High-sensitivity ultrasound interferometric single-mode polymer optical fiber sensors for biomedical applications.
This work describes the results of ultrasonic wideband sensors based on single-mode polymer optical fibers that may be used for biomedical applications. We have compared the ultrasonic sensitivities of two Mach-Zehnder interferometric intrinsic optical fiber sensors. One is based on a single-mode polymethylmethacrylate optical fiber and the second on single-mode silica optical fiber, both operating at 632.8 nm. At a frequency of 1 MHz these sensitivities are 13.1 and 0.85 mrad/kPa, respectively. The ultrasonic phase sensitivity of the polymer optical fiber is more than 12 times larger than that from the fused silica fiber in the 1-5 MHz range.
Gallego
Daniel
D
Optoelectronic and Laser Technology Group (GOTL), Carlos III de Madrid University, 28911 Leganes, Madrid, Spain.
Lamela
Horacio
H
D007368:Interferometry; D008027:Light; D055100:Optical Fibers; D019904:Polymethyl Methacrylate / Q000737:chemistry*; D012542:Scattering, Radiation; D014465:Ultrasonics
D019904:Polymethyl Methacrylate