23 February 2012 Polymer inverted-rib optical waveguide interferometric sensor for optoacoustic imaging
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An Interferometric Polymer Optical Waveguide Sensor (IPOWS) for optoacoustic signal detection has been fabricated by UV-imprinting method. The sensor has been characterized in sensitivity, dynamic range and frequency bandwidth. The noise equivalent pressure (NEP) of the sensor is around 100 Pa for a bandwidth range of 20 MHz. We have compared experimentally the performance of the IPOWS with a piezoelectric ultra wideband sensor and other optical fiber sensors based on single-mode silica and polymer optical fibers. All sensors are designed for the detection of optoacoustic wave sources with a frequency bandwidth that exceed 10MHz.
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Daniel Gallego, Meng Wang, Jussi Hiltunen, Risto Myllylä, Horacio Lamela, "Polymer inverted-rib optical waveguide interferometric sensor for optoacoustic imaging", Proc. SPIE 8223, Photons Plus Ultrasound: Imaging and Sensing 2012, 822343 (23 February 2012); doi: 10.1117/12.910826; https://doi.org/10.1117/12.910826

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