FIG 1 (IMAGE)

Compuscript Ltd

FIG 1

Caption

Working principle of the strain sensor based on MNF coupler. (a) Schematic diagram of a strain sensor structure. (b), (c) Optical micrographs of an MNF coupler before and after slightly changing of the gap, respectively. The diameter of the MNF is about 900nm, and the bending radius is 50μm. (d) The device response to a metronome at three different volumes. (e) Measurement of the real-time fingertip pulse wave under normal conditions (72 beats per minute) and after exercise (85 beats per minute). The inset shows a photo of the sensor attached to the fingertip to test the pulse of the fingertip, and the scale bar is 1cm.

Credit

OEA

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