Effects of gamma radiation on gallium-arsenide lasers. Master's thesis
The effect of gamma radiation from a Co60 source on the performance of two types of aluminum gallium arsenide injection lasers was investigated. Both types of lasers were designed to operate in the continuous wave mode at room temperature. Measurements were conducted to determine radiation induced changes in the threshold current, power output, efficiency, and spectral and intensity distributions. Damage factors were calculated by the constant voltage and constant current methods. Type C30127 (RCA) exhibited rapid degradation. A dosage of 10000 Rad(Si) reduced the output power by a factor of two. Threshold current increased, efficiency decreased, and the intensity distribution changed drastically. The damage factor at constant voltage was calculated. The performance of LCW-10 (Laser Diode Laboratories, Inc.) improved to a dosage of meg a rad (Si) before the onset of degradation.
- Research Organization:
- Air Force Inst. of Tech., Wright-Patterson AFB, Ohio (USA). School of Engineering
- OSTI ID:
- 6804057
- Report Number(s):
- AD-A-048361; AFIT/GEP/PH-77-1
- Country of Publication:
- United States
- Language:
- English
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