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Title: Neutron and gamma radiation effects on GaaLaS laser diodes. Final report

Abstract

The effects of two kinds of radiation on the performance of double heterojunction aluminum-gallium-arsenide (AlGaAs) laser diodes were investigated. One set of diodes received neutron radiation in a nuclear reactor; another set was exposed to gamma radiation from a cobalt-60 source. Each set contained two types of lasers, an RCA C30127 and a Laser Diode Laboratories LCW-10, both designed to operate continuously at room temperature. At neutron fluences of 10 to the 14th power n/sq cm, both types of diodes showed significant decreases in power output and external quantum efficiency, and increases in threshold current. There was no significant change in bias voltage versus forward current or in spectral composition of the light outputs at neutron fluences up to 10 to the 15th power n/sq cm. Under gamma radiation, the C30127 laser exhibited rapid degradation. A dosage of 10 to the 4th power rad(Si) reduced the output power by half. Threshold current, efficiency, and intensity distribution were all adversely affected. The damage factor at constant voltage was 1.5 x 10 to the minus 7th power rad to the minus 1 power. The LCW-10 performance improved to a dosage of 10 to the 6th power rad(Si) before degradation began. After 10more » to the 8th power rad(Si), power output was still comparable to preirradiation values. Beam characteristics were not appreciably altered. The damage factor at constant voltage was 4 x 10 to the minus 8th power rad to the minus 1 power.« less

Authors:
;
Publication Date:
Research Org.:
Air Force Weapons Lab., Kirtland AFB, NM (USA)
OSTI Identifier:
6358799
Report Number(s):
AD-A-091795
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; SEMICONDUCTOR DIODES; RADIATION EFFECTS; SEMICONDUCTOR LASERS; ALUMINIUM ARSENIDES; COBALT; COBALT 60; ELECTRIC CURRENTS; GALLIUM ARSENIDES; GAMMA SOURCES; IRRADIATION; PERFORMANCE; REACTORS; ALUMINIUM COMPOUNDS; ARSENIC COMPOUNDS; ARSENIDES; BETA DECAY RADIOISOTOPES; BETA-MINUS DECAY RADIOISOTOPES; COBALT ISOTOPES; CURRENTS; ELEMENTS; GALLIUM COMPOUNDS; INTERMEDIATE MASS NUCLEI; INTERNAL CONVERSION RADIOISOTOPES; ISOMERIC TRANSITION ISOTOPES; ISOTOPES; LASERS; METALS; MINUTES LIVING RADIOISOTOPES; NUCLEI; ODD-ODD NUCLEI; PNICTIDES; RADIATION SOURCES; RADIOISOTOPES; SEMICONDUCTOR DEVICES; TRANSITION ELEMENTS; YEARS LIVING RADIOISOTOPES; 420300* - Engineering- Lasers- (-1989); 440200 - Radiation Effects on Instrument Components, Instruments, or Electronic Systems

Citation Formats

Ackerman, H, and Walsh, Jr, T E. Neutron and gamma radiation effects on GaaLaS laser diodes. Final report. United States: N. p., 1980. Web.
Ackerman, H, & Walsh, Jr, T E. Neutron and gamma radiation effects on GaaLaS laser diodes. Final report. United States.
Ackerman, H, and Walsh, Jr, T E. Fri . "Neutron and gamma radiation effects on GaaLaS laser diodes. Final report". United States.
@article{osti_6358799,
title = {Neutron and gamma radiation effects on GaaLaS laser diodes. Final report},
author = {Ackerman, H and Walsh, Jr, T E},
abstractNote = {The effects of two kinds of radiation on the performance of double heterojunction aluminum-gallium-arsenide (AlGaAs) laser diodes were investigated. One set of diodes received neutron radiation in a nuclear reactor; another set was exposed to gamma radiation from a cobalt-60 source. Each set contained two types of lasers, an RCA C30127 and a Laser Diode Laboratories LCW-10, both designed to operate continuously at room temperature. At neutron fluences of 10 to the 14th power n/sq cm, both types of diodes showed significant decreases in power output and external quantum efficiency, and increases in threshold current. There was no significant change in bias voltage versus forward current or in spectral composition of the light outputs at neutron fluences up to 10 to the 15th power n/sq cm. Under gamma radiation, the C30127 laser exhibited rapid degradation. A dosage of 10 to the 4th power rad(Si) reduced the output power by half. Threshold current, efficiency, and intensity distribution were all adversely affected. The damage factor at constant voltage was 1.5 x 10 to the minus 7th power rad to the minus 1 power. The LCW-10 performance improved to a dosage of 10 to the 6th power rad(Si) before degradation began. After 10 to the 8th power rad(Si), power output was still comparable to preirradiation values. Beam characteristics were not appreciably altered. The damage factor at constant voltage was 4 x 10 to the minus 8th power rad to the minus 1 power.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1980},
month = {8}
}

Technical Report:
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