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Blue superluminescent light-emitting diodes with output power above 100mW for picoprojection

 
: Kopp, F.; Eichler, C.; Lell, A.; Tautz, S.; Ristic, J.; Stojetz, B.; Höß, C.; Weig, T.; Schwarz, U.T.; Strauss, U.

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Japanese journal of applied physics 52 (2013), No.8, Art. 08JH07, 5 pp.
ISSN: 0021-4922
ISSN: 1347-4065
English
Journal Article
Fraunhofer IAF ()

Abstract
We present a blue InGaN research and development superluminescent light-emitting diode (SLED) that is suitable for picoprojection. The SLED reaches an output power of > 100mW with a peak wavelength of 443nm and a spectral bandwidth of > 2.6 nm as well as a single-mode far-field driven in cw mode at 25 °C. In order to figure out an optimized waveguide design, which enables such a high output power at lowest operation current, we compare the performance of diodes with curved and tilted shaped ridges in detail, using the lasing threshold current as a criterion for lasing or superluminescence, respectively.

: http://publica.fraunhofer.de/documents/N-247093.html