Optical communication system

Optical: systems and elements – Deflection using a moving element – Using a periodically moving element

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359160, 359176, 359341, H04B 1002

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active

057935122

ABSTRACT:
An optical communication system in which the degradation of the signal-to-noise-ratio during transmission is alleviated. An optical signal from an optical transmitter is propagated over a transmission line comprising optical fibers and optical amplifiers, and received by an optical receiver. The signal-to-noise ratio is improved by inserting an injection-locked laser device at a specified point on the optical transmission line, improving the transmission characteristics of the optical communication system.

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Ryu, Shiro, et al., "Long-Haul Coherent Optical Fiber Communication Systems Using Optical Amplifiers," Journal of Lightwave Technology, vol. 9, No. 2, Feb. 1991, pp. 251-260.
Chraplyvy, Andrew R., "Limitations on Lightwave Communications Imposed by Optical-Fiber Nonlinearities," Journal of Lightwave Technology, vol. 8, No. 10, Oct. 1990, pp. 1548-1557.
Ryu, Shiro, "Signal Linewidth Broadening due to Nonlinear Kerr Effect in Long-Haul Coherent Systems using Cascaded Optical Amplifiers," Journal of Lightwave Technology, vol. 10, No. 10, Oct. 1992, pp. 1450-1457.
Kobayashi, S. and Kimura, T., "Injection Locking in AlGaAs Semiconductor Laser," IEEE Journal of Quantum Electronics, vol. QE-17, No. 5, May 1981, pp. 681-689.

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