METHOD FOR CUTTING-OFF WIRE MATERIAL, AND METHOD FOR RE-FORMING END FACE OF WIRE MATERIAL

摘要

PROBLEM TO BE SOLVED: To form a flat end face of the cut-off end face produced by cutting-off a wire material, such as photonic crystal fiber (PCF), and further to achieve an excellent optical property by preventing polishing abrasive grains from intruding into pores exposed on the end face.

SOLUTION: The wire material is cut off along a locus of a machining spot caused by a converged light point by forming the converged light point of a femto second laser beam on the surface portion or the inside of the wire material, such as PCF, along a required scanning path. Further, the end face of the wire material is smoothed by irradiating the end face with the femto second laser beam.

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