Abstract

Low loss splicing of silica fibers by means of a 5-W CO2 laser has been demonstrated. Step-index fibers with a core diameter of 56 μm and an outer diameter of 154 μm were fused together. The chopped laser beam, effectively 2.3 W and about 1.0 mm in beam-spot diameter, was moved across the fiber ends at a speed of 10 μm/sec. Ninety percent of twenty-one splices had losses less than 0.12 dB with a minimum loss of 0.02 dB. Good reproducibility of the low loss splice was achieved by contacting the fibers tightly before fusing them together.

© 1977 Optical Society of America

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