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US 7,072,546 B2Granted
Compensation for chromatic dispersion
AssigneeIntel Corporation
InventorsDmitri E. Nikonov, Thomas G. Willis, Anders Grunnet-Jepsen, Atul A. Tambe
Life of this patent
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Abstract
A plurality of channels of a wavelength division multiplexing system may be subjected to dispersion compensation in a fashion which enables tuning of the compensation for each individual wavelength channel. Moreover, the tuning may be done in a space-efficient fashion. The chirped Bragg gratings may be formed, for example, on a planar light circuit. Each grating may be heated to controllably adjust its dispersion compensation, in one embodiment of the present invention.
Claims18
A method comprising:
- demultiplexing two channels in a multiplexer;
- providing different dispersion compensation to each channel using a heated Bragg grating on each channel and heating said gratings differently to provide different dispersion compensation to each channel;
- and
- reflecting the dispersion compensated signals back through the demultiplexer.
1 more element
An optical device comprising:
- a demultiplexer to demultiplex a multiple channel signal into at least two channels, said demultiplexer being a planar light circuit;
- a planar Bragg grating optically coupled to each of said channels to provide different dispersion compensation to each of said channels;
- a heater to control the average index of refraction of at least one of said Bragg gratings;
- and
- wherein said planar light circuit is an arrayed waveguide which demultiplexes said signal passing in one direction and re-multiplexes signals reflected from said Bragg gratings.
2 more elements
An optical device comprising:
- a demultiplexer to demultiplex a multiple channel signal into at least two channels, said demultiplexer being a planar light circuit;
- a planar Bragg grating optically coupled to each of said channels to provide different dispersion compensation to each of said channels;
- a heater to control the average index of refraction of at least one of said Bragg gratings;
- and
- wherein Bragg gratings are formed in each arm of an interferometer.
2 more elements
Dependencies are inferred from the claim text.