Wavelength Tunable Distributed Vibration Sensing is a fiber optic sensing technique that detects vibrations along the length of an optical fiber by tuning the wavelength of the probing light. Changes in the backscattered optical signal reveal the location and intensity of vibrations at different points along the fiber. This approach enables distributed monitoring of large structures or infrastructure using a single sensing fiber.
We demonstrate a wavelength tunable Distributed-Vibration-Sensing over PON scheme using low-cost ITLA and Enhanced-Scattering-Fibers. Vibrations at frequency grids of 193.40THz and194.60THz in a PON with 1×16 splitter and 21 km feeder-fiber were successfully detected.
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