Photosensitivity in optical fibers

Photoinduced Bragg grating in an optical fiber was made by Hill years ago, it wasn´t until relatively recently that the field received intensive research interest. In 1989 Meltz et al. reported the formation of a grating using a holographic side-writing technique and the realization that this technique could be used to write well controlled structures into the fiber resulted in a resurgence of interest in the photosensitivity of optical fibers.