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Free keywords:
POLARIZATION-DEPENDENT LOSS; OPTICAL-FIBERS; BANDGAP FIBERS;
FABRICATION; RESONANCE; SENSORS; WRITTENOptics;
Abstract:
We demonstrate that the efficiency of CO2 laser writing of longperiod fiber gratings in a solid-core photonic crystal fiber (PCF) can be enhanced greatly by applying tension to the fiber during the writing process through the mechanism of frozen-in viscoelasticity. Using this mechanism, we are able to write strong gratings in PCFs with a dosage of CO2 laser radiation low enough not to cause any significant fiber structure deformation. (C) 2009 Optical Society of America
