Abstract

Recently, a simple common-path, two-color interferometer has been used for Doppler-free saturated dispersion spectroscopy of iodine. We have used such a set-up to stabilize a Nd:YAG laser for the first time, to our knowledge. This method requires only a small number of low-cost optical components compared to frequency modulation techniques. We have measured a root Allan variance of 5·10-12 for 0.2 s, and below 5·10-11 for integration times up to 300 s.

© 2004 Optical Society of America

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References

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IEEE Trans. Audio and Electroacoust.

P. D. Welch, �??The use of fast Fourier transform for estimation of power spectra: A method based on time averaging over short, modified periodogramms,�?? IEEE Trans. Audio and Electroacoust. AU-15, 70�??73 (1967).
[CrossRef]

IEEE Trans. on Instr. and Meas.

K. Nyholm, M. Merimaa, and A. Lassila, �??Frequency stabilization of a diode-pumped Nd:YAG laser at 532 nm to iodine by using third-harmonic technique,�?? IEEE Trans. on Instr. and Meas. 52, 284�??287 (2003).
[CrossRef]

J. Opt. Soc. Am. B

J. Phys. E: Scient. Instr.

A. J. Wallard, �??Frequency stabilization of helium-neon laser by saturated absorption in iodine vapour,�?? J. Phys. E: Scient. Instr. 5, 926�??930 (1972).
[CrossRef]

Jpn. J. Appl. Phys.

F.-L. Hong, A. Onae, H. Matsumoto, �??Modulation-free saturated dispersion spectroscopy of I2 using a common-path two-colour interferometer with a Nd:YAG laser,�?? Jpn. J. Appl. Phys. 39, 1918-1919 (2000).
[CrossRef]

Opt. Commun.

H. Matsumoto and T. Honda, �??Modulation-free iodine-stabilized green YAG laser with a common-path interferometer,�?? Opt. Commun., 127, 283�??287 (1996).
[CrossRef]

Opt. Lett.

Proc. IEEE

D. W. Allan, �??Statistics of atomic frequency standards,�?? Proc. IEEE 54 221�??230 (1966).
[CrossRef]

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Figures (5)

Fig. 1.
Fig. 1.

Schematic of frequency stabilized Nd:YAG laser with a common-path, two-color interferometer. For further details see text.

Fig. 2.
Fig. 2.

Bandpass-filtered modulation-free dispersion signal of the a 1 component of the R(56)32-0 iodine line.

Fig. 3.
Fig. 3.

Low-pass-filtered error signals of the R(56)32-0 iodine line for frequency stabilization.

Fig. 4.
Fig. 4.

Time series of the beat frequency of the stabilized and unstabilized Nd:YAG laser (a). Stabilized laser frequency measurement on a fine frequency scale (b).

Fig. 5.
Fig. 5.

Linear spectral density (a) and root Allan variance (b) of the stabilized and unstabilized laser frequency.

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