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Conferences > SLA > 1987 > WB > WB3

150 mW Quasi-CW Fundamental-Mode Operation From Modified Twin-Channel Laser

C. B. Morrison, L. M. Zinkiewicz, A. Burghard, and D. Botez

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Abstract

The twin-channel laser (TCL)(1) consists of two (substrate) channels separated by a shallow mesa, with current confinement provided by back-biased pn junctions on both sides of the structure. Due to enhanced gain above the mesa, the symmetric mode is favored to lase(1~4). Thus stable fundamentalmode operation to powers around 100 mW has been achieved(5). However, above ~100 mW the beam shifts and broadens as a result of spatial hole burning. Here we present a modified TCL device, which, while preserving symmetric-mode lasing, operates in a significantly stabler and narrower beam than the TCL device.

© 1987 Optical Society of America

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