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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 15, Iss. 19 — Sep. 17, 2007
  • pp: 12344–12355

Amplification and Front Facet Reflectivity of Broad Area Lasers

Aviv Keshet, Peter Eugster, Paul Bloudoff, Bruce G. Klappauf, and KirkW. Madison  »View Author Affiliations

Optics Express, Vol. 15, Issue 19, pp. 12344-12355 (2007)

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The effect of front-facet reflectivity on the amplification performance of Broad Area Laser (BAL) diodes in a double-pass configuration is studied experimentally. A method to measure the front facet reflectivities of laser diodes is generalized to BALs. The method is based on fitting a model, with front facet reflectivity as a parameter, to the threshold current vs. external feedback of the diode. Reflectivities of three BAL diodes are measured, and their amplification abilities have been assessed. The tested diodes had amplification factors of 0, 1, and 10 and front facet reflectivities of 12.7±1%, 4.6±0.4%, and 1.2±0.2% respectively. It is concluded that a front facet modal reflectivity of less than 4.6% is necessary for a BAL to function as an amplifier.

© 2007 Optical Society of America

OCIS Codes
(140.2020) Lasers and laser optics : Diode lasers
(140.3280) Lasers and laser optics : Laser amplifiers
(140.3460) Lasers and laser optics : Lasers
(140.4480) Lasers and laser optics : Optical amplifiers

ToC Category:
Lasers and Laser Optics

Original Manuscript: June 15, 2007
Revised Manuscript: August 24, 2007
Manuscript Accepted: September 3, 2007
Published: September 13, 2007

Aviv Keshet, Peter Eugster, Paul Bloudoff, Bruce G. Klappauf, and Kirk W. Madison, "Amplification and front facet reflectivity of broad area lasers," Opt. Express 15, 12344-12355 (2007)

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