Enhanced structural sensitivity of hybrid-mode acoustic phonons in axially-varying photonic crystal fiber

Abstract:

We report the observation of anti-crossings between hybrid-mode acoustic phonons in an axially-varying photonic crystal fiber. Our experimental results are analyzed using an electrostriction theory which reveals strong coupling between longitudinal and shear components of elastic wave. These anti-crossings are highly sensitive to the transverse fiber structure and thus could be potentially used for ultra-sensitive sensors and new opto-acoustic devices.

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DOI:

PDF: https://opg.optica.org/directpdfaccess/fafccfb2-d6e8-4b73-aa5fcdccef267a2c_324655/oe-23-18-23329.pdf?da=1&id=324655&seq=0&mobile=no