MICROFIBER DEVICE WITH ENCLOSED INNER CAVITY
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United States of America Patent
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Issued Date -
Dec 11, 2014
app pub date -
Jun 7, 2013
filing date -
Jun 7, 2013
priority date (Note) -
Abandoned
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Abstract
Photonic devices that include in-line optical microfibers for different uses such as sensing are described. At least one enclosed cavity is positioned within the optical microfiber. One or more enclosed cavities are positioned along or adjacent to a central axis of the microfiber. Light travelling within the microfiber passes through both the enclosed cavity and a remaining portion of the microfiber not occupied by the enclosed cavity. For interferometer applications, recombination of the light propagating through the microfiber and cavity has a light intensity correlated to an external physical property to be measured such as temperature and refractive index as well as strain and bending experienced by the fiber. Plural cavities can be constructed sequentially. Further, whispering gallery mode (WGM) resonator properties of the enclosed cavity can be used to measure external properties. A method for fabricating the optical microfiber devices by micromachining is also described.
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