TH11325A - Fiber optic telecommunication lines with independent operating channels. - Google Patents

Abstract

This invention refers to a fiber optic transmission line consisting of devices or processes (9, 10) for the transmission and devices or processes (9, 10) for the separation of optical operational signals into and out of the fiber optic line (3). Such devices or processes consist of a receiver and/or transmitter (10) for optical operational signals, which is suitable for receiving the signal from the fiber optic line (3) and/or transmitting the operational signal to the communication line in the form of an optical signal with a wavelength that is significantly different from the wavelength of the telecommunication signal. Each set of (10) is associated with a corresponding optical coupling (9) inserted along the fiber optic line (3), which is suitable for coupling within the fiber and/or for separating the optical operational signal from the communication line.

Claims (9)

1. A fiber optic transmission line, at least consisting of one telecommunication transmitting station (1) and one telecommunication receiving station (4) and at least one optical amplifier (6, 8), is characterized by having devices (9, 10) for injection and devices (9, 10) for separating optical service signals from the optical fiber (3) of the line, herein such devices consist of at least one optical service signal transmitting and/or receiving unit (10), which is suitable for receiving from the optical line and/or transmitting the same service signal, which is generated by a communication or control signal supplied or electrically brought from the unit itself, in the form of an optical signal with a wavelength different from the wavelength of the telecommunication signal, herein such unit (10) together with a corresponding optical connector (9) is inserted along the line, which is suitable for connecting within the optical fiber (3) of the line and/or for separating. The optical service signal is expelled from it, by optical amplifiers (6, 8), or by individual optical amplifiers that are combined with at least one device (9, 10) to perform the injection or separation of the optical service signal. 2. The fiber optic transmission line under claim 1, is characterized by optical amplifiers (6, 8) or individual optical amplifiers combined with devices (9, 10) to perform injection and with devices (9, 10) to perform optical service signal separation, suitable for switching the service signal by itself along the path which is adjacent to amplifier (8). 3. The fiber optic transmission line under Claim 1 is characterized by the service signal wavelength being equal to, or differing only slightly from, the wavelength corresponding to the minimum value of the fiber optic attenuation curve. 4. The fiber optic transmission lines under claim 1 are characterized by the wavelengths of telecommunication signals being in the range of 1500 to 1600 nanometers and service signals being in the range of 1200 to 1400 nanometers, with service signals being transmitted at a rate lower than 300 kilobits per second. 5. The optical fiber transmission line under claim 1, which is characterized by the optical connector (9) being made up by a dichroic fiber connector. 6. The fiber optic transmission line under claim 2 is characterized by optical amplifiers (6, 8) of the material or other amplifiers being made up of a fluorescently doped section of the fiber (12) and by a device (14) to inject into the fiber (12) fluorescent drive energy, which has a wavelength different from the telecommunication wavelength, generated by the driven laser (13) associated with at least one amplifier to provide a receiving unit (10) and a transmitting unit (10) of optical service signals and corresponding optical connectors (9) inserted along the fiber (3) at the source and destination of the optical amplifiers (8), respectively, in the direction in which the service signal is transmitted. 7. The fiber optic transmission line under claim 6 shall be characterized by the receiving and transmitting units (10) being electrically connected, by the electrical insertion of electronic amplification devices (11), such units being suited to receive the optical service signal from the line (3), to convert it into an electrical signal, to amplify it electrically and to receive the electrically amplified signal in sequence, to convert it into an optical signal at the service wavelength and to transmit it over the line. 8. The fiber optic transmission line under claim number 6 is characterized by the receiving and transmitting unit (10) of the service signal, which consists of devices for controlling and commanding one or more laser-driven amplifiers (13), which are driven by the service signal. 9. The fiber optic transmission line under claim 6 is characterized by a device (15) to inject fluorescent drive energy into the active fiber portion of at least one optical amplifier and at least one optical connector of the service signal which the amplifier itself has made available by one optical connector of three wavelengths (15) (Clause 9, 3 pages, 5 figures).