Title :
Phase-matching of optical fibre photorefractive intermodal couplers in infra-red
Author_Institution :
Dept. de Genie Electr., Laval Univ., Que., Canada
Abstract :
Optical fibre photorefractive intermodal couplers written with visible light can be phase-matched in the infra-red, using the dispersion of the intermodal beat length. Phase matching at 720 nm of an intermodal coupler written at 488 nm is demonstrated. The observation of mode coupling at many closely spaced wavelengths is explained by the nondegeneracy of the higher-order modes.
Keywords :
nonlinear optics; optical couplers; optical fibres; photorefractive effect; refractive index; 488 nm; 720 nm; IR region; infra-red; intermodal beat length dispersion; mode coupling; nonlinear optics higher order modes nondegeneracy; optical fibre photorefractive intermodal couplers; phase matching; refractive index grating;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19891068
