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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 12 — Jun. 8, 2009
  • pp: 9503–9508

High power single–frequency continuously–tunable compact extended–cavity semiconductor laser

A. Laurain, M. Myara, G. Beaudoin, I. Sagnes, and A. Garnache  »View Author Affiliations

Optics Express, Vol. 17, Issue 12, pp. 9503-9508 (2009)

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We demonstrate high power high efficiency (0.3 W) low noise single frequency operation of a compact extended–cavity surface–emitting–semiconductor–laser exhibiting a continuous tunability over 0.84 THz with high beam quality. We took advantage of thermal lens–based stability to develop a short (<3 mm) plano–plano external cavity without any intracavity filter. The structure is optically pumped by a 1W commercial 830 nm multimode diode laser. No heat management was required. We measured a low divergence circular TEM00 beam at the diffraction limit (M2<1.05) with a linear light polarization (>37 dB). The side mode suppression ratio is 60 dB. The free running laser linewidth is 850 kHz limited by pump induced thermal fluctuations. Thanks to this high-Q external cavity approach, the frequency noise is low and the dynamics is in the relaxation-oscillation-free regime, exhibiting a low intensity noise, with a cutoff frequency ~250MHz above which the shot noise level is reached. We show that pump properties define the cavity design and laser coherence.

© 2009 Optical Society of America

OCIS Codes
(140.3570) Lasers and laser optics : Lasers, single-mode
(140.5960) Lasers and laser optics : Semiconductor lasers
(250.7260) Optoelectronics : Vertical cavity surface emitting lasers
(270.2500) Quantum optics : Fluctuations, relaxations, and noise

ToC Category:
Lasers and Laser Optics

Original Manuscript: January 23, 2009
Revised Manuscript: March 10, 2009
Manuscript Accepted: March 10, 2009
Published: May 22, 2009

A. Laurain, M. Myara, G. Beaudoin, I. Sagnes, and A. Garnache, "High power single–frequency continuously–tunable compact extended–cavity semiconductor laser," Opt. Express 17, 9503-9508 (2009)

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