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Journal of the Optical Society of Korea

Journal of the Optical Society of Korea


  • Vol. 7, Iss. 3 — Sep. 25, 2003
  • pp: 131–134

Frequency-stabilized Femtosecond Mode-locked Laser for Optical Frequency Metrology

Tai-Hyun Yoon, Eok-Bong Kim, and Seong-Tae Park  »View Author Affiliations

Journal of the Optical Society of Korea, Vol. 7, Issue 3, pp. 131-134 (2003)

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We demonstrated an optical frequency synthesizer based on a femtosecond (fs) mode-locked Ti:sapphire (Ti:s) laser by simultaneously stabilizing the carrier-offset frequency, <TEX>$f_{ceo}$</TEX>, and repetition rate, <TEX>$f_{ rep}$</TEX>, referenced to the Cs atomic frequency standard. By using two wide-band digital phase-detectors we realized a phase-coherent link between <TEX>$f_{rep} and f_{ceo} with the relation f_{ceo} = f_{AOM} 5/6f_{rep} ≡ 0, where f_{AOM} = 5/6f_{rep}$</TEX> is the phase-locked driving frequency of an acousto-optic modulator (AOM) in a self-referencing interferometer and <TEX>$f_{rep}$</TEX> = 100 MHz. As a result, we could stabilize all components of the fs laser comb at once with an equal frequency separation <TEX>$f_{rep}$</TEX> = 100 MHz with <TEX>$f_{ceo}$</TEX> = 0. In our optical frequency synthesizer, the frequency of the nth component (<TEX>$f_{n}$</TEX>) is given exactly by the simple relation <TEX>$f_n = nf_{rep}$</TEX>, enabling us to use the fs laser comb as a frequency ruler in the optical frequency metrology.

© 2003 Optical Society of Korea

OCIS Codes
(320.0320) Ultrafast optics : Ultrafast optics
(320.2250) Ultrafast optics : Femtosecond phenomena
(320.7090) Ultrafast optics : Ultrafast lasers
(320.7100) Ultrafast optics : Ultrafast measurements
(320.7120) Ultrafast optics : Ultrafast phenomena

Original Manuscript: June 26, 2003
Published: September 1, 2003

Tai-Hyun Yoon, Eok-Bong Kim, and Seong-Tae Park, "Frequency-stabilized Femtosecond Mode-locked Laser for Optical Frequency Metrology," J. Opt. Soc. Korea 7, 131-134 (2003)

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  1. T. Udem, J. Reichert, R. Holtzwarth, and T. W. Hansch, "Absolute optical frequency measurement of the cesium D1 line with a mode-locked laser," Phys. Rev. Lev., vol. 82, no. 18, pp. 3568-3571, 1999 [CrossRef]
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