CN104363045A - Intelligent wavelength selection optical cross connection system with signal conditioning function - Google Patents
Intelligent wavelength selection optical cross connection system with signal conditioning function Download PDFInfo
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Abstract
The invention relates to an intelligent wavelength selection optical cross connection system with a signal conditioning function. The system comprises a wavelength selection optical cross connection unit formed by a wavelength selection module and an optical cross connection device, a channel monitoring unit and a signal conditioning unit. DWDM signals transmitted from an optical link are input from the input end of a wavelength selection switch, then are output to the optical cross connection device (OXC) through multiple output ports of the wavelength selection switch, crossed by the optical cross connection device (OXC) and outputted to optical splitters through the output ports of the optical cross connection device (OXC). Each optical splitter is connected with the channel monitoring unit and the signal conditioning unit, the channel monitoring unit is used for controlling power values, center wavelengths and signal-to-noise parameters of the input optical signals and transmits the monitored power values, the center wavelengths and the signal-to-noise parameters to the signal conditioning unit, the signal conditioning unit correspondingly manages and controls the input optical signals according to the monitored optical power values and automatically carries out dispersion compensation and power control on the input optical signals. The system improves optical signal transmission performance.
Description
Technical field
The present invention relates to multi-wavelength optical communication field, particularly, relate to a kind of intelligent wavelength selective optical cross system with signal condition function, carrying out channel monitoring and signal condition for exporting light to solution wavelength division multiplexing.
Background technology
Current communication network transmitting terminal, adopts dense wave division multipurpose (DWDM) technology more, and the optical carrier by multiple different wave length is coupled in an optical fiber through wave multiplexer, comes satisfied high speed and wide band communication requirement.Therefore, at receiving terminal, adopt wavelength-selective switches (WSS) involutory ripple signal to carry out demultiplexing.
Along with the increase of current optical fiber telecommunications system transmission rate, transmission range, dispersion, optical power loss physical quantity can increase thereupon, thus cause the transmission performance of system to decline.Dispersion is one of characteristic of Optical Fiber Transmission, and dispersion phenomenon has a strong impact on quality of optical fiber communication.The defect of existing wavelength selection system is: can not overcome optical power loss and chromatic dispersion problem up hill and dale, the intellectuality of optical network system, is the trend of development of optical network, is also the research direction solving optical power loss and chromatic dispersion problem.
Summary of the invention
Object of the present invention is exactly for overcoming the deficiencies in the prior art, for optical power loss and chromatic dispersion problem, provide a kind of design of wavelength-selective switches output signal being carried out to the intelligent wavelength selective optical cross system of channel monitoring and signal condition, system comprises wavelength-selective switches DWDM signal being carried out demultiplexing, light signal is selected flexibly to the light intersection equipment exported, to outputing signal the channel monitoring unit monitored and signal condition unit signal being carried out to power control and dispersion compensation, utilize wavelength-selective switches that DWDM signal is carried out demultiplexing, obtain Single wavelength light signal, as required, single ripple signal exports a direction of other nodes to through light intersection equipment, forms different links.Each output link separates a certain proportion of light signal to channel monitoring unit through optical splitter, and remaining is connected to signal condition unit.Make every effort to make system improve the performance of optical signal transmission, thus solve optical power loss and chromatic dispersion problem.
The present invention is realized by such technical scheme: the intelligent wavelength selective optical cross system with signal condition function, it is characterized in that, system comprises: the wavelength selective optical cross unit, channel monitoring unit and the signal condition unit that are made up of wavelength chooses module (WSS) and light intersection equipment;
The DWDM signal coming from optical link is inputted by wavelength-selective switches (WSS) input, then light intersection equipment (OXC) is exported to from wavelength-selective switches (WSS) multiple output port, intersect through light intersection equipment (OXC), intersect equipment (OXC) output port by light again and export to optical splitter, each optical splitter is connecting channel monitoring unit and signal condition unit respectively;
The light signal that every road output signal that light intersects equipment separates 5% ratio through optical splitter is connected to channel monitoring unit, and all the other light signals of 95% deliver to signal condition unit;
Channel monitoring unit is in order to monitor the performance number of input optical signal, centre wavelength and signal to noise ratio parameter, and the performance number monitored, centre wavelength signal to noise ratio parameter are sent to signal condition unit, signal condition unit to manage accordingly it according to the optical power value of monitoring and controls, and signal condition unit automatically carries out dispersion compensation to it and power controls;
Utilize wavelength-selective switches that DWDM signal is carried out demultiplexing, obtain Single wavelength light signal; As required, single ripple signal exports a direction of other nodes to through light intersection equipment, forms different links; Each output link separates a certain proportion of light signal to channel monitoring unit through optical splitter, and remaining is connected to signal condition unit.
Beneficial effect is:
There is the intelligent wavelength selective optical cross system of signal condition function, comprise wavelength-selective switches DWDM signal being carried out demultiplexing, and light signal is selected flexibly to the light intersection equipment of output, with to outputing signal the channel monitoring unit monitored and signal condition unit signal being carried out to power control and dispersion compensation.This system improves the performance of optical signal transmission.
Accompanying drawing explanation
Fig. 1: the intelligent wavelength selective optical cross system structure chart with signal condition function;
Fig. 2: wavelength selective optical cross unit structure chart;
Fig. 3: signal monitoring cellular construction figure;
Fig. 4: signal condition cellular construction figure.
Embodiment
For a more clear understanding of the present invention, the present invention is described in detail in conjunction with the accompanying drawings and embodiments:
As shown in Figures 1 to 4, for achieving the above object, the present invention includes wavelength selective optical cross unit, channel monitoring unit and signal condition unit three parts that whole system is made up of wavelength chooses module (WSS) and light intersection equipment.Every road of wavelength selective optical cross unit outputs signal the channel monitoring unit that is connected respectively to for monitoring and the signal condition unit for nursing one's health, the light signal that every road output signal separates 5% ratio through optical splitter is connected to channel monitoring unit, all the other light signals of 95% deliver to signal condition unit, Fig. 1 specific as follows
Wavelength selective optical cross unit comprises wavelength-selective switches and light intersection equipment, 1 × N wavelength selector switch (WSS) is adopted: there is a road and close ripple signal input part in the present invention, the single ripple signal output part in N road, demultiplexing is carried out to DWDM signal, demultiplexing exports single ripple signal and enters light intersection equipment, and light intersection equipment has N road input signal interface, M road output signal interface, M is less than or equal to N, and namely the single ripple signal in N road needs to carry out selection output according to link.Wavelength chooses opens the light and to intersect equipment with light and jointly realize wavelength selective optical interleaving function, the structure chart of wavelength selective optical cross unit shown in Fig. 2 specific as follows;
The performance number of channel monitoring member monitors input optical signal, centre wavelength and signal to noise ratio parameter, and the performance number monitored, centre wavelength signal to noise ratio parameter are sent to signal condition unit.Signal condition unit to manage accordingly it according to the optical power value of monitoring and controls, and signal condition unit automatically carries out dispersion compensation to it and power controls.Channel monitoring unit is primarily of spectral analysis module and Drive and Control Circuit composition, first spectral analysis module amplifies input optical signal, spectral analysis module completes the monitoring of the performance number of input optical signal, centre wavelength and signal to noise ratio parameter, and these parameters are delivered to CPU analyze, Parameter analysis result delivers to signal condition unit through data bus interface.The figure of signal monitoring cellular construction shown in Fig. 3 specific as follows;
Signal condition unit mainly comprises adjustable optical attenuator (VOA) and dispersion compensation module.Adjustable optical attenuator can regulate the luminous power of each passage, makes it the requirement reaching system; Dispersion compensation module can compensate the dispersion of light signal, specifically signal condition cellular construction figure as shown in Figure 4.
According to the above description, the solution of the present invention can be realized in conjunction with art technology.
Claims (4)
1. have the intelligent wavelength selective optical cross system of signal condition function, it is characterized in that, system comprises: the wavelength selective optical cross unit, channel monitoring unit and the signal condition unit that are made up of wavelength chooses module WSS and light intersection equipment;
The DWDM signal coming from optical link is inputted by wavelength-selective switches WSS input, then light intersection equipment OXC is exported to from wavelength-selective switches WSS many output ports, intersect through light intersection equipment OXC, export to optical splitter by light intersection equipment OXC output port again, each optical splitter is connecting channel monitoring unit and signal condition unit respectively;
The light signal that every road output signal that light intersects equipment separates 5% ratio through optical splitter is connected to channel monitoring unit, and all the other light signals of 95% deliver to signal condition unit;
Channel monitoring unit is in order to monitor the performance number of input optical signal, centre wavelength and signal to noise ratio parameter, and the performance number monitored, centre wavelength signal to noise ratio parameter are sent to signal condition unit, signal condition unit to manage accordingly it according to the optical power value of monitoring and controls, and signal condition unit automatically carries out dispersion compensation to it and power controls;
Utilize wavelength-selective switches that DWDM signal is carried out demultiplexing, obtain Single wavelength light signal; As required, single ripple signal exports a direction of other nodes to through light intersection equipment, forms different links; Each output link separates a certain proportion of light signal to channel monitoring unit through optical splitter, and remaining is connected to signal condition unit.
2. there is the intelligent wavelength selective optical cross system of signal condition function as claimed in claim 1, it is characterized in that: wavelength-selective switches WSS adopts 1 × N wavelength selector switch WSS: there is a road and close ripple signal input part, the single ripple signal output part in N road, demultiplexing is carried out to DWDM signal, demultiplexing exports single ripple signal and enters light intersection equipment, light intersection equipment has N road input signal interface, M road output signal interface, M is less than or equal to N, and namely the single ripple signal in N road needs to carry out selection output according to link.
3. there is the intelligent wavelength selective optical cross system of signal condition function as claimed in claim 1, it is characterized in that: channel monitoring unit is primarily of spectral analysis module and Drive and Control Circuit composition, first spectral analysis module amplifies input optical signal, spectral analysis module completes the monitoring of the performance number of input optical signal, centre wavelength and signal to noise ratio parameter, and these parameters are delivered to CPU analyze, Parameter analysis result delivers to signal condition unit through data bus interface.
4. there is the intelligent wavelength selective optical cross system of signal condition function as claimed in claim 1, it is characterized in that: signal condition unit mainly comprises adjustable optical attenuator VOA and dispersion compensation module, the luminous power of adjustable optical attenuator to each passage regulates, and makes it the requirement reaching system; The dispersion of dispersion compensation module to light signal compensates.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105515651A (en) * | 2015-12-14 | 2016-04-20 | 天津光电通信技术有限公司 | Cross algorithm based on wavelength selective switch |
| CN107925482A (en) * | 2015-08-27 | 2018-04-17 | 日本电气株式会社 | Balanced device, repeater and communication system |
| CN109921849A (en) * | 2017-12-12 | 2019-06-21 | 光联通讯有限公司 | For optimizing the control device and method of the transmission performance of optical communication system |
| WO2022062215A1 (en) * | 2020-09-23 | 2022-03-31 | 武汉光迅科技股份有限公司 | Parameter adjustment method and apparatus, electronic device, and storage medium |
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