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Ring and axis mode switching in multielectrode strained InGaAsP multiple-quantum-well quasistadium laser diodes

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3 Author(s)
Fukushima, T. ; Department of Communication Engineering, Okayama Prefectural University, 111 Kuboki, Soja, Okayama 719-1197, Japan and Department of Nonlinear Science, ATR Wave Engineering Laboratories, 2-2-2 Hikaridai, Seika-cho, Soraku-gun, Kyoto 619-0288, Japan ; Tanaka, Tomoko ; Harayama, T.

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We describe the mode switching operation of multielectrode strained InGaAsP multiple-quantum-well quasistadium laser diodes. Far-field patterns exhibit highly directional emission along the laser cavity axis for current injection at the axis electrode and highly directional emission at angles ±19° from the cavity axis for current injection at the ring electrode. These directions correspond to the axis mode and the ring trajectory mode of the laser cavity. We also succeeded in obtaining single peak output beams using narrow curved end mirrors of 40 μm width.

Published in:

Applied Physics Letters  (Volume:87 ,  Issue: 19 )