| 摘要 |
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. |
