OPTICAL COMMUNICATIONS IN RECIPROCAL NETWORKS BASED ON WAVELENGTH SWITCHING
First Claim
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1. A system for optical communications, comprising:
- a first optical communication module to output a first optical signal;
an optical link optically coupled to the first optical communication module to receive and transmit the first optical signal; and
a second optical communication module optically coupled to the fiber to reflect the first optical signal, without changing an optical wavelength of the reflected light, back into the link towards the first optical communication module as a second optical signal to be received by the first optical communication module,wherein the first optical communication module controls a wavelength of the first optical signal to change over time into, at a minimum, a first optical wavelength during a first duration of transmission of the first optical signal and a second, different optical wavelength during a second subsequent duration of the transmission of the first optical signal so that light being received in the second optical signal at the first optical communication module is at the first optical wavelength while light in the first optical signal being output by the first optical communication module is at the second optical wavelength.
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Abstract
Techniques, apparatus and systems to provide packet transmission in reciprocal transmission architecture networks for optical communications.
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Citations
18 Claims
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1. A system for optical communications, comprising:
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a first optical communication module to output a first optical signal; an optical link optically coupled to the first optical communication module to receive and transmit the first optical signal; and a second optical communication module optically coupled to the fiber to reflect the first optical signal, without changing an optical wavelength of the reflected light, back into the link towards the first optical communication module as a second optical signal to be received by the first optical communication module, wherein the first optical communication module controls a wavelength of the first optical signal to change over time into, at a minimum, a first optical wavelength during a first duration of transmission of the first optical signal and a second, different optical wavelength during a second subsequent duration of the transmission of the first optical signal so that light being received in the second optical signal at the first optical communication module is at the first optical wavelength while light in the first optical signal being output by the first optical communication module is at the second optical wavelength. - View Dependent Claims (2, 3, 4, 5)
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6. A system for transmitting a plurality of carrier signal packets from station A to station B and back to station A, the system comprising:
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an optical transmission line between station A and station B; a transceiver coupled at station A, wherein the transceiver comprises; a transmitter configured to emit the plurality of carrier signal packets for transmission to station B, wherein the plurality of carrier signal packets is emitted at a plurality of different wavelengths based on an emission schedule; a receiver configured to receive the plurality of carrier signal packets upon return to station A after reflection at station B, wherein the receiver can reject a Rayleigh backscattering noise at an emission wavelength; a control unit configured to switch the emission wavelength upon receipt of a carrier signal packet at the emission wavelength; and a reflector coupled at station B to direct the plurality of carrier signal packets back into the optical transmission line for return to station A. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14)
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15. A method for transmitting a plurality of carrier signal packets from station A to station B and back to station A, the method comprising:
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providing an optical transmission line between station A and station B; integrating a transmitter coupled at station A capable of emitting a plurality of carrier signal packets at a plurality of different wavelengths; integrating a receiver coupled at station A capable of selectively detecting the plurality of wavelengths emitted by the transmitter; and sequentially emitting the plurality of carrier signal packets at the plurality of different wavelengths according to an emission schedule such that a wavelength emitted by the transmitter is different from a wavelength of carrier signal packet detected by the receiver. - View Dependent Claims (16, 17, 18)
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Specification