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Optics Letters

Optics Letters


  • Editor: Anthony J. Campilo
  • Vol. 32, Iss. 17 — Sep. 1, 2007
  • pp: 2553–2555

Spectrally resolved optical frequency comb from a self-referenced 5 GHz femtosecond laser

A. Bartels, R. Gebs, M. S. Kirchner, and S. A. Diddams  »View Author Affiliations

Optics Letters, Vol. 32, Issue 17, pp. 2553-2555 (2007)

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We report a mode-locked Ti:sapphire femtosecond laser with 5 GHz repetition rate. Spectral broadening of the 24 fs pulses in a microstructured fiber yields an octave-spanning spectrum and permits self-referencing and active stabilization of the emitted femtosecond laser frequency comb (FLFC). The individual modes of the 5 GHz FLFC are resolved with a high-resolution spectrometer based on a virtually imaged phased array spectral disperser. Isolation of single comb elements at a microwatt average power level is demonstrated. The combination of the high-power, frequency-stabilized 5 GHz laser and the straightforward resolution of its many modes will benefit applications in direct frequency comb spectroscopy. Additionally, such a stabilized FLFC should serve as a useful tool for direct mode-by-mode Fourier synthesis of optical waveforms.

© 2007 Optical Society of America

OCIS Codes
(120.3940) Instrumentation, measurement, and metrology : Metrology
(140.7090) Lasers and laser optics : Ultrafast lasers
(320.7160) Ultrafast optics : Ultrafast technology

ToC Category:
Ultrafast Optics

Original Manuscript: July 9, 2007
Manuscript Accepted: July 17, 2007
Published: August 21, 2007

A. Bartels, R. Gebs, M. S. Kirchner, and S. A. Diddams, "Spectrally resolved optical frequency comb from a self-referenced 5 GHz femtosecond laser," Opt. Lett. 32, 2553-2555 (2007)

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