Wavelength multiplexed optical communications system and method

Details Wavelength multiplexed optical communications system and method Wavelength multiplexed optical communications system and method

H - Electricity

04

L

325/1, 363/1.8

H04L 12/42 (2006.01) H04B 10/135 (2006.01) H04J 14/00 (2006.01) H04J 14/06 (2006.01)

Patent

CA 1247703

WAVELENGTH MULTIPLEXED OPTICAL COMMUNICATIONS SYSTEM AND METHOD ABSTRACT OF THE DISCLOSURE An optical fiber communications system includes a closed loop birefringent optical fiber bus for supporting optical energy propagated in a first and a second orthogonal polarization state. An optical energy source introduces a fixed frequency system wide carrier onto the optical fiber bus in a first polarization state for propagation in a first direction. Terminal devices coupled to the optical fiber bus include a bus tap resonator for removing a portion of the system wide carrier light and, in addition to modulating the removed light, effecting a frequency shift to a side frequency and effecting a state shift from the first to the other polarization state, and returning the information bearing optical energy to the optical fiber bus for propagation in a direction opposite to the first direction. A receiving device includes a bus tap resonator for removing a portion of the light from the bus and effecting demodulation to recover the information bearing signal.

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