Abstract

We investigate light propagation in randomly spaced fiber gratings in a single-mode fiber and demonstrate the localization effect. Localization of light in random media resembles that of electrons in disordered solids, resulting from a subtle wave-interference formation. We measured the light transmission after each additional grating fabrication and found an exponential decay that follows the localization theory. Important features of the random array are its similarity to ordered gratings in the transmission and its reflection behavior at the long-array regime. Besides the basic interest in localization in one-dimensional systems, random-grating arrays have potential applications, utilizing the possibility of the fabrication of long structures with strong and broadband reflections.

© 2005 Optical Society of America

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