title: Morphology dependent polymeric capillary optical resonator hydrostatic pressure sensor.
abstract: A hydrostatic pressure sensor based on morphology dependent resonances in a polymeric tube is presented. By internal pressurization, normal tensions will increase the device's size and shrink its wall thickness, inducing a shift in the resonant wavelengths of the resonator. Numerical simulations indicate that there are two modal regimes of sensitivity and a maximum achievable sensitivity, related to the device's geometry, constitutive material and analysed mode order. A sensitivity as high as 0.36 ± 0.01 nm/bar has been experimentally found for a 1.8mm diameter PMMA tube with wall thickness of 80µm.
authors.forename: Marcelo A
authors.initials: MA
authors.lastname: Gouveia
authors.forename: P Duber
authors.initials: PD
authors.lastname: Avila
authors.forename: Thiago H R
authors.initials: TH
authors.lastname: Marques
authors.forename: M Cesar
authors.initials: MC
authors.lastname: Torres
authors.forename: Cristiano M B
authors.initials: CM
authors.lastname: Cordeiro