CN100373822C - Analog test method for stability of optical communication equipment system - Google Patents
Analog test method for stability of optical communication equipment system Download PDFInfo
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- CN100373822C CN100373822C CNB2004100695844A CN200410069584A CN100373822C CN 100373822 C CN100373822 C CN 100373822C CN B2004100695844 A CNB2004100695844 A CN B2004100695844A CN 200410069584 A CN200410069584 A CN 200410069584A CN 100373822 C CN100373822 C CN 100373822C
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Abstract
The present invention relates to a simulation test method for the stability of a system of an optical communication device, which comprises the following steps: a, the optical communication device to be tested is accessed into an optical network; b, a programmable adjustable optical attenuator is accessed between the light receiving end of the optical communication device to be tested and a laser generator; c, the attenuation of the programmable adjustable optical attenuator is changed through control software so that the optical power received at the light receiving end of the optical communication device to be tested can change; d, after the normal optical power is restored, whether the system of the optical communication device to be tested works normally or not is tested. The adoption of the test method of the present invention can control the abnormal time and the amplitude of the optical power and test the system stability of the optical communication device under the conditions of the instantaneous jump of the optical power, the continuous jump of the optical power, etc.
Description
Technical field
The present invention relates to optical communication product test field.
Background technology
For the communication equipment that uses light signal; the signal generation ANOMALOUS VARIATIONS of optical receiving end; such as optical fiber because the environmental change of outer room makes its inner laser generation condition of instant error decay even be interrupted; after abnormal restoring appears in the light receiving terminal; can device systems promptly recover normally, is an importance weighing an optical communication equipment stability.
Fig. 1 is a simple MSP network, and as shown in the figure, NE1-NE4 is an optical network communication equipment, the closed loop net that this MSP network is made up of by optical fiber optical network communication equipment.After NE2 accepts to note abnormalities from first group of optical fiber; network can normally be protected; after light signal recovers; network protection will be carried out recovery after the regular hour; but NE2 is after accepting light signal appearance unusually; if the NE2 system can not correctly handle, after light signal recovered so, there will be two kinds of situations with regard to possibility for network:
Network back execute protection at the appointed time recovers;
Network back execute protection at the appointed time recovers, but after recovering, network occurs unusual.
Fig. 1 only is a simple example; every equipment that relates to optical signal interface all might occur unusual and makes system handles not normal in external optical signals; thereby after making that system's external optical signals exceptional condition is recovered; system can not normally recover, and all these problems may occur such as SDH (optical synchronization digital transmission system), GE (gigabit light mouth Ethernet), FE (100,000,000 light mouth Ethernet) or the like.Therefore, necessary for the unusual stability test of light mouth for these equipment.
In existing technology, mainly carry out the abnormality test of light mouth by following two methods:
1) carries out the abnormality test of light mouth by plug optical fiber or pass broken hair laser.
2) carry out the abnormality test of light mouth by adjusting mechanical attenuator.
Above two methods bigger defective is all arranged:
(1) abnormality test time of the control light mouth of the plug optical fiber in the method one oversize (unusually at least more than 100ms), and the time of closing the broken hair laser lack very much (generally in 1ms), between 1ms～100ms unusually, this method can't be controlled substantially; This method can only be carried out break-make control in addition, can't carry out the control of luminous power decay pattern of anomaly.
(2) the method for testing control time in the method two very long, it is unusual often to need second time of level to produce corresponding luminous power; And this method is difficult to carry out the quick break-make control of light.
In sum, method of testing of the prior art is difficult to carry out unusual time control of luminous power and amplitude control, and this just causes being difficult to carry out the abnormality test of aspects such as luminous power moment sudden change, the continuous sudden change of luminous power.
Summary of the invention
The invention provides a kind of stability of a system analog detection method of optical communication equipment, comprise the following steps:
A) tested equipment is inserted in the optical-fiber network;
B) between the optical receiving end of tested equipment and laser generator, insert a variable optical attenuation device;
C) produce time dependent control signal by described variable optical attenuation device according to test parameter, produce corresponding light decrement, the luminous power that optical receiving end received of tested equipment is changed according to the control signal size;
D) behind the recovery normal light power, whether the system that detects tested equipment is working properly.
Describedly produce time dependent control signal, specifically comprise according to test parameter:
2-D data according to test parameter generation time and attenuation;
Produce the control signal of corresponding size by the attenuation of current time correspondence.
Described step C) comprising:
31) regulate the optical power attenuation amount by Control Software, make tested equipment little error code occur, keep several seconds levels after the time, recover normal light power;
32) regulate the optical power attenuation amount by Control Software, make tested equipment the alarm of big error code or higher level occur, keep several seconds levels after the time, recover normal light power;
33) regulate the optical power attenuation amount by Control Software, make tested equipment high-level alarm occur, keep several seconds levels after the time, recover normal light power.
Described step C) comprising:
41) produce the burst low optical power by Control Software, make this low optical power in the tolerance limit of tested equipment, keep several Milliseconds after the time, recover normal light power;
42) produce the burst low optical power by Control Software, the tolerance limit that makes this low optical power be a bit larger tham tested equipment keeps several Milliseconds after the time, recovers normal light power;
43) produce the burst low optical power by Control Software, make this low optical power exceed the tolerance limit of tested equipment by a small margin, keep several Milliseconds after the time, recover normal light power;
44) produce the burst low optical power by Control Software, make this low optical power exceed the tolerance limit of tested equipment significantly, keep several Milliseconds after the time, recover normal light power.
Described step C) comprising:
51) produce repeatedly low optical power continuously by Control Software, each holding time of low optical power is Millisecond, and be Millisecond blanking time, and make this low optical power in the tolerance limit of equipment, recovers normal light power afterwards;
52) produce repeatedly low optical power continuously by Control Software, each holding time of low optical power is Millisecond, and be Millisecond blanking time, and the tolerance limit that makes this low optical power be a bit larger tham tested equipment, recovers normal light power afterwards;
53) produce repeatedly low optical power continuously by Control Software, each holding time of low optical power is Millisecond, and be Millisecond blanking time, and make this low optical power exceed the tolerance limit of tested equipment by a small margin, recovers normal light power afterwards;
54) produce repeatedly low optical power continuously by the Control Software generation, each holding time of low optical power is Millisecond, and be Millisecond blanking time, and make this low optical power exceed the tolerance limit of tested equipment significantly, recovers normal light power afterwards.
The control signal of described generation is voltage signal or current signal.
Adopt method of testing of the present invention, can carry out control of luminous power abnormal time and amplitude control, realize to optical communication equipment under situations such as luminous power moment sudden change, the continuous sudden change of luminous power the test of the stability of a system.
Description of drawings
Fig. 1 is a MSP optical-fiber network schematic diagram of the prior art.
Fig. 2 is the inventive method embodiment block diagram.
Fig. 3 is the inventive method test flow chart.
Fig. 4 is one of the inventive method embodiment block diagram.
Fig. 5 is two of the inventive method embodiment block diagram.
Fig. 6 is three of the inventive method embodiment block diagram.
Embodiment
Referring to Fig. 2, the MSP optical-fiber network of forming a closed loop by optical communication equipment NE1-NE4, make the optical receiving end of tested equipment NE2 connect a program control variable optical attenuation device, this program control variable optical attenuation device comprises four functional modules, as shown in the figure, be respectively parameter input/output module, test parameter explanation module, current decay control module and the generation module of decaying fast.Fig. 3 is the workflow schematic diagram of above-mentioned four functional modules, and the function of each module is as follows:
Described parameter input/output module can be passed through the hardware keyboards input parameter, is read by the Control Software in this device; Perhaps, be input in this program control variable optical attenuation device by interface by the computer software output parameter;
The test parameter explanation module makes an explanation by the parameter of software to input, mainly is the 2-D data according to corresponding time of these parameter generating and attenuation;
Current decay control module produces a control signal (voltage signal or current signal) according to the attenuation of current time, and this control signal is delivered to quick decay generation module;
The decay generation module produces corresponding attenuation according to the control signal of current decay control module output fast, and the control optical signal power produces corresponding the variation.
Fig. 4 tests the block diagram of stability of optical communication equipment system under the unusual low optical power situation of simulation.Its test philosophy as mentioned above, its concrete method of testing is as follows:
(1) slowly regulates the optical power attenuation amount by Control Software, make tested equipment fragmentary problem (such as little error code) occur, keep (such as level time second) after one long period, after the recovery luminous power is normal, detects tested equipment and in the regular hour, whether can recover normal automatically;
(2) slowly regulate the optical power attenuation amount by Control Software, make tested equipment more serious problem occur (such as big error code, more serious alarm or the like perhaps appears), keep (such as level time second) after one long period, after the recovery luminous power is normal, detects tested equipment and in the regular hour, whether can recover normal automatically;
(3) slowly regulate the optical power attenuation amount by Control Software, make tested equipment very serious problem (such as alarm of the LOF among the SDH or LOS and so on or the like) occur, keep (such as level time second) after one long period, after the recovery luminous power is normal, detects tested equipment and in the regular hour, whether can recover normal automatically.
Fig. 5 tests the block diagram of stability of optical communication equipment system under the simulation burst low optical power situation.Its test philosophy as mentioned above, its concrete method of testing is as follows:
(1) produce the burst low optical power by Control Software, its low optical power is in the tolerance limit of equipment, and generally producing abnormal time t is Millisecond, after the recovery luminous power is normal, detects tested equipment and whether can recover normal automatically in the regular hour;
(2) produce the burst low optical power by Control Software, its low optical power has exceeded the tolerance limit (such as little error code) of equipment slightly, general generation abnormal time t is a Millisecond, after the recovery luminous power is normal, detects tested equipment and whether can recover normal automatically in the regular hour;
(3) produce the burst low optical power by Control Software, its low optical power has the tolerance limit (such as big error code) that has exceeded equipment to a certain extent, general generation abnormal time t is a Millisecond, after the recovery luminous power is normal, detects tested equipment and whether can recover normal automatically in the regular hour;
(4) produce the burst low optical power by Control Software, its low optical power head and shoulders above the tolerance limit of equipment (such as alarm of the LOF among the SDH or LOS and so on or the like), general generation abnormal time t is a Millisecond, after the recovery luminous power is normal, detects tested equipment and in the regular hour, whether can recover normal automatically.
Fig. 6 tests the block diagram of stability of optical communication equipment system under the continuous low optical power situation of simulation.Its test philosophy as mentioned above, its concrete method of testing is as follows:
(1) produces continuous low optical power by Control Software, its low optical power is in the tolerance limit of equipment, general abnormal time t1, the blanking time t2 of producing is a Millisecond, read-around ratio n is tens, hundreds of or more than several thousand times, after the recovery luminous power is normal, detects tested equipment and in the regular hour, whether can recover normal automatically;
(2) produce continuous low optical power by Control Software, its low optical power has exceeded the tolerance limit (such as little error code) of equipment slightly, general abnormal time t1, the blanking time t2 of producing is a Millisecond, read-around ratio n is tens, hundreds of or more than several thousand times, after the recovery luminous power is normal, detects tested equipment and in the regular hour, whether can recover normal automatically;
(3) produce continuous low optical power by Control Software, its low optical power has the tolerance limit (such as big error code) that has exceeded equipment to a certain extent, general abnormal time t1, the blanking time t2 of producing is a Millisecond, read-around ratio n is tens, hundreds of or more than several thousand times, after the recovery luminous power is normal, detects tested equipment and in the regular hour, whether can recover normal automatically;
(4) produce continuous low optical power by Control Software, its low optical power head and shoulders above the tolerance limit of equipment (such as alarm of the LOF among the SDH or LOS and so on or the like), general abnormal time t1, the blanking time t2 of producing is a Millisecond, read-around ratio n is tens, hundreds of or more than several thousand times, after the recovery luminous power is normal, detects tested equipment and in the regular hour, whether can recover normal automatically.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claims.
Claims (6)
1. the stability of a system analog detection method of an optical communication equipment comprises the following steps:
A) tested equipment is inserted in the optical-fiber network;
B) between the optical receiving end of tested equipment and laser generator, insert a variable optical attenuation device;
C) produce time dependent control signal by described variable optical attenuation device according to test parameter, produce corresponding light decrement, the luminous power that optical receiving end received of tested equipment is changed according to the control signal size;
D) behind the recovery normal light power, whether the system that detects tested equipment is working properly.
2. the stability of a system analog detection method of optical communication equipment as claimed in claim 1 is characterized in that: describedly produce time dependent control signal according to test parameter, specifically comprise:
2-D data according to test parameter generation time and attenuation;
Produce the control signal of corresponding size by the attenuation of current time correspondence.
3. the stability of a system analog detection method of optical communication equipment as claimed in claim 1 is characterized in that: described step C) comprising:
31) regulate the optical power attenuation amount by Control Software, make tested equipment little error code occur, keep several seconds levels after the time, recover normal light power;
32) regulate the optical power attenuation amount by Control Software, make tested equipment the alarm of big error code or higher level occur, keep several seconds levels after the time, recover normal light power;
33) regulate the optical power attenuation amount by Control Software, make tested equipment high-level alarm occur, keep several seconds levels after the time, recover normal light power.
4. the stability of a system analog detection method of optical communication equipment as claimed in claim 1 is characterized in that: described step C) comprising:
41) produce the burst low optical power by Control Software, make this low optical power in the tolerance limit of tested equipment, keep several Milliseconds after the time, recover normal light power;
42) produce the burst low optical power by Control Software, the tolerance limit that makes this low optical power be a bit larger tham tested equipment keeps several Milliseconds after the time, recovers normal light power;
43) produce the burst low optical power by Control Software, make this low optical power exceed the tolerance limit of tested equipment by a small margin, keep several Milliseconds after the time, recover normal light power;
44) produce the burst low optical power by Control Software, make this low optical power exceed the tolerance limit of tested equipment significantly, keep several Milliseconds after the time, recover normal light power.
5. the stability of a system analog detection method of optical communication equipment as claimed in claim 1 is characterized in that: described step C) comprising:
51) produce repeatedly low optical power continuously by Control Software, each holding time of low optical power is Millisecond, and be Millisecond blanking time, and make this low optical power in the tolerance limit of equipment, recovers normal light power afterwards;
52) produce repeatedly low optical power continuously by Control Software, each holding time of low optical power is Millisecond, and be Millisecond blanking time, and the tolerance limit that makes this low optical power be a bit larger tham tested equipment, recovers normal light power afterwards;
53) produce repeatedly low optical power continuously by Control Software, each holding time of low optical power is Millisecond, and be Millisecond blanking time, and make this low optical power exceed the tolerance limit of tested equipment by a small margin, recovers normal light power afterwards;
54) produce repeatedly low optical power continuously by the Control Software generation, each holding time of low optical power is Millisecond, and be Millisecond blanking time, and make this low optical power exceed the tolerance limit of tested equipment significantly, recovers normal light power afterwards.
6. the stability of a system analog detection method of optical communication equipment as claimed in claim 1, it is characterized in that: the control signal of described generation is voltage signal or current signal.
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| CNB2004100695844A CN100373822C (en) | 2004-07-20 | 2004-07-20 | Analog test method for stability of optical communication equipment system |
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| CNB2004100695844A CN100373822C (en) | 2004-07-20 | 2004-07-20 | Analog test method for stability of optical communication equipment system |
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| CN100373822C true CN100373822C (en) | 2008-03-05 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9419710B2 (en) | 2014-08-22 | 2016-08-16 | Corning Optical Communications LLC | Active optical cable assemblies and methods for thermal testing thereof |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106159907A (en) * | 2015-04-14 | 2016-11-23 | 北京北广科技股份有限公司 | A kind of over-current protection method of high-power transmitter |
| CN109450732A (en) * | 2018-11-16 | 2019-03-08 | 郑州云海信息技术有限公司 | A kind of test method, device, terminal and the storage medium of analog optical fiber on-off |
| CN115833941B (en) * | 2023-01-10 | 2023-05-16 | 中天通信技术有限公司 | DWDM optical module APD debugging method, electronic equipment and computer readable storage medium |
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| US20020149812A1 (en) * | 2001-04-17 | 2002-10-17 | Junhua Hong | Method and procedures for system test and verification of optical networks using noise injection/loading |
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Patent Citations (3)
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| US6532087B1 (en) * | 1998-07-29 | 2003-03-11 | Ciena Corporation | Multiple signal Q-tester |
| US20020149812A1 (en) * | 2001-04-17 | 2002-10-17 | Junhua Hong | Method and procedures for system test and verification of optical networks using noise injection/loading |
| US20040090616A1 (en) * | 2001-04-23 | 2004-05-13 | French John Sargent | Automated system and method for optical measurement and testing |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US9419710B2 (en) | 2014-08-22 | 2016-08-16 | Corning Optical Communications LLC | Active optical cable assemblies and methods for thermal testing thereof |
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