Frequency stabilization of a 1.54-um DFB laser diode to Doppler-free absorption lines of acetylene

Takayuki Kurosu; Uwe Sterr

doi:10.1117/12.424478

3 May 2001 Frequency stabilization of a 1.54-μm DFB laser diode to Doppler-free absorption lines of acetylene

Takayuki Kurosu, Uwe Sterr

Proceedings Volume 4269, Laser Frequency Stabilization, Standards, Measurement, and Applications; (2001) https://doi.org/10.1117/12.424478
Event: Photonics West 2001 - LASE, 2001, San Jose, CA, United States

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.

Citation Download Citation

Takayuki Kurosu and Uwe Sterr "Frequency stabilization of a 1.54-μm DFB laser diode to Doppler-free absorption lines of acetylene", Proc. SPIE 4269, Laser Frequency Stabilization, Standards, Measurement, and Applications, (3 May 2001); https://doi.org/10.1117/12.424478

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