Morphology dependent polymeric capillary optical resonator hydrostatic pressure sensor.

Area of Science:

• Polymer physics
• Optical sensing technologies
• Mechanical engineering

Background:

• Hydrostatic pressure sensing is crucial for various applications.
• Existing sensors face limitations in sensitivity and size.
• Morphology-dependent resonances offer a potential avenue for novel sensor designs.

Purpose of the Study:

• To present a novel hydrostatic pressure sensor based on morphology-dependent resonances in a polymeric tube.
• To investigate the relationship between geometric and material properties and sensor sensitivity.
• To experimentally validate the sensor's performance.

Main Methods:

• Fabrication of a thin-walled polymeric tube.
• Application of internal hydrostatic pressure to induce mechanical stress.
• Measurement of resonant wavelength shifts using optical techniques.
• Numerical simulations to analyze modal regimes and sensitivity.

Main Results:

• Internal pressurization alters the polymeric tube's dimensions, causing resonant wavelength shifts.
• Numerical simulations revealed two distinct modal regimes of sensitivity.
• A maximum sensitivity of 0.36 ± 0.01 nm/bar was experimentally achieved.
• Optimal sensitivity is dependent on device geometry, material, and mode order.

Conclusions:

• The developed polymeric tube sensor demonstrates high sensitivity to hydrostatic pressure.
• The sensor's performance is tunable through geometric and material design.
• This technology holds promise for advanced pressure monitoring applications.