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Optica Publishing Group
  • Conference on Lasers and Electro-Optics
  • OSA Technical Digest (Optica Publishing Group, 1993),
  • paper CWA8

Narrow spectral emission and high output efficiencies from resonant cavity light-emitting diodes at 0.94-μm wavelength

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Abstract

Microcavities have received much recent attention with respect to demonstrating fundamental changes in the spontaneous emission rates and spontaneous spectra of emitting media Recently,1,2 it has been realized that microcavity effects may be used to enhance the intensity while narrowing the spectrum of light-emitting diodes (LEDs) for fiber communications. In this work, we demonstrate for the first time both high external quantum efficiencies and narrow line width in electrically pumped resonant cavity light-emitting diodes (RCLEDs) operating in the range of 0. 92 μm to 0.96μm. While vertical cavity lasers typically require greater than 99% reflectivity-distributed Bragg reflector (DBR) mirrors on top and bottom to achieve net gain, an RCLED typically requires mirrors with 80-97% reflectivity and relies only on the modification of spontaneous emission for its operation. Spontaneously emitting LEDs are preferred over devices with optical gain for short-distance communication owing to their reliability and greater insensitivity to temperature changes.

© 1993 Optical Society of America

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