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Journal of the Optical Society of America B

Journal of the Optical Society of America B


  • Editor: Henry M. Van Driel
  • Vol. 24, Iss. 11 — Nov. 1, 2007
  • pp: 2914–2920

Dual-channel amplification in a single-mode diode laser for multi-isotope laser cooling

James L. Booth, Janelle Van Dongen, Paul Lebel, Bruce G. Klappauf, and Kirk W. Madison  »View Author Affiliations

JOSA B, Vol. 24, Issue 11, pp. 2914-2920 (2007)

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The output from two grating-stabilized external-cavity diode lasers were injected into a single-mode diode laser. Operating at a wavelength of 780 nm , this laser produced 50 mW of power with two main frequency components of the same spectral characteristics of the seed lasers. The power ratio of the amplified components was freely adjustable due to gain saturation, and amplification was observed for frequency differences of the two seed lasers in the range from 73 MHz to 6.6 GHz . This system was used to realize a dual isotope magneto-optic trap (MOT) for rubidium ( Rb 85 and Rb 87 ). The resulting position and cloud size of the dual isotope MOT was the same as that of the single species MOTs to within ± 10 and ± 20 μ m , respectively. We also characterized the additional spectral components produced by four wave mixing (FWM) in the diode laser amplifier and utilized a particular FWM sideband to realize hyperfine pumping and subsequent laser trapping of Rb 85 in the absence of a “repump” laser dedicated to hyperfine pumping.

© 2007 Optical Society of America

OCIS Codes
(020.7010) Atomic and molecular physics : Laser trapping
(140.2020) Lasers and laser optics : Diode lasers
(140.3280) Lasers and laser optics : Laser amplifiers
(300.6290) Spectroscopy : Spectroscopy, four-wave mixing
(300.6310) Spectroscopy : Spectroscopy, heterodyne
(020.3320) Atomic and molecular physics : Laser cooling

ToC Category:
Atomic and Molecular Physics

Original Manuscript: August 20, 2007
Revised Manuscript: September 11, 2007
Manuscript Accepted: September 12, 2007
Published: October 31, 2007

James L. Booth, Janelle Van Dongen, Paul Lebel, Bruce G. Klappauf, and Kirk W. Madison, "Dual-channel amplification in a single-mode diode laser for multi-isotope laser cooling," J. Opt. Soc. Am. B 24, 2914-2920 (2007)

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