G - Physics – 02 – F
Patent
G - Physics
02
F
G02F 1/01 (2006.01)
Patent
CA 2368800
By a method for controlling the state of polarisation (SOP) of an optical signal transmitted through an optical waveguide, the waveguide is buried in a planar structure and a plurality of stress-applying films, having variable stress, are placed on the top of the structure. Preferably the stress-applying films comprise materials that have thermal expansion coefficients different from that of the planar structure or comprise materials with piezo-electric properties. In this way it is possible to produce a cascaded series of optical elements with variable linear birefringence in a planar optical waveguide. Moreover according to the invention it is possible, by the method according to the invention, to manufacture optical components having an active polarisation controller.
L'invention concerne un procédé de commande de l'état de polarisation (SOP) d'un signal optique émis à travers un guide d'ondes optique, le procédé consistant à noyer le guide d'ondes dans une structure plane et à placer plusieurs films d'application de tension, à tension variable, au sommet de la structure. De préférence, les films d'application de tension comprennent des matières à coefficient de dilatation thermique différent de celui de la structure plane ou des matières à propriétés piézo-électriques. De cette manière il est possible de produire une série en cascade d'éléments optiques à biréfringence linéaire variable dans un guide d'ondes optique plan. En outre, le procédé selon l'invention permet de produire des éléments optiques comportant une commande de polarisation active.
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
Ignis Technologies As
Ionas A/s
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