Accession Number:

ADA048361

Title:

Effects of Gamma Radiation on Gallium-Arsenide Lasers.

Descriptive Note:

Master's thesis,

Corporate Author:

AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OHIO SCHOOL OF ENGINEERING

Personal Author(s):

• Ackermann,Harro

Report Date:

1977-12-01

Pagination or Media Count:

64.0

Abstract:

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 RadSi 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.

Descriptors:

• *INJECTION LASERS
• *GAMMA RAYS
• *RADIATION DAMAGE
• *GALLIUM ARSENIDE LASERS
• DEGRADATION
• THESES
• CONTINUOUS WAVE LASERS
• COBALT

Subject Categories:

• Lasers and Masers
• Radioactivity, Radioactive Wastes and Fission Products

Distribution Statement:

APPROVED FOR PUBLIC RELEASE