Space as an Adverse Environment: Vacuum Surface and Gamma Ray Irradiation Effects on LED's and Photodiodes

S. Hava; N. S. Kopeika

doi:10.1117/12.937621

4 February 1987 Space as an Adverse Environment: Vacuum Surface and Gamma Ray Irradiation Effects on LED's and Photodiodes

S. Hava, N. S. Kopeika

Author Affiliations +

Proceedings Volume 0721, Fiber Optics in Adverse Environments III; (1987) https://doi.org/10.1117/12.937621
Event: Cambridge Symposium-Fiber/LASE '86, 1986, Cambridge, MA, United States

Abstract

Vacuum surface and gamma-ray irradiation effects on photodiodes and LED's play a significant role in the optical and electronic properties of these diodes, particularly in a space environment, which involves both ionizing radiation as well as vacuum conditions. Exposure of GaAs light emitting diodes (LED's) to vacuum gives rise to desorption of surface-adsorbed gases and subsequent free charge diffusion and redistribution that significantly alter diode properties. Changes in photodiode properties due to vacuum operation and y-radiation have also been observed. These changes are given, and a model explaining the changes is presented.

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S. Hava and N. S. Kopeika "Space as an Adverse Environment: Vacuum Surface and Gamma Ray Irradiation Effects on LED's and Photodiodes", Proc. SPIE 0721, Fiber Optics in Adverse Environments III, (4 February 1987); https://doi.org/10.1117/12.937621

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