Linewidth reduction in a large-smile laser diode array
Applied Optics, Vol. 44, Issue 29, pp. 6264-6268 (2005)
http://dx.doi.org/10.1364/AO.44.006264
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Abstract
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
Citation
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)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-44-29-6264
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