HIGH-EFFICIENCY ARRAYED-WAVEGUIDE GRATING ROUTER BY WAVEFRONT FORMATION
Interface loss, diffraction loss, and physical sizes of arrayed-waveguide AWG devices 10, such as AWG routers, are reduced via use of an array 12 of asymmetric waveguide couplers 20 that is inserted between arrayed waveguides 13. The asymmetric waveguide couplers 20 operate to couple leaked optical...
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Main Authors | , |
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Format | Patent |
Language | English French |
Published |
28.11.2002
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Edition | 7 |
Subjects | |
Online Access | Get full text |
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Summary: | Interface loss, diffraction loss, and physical sizes of arrayed-waveguide AWG devices 10, such as AWG routers, are reduced via use of an array 12 of asymmetric waveguide couplers 20 that is inserted between arrayed waveguides 13. The asymmetric waveguide couplers 20 operate to couple leaked optical power back to the arrayed waveguides 13. A lenslet matrix may also be used to pre-channel portions of an optical wavefront. The lenslet matrix includes lenslet columns that are aligned with gaps between the arrayed waveguides 13, such that the portions of the optical wavefront are directed towards the arrayed waveguides 13 rather than towards the gaps 14.
Interface loss, diffraction loss, and physical sizes of arrayed-waveguide (AWG) devices, such as AWG routers, are reduced via use of an array of asymmetric waveguide couplers that is inserted between arrayed waveguides. The asymmetric waveguide couplers operate to couple leaked optical power back to the arrayed waveguides. A lenslet matrix may also be used to pre-channel portions of an optical wavefront. The lenslet matrix includes lenslet columns that are aligned with gaps between the arrayed waveguides, such that the portions of the optical wavefront are directed towards the arrayed waveguides rather than towards the gaps.
Selon l'invention, la perte d'interface, la perte de diffraction, et les dimensions physiques de dispositifs de réseaux sélectifs planaires (AWG), tels que des routeurs AWG, sont réduites par utilisation d'un réseau de coupleurs de guide d'ondes asymétriques qui est inséré entre des réseaux sélectifs planaires. Les coupleurs de guide d'ondes asymétriques couplent à nouveau la puissance optique de fuite aux réseaux sélectifs planaires. Une matrice à microlentilles peut également être utilisée pour canaliser au préalable des parties d'un front d'onde optique. La matrice à microlentilles comprend des colonnes de microlentilles qui sont alignées avec des écartements situés entre les réseaux sélectifs planaires, de telle sorte que les parties du front d'onde optique sont dirigées vers les réseaux sélectifs planaires plutôt que vers les écartements. |
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Bibliography: | Application Number: WO2002US14875 |