A new method for obtaining good fiber ends with the help of a CO2 laser is described. In principle, the fiber is exposed to a focused CO2 laser beam and then fractured by applying tensile stress. Average coupling losses of a step-index and a graded-index multimode fiber, whose endfaces were prepared by this method, were both 0.35 dB without index-matching fluid. Average splice losses of these fibers were 0.05–0.06 dB, when their ends were fused with a CO2 laser.
© 1978 Optical Society of America
K. Kinoshita and K. Egashira, "Optical fiber end preparation using a CO2 laser," Appl. Opt. 17, 1210-1212 (1978)