Optical Fiber Sensors
Optica, Optics Letters, 3(32), p. 214
DOI: 10.1364/ol.32.000214
We present what is to our knowledge the first demonstration of a tunable fiber Bragg grating device in polymer optical fiber that utilizes a thin-film resistive heater deposited on the surface of the fiber. The polymer fiber was coated via photochemical deposition of a Pd/Cu metallic layer with a procedure induced by vacuum–ultraviolet radiation at room temperature. The resulting device, when wavelength tuned via joule heating, underwent a wavelength shift of 2 nm for a moderate input power of 160 mW , a wavelength to input power coefficient of −13.4 pm/mW , and a time constant of 1.7 s−1