Patent ID: 6111675
Filing Date: 2000-08-29
Classification: G08C,H04B,H04J

Abstract:
An optical fiber communication system for the bi-directional transmission of communication and telemetry service signals, comprising:a first multiplexing device, wherein said first multiplexing device sends optical communication signals of a first wavelength and receives optical communication signals of a second wavelength, sends optical telemetry service signals of a third wavelength, and receives optical telemetry service signals of a fourth wavelength;a second multiplexing device, wherein said second multiplexing device receives the optical communication signals of the first wavelength, sends the optical communication signals of the second wavelength, receives the optical telemetry service signals of the third wavelength, and sends the optical telemetry service signals of the fourth wavelength;an optical fiber optically coupled to said first multiplexing device and to said second multiplexing device for carrying the optical telemetry service signals at the third and fourth wavelengths;optical amplification means for bi-directional amplification of optical signals carried by said optical fiber, wherein said optical amplification means is optically coupled to said optical fiber between said first multiplexing device and said second multiplexing device; anda third and fourth multiplexing device, each optically coupled to said optical fiber and said amplification means, for sending and receiving optical signals from said first and second multiplexing devices, respectively.