| Summary: | 碩士 === 國立虎尾科技大學 === 機械與機電工程研究所 === 97 === In this project, we proposed a method to fabricate a D-shaped optical fiber of Bragg surface grating filter component by D-shaped fiber polishing along with photolithography、holographic interference lithography technologies and micro-molding process.
First , we will do side-polished on multi-mode fiber. It will precisely stop polishing until it reaches the core of fiber. Next, we will fabricate the diffraction grating filter component through photolithography process and holography interference lithography. It utilizes spinner to spin coating photoresister , and then the positive photoresist on D-Shaped fibers short periodic Bragg surface grating will be fabricated on glass substrate and as a diffraction grating element the use of PDMS as the transfer characteristics.
Finally, we accurately reproduce the characteristics of the grating on the surface of optical fiber by using micro-molding process. By this method, we can fabricate a low loss transmission whole fibered D-shaped optical fiber grating filter. Its period and depth of grating is observed by atomic force microscope (AFM), and the results of optical transmission characteristics are measured and shown by ASE broadband light source and in-line optical fiber polarizer though optical spectrum analyzer(OSA).
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