A photonic wall pressure sensor for fluid mechanics applications
Abstract
In this paper, we demonstrate a micro-optical wall pressure sensor concept based on the optical modes of dielectric resonators. The sensing element is a spherical micro-resonator with a diameter of a few hundred micrometers. A latex membrane that is flush mounted on the wall transmits the normal pressure to the sensing element. Changes in the wall pressure perturb the sphere's morphology, leading to a shift in the optical modes. The wall pressure is measured by monitoring the shifts in the optical modes. Prototype sensors with polydimethylsiloxane micro-spheres are tested in a steady two-dimensional channel flow and in a plane wave acoustic tube. Results indicate sensor resolutions of ∼20 mPa and bandwidth of up to 2 kHz.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Oct 01, 2012
- Source ID
- 10.1063/1.4757569
Entities
People
- M. Manzo
- M. V. Otugen
- T. Ioppolo
- U. K. Ayaz
- V. Lapenna
Organizations
- Air Force Office of Scientific Research
- National Science Foundation
- Southern Methodist University