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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 48, Iss. 2 — Jan. 10, 2009
  • pp: 365–370

Linewidth reduction of a broad-area laser diode array in a compound external cavity

Bo Liu, Yun Liu, and Yehuda Braiman  »View Author Affiliations


Applied Optics, Vol. 48, Issue 2, pp. 365-370 (2009)
http://dx.doi.org/10.1364/AO.48.000365


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Abstract

A compound external cavity is designed and implemented to achieve a homogeneous spectrum distribution of broad area laser diodes in an array and to narrow the spectral linewidth of the entire array. The compound external cavity is composed of an optical coupler and a Littrow external cavity with a telescope along the fast axis. The inhomogeneous distribution of individual laser diodes spectrum generated by the “smile” effect was reduced by the telescope. The effective transverse coupling among individual laser diodes in an array was enhanced by the optical coupler, which further reduced the spectrum inhomogeneous distribution of the entire array. The spectral linewidth of a 49-emitter laser array is reduced to 0.1 nm at the output power of 12.5 W .

© 2009 Optical Society of America

OCIS Codes
(140.2010) Lasers and laser optics : Diode laser arrays
(140.3410) Lasers and laser optics : Laser resonators

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: July 10, 2008
Revised Manuscript: October 14, 2008
Manuscript Accepted: November 13, 2008
Published: January 8, 2009

Citation
Bo Liu, Yun Liu, and Yehuda Braiman, "Linewidth reduction of a broad-area laser diode array in a compound external cavity," Appl. Opt. 48, 365-370 (2009)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-48-2-365

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