Title :
Polarization properties of permanent and nonpermanent photorefractive gratings in hi-bi fibers
Author :
Kanellopoulos, S.E. ; Valente, L.C.G. ; Handerek, V.A. ; Rogers, A.J.
Author_Institution :
Dept. of Electron. Eng., King´´s Coll. London, UK
fDate :
4/1/1991 12:00:00 AM
Abstract :
The polarization properties of photorefractive reflecting gratings formed in Ge-doped high-birefringence (hi-bi) fibers by the internal method are presented. The gratings reflect only the polarization eigenmode used in fabrication and a polarization selectivity of 20 dB is demonstrated. It is also shown that there are two different photorefractive effects that can be used to write the gratings: one is permanent when heated to 240 degrees C, while the other is erasable.<>
Keywords :
birefringence; diffraction gratings; fibre optics; light polarisation; light reflection; photorefractive effect; 240 degC; Ge-doped fibres; SiO/sub 2/-GeO/sub 2/; erasable; internal method; photorefractive effects; photorefractive gratings; polarization eigenmode; polarization properties; polarization selectivity; reflecting gratings; Fabry-Perot; Fiber gratings; Fiber lasers; Laser modes; Monitoring; Optical fiber polarization; Optical reflection; Photorefractive effect; Thermal stability; Writing;
Journal_Title :
Photonics Technology Letters, IEEE
