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The effect of lateral leakage current on the experimental gain/current-density curve in quantum-well ridge-waveguide lasers

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4 Author(s)
Hu, S.Y. ; Dept. of Electr. & Comput. Eng., California Univ., Santa Barbara, CA, USA ; Young, D.B. ; Gossard, A.C. ; Coldren, L.A.

We stress the importance of considering the effect of lateral leakage current on the material gain/current-density characteristics measured from ridge-waveguide diode lasers. It is found that the inclusion of lateral leakage current is crucial to obtaining a self-consistent result. An experimental demonstration has been performed on an In0.2Ga0.8As/AlGaAs strained single quantum-well laser sample, from which a gain curve with transparency current density of 53.8 A/cm2 was obtained. By using devices of different geometries, the variation of leakage currents is measured and the accuracy of the resultant gain curves is discussed

Published in:

Quantum Electronics, IEEE Journal of  (Volume:30 ,  Issue: 10 )