Increased fiber communications bandwidth from a resonant cavity light emitting diode emitting at λ=940 nm
1993; American Institute of Physics; Volume: 63; Issue: 19 Linguagem: Inglês
10.1063/1.110443
ISSN1520-8842
AutoresN. E. J. Hunt, E. F. Schubert, R. F. Kopf, D.L. Sivco, A. Y. Cho, G. J. Zydzik,
Tópico(s)Optical Network Technologies
ResumoSubstrate-emitting InGaAs/AlGaAs resonant cavity light emitting diodes (RCLEDs) emitting at λ=940 nm have been fabricated for use in optical communications. The devices exhibit a high output efficiency, with a far-field intensity of 85 μW/Steradian from a planar surface at a current of 14 mA. The spontaneous spectrum exhibits a very narrow peak of only 5 nm width, as opposed to the 50-nm-wide peak of an 875 nm wavelength reference LED. We show that the narrow spectrum drastically reduces the effects of chromatic dispersion within a 3.37 km length of 62.5 μm core graded index multimode fiber. The resulting −3 dB frequency is 102 MHz for the RCLED and fiber system, as opposed to only 33 MHz for the chromatic dispersion limited reference device.
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