Tunable optical dispersion-slope compensation based on a nonlinearly-chirped bragg grating
First Claim
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1. A system, comprising:
- a fiber grating formed in a fiber and configured to have a spatial grating pattern that changes nonlinearly along said fiber to exhibit up to at least a third-order nonlinear dispersion effect so as to produce a tunable dispersion slope; and
a grating control unit coupled to said fiber grating and operable to adjust a grating parameter of said fiber grating to tune both dispersion and dispersion slope produced by said fiber grating.
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Abstract
Techniques for using a nonlinearly-chirped fiber Bragg grating to produce tunable dispersion-slope compensation.
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Citations
14 Claims
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1. A system, comprising:
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a fiber grating formed in a fiber and configured to have a spatial grating pattern that changes nonlinearly along said fiber to exhibit up to at least a third-order nonlinear dispersion effect so as to produce a tunable dispersion slope; and
a grating control unit coupled to said fiber grating and operable to adjust a grating parameter of said fiber grating to tune both dispersion and dispersion slope produced by said fiber grating. - View Dependent Claims (2, 3, 4, 5)
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6. A system, comprising:
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a fiber having a receiving end to a plurality of wavelength-division multiplexed (WDM) optical channels with a constant channel spacing in wavelength;
a fiber grating formed in said fiber and configured to have a spatial grating pattern that changes nonlinearly along said fiber to exhibit up to at least a third-order nonlinear dispersion effect and a spatial sampling pattern that overlaps with and modulates said spatial grating pattern to produce a plurality of Bragg reflection bands centered at different band center wavelengths that are spaced differently from said constant channel spacing, said fiber grating operable to produce a dispersion slope in each Bragg reflection band that is adjustable when a grating parameter is changed; and
a grating control unit coupled to said fiber grating and operable to adjust said grating parameter of said fiber grating to tune both dispersion and said dispersion slope produced by said fiber grating. - View Dependent Claims (7, 8, 9, 10)
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11. A method, comprising:
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providing a fiber grating formed in a fiber and configured to have a spatial grating pattern that changes nonlinearly along said fiber to exhibit up to at least a third-order nonlinear dispersion effect and a spatial sampling pattern that overlaps with and modulates said spatial grating pattern to produce a plurality of Bragg reflection bands centered at different band center wavelengths, said fiber grating operable to produce a dispersion slope in each Bragg reflection band that is adjustable when a grating parameter is changed;
directing multiple optical channels into said fiber grating where channel wavelengths of different optical channels are respectively in different Bragg reflection bands and are respectively positioned differently with respect to respective band center wavelengths;
adjusting a grating parameter of said fiber grating to change dispersion slopes differently at respective different channel wavelengths to negate different dispersions and different dispersion slopes with respect wavelength in different channels. - View Dependent Claims (12, 13, 14)
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Specification