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Applied Optics

Applied Optics


  • Editor: Glenn D. Boreman
  • Vol. 44, Iss. 29 — Oct. 10, 2005
  • pp: 6264–6268

Linewidth reduction in a large-smile laser diode array

C. L. Talbot, M. E. J. Friese, D. Wang, I. Brereton, N. R. Heckenberg, and H. Rubinsztein-Dunlop  »View Author Affiliations

Applied Optics, Vol. 44, Issue 29, pp. 6264-6268 (2005)

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We present theory and simulations for a spectral narrowing scheme for laser diode arrays (LDAs) that employs optical feedback from a diffraction grating. We calculate the effect of the so-called smile of the LDA and show that it is possible to reduce the effect by using a cylindrical lens set at an angle to the beam. The scheme is implemented on a 19-element LDA with smile of 7.6 μm and yields frequency narrowing from a free-running width of 2 to 0.15 nm. The experimental results are in good agreement with the theory.

© 2005 Optical Society of America

OCIS Codes
(140.0140) Lasers and laser optics : Lasers and laser optics
(140.2010) Lasers and laser optics : Diode laser arrays
(140.3300) Lasers and laser optics : Laser beam shaping

ToC Category:
Lasers and Laser Optics

Original Manuscript: January 7, 2005
Revised Manuscript: April 8, 2005
Manuscript Accepted: April 13, 2005
Published: October 10, 2005

C. L. Talbot, M. E. J. Friese, D. Wang, I. Brereton, N. R. Heckenberg, and H. Rubinsztein-Dunlop, "Linewidth reduction in a large-smile laser diode array," Appl. Opt. 44, 6264-6268 (2005)

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