Change in FWHM of AlGaAs LEDs subjected to mixed neutron and gamma radiation

Joel M. Hatch

doi:10.1117/12.187426

28 September 1994 Change in FWHM of AlGaAs LEDs subjected to mixed neutron and gamma radiation

Joel M. Hatch

Proceedings Volume 2290, Fiber Optic Materials and Components; (1994) https://doi.org/10.1117/12.187426
Event: SPIE's 1994 International Symposium on Optics, Imaging, and Instrumentation, 1994, San Diego, CA, United States

Abstract

AlGaAs light emitting diodes were irradiated in a mixed neutron/gamma environment produced by a research reactor operating at steady state power levels. Changes in the DUTs power and spectral output were measured following an annealing period of 24-30 hours. The LED's total output power decreased with increasing fluence, and the device's spectral output/full width half maximum peaks shifted. Initially, the LED radiated light at two output peak wavelengths of 820 and 890 nm. Following a cumulative irradiation of approximately equals 10¹⁶ n/cm² (GaAs), the second radiation peak was reduced to less than 0.5% of the DUT's total output power, and the lower peak shifted to a longer wavelength of 833 nm.

Citation Download Citation

Joel M. Hatch "Change in FWHM of AlGaAs LEDs subjected to mixed neutron and gamma radiation", Proc. SPIE 2290, Fiber Optic Materials and Components, (28 September 1994); https://doi.org/10.1117/12.187426

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