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We prepared and demonstrated a compact, simple-to-fabricate, air microcavity in polydimethylsiloxane (PDMS) placed at the end of a single-mode optical fibre. This microcavity creates a Fabry-Perot interferometer sensor able to measure concentrations of toluene vapour in air. Operation of the sensor is provided by diffusion of the toluene vapour to the PDMS, and the consequent extension of length d...
We present a modification of the interferometric method for the measurement of the refractive index of the optical sample. The spectral low coherence interferometry technique utilizes an almost all-fiber Michelson interferometer with an air-path variable optical delay line. The length of the air-path variable optical delay line can be easily adapted to the various thickness and refractive indexes...
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