Browsing by Author "Wu, Yu-Huei"

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Bipolar Cascade Superluminescent Diodes at the 1.04-mu m Wavelength Regime
(2009-03-01)
Guol, Shi-Hao
;
Wang, Jr-Hung
;
Wu, Yu-Huei
;
Lin, Wei
;
Yang, Ying-Jay
In this study, we investigate the performance of GaAs-based bipolar cascade superluminescent diodes with different cavity lengths. The device operates around the important bio-optical therapeutic 1.04-mu m wavelength window. The introduction of tunnel junctions tends to minimize the nonuniform carrier distribution between distinct multiple quantum-wells (QWs), which is a problem in conventional SLDs, whose electroluminescent spectra are governed by the center wavelength of QWs near the p-side. Our devices exhibit nice electrical characteristics of low leakage current and overcome the limitation of nonuniform carrier distribution, thereby presenting a promising prospect for the near infrared white-light sources.