Title :
Enhanced photosensitivity in tin-codoped germanosilicate optical fibers
Author :
Dong, L. ; Cruz, J.L. ; Reekie, L. ; Xu, M.G. ; Payne, D.N.
Author_Institution :
Optoelectron. Res. Centre, Southampton Univ., UK
Abstract :
Enhanced photosensitivity is found in tin-codoped germanosilicate optical fibers. A photo-induced refractive index change (/spl sim/1.4×10/sup -3/) 3 times larger than that observed in pure germanosilicate fibers has been demonstrated. Unlike the technique of using boron-codoping to enhance the photosensitivity of germanosilicate fibers, tin-doping does not have a significant effect on fiber loss at the important telecommunication window of 1.55 μm. High temperature stability of the gratings in tin-codoped germanosilicate fibers is also much over boron-codoped fibers.
Keywords :
diffraction gratings; germanate glasses; optical fibre communication; optical fibre losses; optical fibres; optical glass; refractive index; stability; tin; 1.55 mum; GeO/sub 2/-SiO/sub 2/:Sn; enhanced photosensitivity; fiber loss; optical fibre gratings; photo-induced refractive index change; telecommunication window; temperature stability; tin-codoped germanosilicate optical fibers; Fiber gratings; Hydrogen; Optical fiber couplers; Optical fiber devices; Optical fiber losses; Optical fiber sensors; Optical fibers; Stability; Temperature; Tin;
Journal_Title :
Photonics Technology Letters, IEEE
