We present a novel class of highly sensitive sensors based on long-period fiber gratings that can be implemented with simple and inexpensive demodulation schemes. Temperature, strain, and refractive-index resolutions of 0.65 °C, 65.75 µ∊, and 7.69 × 10-5, respectively, are demonstrated for gratings fabricated in standard telecommunication fibers.
© 1996 Optical Society of America
Vikram Bhatia and Ashish M. Vengsarkar, "Optical fiber long-period grating sensors," Opt. Lett. 21, 692-694 (1996)