Abstract
A microfluidic flowmeter is proposed based on graphene integrated “hot-wire” structure. A long-period fiber grating (LPFG) is written in a single mode fiber by CO2 laser to excite the higher-order mode. Graphene is coated around the grating to absorb the higher-order mode and generate the heat. The fiber is sealed into a home-made tube. When the microfluid flows through the graphene, the heat is taken away and the output spectrum of the fiber grating would shift. The flowmeter is promising for the future microfluidic detection.
© 2017 Optical Society of America
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