H - Electricity – 04 – B
Patent
H - Electricity
04
B
H04B 10/12 (2006.01) G02B 5/20 (2006.01) G02B 6/14 (2006.01) G02B 6/34 (2006.01)
Patent
CA 2198768
The invention provides an optic filter formed by the inscription of at least one wide-spaced Bragg lattice (2) in an optic fiber. The filter is characterized by the fact that the optic fibre is tapered to define two essentially adiabatic transition zones (Z1, Z3) delimiting an intermediate zone (Z2), the wide-spaced Bragg grating (2) being entered in the intermediate zone (Z2) to produce a codirectonal coupling between core and cladding modes (LP01m LP02) at a wave length that is a function of the lattice spacing (2).
L'invention fournit un filtre optique formé par inscription d'au moins un réseau de Bragg à pas long (2) dans une fibre optique. Le filtre est caractérisé en ce que la fibre optique est effilée pour définir deux zones de transition (Z1, Z3) sensiblement adiabatiques délimitant une zone intermédiaire (Z2), le réseau de Bragg à pas long (2) étant inscrit dans la zone intermédiaire (Z2) pour produire un couplage codirectionnel entre modes de coeur et de gaine (LP01, LP02) à une longueur d'onde qui est fonction du pas du réseau (2).
Bakhti Fatima
Gonthier Francois
Riant Isabelle
Sansonetti Pierre
Alcatel
Alcatel Alsthom Compagnie Generale D'electricite
Robic
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