Optical communications systems using raman repeaters and...

Details Optical communications systems using raman repeaters and... Optical communications systems using raman repeaters and...

H - Electricity

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325/1

H04B 10/17 (2006.01) H01S 3/30 (2006.01) H01S 3/094 (2006.01) H01S 5/06 (2006.01) H01S 5/062 (2006.01) H01S 5/50 (2006.01)

Patent

CA 1231138

ABSTRACT OF THE DISCLOSURE An optical fiber communication system for transmitting information-bearing optical signals over an optical fiber transmission line includes a signal genera- tor coupled to the transmission line for introducing information-bearing optical signals thereonto, preferably as wavelength modulated signals, and one or more optical amplifiers for periodically, collectively amplifying the transmitted signals to overcome the effects of attenua- tion. Wavelength modulation is achieved by altering the resonant characteristics of an optical resonator, opti- cally coupled to a gain medium so as to provide an output that varies between a first and second wavelength. The optical amplification is achieved by injecting, prefer- ably via lateral optical fiber couplings, pumping beams into the optical fiber so as to effect an increase in the amplitude of the information-bearing signals by stimu- lated Raman scattering.

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