期刊
OPTICS EXPRESS
卷 22, 期 5, 页码 5277-5282出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.22.005277
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资金
- Natural Science and Engineering Research Council of Canada
- Canada Foundation for Innovation
- Canada Research Chairs program
- National Natural Science Foundation of China [51374188]
- Zhejiang Provincial Natural Science Foundation for Distinguished Young Scientists [LR13E040001]
The scatterings of TE- and TM-polarized evanescent wave on the surface of a tilted fiber Bragg grating (TFBG) with a 50 nm thick gold coating were investigated experimentally by observing radiation patterns from discontinuities in the coating. The scattering intensity for TM-polarized light is larger than for TE light when the evanescent wave propagates from the coating towards the discontinuity. The opposite occurs for light propagating from an uncoated section towards the coating edge. However in the latter case the scattering is much weaker. These results confirm that cladding modes with TE and TM polarization can be excited selectively with a TFBG, and that they scatter light differentially at discontinuities. These results are used to propose a simple polarimeter design based on total scattered light intensity monitoring. (C) 2014 Optical Society of America
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