CN101908927B - Method for extrapolating and testing sensitivity of light receiving device - Google Patents
Method for extrapolating and testing sensitivity of light receiving device Download PDFInfo
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- CN101908927B CN101908927B CN201010201226XA CN201010201226A CN101908927B CN 101908927 B CN101908927 B CN 101908927B CN 201010201226X A CN201010201226X A CN 201010201226XA CN 201010201226 A CN201010201226 A CN 201010201226A CN 101908927 B CN101908927 B CN 101908927B
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Abstract
The invention discloses a method for extrapolating and testing the sensitivity of a light receiving device. A specific value of the sensitivity of the light receiving device with an error rate below 1.0E-10 order of magnitude can be quickly and accurately found by acquiring values of corresponding error rates at different orders of magnitude under different light signal input intensities of the light receiving device. By using the technical scheme of the invention, the specific value of the sensitivity of the light receiving device with the error rate below 1.0E-10 order of magnitude can be accurately extrapolated under the preset light signal intensity; and the method has the characteristic of obviously improving the testing efficiency.
Description
Technical field
The present invention relates to the optical communication technology field, relate in particular to a kind of method of extrapolating and testing sensitivity of light receiving device.
Background technology
In the index that receives optical device, a very important parameter index " sensitivity " is arranged, the implication of this parameter index is to satisfy the minimum input optical power that certain error rate requires, and is the decisive technical indicator of the up operating distance in restriction base station.In general production requirement, the sensitivity that receives optical device be test under the error rate of 1.0E-10 requires, can keep not occurring in the certain hour error code, the luminous power of minimum input.
In the present reception optical device sensitivity index test, adopt the method for measurement sensitivity thresholding usually, promptly provide one and can meet the requirements of input optical power, within a certain period of time, whether do not have error code to produce; If the measurement sensitivity occurrence, general method of approaching commonly used.Promptly first never error code begins, and progressively increases attenuation, up to error code occurring; And then progressively reduce attenuation, up to there not being error code; Test certain hour again, do not have error code to produce really again, then the input optical power of this moment is exactly the sensitivity occurrence that receives optical device.
In the reception optical device sensitivity index test of routine, if adopt the test of sensitivity threshold method, can only obtain more general sensitivity index, and can not embody the individual difference that receives optical device; And, can influence production efficiency if the reception optical device of low rates such as 155/622MBd needs test not have the time of error code longer.If but adopt the approximatioss measurement sensitivity; Owing to need optical attenuator be set repeatedly and read error code according to stepping that increases attenuation and the stepping that reduces attenuation; Need the labor time; This has had a strong impact on production cost and production efficiency for the reception optical device sensitivity index test of mass.
Summary of the invention
The objective of the invention is to propose a kind of method of extrapolating and testing sensitivity of light receiving device, with the automatic test function of the light receiving device spare sensitivity index that achieves a butt joint.
In order to achieve the above object; The present invention provides a kind of method of extrapolating and testing sensitivity of light receiving device; May further comprise the steps: the Output optical power of adjustable attenuator is set to the order of magnitude scope of the reception optical device sensitivity error rate at 1.0E-n, and this n is not less than 5 natural number; The Output optical power that reduces this adjustable attenuator make this error rate be reduced to respectively 1.0E-(n+1), 1.0E-(n+2) ..., 1.0E-(n+m) the order of magnitude; Read the reception optical device error rate of this difference error rate order of magnitude through the bit error analyzing appearance, this m is not less than 3 natural number; According to luminous power array that obtains and error rate array, this error rate array is got denary logarithm, obtain error rate logarithm array; With this error rate logarithm array negate, get denary logarithm once more, obtain array one; Use the least square fitting straight line with array one and this luminous power array; Obtain the sensitivity under the specific bit error rate through this fitting a straight line.
This n can be 5, can be 6.
This m can be 3, can be 4.
In the time of after reducing the Output optical power of this adjustable attenuator, can't obtaining the error rate of this order of magnitude, process ends.
After obtaining the reception optical device error rate of this difference error rate order of magnitude, judge whether that each this error rate all is greater than 0 less than 1, if then keep, otherwise gives up.
According to luminous power array that obtains and error rate array, this error rate array is got denary logarithm, obtain error rate logarithm array; With this error rate logarithm array negate, get denary logarithm once more, obtain array one; Can handle through special software with the step of least square fitting straight line with array one and this luminous power array, and directly export the sensitivity under this specific bit error rate through this special software.
The present invention is with the distinguishing characteristics of the reception optical device sensitivity test of existing routine, through obtaining the error rate of varying number level, releases the sensitivity under the requirement of the 1.0E-10 order of magnitude error rate outward.
The method of extrapolating and testing sensitivity of light receiving device of the present invention is accurately controlled under preset light input signal intensity and is received optical device error rate state, the automatic test function of the light receiving device spare sensitivity index that achieves a butt joint.Adopted technical scheme of the present invention, can in the short period, extrapolate and receive optical device sensitivity comparatively accurately, had the advantages that to raise the efficiency.
Description of drawings
Fig. 1 is a hardware unit structural representation of the present invention.
Fig. 2 is the main-process stream block diagram of a specific embodiment of the method for extrapolating and testing sensitivity of light receiving device of the present invention.
Fig. 3 be extrapolating and testing sensitivity of light receiving device of the present invention method a specific embodiment detail flowchart.
Embodiment
Further specify technical scheme of the present invention below in conjunction with accompanying drawing and through embodiment.
Fig. 1 is a hardware unit structural representation of the present invention; Measured device 103 is positioned on the test platform 102; Adjustable attenuator 104 these measured devices 103 of control light signal input; Bit error analyzing appearance 105 is analyzed the error rate of these measured device 103 output signals, and this adjustable attenuator 104, bit error analyzing appearance 105, test platform 102 link to each other with PC computer 101.
Fig. 2 is a specific embodiment main-process stream block diagram of the method for extrapolating and testing sensitivity of light receiving device of the present invention.The sensitivity of the test error rate under 1.0E-10 requires.As shown in Figure 2, this flow process comprises following steps:
Step 204, the special software processes of use, the fitting a straight line of the error rate array after obtaining the luminous power array and handling, and the sensitivity of output error rate under the 1.0E-10 condition.
Fig. 3 is the detail flowchart of the method for extrapolating and testing sensitivity of light receiving device of the present invention.Through the error rate of the error rate at 1.0E-6,1.0E-7,1.0E-8, the 1.0E-9 order of magnitude, the sensitivity of the test error rate under 1.0E-10 requires.This sketch map has been introduced each step of extrapolation test reception optical device sensitivity in detail:
Step 301, flow process begin.
Step 304, because the order of magnitude of the error rate is not in preset state, so need be according to the situation of concrete order of magnitude difference, the step value of adjustment adjustable attenuator arrives step 305 then.
Step 307, change the output light intensity of current adjustable attenuator, obtain the error rate of each correspondence according to predefined step value.
Whether the element number of the error rate array that step 308, judgement are read has reached predefined number; If there are not enough element numbers, then go to step 307; If the number of array element is enough, then go to step 309.
In order enough to extrapolate the value that receives optical device sensitivity accurately, the element number of error rate array is abundant.Such as under each one magnitude condition of 1.0E-6,1.0E-7,1.0E-8,1.0E-9, can adjust step value, be that each order of magnitude can both get access to the corresponding error rate.First point of error rate array preferably guarantees under the 1.0E-6 order of magnitude then.If the luminous intensity of predefined adjustable attenuator output can not satisfy, then need the time update preset value.
Secondly, be with the element deletion of not satisfying 0＜error rate＜1 in the error rate array, with the accuracy that guarantees to calculate.
Table one is for using extrapolation measurement sensitivity and Agilent86130 instrument test data relatively:
| Use Agilent86130 | Use extrapolation | |
| Receive the concrete sensitivity of optical device A (dBm) | -32.8 | -32.91 |
| Receive the concrete sensitivity of optical device B (dBm) | -33.2 | -33.25 |
| Receive the concrete sensitivity of optical device C (dBm) | -33.2 | -33.26 |
| Receive the concrete sensitivity of optical device D (dBm) | -32.8 | -32.72 |
| Receive the concrete sensitivity of optical device E (dBm) | -33.2 | -33.31 |
Table one
The above; Be merely the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, anyly is familiar with this technological people in the technical scope that the present invention disclosed; The variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.
Claims (7)
1. the method for an extrapolating and testing sensitivity of light receiving device is characterized in that, may further comprise the steps:
The Output optical power of adjustable attenuator is set to the order of magnitude scope of the reception optical device sensitivity error rate at 1.0E-n, and said n is a natural number;
The Output optical power that reduces said adjustable attenuator make the said error rate be reduced to respectively 1.0E-(n+1), 1.0E-(n+2) ..., 1.0E-(n+m) the order of magnitude; Read the reception optical device error rate of the said different error rate orders of magnitude through the bit error analyzing appearance, said m is not less than 3 natural number;
According to luminous power array that obtains and error rate array, said error rate array is got denary logarithm, obtain error rate logarithm array;
With the negate of said error rate logarithm array, get denary logarithm once more, obtain array one;
Use the least square fitting straight line with array one and said luminous power array;
Obtain the sensitivity under the specific bit error rate through said fitting a straight line.
2. the method for extrapolating and testing sensitivity of light receiving device according to claim 1 is characterized in that, said n is 5.
3. the method for extrapolating and testing sensitivity of light receiving device according to claim 1 is characterized in that, said n is 6.
4. the method for extrapolating and testing sensitivity of light receiving device according to claim 1 is characterized in that, said m is 3.
5. the method for extrapolating and testing sensitivity of light receiving device according to claim 1 is characterized in that, said m is 4.
6. the method for extrapolating and testing sensitivity of light receiving device according to claim 1 is characterized in that, in the time of after reducing the Output optical power of said adjustable attenuator, can't obtaining the error rate of the said order of magnitude, and process ends.
7. the method for extrapolating and testing sensitivity of light receiving device according to claim 1; It is characterized in that, after the reception optical device error rate that obtains the said different error rate orders of magnitude, judge whether that each said error rate all is less than 1 greater than 0; If then keep, otherwise give up.
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| CN201010201226XA CN101908927B (en) | 2010-06-17 | 2010-06-17 | Method for extrapolating and testing sensitivity of light receiving device |
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| CN102324986B (en) * | 2011-05-25 | 2013-11-06 | 哈尔滨工业大学 | Methods for testing sensitivity of wireless communication product in ISM frequency band |
| CN103457671B (en) * | 2013-07-02 | 2016-04-27 | 青岛海信宽带多媒体技术有限公司 | The defining method of optical receiver sensitivity and device |
| CN103630780B (en) * | 2013-11-22 | 2016-08-17 | 武汉电信器件有限公司 | Detector sensitivity optimal value and the Auto-Test System of overload values and method thereof |
| CN105680935A (en) * | 2016-02-01 | 2016-06-15 | 深圳市共进电子股份有限公司 | Method, device and system for detecting optimum working voltages of receiving ends of GPON (Gigabit-capable passive optical networks) system |
| CN107919908A (en) * | 2017-12-29 | 2018-04-17 | 上海航天科工电器研究院有限公司 | A kind of optical module receiving terminal sensitivity test system and its test method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003090766A (en) * | 2001-07-13 | 2003-03-28 | Nippon Telegr & Teleph Corp <Ntt> | Method and apparatus for monitoring optical signal quality deterioration factor |
| CN1988418A (en) * | 2005-12-23 | 2007-06-27 | 中兴通讯股份有限公司 | Method for automatic scaling light module |
| CN201369728Y (en) * | 2008-12-02 | 2009-12-23 | 成都新易盛通信技术有限公司 | Optical module receiving end performance testing device |
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| US8320758B2 (en) * | 2008-05-01 | 2012-11-27 | Aegis Lightwave, Inc. | Channel monitor and method for estimating optical power |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2003090766A (en) * | 2001-07-13 | 2003-03-28 | Nippon Telegr & Teleph Corp <Ntt> | Method and apparatus for monitoring optical signal quality deterioration factor |
| CN1988418A (en) * | 2005-12-23 | 2007-06-27 | 中兴通讯股份有限公司 | Method for automatic scaling light module |
| CN201369728Y (en) * | 2008-12-02 | 2009-12-23 | 成都新易盛通信技术有限公司 | Optical module receiving end performance testing device |
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