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Water Diffusion Into UV Inscripted Long Period Grating in Microstructured Polymer Fiber

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6 Author(s)
D. Saez-Rodriguez ; Dpto. de Fisica Aplicada y Electromagnetismo, Universidad de Valencia., Burjassot, Spain ; J. L. Cruz ; I. Johnson ; D. J. Webb
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A long period grating was photoinscribed step-by-step in microstructured poly(methyl methacrylate) fiber for the first time using a continuous wave HeCd laser at 325 nm, irradiating the fiber with a power of 1 mW. The grating had a length of 2 cm and a period of 1 mm. A series of cladding mode coupling resonances were observed throughout the spectral region studied of 600 to 1100 nm. The resonance wavelengths were shown to be sensitive to the diffusion of water into the fiber.

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IEEE Sensors Journal  (Volume:10 ,  Issue: 7 )