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Optica Publishing Group
  • International Conference on Quantum Electronics
  • OSA Technical Digest (Optica Publishing Group, 1988),
  • paper MB3

Fundamental Mode Enhancement in Broad-Area Devices and Arrays by Lateral Index Tailoring

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Abstract

Broad-area diode lasers and laser arrays are presently the subject of considerable interest due to their potential as compact, efficient, high power optical and near-infrared sources. The focus of much of this recent work has been the modal emission properties of these devices, and in particular, those factors that promote fundamental mode emission. In this presentation, we show, by both experimental studies and theoretical modeling, that the modal emission properties of these devices operating in a cw or long-pulse mode depend strongly upon junction heating. In particular, our experiments[1] demonstrate selective modal control in a 60-μm wide broad-area device by externally modifying the active region temperature profile and thus tailoring the effective index profile. Our studies suggest that a suitable lateral index profile incorporated into the structure of a broad-area laser could provide an effective means of realizing fundamental mode operation in these devices.

© 1988 Optical Society of America

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