Mutual wavelength locking in WDM-PONs
First Claim
1. An apparatus, comprising:
- a first transceiver to transmit a first set of optical signals in a first direction along a first wavelength channel; and
a second transceiver coupled to the first transceiver to transmit a second set of optical signals along the first wavelength channel in a second direction, wherein the first transceiver is wavelength locked using the second transceiver and the second transceiver is wavelength locked using the first transceiver.
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Accused Products
Abstract
Methods and apparatuses to provide wavelength locked WDM Passive Optical Networks (“PONs”) are described. A first transceiver transmits a set of optical signals in a first direction along a wavelength channel. A second transceiver transmits another set of optical signals along the same wavelength channel in another direction. The wavelength of the first transceiver is locked using an optical power of the optical signals of the second transceiver. The wavelength of the second transceiver is locked using the optical power of the optical signals of the first transceiver. A WDM MUX/De-MUX is coupled between the first transceiver and the second transceiver. An in-line gain element can be coupled to the WDM MUX/De-MUX to amplify the optical signals. The first transceiver and the second transceiver operate in a saturated gain condition.
145 Citations
37 Claims
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1. An apparatus, comprising:
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a first transceiver to transmit a first set of optical signals in a first direction along a first wavelength channel; and a second transceiver coupled to the first transceiver to transmit a second set of optical signals along the first wavelength channel in a second direction, wherein the first transceiver is wavelength locked using the second transceiver and the second transceiver is wavelength locked using the first transceiver. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A system, comprising:
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a first wavelength division multiplexing multiplexer/de-multiplexer (“
WDM MUX/De-MUX”
) having a first wavelength channel;a first transceiver to send a first set of optical signals in a first direction along the first wavelength channel; a gain element coupled to the WDM MUX/De-MUX; and a second transceiver coupled to the gain element to send a second set of optical signals in a second direction along the first wavelength channel. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A method, comprising:
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transmitting a first set of optical signals along a first wavelength channel in a first direction from a first transceiver; transmitting a second set of optical signals along the first wavelength channel in a second direction from a second transceiver; locking a first wavelength of the first transceiver using the second set of the optical signals; and locking a second wavelength of the second transceiver using the first set of the optical signals. - View Dependent Claims (26, 27, 28, 29, 30, 31)
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32. An apparatus, comprising:
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means for transmitting a first set of optical signals along a first wavelength channel in a first direction from a first transceiver; means for transmitting a second set of optical signals along the first wavelength channel in a second direction from a second transceiver; means for locking a first wavelength of the first transceiver using the second set of the optical signals; and means for locking a second wavelength of the second transceiver using the first set of the optical signals. - View Dependent Claims (33, 34, 35, 36, 37)
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Specification