CN201717867U - Wavelength division multiplexing test system - Google Patents
Wavelength division multiplexing test system Download PDFInfo
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- CN201717867U CN201717867U CN2010202252964U CN201020225296U CN201717867U CN 201717867 U CN201717867 U CN 201717867U CN 2010202252964 U CN2010202252964 U CN 2010202252964U CN 201020225296 U CN201020225296 U CN 201020225296U CN 201717867 U CN201717867 U CN 201717867U
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Abstract
The utility model discloses a wavelength division multiplexing test system which comprises an error code analyzer, a signal output circuit and a signal receiving circuit, wherein the error code analyzer, the signal output circuit and the signal receiving circuit are serially connected with one another so as to form a loop; the input ends and the output ends of the signal output circuit and the signal receiving circuit are respectively provided with N wavelength converting units, and the N wavelength converting units at the output end of the signal output circuit are connected with that at the input end of the signal receiving circuit; the first wavelength converting unit at the input end of the signal output circuit is connected with the error code analyzer; and the Nth wavelength converting unit at the output end of the signal receiving circuit is connected with the error code analyzer, and the other wavelength converting units are serially connected with the other wavelength converting units at the input end of the signal output circuit one to one. As for the wavelength division multiplexing test system, all the test wave paths are cascaded and connected to the error code analyzer finally, thus realizing cascaded test of the primary system and reflecting the communication quality of all the tested wave paths.
Description
Technical field
The utility model relates to a kind of communication test system, refers to a kind of test macro that is used to detect WDM especially.
Background technology
Wavelength division multiplexing is a kind of transmission technology in the optical fiber communication, it has utilized an optical fiber can transmit the characteristics of the light carrier of a plurality of different wave lengths simultaneously, can applicable wave-length coverage be divided into several wave bands to optical fiber, each wave band is made an independently light signal of a kind of predetermined wavelength of channel transfer, and the effect of wavelength-division multiplex system is the utilance that improves Internet resources, signal bandwidth.But because wavelength-division multiplex technique is higher to the required precision of device, the technology that realizes is comparatively complicated, in order to guarantee validity and the accuracy of wavelength-division multiplex system in transport communication, according to ITU-T suggestion and YD/T 5092-2005 toll cable wavelength division multiplexing (WDM) transmission system project design specification, the wave-division device performance index are tested, wherein an important content measurement is exactly an error rate of system, and it is the important indicator of reaction system quality.Error code can cause signal quality to descend, data-signal is produced packet loss voice signal in digital communication, so that the test of error rate of system seems in communication engineering is particularly important.
Cooperate Fig. 1 described, existing method of testing is for to be serially connected with a bit error analyzing instrument 10 in the signal transmission loop 20, and transmission one wavelength is the signal of λ in signal transmission loop 20, utilizes this bit error analyzing instrument 10 to come the detection system error rate then;
But, wavelength-division multiplex system is with forming by the individual modulated multiplexed optical wave of N (nowadays N generally is 40,80), and existing detection system can only be carried out independent error code testing to each radio frequency channel (wavelength X), the error rate of all wave bands of test can have been spent and the chien shih duration become very long when many like this, and therefore existing test macro truly has further improved necessity.
Summary of the invention
The technical problems to be solved in the utility model is to provide a kind of novel wavelength division multiplexing test macro, and test is shortened the duration greatly, thereby the usage charges of instrument, labour cost, transportation expenses decline to a great extent, and make enterprise play the cost efficiency effect.
For solving the problems of the technologies described above, the utility model provides a kind of wavelength division multiplexing test macro, comprise a bit error analyzing instrument, one output line Lu Yuyi signal receiving lines, described bit error analyzing instrument, the output line road is connected in series mutually with the signal receiving lines and forms a loop, the input of described output line road, signal receiving lines and output are respectively equipped with N wavelength conversion unit, and N wavelength conversion unit of described output line road output and described signal receiving lines input connects one to one; The 1st wavelength conversion unit of described output line road input connects described bit error analyzing instrument, the N wavelength conversion unit of described signal receiving lines output connects described bit error analyzing instrument, and residue N-1 wavelength conversion unit of described signal receiving lines output is serially connected with residue N-1 wavelength conversion unit of described output line road input one by one.
The utility model utilizes the unidirectional multiplexing reconciliation multiplexing transmission principle of wavelength-division multiplex system, at far-end the test radio frequency channel is done loopback, local terminal carries out cascade with each test radio frequency channel and is connected to code error tester at last, thereby makes primary system cascade test, reflects the communication quality of all tested radio frequency channels.
Further improvement of the utility model is: be connected with the variable light attenuator between the wavelength conversion unit of described output line road output and the wavelength conversion unit of described signal receiving lines input; Be connected with the variable light attenuator between the wavelength conversion unit of described output line road input and described signal receiving lines output; Be connected with the variable light attenuator between the wavelength conversion unit of described bit error analyzing instrument and described output line road input; Be connected with the variable light attenuator between the wavelength conversion unit of described bit error analyzing instrument and described signal receiving lines output; The received optical power of controlling each path by the variable light attenuator is operated in the constant power bracket whole system, and it is controlled to reach balance.
Description of drawings
Fig. 1 is the schematic circuit of prior art test macro;
Fig. 2 is the schematic circuit of the utility model test macro.
Embodiment
Below in conjunction with accompanying drawing the utility model is further described.
Consult shown in Figure 2ly, test macro of the present utility model comprises a signal transmission loop 30 and the bit error analyzing instrument 40 that is serially connected with on this signal transmission loop 30, wherein:
This signal transmission loop 30 comprises an output line road 50 and a signal receiving lines 60, the input on output line road 50 is provided with N wavelength conversion unit 51, the output on output line road 50 also is provided with N wavelength conversion unit 52, between wavelength conversion unit 51 and wavelength conversion unit 52, be serially connected with wave multiplexer 53, optical line amplifier 54 and channel-splitting filter 55;
Similarly, the input of signal receiving lines 60 is provided with N wavelength conversion unit 61, the output of signal receiving lines 60 also is provided with N wavelength conversion unit 62, is serially connected with wave multiplexer 63 between wavelength conversion unit 61 and wavelength conversion unit 62, optical line amplifier 64 and channel-splitting filter 65;
N the wavelength conversion unit 52 of output line road 50 outputs connects one to one with N wavelength conversion unit 61 of signal receiving lines 60 inputs, thereby forms the signal loopback; The 1st wavelength conversion unit 51 of output line road 50 inputs connects the output of bit error analyzing instrument 40, the N wavelength conversion unit 62 of signal receiving lines 60 outputs connects the input of bit error analyzing instrument 40, residue N-1 wavelength conversion unit 62 of signal receiving lines 60 outputs is serially connected with residue N-1 wavelength conversion unit 51 of output line road 50 inputs one by one, and the cascade of so just having finished all test radio frequency channels connects;
Be connected with variable light attenuator 70 between the wavelength conversion unit 61 of the wavelength conversion unit 52 of output line road 50 outputs and signal receiving lines 60 inputs; Be connected with variable light attenuator 70 between the wavelength conversion unit of output line road 50 inputs and signal receiving lines 60 outputs; Be connected with variable light attenuator 70 between the wavelength conversion unit of bit error analyzing instrument 40 and output line road 50 inputs; Be connected with variable light attenuator 70 between the wavelength conversion unit of bit error analyzing instrument 40 and signal receiving lines 60 outputs; Adjust luminous power by these variable light attenuators 70, whole system is operated in the constant power bracket, it is controlled to reach balance.
During native system work, SDH signal process variable light attenuator 70 by bit error analyzing instrument 40 output pseudo noise codes, be adjusted to and meet the light signal that wavelength conversion unit 51 receives, the 1st wavelength conversion unit 51 by output line road 50 inputs, the wavelength of optical signal of this first ripple is modulated into to having the light signal λ 1 of specific wavelength, the first ripple signal λ 1 is output as an optical carrier with other modulated lightwave signals through wave multiplexer 53 then, process optical line amplifier 54 is sent to far-end optical branching filter 55 after signal is amplified, through after the partial wave, decomposite all wavelength-division signals, the first ripple signal λ 1 that decomposites restores the SDH signal of the first via after wavelength conversion unit 51 modulation, after adjusting luminous power, variable light attenuator 70 seals in the first ripple λ, 1 wavelength conversion unit 61 of signal receiving lines 60, the wavelength-modulated of the wavelength conversion unit 61 by first ripple becomes the light signal λ 1 with specific wavelength, the first ripple signal λ 1 is output as an optical carrier with other modulated lightwave signals through wave multiplexer 63 then, advanced and be sent to local terminal channel-splitting filter 65 after optical line amplifier 64 amplifies signal, through after the partial wave, decomposite all wavelength-division signals, the first ripple signal λ 1 that decomposites restores the SDH signal of the first via after wavelength conversion unit 62 modulation of signal receiving lines 60 outputs, after adjusting luminous power, variable light attenuator 70 is cascaded to the second ripple λ, 2 wavelength conversion units 51 on output line road 50, repeat above process again and output to the receiving terminal of bit error analyzing instrument 40, thereby the cascade of finishing all test radio frequency channels connects until receiving wavelength conversion unit 62 modulation from N ripple signal λ n at last.
Claims (3)
1. a wavelength division multiplexing test macro comprises a bit error analyzing instrument, an output line Lu Yuyi signal receiving lines, and described bit error analyzing instrument, the output line road is connected in series mutually with the signal receiving lines and forms a loop, it is characterized in that:
The input of described output line road, signal receiving lines and output are respectively equipped with N wavelength conversion unit, and N wavelength conversion unit of described output line road output and described signal receiving lines input connects one to one;
The 1st wavelength conversion unit of described output line road input connects described bit error analyzing instrument, the N wavelength conversion unit of described signal receiving lines output connects described bit error analyzing instrument, and residue N-1 wavelength conversion unit of described signal receiving lines output is serially connected with residue N-1 wavelength conversion unit of described output line road input one by one.
2. the system as claimed in claim 1 is characterized in that: be connected with the variable light attenuator between the wavelength conversion unit of described output line road output and the wavelength conversion unit of described signal receiving lines input;
Be connected with the variable light attenuator between the wavelength conversion unit of described output line road input and described signal receiving lines output;
Be connected with the variable light attenuator between the wavelength conversion unit of described bit error analyzing instrument and described output line road input;
Be connected with the variable light attenuator between the wavelength conversion unit of described bit error analyzing instrument and described signal receiving lines output.
3. system as claimed in claim 1 or 2 is characterized in that: be serially connected with wave multiplexer, optical line amplifier and channel-splitting filter between N the wavelength conversion unit of the input of described output line road, signal receiving lines and output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202252964U CN201717867U (en) | 2010-06-12 | 2010-06-12 | Wavelength division multiplexing test system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202252964U CN201717867U (en) | 2010-06-12 | 2010-06-12 | Wavelength division multiplexing test system |
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| Publication Number | Publication Date |
|---|---|
| CN201717867U true CN201717867U (en) | 2011-01-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010202252964U Expired - Lifetime CN201717867U (en) | 2010-06-12 | 2010-06-12 | Wavelength division multiplexing test system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108370277A (en) * | 2015-12-03 | 2018-08-03 | 代表亚利桑那大学的亚利桑那校董会 | The quick detection of signal quality in wavelength division multiplexed network |
-
2010
- 2010-06-12 CN CN2010202252964U patent/CN201717867U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108370277A (en) * | 2015-12-03 | 2018-08-03 | 代表亚利桑那大学的亚利桑那校董会 | The quick detection of signal quality in wavelength division multiplexed network |
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| C14 | Grant of patent or utility model | ||
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| CX01 | Expiry of patent term |
Granted publication date: 20110119 |
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| CX01 | Expiry of patent term |