A study on Gamma Ray Radiation Effects on Double Pass Backward Superfluorescent Fiber Sources
Date Issued
2007
Date
2007
Author(s)
Hsu, Zhi-Chiang
DOI
en-US
Abstract
In this thesis, the optimal mean-wavelength stable double pass backward superfluorescent fiber sources (DPB SFS) were made by three different kinds of EDF. The variation due to temperature would be least in this design. At the same time, a theoretical model of DPB SFS was used to analysis the characteristics including mean wavelength stability, linewidth and output power. According to the measured results, the optimal length would be highly related by the concentration of Erbium ions.
When applied in artificial satellites as light sources of fiber optical gyroscopes, the space radiation in this environment would cause power loss and mean wavelength drift in DPB SFS. We used Co60 irradiation source to simulate the environment of low orbital satellites. The mean-wavelength drift was highly depended on the pump power loss. The total power loss not only depended on the lengths of Erbium doped fibers, but also depended on the concentration of the Erbium ions and the Aluminum ions. We also built a model to simulate the power loss and mean-wavelength drift of DPB SFS in space environment. According to our research, the power loss in low-orbital environment was less than 2dB and the mean-wavelength drift was less than 5nm for a seven-year mission.
Subjects
超螢光光纖光源
複行後向
摻鉺光纖
珈瑪射線輻射
Superfluorscent fiber source
Double-pass backward
Erbium doped fiber
Gamma-ray irradiation
Type
thesis
File(s)![Thumbnail Image]()
Loading...
Name
ntu-96-R94941066-1.pdf
Size
23.31 KB
Format
Adobe PDF
Checksum
(MD5):49886bbdf17c3000494fe8db0bf8271c