Abstract
We demonstrate a highly tunable photonic bandgap fiber, which has a large-core diameter of and an effective mode area of . The tunability is achieved by infiltrating the air holes of a photonic crystal fiber with an optimized liquid-crystal mixture having a large temperature gradient of the refractive indices at room temperature. A bandgap tuning sensitivity of is achieved at room temperature. The insertion loss is estimated to be less than and caused mainly by coupling loss between the index-guided mode and the bandgap-guided mode.
© 2006 Optical Society of America
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