Optical transmission system for super long distant transmission and dispersion balanced processing method
A technology of transmission distance and processing method, which is applied in the field of optical communication, can solve the problems of bulky equipment, increase system cost, occupy space, etc., and achieve the effect of small structure composition, easy realization, and clear structure
Inactive Publication Date: 2005-12-07
HUAWEI TECH CO LTD
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However, this dispersion equalization scheme mainly has the following disadvantages: First, considering that the distance of the current high-speed ultra-long-distance optical transmission system is generally within 3000km, due to the large insertion loss of MUX and DE-MUX, both in front and behind Erbium-doped fiber amplifier (EDFA) must be used to amplify the optical power, which increases the cost of the system, and due to the inherent nonlinear noise of EDFA, the signal-to-noise ratio of the optical signal decreases, reducing the maximum distance of ultra-long transmission; Different dispersion compensation for each wavelength requires a lot of dispersion compensation modules, and there are many types of modules, not only the cost is high, but also the inventory is large; finally, due to the large number of dispersion compensation modules in the entire dispersion equalization solution, the entire equipment The volume is huge, that is, it takes up the space of the bureau, which increases the difficulty of maintenance
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[0024] like figure 1As shown, the optical transmission system with ultra-long transmission distance described in the present invention includes an optical signal transmitting end, a transmission line, and an optical signal receiving end, and is characterized in that the optical signal transmitting end or the receiving end or the transmission line or a combination thereof At least one wavelength division multiplexer that can couple and multiplex the optical signals of each group of wavelength bands together, and the output end of at least one wavelength division multiplexer is provided with a dispersion processing unit or an insertion loss unit or a dispersion processing unit and an insertion loss A combination of processing units, wherein the dispersion processing unit or the insertion loss processing unit or the combination of the dispersion processing unit and the insertion loss processing unit processes the optical signals of each group of bands into different optical signal...
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A super long distance optical transmission system and the balanced processing method for its chromatic dispersion wherein the system comprises an optical signal transmitting end, transmission line and optical signal receiving end, characterized by that, a chromatic dispersion processing unit or insertion damage processing unit or their combination is arranged at the optical signal transmitting end or receiving end, or in the transmission line, or on the optical signal of at least one wave range group of their combination for proceeding chromatic dispersion compensation or insertion damage processing to each group of wave ranges of the transmitting terminal. The invention realizes the small volume of the system architecture and low cost.
Description
technical field [0001] The invention relates to the technical field of optical communication, in particular to an optical transmission system with an ultra-long transmission distance and a dispersion equalization processing method thereof. Background technique [0002] In high-speed, ultra-long-distance optical transmission systems, dispersion can be solved by dispersion compensation technology; but because the current dispersion compensation technology cannot compensate the wavelengths of the entire band at the same time, for high-speed ultra-long-distance optical transmission systems, It is necessary to use dispersion equalization technology. At present, the research and development of high-speed ultra-long-distance optical transmission system has just begun, and the dispersion equalization technology is not very mature. The dispersion equalization method usually used now is to use a demultiplexer (DE-MUX) in the middle of the line to separate all wavelengths. , and then ...
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IPC IPC(8): H04B10/2513
Inventor 柳贺良钟胜前
Owner HUAWEI TECH CO LTD