Abstract

Several methods of fabricating fused-fiber couplers have been reported.1–5 The coupler which appears to be generating the most interest is that which uses the biconical taper technique.2 The tapered region in these couplers is drawn to a small diameter and is typically suspended in air, since direct contact with a potting compound can degrade performance. This air suspension can complicate package design for high mechanical reliability, hermeticity, and/or high-pressure applications. Other coupler fabrication techniques generally require precision cleaving and tapering for fusion between matched fiber endfaces.3–5

© 1985 Optical Society of America

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