Permanent grating patterns have been written directly in lead–tin-fluorophosphate glasses by use of UV radiation. The effect of photorefraction is studied in different tin-fluorophosphate compositions. Recorded gratings are found to be volume rather than surface elements. The induced index changes are comparable with those seen in GeO<sub>2</sub>– SiO<sub>2</sub> glasses.
© 1998 Optical Society of America
(060.4370) Fiber optics and optical communications : Nonlinear optics, fibers
(160.2290) Materials : Fiber materials
(160.2900) Materials : Optical storage materials
(230.1150) Optical devices : All-optical devices
Stojan Radic, Rene J. Essiambre, Robert Boyd, Paul A. Tick, and Nicholas Borrelli, "Photorefraction in lead tin-fluorophosphate glasses," Opt. Lett. 23, 1730-1732 (1998)