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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 42, Iss. 24 — Aug. 20, 2003
  • pp: 4871–4876

Linewidth reduction by 6 orders of magnitude of a broad-area 729-nm diode laser

Marie Houssin, Philippe Courteille, Caroline Champenois, Mustapha Herbane, Martina Knoop, Michel Vedel, and Fernande Vedel  »View Author Affiliations


Applied Optics, Vol. 42, Issue 24, pp. 4871-4876 (2003)
http://dx.doi.org/10.1364/AO.42.004871


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Abstract

Diode lasers with a power output superior to 100 mW are in widespread use in medical as well as research applications. However, for such diodes lasing oscillation generally occurs simultaneously in several longitudinal and transverse modes that are unsuitable for high-resolution spectroscopy. We spectrally narrow a 100-mW broad-area diode laser by first using an extended cavity and then an electrical feedback produced by a Pound-Drever-Hall stabilization on a low-finesse reference cavity. Reduction of the linewidth by more than 6 orders of magnitude is achieved (the output linewidth is narrowed from 1 THz to less than 500 kHz), making possible its use for high-resolution spectroscopy. The power and the spectral qualities of this diode laser allow us to induce quantum jumps toward the D5/2 metastable level of single Ca+ ions.

© 2003 Optical Society of America

OCIS Codes
(140.0140) Lasers and laser optics : Lasers and laser optics
(140.2020) Lasers and laser optics : Diode lasers
(140.5960) Lasers and laser optics : Semiconductor lasers
(300.3700) Spectroscopy : Linewidth

History
Original Manuscript: January 6, 2003
Revised Manuscript: May 9, 2003
Published: August 20, 2003

Citation
Marie Houssin, Philippe Courteille, Caroline Champenois, Mustapha Herbane, Martina Knoop, Michel Vedel, and Fernande Vedel, "Linewidth reduction by 6 orders of magnitude of a broad-area 729-nm diode laser," Appl. Opt. 42, 4871-4876 (2003)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-42-24-4871


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