Original Paper

Rubidium spectroscopy at 778–780 nm with a distributed feedback laser diode

  1. S. Kraft,
  2. A. Deninger2,
  3. C. Trück1,
  4. J. Fortágh1,
  5. F. Lison2,
  6. C. Zimmermann1

Article first published online: 3 NOV 2004

DOI: 10.1002/lapl.200410155

Issue

Laser Physics Letters

Laser Physics Letters

Volume 2, Issue 2, pages 71–76, February 2005

Additional Information

How to Cite

Kraft, S., Deninger, A., Trück, C., Fortágh, J., Lison, F. and Zimmermann, C. (2005), Rubidium spectroscopy at 778–780 nm with a distributed feedback laser diode. Laser Physics Letters, 2: 71–76. doi: 10.1002/lapl.200410155

Author Information

  1. 1

    Physikalisches Institut, Universität Tübingen, Auf der Morgenstelle 14, 72076 Tübingen, Germany

  2. 2

    TOPTICA Photonics AG, Fraunhoferstraße 14, 82152 Martinsried, Germany

Publication History

  1. Issue published online: 5 JAN 2005
  2. Article first published online: 3 NOV 2004
  3. Manuscript Accepted: 24 OCT 2004
  4. Manuscript Received: 19 OCT 2004

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Keywords:

  • DFB laser diode;
  • rubidium;
  • laser cooling

Abstract

We have performed high resolution spectroscopy of rubidium with a single mode continuous wave distributed feedback (DFB) laser diode. The saturation spectrum of the D2-line of 85Rb and 87Rb was recorded with a resolution close to the natural line width. The emission frequency was actively stabilized to Doppler-free transitions with a relative accuracy of better than 7 parts in 109 using commercially available servo devices only. An output power of 80 mW was sufficient to allow for two-photon spectroscopy of the 5S-5D-transition of 87Rb. Further, we report on the spectral properties of the DFB diode, its tuning range and its frequency modulation properties. The line width of the diode laser, determined with high resolution Doppler free two photon spectroscopy, was 4 MHz without applying any active stabilization techniques. For time scales below 5 μs the line width drops below 2 MHz. (© 2005 by Astro, Ltd. Published exclusively by WILEY-VCH Verlag GmbH & Co. KGaA)

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