G - Physics – 02 – B
Patent
G - Physics
02
B
G02B 6/24 (2006.01) G02B 6/26 (2006.01) G02B 6/28 (2006.01)
Patent
CA 2331981
The Multimode Interference coupler according to the invention has smoothly continuous inwardly tapered sidewalls (301) which define the width of the multimode region (W1) along the propagation axis of the device. The inward taper causes the average width of the device to be reduced in comparison to known couplers having straight sidewalls (202). Further, the invention allows the access waveguides (303, 309) to remain sufficiently spaced, while reducing the overall length of the device, to avoid lithographic gap fill-in and unwanted optical coupling between the access waveguides.
L'invention concerne un coupleur brouilleur multimode comprenant des parois latérales (301) doucement effilées en continu vers l'intérieur, ce qui définit la largeur de la zone multimode (W1) le long de l'axe de propagation du dispositif. L'effilement vers l'intérieur réduit la largeur moyenne du dispositif comparé aux coupleurs connus ayant des parois latérales droites (202). En outre, l'invention permet aux guides d'ondes d'accès (303, 309) de rester suffisamment espacés, tout en réduisant la longueur globale du dispositif afin d'éviter le remplissage de l'intervalle lithographique et le couplage optique indésirable entre les guides d'ondes d'accès.
Levy David S.
Osgood Richard M. Jr.
Scarmozzino Robert
Smart & Biggar
The Trustees Of Columbia University
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