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Optica Publishing Group
  • Conference on Lasers and Electro-Optics
  • OSA Technical Digest (Optica Publishing Group, 2001),
  • paper CML3

Beam Quality Issues for Mid-Infrared Angted-Gratlng Distributed Feedback Lasers

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Abstract

Considerable effort has been expended to develop semiconductor lasers that simultaneously exhibit both high output power and good beam quality. A promising approach is the angled-grating distributed-feedback laser (α-DFB),1,2 in which a diffraction grating is etched into the laser cavity at an angle 6 with respect to the facets. Fig. 1(b) illustrates the α-DFB geometry alongside a simple broad-area Fabry-Perot laser configuration [Fig. 1(a)). Both the cavity facets and the grating are necessary to produce angular-selective optical feedback in the a-DFB laser. We recently reported the first α-DFB lasers emitting in the mid-IR.3,4

© 2001 Optical Society of America

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