payload with the 1.244-Gb/s label was demonstrated. The results showed small power penalty as much as 0.2 dB in payload transmission, which arises from crosstalk with the label, and the CS-SH-SCM labeling technique showed increased capability for multiple-span transmission of the payload with successive label swapping.
ACKNOWLEDGMENTThis work was partially supported by the Korean Science and Engineering Foundation (KOSEF) through the OIRC project.
A focused carbon dioxide laser beam is used to microstructure fibers that have already been narrowed by conventional fiber tapering. We describe three new miniature devices made with this technique: a fused fiber microcoupler with an interaction length of 200 mum, a long-period grating made from a periodic chain of microtapers, and a new type of prolate whispering-gallery mode microcavity.
We report the development of a fiber taper and fused-fiber coupler fabrication rig that uses a scanning, focused, CO(2) laser beam as the heat source. As a result of the pointlike heat source and the versatility associated with scanning, tapers of any transition shape and uniform taper waist can be produced. Tapers with both a linear shape and an exponential transition shape were measured. The taper waist uniformity was measured and shown to be better than +/-1.2%. The rig was also used to make fused-fiber couplers. Couplers with excess loss below -0.1 dB were routinely produced.
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