Chromatic dispersion compensation in waveguide arrays
AssigneeJDS Uniphase Corporation
InventorsBarthelemy Fondeur, Anca Sala
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Abstract
A flat-top arrayed waveguide grating with a Hyper-Gaussian distribution function and a modified sinc design exhibits a very low chromatic dispersion, low loss and requires a relatively small number of waveguides. Controlled loss is introduced into certain waveguides of the array by creating gaps (unguided regions) between the waveguides to produce a desired predetermined amplitude distribution. The gaps are preferably arranged in the middle of the array.
Claims6
A waveguide grating router comprising
- a first optical coupling device having at least one input port and P output ports, a second optical coupling device having at least P input ports and at least one output port;
- and P optical paths coupling the output ports of the first coupling device to the input ports of the second coupling device, wherein at least some of the optical paths have gaps formed by unguided free-distribution regions disposed between the coupling devices to produce predetermined optical energy losses in selected optical paths and consequently a predetermined amplitude distribution profile through the optical paths, the profile selected to result in a relatively flat chromatic dispersion passband profile of the router.
An optical interleaver comprising a waveguide grating router comprising a first optical coupling device having at least one input port and P output ports, a second optical coupling device having at least P input ports and at least one output port;
- and P optical paths coupling the output ports of the first coupling device to the input ports of the second coupling device, wherein at least some of the optical paths have gaps formed by unguided free-distribution regions disposed between the coupling devices to produce predetermined optical energy losses in selected optical paths and consequently a predetermined amplitude distribution profile through the optical paths, the profile selected to result in a relatively flat chromatic dispersion passband profile of the router, wherein free spectral range (FSR) of the router is a multiple of channel spacing input to the router.
Dependencies are inferred from the claim text.