A novel configuration of a wavelength multiplexed hydrogen sensor based on a palladium-coated tapered fibre and a fibre Bragg grating is presented. This scheme allows cascading several sensors along a single fibre, which increases the capability of implementing multipoint sensor networks for volumetric detection. Moreover, in this configuration the light interacts twice with the palladium layer, thus enhancing the sensitivity of the sensor.
Zalvidea, D. Díez Cremades, Antonio Cruz Muñoz, José Luis Andrés, Miguel V. 2004 Wavelength multiplexed hydrogen sensor based on palladium-coated fibre-taper and Bragg grating Electronics Letters 40 5 301 302
