Back to results
US 6,687,054 B2Granted
Apparatus and method for low dispersion in communications
AssigneeCirvine Corporation
InventorBin Zhao
Life of this patent
Estimating the term…
Abstract
A low dispersion comb filter or interleaver assembly has a first interleaver element and a second interleaver element. The first interleaver element is configured so as to provide a dispersion vs. wavelength curve wherein each dispersion value thereof is approximately opposite in value to a dispersion value at the same wavelength for the second interleaver element, so as to mitigate net or total dispersion in the interleaver assembly.
Claims3
A low dispersion interleaver assembly comprising:
- a first interleaver;
- a second interleaver;
- wherein the first interleaver is configured so as to provide a dispersion vs. wavelength curve wherein each dispersion value thereof is approximately opposite in value to a dispersion value at the same wavelength for the second interleaver, so as to mitigate dispersion in the interleaver assembly;
- wherein each interleaver comprises first, second and third birefringent elements;
- wherein angular orientations of the first, second and third birefringent elements of the first interleaver are approximately 45°, approximately −21° and approximately 7°, respectively;
- and
- wherein angular orientations of the first, second and third birefringent elements of the second interleaver are approximately 45°, approximately −69° and approximately 83°, respectively.
4 more elements
A low dispersion interleaver assembly comprising:
- a first interleaver;
- a second interleaver;
- wherein the first interleaver is configured so as to provide a dispersion vs. wavelength curve wherein each dispersion value thereof is approximately opposite in value to a dispersion value at the same wavelength for the second interleaver, so as to mitigate dispersion in the interleaver assembly;
- wherein each interleaver comprises first and second birefringent elements;
- wherein angular orientation of the first, and second birefringent elements of the first interleaver are approximately 45° and approximately −21°, respectively;
- wherein angular orientations of the first, and second birefringent elements of the second interleaver are approximately 135° and approximately 69°, respectively;
- and
- the interleaver assembly further comprising a polarization selection element disposed intermediate the first interleaver and the second interleaver such that separate respective oaths are provided with respective transmission versus wavelength responses which are wavelength shifted with respect to each other.
5 more elements
A low dispersion interleaver assembly comprising:
- a first interleaver;
- a second interleaver;
- wherein the first interleaver is configured so as to provide a dispersion vs. wavelength curve wherein each dispersion value thereof is approximately opposite in value to a dispersion value at the same wavelength for the second interleaver, so as to mitigate dispersion in the interleaver assembly:
- and
- wherein the first interleaver comprises a N GHz interleaver and the second interleaver comprises an N/2 GHz interleaver.
2 more elements
Dependencies are inferred from the claim text.