We present a detailed analysis of the output beam of high-power edge-emitting angled tapered super-luminescent LEDs (A-TSLEDs). A device model, including spontaneous and stimulated emission processes as well as, the typical nonuniform carrier-density distribution due to current spreading and carrier diffusion, has been developed and used to interpret the experimentally obtained characteristics of inhouse-fabricated A-TSLEDs. The good match between measured and theoretical results indicates that the model reproduces the A-TSLED operation very satisfactorily and clearly explains the role of the collecting lens on the pronounced asymmetry of some of the measured optical intensity profiles. (C) 2002 Optical Society of America.
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|Published - 2002