

Date Published: 3 May 2001
PDF: 12 pages
Proc. SPIE 4269, Laser Frequency Stabilization, Standards, Measurement, and Applications, (3 May 2001); doi: 10.1117/12.424464
Show Author Affiliations
Feng-Lei Hong, National Research Lab. of Metrology (Japan)
Yun Zhang, National Research Lab. of Metrology (Japan)
Jun Ishikawa, National Research Lab. of Metrology (Japan)
Youichi Bitou, National Research Lab. of Metrology (Japan)
Atsushi Onae, National Research Lab. of Metrology (Japan)
Jun Yoda, National Research Lab. of Metrology (Japan)
Hirokazu Matsumoto, National Research Lab. of Metrology (Japan)
Kenichi Nakagawa, Univ. of Electro-Communications (Japan)


Published in SPIE Proceedings Vol. 4269:
Laser Frequency Stabilization, Standards, Measurement, and Applications
John L. Hall; Jun Ye, Editor(s)

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