Optical transmission system having optimized filter wavelength offsets
First Claim
Patent Images
1. An optical transmission system, comprising:
- an optical transmitter including a light generator for generating a transmit signal having a carrier wavelength and an optical transmit filter for filtering said transmit signal at a transmit wavelength offset with respect to said carrier wavelength; and
an optical receiver for receiving said filtered transmit signal through a link, the receiver including an optical receive filter for filtering said received signal at a receive wavelength offset opposite and equal said transmit wavelength offset with respect to said carrier wavelength.
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Abstract
An optical transmission system having optical transmit and receive filters having passbands adjusted or selected for opposite and equal wavelength offsets from the optical wavelength of a carrier or the channel center wavelength.
91 Citations
10 Claims
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1. An optical transmission system, comprising:
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an optical transmitter including a light generator for generating a transmit signal having a carrier wavelength and an optical transmit filter for filtering said transmit signal at a transmit wavelength offset with respect to said carrier wavelength; and
an optical receiver for receiving said filtered transmit signal through a link, the receiver including an optical receive filter for filtering said received signal at a receive wavelength offset opposite and equal said transmit wavelength offset with respect to said carrier wavelength. - View Dependent Claims (2, 3, 4)
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5. An optical transmission system, comprising:
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a filter set having an optical transmit filter and an optical receive filter, wherein a first of the transmit and receive filter has a first wavelength offset with respect to a channel center wavelength defined in a system specification for the system and a second of the transmit and receive filter has a second wavelength offset opposite and equal of said first wavelength offset with respect to said channel center wavelength;
an optical transmitter having said transmit filter for filtering an optical transmit signal; and
an optical receiver for receiving said filtered transmit signal through a link, the receiver including said receive filter for filtering said received signal.
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6. A method in an optical transmission system, comprising:
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generating an optical transmit signal having a carrier wavelength;
filtering said transmit signal at a transmit wavelength offset with respect to said carrier wavelength;
receiving said filtered transmit signal through a link; and
filtering said received signal at a receive wavelength offset with respect to said carrier wavelength opposite and equal said transmit wavelength offset. - View Dependent Claims (7, 8, 9)
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10. A method in an optical transmission system, comprising:
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selecting an optical transmit filter and an optical receive filter as a filter set, wherein a first of the transmit and receive filter has a first wavelength offset with respect to a channel center wavelength defined in a system specification for the system and a second of the transmit and receive filter has a second wavelength offset opposite and equal of said first wavelength offset with respect to said channel center wavelength;
filtering a transmit signal with said transmit filter;
receiving said filtered transmit signal through a link; and
filtering said received signal with said receive filter.
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Specification