期刊
OPTICS EXPRESS
卷 24, 期 2, 页码 1206-1213出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.24.001206
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- People Programme (Marie Curie Actions) of the European Union's Seventh Framework Programme under REA grant [608382]
- Innovation Fund Denmark for the project ShapeOCT [4107-00011A]
- Eugen Lommel Stipend
- Danish Council for Independent Research [4184-00359B]
The effect of humidity on annealing of poly (methyl methacrylate) (PMMA) based microstructured polymer optical fiber Bragg gratings (mPOFBGs) and the resulting humidity responsivity are investigated. Typically annealing of PMMA POFs is done in an oven without humidity control around 80 degrees C and therefore at low humidity. We demonstrate that annealing at high humidity and high temperature improves the performances of mPOFBGs in terms of stability and sensitivity to humidity. PMMA POFBGs that are not annealed or annealed at low humidity level will have a low and highly temperature dependent sensitivity and a high hysteresis in the humidity response, in particular when operated at high temperature. PMMA mPOFBGs annealed at high humidity show higher and more linear humidity sensitivity with negligible hysteresis. We also report how annealing at high humidity can blue-shift the FBG wavelength more than 230 nm without loss in the grating strength. (C) 2016 Optical Society of America
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