Optical signal shaping device for complex spectral shaping applications
First Claim
1. For use with an optical fiber having a core of a first prescribed refractive index n1 and a cladding of a second prescribed refractive index n2 and configured to transmit an optical signal therethrough, an optical signal shaping device, comprising:
- a long period grating of predetermined length formed within said optical fiber, said long period grating having a nonuniform refractive index profile extending over at least a portion of said predetermined length and configured to alter said optical signal to produce an asymmetrical optical signal, wherein at least a portion of said optical signal is diverted to said core or said cladding.
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Accused Products
Abstract
The present invention provides an optical signal shaping device, such as a long period grating, for use with an optical fiber having a core of a first prescribed refractive index n1 and a cladding of a second prescribed refractive index n2 and configured to transmit an optical signal therethrough. The optical signal shaping device comprises a long period grating of predetermined length formed within the optical fiber. The long period grating has a nonuniform refractive index profile extending over at least a portion of the predetermined length and is configured to alter the optical signal to produce an asymmetrical optical signal.
39 Citations
24 Claims
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1. For use with an optical fiber having a core of a first prescribed refractive index n1 and a cladding of a second prescribed refractive index n2 and configured to transmit an optical signal therethrough, an optical signal shaping device, comprising:
a long period grating of predetermined length formed within said optical fiber, said long period grating having a nonuniform refractive index profile extending over at least a portion of said predetermined length and configured to alter said optical signal to produce an asymmetrical optical signal, wherein at least a portion of said optical signal is diverted to said core or said cladding. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for fabricating an optical signal shaping device, comprising the steps of:
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focusing a writing beam on an optical fiber along a predetermined length of a photosensitive portion of said optical fiber; and writing a nonuniform refractive index profile extending over at least a portion of said predetermined length such that said optical signal shaping device is configured to alter an optical signal to produce an asymmetrical optical signal, wherein at least a portion of said optical signal is diverted to said core or said cladding. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. An optical fiber transmission system, comprising:
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an optical fiber having a predetermined length and having a core of a first prescribed refractive index n1 and a cladding of a second prescribed refractive index n2 and configured to transmit an optical signal therethrough; an optical signal shaping device including; a long period grating of predetermined length formed within a portion of said optical fiber, said long period grating having a nonuniform refractive index profile extending over at least a portion of said predetermined length and configured to alter said optical signal to produce an asymmetrical optical signal; and an optical amplifier coupled to said optical fiber, said optical amplifier capable of transmitting an amplified asymmetrical optical signal to said optical fiber, said long period grating configured to divert at least a portion of said amplified asymmetrical optical signal to said cladding. - View Dependent Claims (19, 20, 21, 22, 23, 24)
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Specification