Schematic diagram of the proposed sensor.
Transmission spectrum of the LPG.
Diagrammatic sketch of the principle of the LPG-based tilt sensor, the left dashed line: the transmission spectrum of LPGsol; the right dashed line: the transmission spectrum of LPGair; solid line : the transmission spectrum of the LPG.
Transmission spectra of the LPG at different tilt angles (from −30° to 30°).
(a) The relationships of the dip wavelength with the tilt angle and (b) the depth and the bandwidth of the LPG's dip with the tilt angle.
The relationship of the dip wavelength and temperature.
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