G - Physics
02
B
G02B 5/20 (2006.01) G02B 6/12 (2006.01) G02B 6/14 (2006.01) G02B 6/34 (2006.01) H01S 3/067 (2006.01) H01S 5/14 (2006.01) H04J 14/02 (2006.01) G02B 6/28 (2006.01) H01S 3/083 (2006.01)
Patent
CA 2176027
An optical filter comprises a multi-mode waveguide (W2) and a single-mode waveguide (W1, W3) coupled in series, the interference of different modes at the multiple-mode/single-mode, interface being effective to filter an optical signal propagating through the waveguides to provide a desired wavelength response characteristic. The offset between the waveguides may be varied to control the filter characteristic. The filter may be formed in the cavity of a laser to produce an output having a comb-filter characteristic. It may be used as channel selector in WDM systems.
Ce filtre optique comprend un guide d'onde multimode multiple (W2) ainsi qu'un guide d'onde monomode (W1, W3) couplés en série, l'interaction des différents modes à l'interface multimode/monomode filtrant de manière efficace un signal optique qui se propage à travers les guides d'onde afin de donner une caractéristique de réponse désirée. On peut faire varier le décalage entre les guides d'onde afin de commander la caractéristique du filtre. On peut former ce filtre dans la cavité d'un laser afin de produire un signal de sortie doté d'une caractéristique de filtre en peigne.
Finlayson Neil
Poustie Alistair James
Gowling Lafleur Henderson Llp
Ipg Photonics Corporation
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