Real-Time Fiber Diameter Measurement Technique and Refractive Index Profiles Measurement Technique Applied to Micro-Nano Optical Wires Fabrication
Date Issued
2009
Date
2009
Author(s)
Wan, Meng-Hsun
Abstract
With semiconductor devices become smaller and the transmission speed becomes faster, minimized optical transmission system and the optical integrated circuit are the candidates for future application and development. We utilized a modified-miniature fiber drawing tower to fabricate micro-nano optical wires (MNOWs) from few tens of micrometers down to few hundreds of nanometers scale under controllable conditions. For the necessity of the fiber drawing fabrication process, we develop a real-time diameter measurement system for in situ detecting and adjusting the fabrication parameters. The method is to pass a laser beam through a fiber and characterize its scattering pattern from which the diameter of the fiber is determined. The verification of accuracy and precision was also done. Furthermore, to confirm the light propagation property of the fabricated MNOWs, it is necessary to examine the variation of core and cladding. We utilized a method based on quantitative phase microscopy (QPM), which observe the bright field images of side view of a fiber to measure the refractive index profile along the cross section. From this approach, we can examine the fiber property, and measurements to a few kinds of fibers were done and analyzed.
Subjects
drawing tower
micro-nano optical wire
diameter measurement
scattering pattern method
refractive index profiling
quantitative phase microscopy
Type
thesis
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