The optical fibers tend to have poor machinability because of its hardness and brittleness. In the previous study, we applied the electrochemical discharge machining to fabricate the tip of the optical fiber. We could machine the optical fiber using the electrochemical discharge machining however the machined optical fiber tip had rough surface. In this study, we use electrochemical discharge machining with rotation tool which of the rough-grinding and finishing-grinding process to obtain a smooth surface of the side firing fiber. As a result, we are able to machine the optical fiber tip with smooth surface effectively from the proposed fiber machining process and the emission from the side-firing fiber clearly demonstrated the directional emission as the emission beam was reflected at 80 ° relative to the fiber axis.

• 이호(Member, School of Mechanical Engineering, Kyungpook National University) | Ho Lee Corresponding author
• 김창환(School of mechanical design & manufacturing of Busan institute of science and technology) | Chang-hwan Kim