Abstract
A high sensitivity strain sensor based on a selective-filling photonic crystal fiebr (SF-PCF) Sagnac interferometer was demonstrated. The SF-PCF was achieved by infiltrating a high index liquid into two symmetrical air holes of the innermost layer. Numetrical results revealed an ultrahigh even theoretically infinite strian sensitivity. A high strain sensitivity with 25 pm/με was experimentally achieved.
© 2017 Optical Society of America
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