Radiation effects on the optical fiber applied in telecommunication

• Main Authors: H.T. Hans Tseng, 曾恆次
• Other Authors: Liq-Ji Yuan
• Format: Others
• Language: zh-TW
• Published: 2000
• Online Access: http://ndltd.ncl.edu.tw/handle/98073659430916293180

碩士 === 國立清華大學 === 原子科學系 === 88 === ABSTRACT Optical fiber possesses the characteristics of broader band, faster transmission speed and no electronic magnetic interference etc., which has been broadly applied in the field of telecommunication in the last decade. On the other hand, in some specific high radiation zones such as nuclear power plant, space satellite etc., the increasing application of optical transmission facilities has been become a consequential trend. As far as radiation effects being concerned the related organizations such as European Space Agency (ESA), National Aeronautics and Space Administration (NASA), Goddard Space Flight Center/Swales Aerospace are all proceeding a series of tests on optical communication parts such as splitter, wave length multiplexer, optical fiber, OFC, connector, patch cord…etc. For the purpose of controlling their characteristics under radiation field, the major purpose of this research is testing Corning company’s single mode & multimode optical fiber by means of 60Co irradiation. In the mean time, we were measuring induced attenuation by on-line monitoring, and studying the situation after irradiation. This project is also comparing with the results that have been achieved by the other nations. Besides, we were measuring attenuation by means of OTDR (Optical Time Domain Reflectometers) on single mode optical fiber applied in 1310nm & 1550nm wave length and multimode optical fiber applied in 850nm & 1310nm wave length. This test result showing that the attenuation is remarkably increasing during 3kGy(Si) irradiation. Multimode optical fiber applied in 850nm wave length is not available as its spectrum of OTDR is full of noise although its attenuation was not high. As to annealing, testing results were not good at full temperature range but just appropriate at the temperature of 35℃.