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Proceedings Paper

Frequency stabilization of a 1.54-um DFB laser diode to Doppler-free absorption lines of acetylene
Author(s): Takayuki Kurosu; Uwe Sterr
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Paper Abstract

We present an optical frequency standard at 1.54 micrometer based on the saturated absorption of the (nu) 1 + (nu) 3 band of acetylene 13C2H2. An external resonator containing an absorption cell at a pressure of 1 Pa was used to build up the power and to increase the absorption length. A linewidth-narrowed DFB diode laser was stabilized to this resonator using the Pound-Drever-Hall technique. The molecular absorption was detected by wavelength modulation spectroscopy and by cavity-enhanced frequency-modulation spectroscopy, using a modulation frequency equal to the free- spectral range of the resonator. We have achieved a frequency stability of 2 X 10-12 for averaging times of 1000 s, as measured by interferometrically comparing the laser to an iodine-stabilized helium-neon laser.

Paper Details

Date Published: 3 May 2001
PDF: 7 pages
Proc. SPIE 4269, Laser Frequency Stabilization, Standards, Measurement, and Applications, (3 May 2001); doi: 10.1117/12.424478
Show Author Affiliations
Takayuki Kurosu, National Research Lab. of Metrology (Japan)
Uwe Sterr, Physikalisch-Technische Bundesanstalt (Germany)

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

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