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|Type of Document
||Fabrication and Characteristics of Ce-Doped Fibers by Drawing Tower Technique|
|Date of Defense
||In this study, the fabrication of broadband fluorescence Ce-doped fibers (CeDFs) with rod-in-tube (RIT) technique by using drawing tower process is proposed and demonstrated.|
A preform was assembled by both the Ce:YAG rod doped with 0.1at% Ce3+-ion which acts as core and the multilayer silica tubes as cladding. The outer and inner diameters of the silica tubes are 20 and 3mm, respectively. Then, a RIT preform was employed by inserting the Ce:YAG crystal rod of 4cm length and 2mm diameter into the silica tube. The drawing CeDFs with a 16μm core and a 125μm cladding was measured to have 13.9nW/nm fluorescent power density between wavelength 500-700nm.
In order to improve the fluorescent power density behavior of CeDFs, we used another Ce:YAG rod with higher Ce3+-ion concentration of 0.3at% and inserted it to the multilayer silica tubes of the same size to made another modified preform. As a result, drawing CeDFs with 10μm core and 125μm cladding showed 19.6nW/nm of the fluorescent power density between wavelength 500-700nm.
The drawing CeDFs showed the fluorescence spectrum between 500-700nm. Due to the broad band, short wavelength and near Gaussian distribution characteristics, the CeDFs provides a useful application on OCT systems as the light source. The 10μm core CeDF we fabricated was simulated to have 1.43μm axis resolution in air. Besides, the CeDFs fabricated by drawing tower have the same cladding diameter with commercial single mode fiber. Therefore, it can cooperate with the fully developed optical communication component, and has more potential to commercialize CeDFs.
||Sheng-Lung Huang - chair|
Chin-Ping Yu - co-chair
Ray-Hua Horng - co-chair
Yi-Chung Huang - co-chair
Wood-Hi Cheng - advisor
Indicate in-campus at 5 year and off-campus access at 5 year.|
|Date of Submission