Journal
OPTICS EXPRESS
Volume 17, Issue 6, Pages 4533-4539Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.17.004533
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Funding
- Research Grants Council of the Hong Kong Special Administrative Region, China [CityU 111907]
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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
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