CN202231724U - Calibrating device of passive optical network optical power meter - Google Patents

Calibrating device of passive optical network optical power meter Download PDF

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Publication number
CN202231724U
CN202231724U CN2011204026892U CN201120402689U CN202231724U CN 202231724 U CN202231724 U CN 202231724U CN 2011204026892 U CN2011204026892 U CN 2011204026892U CN 201120402689 U CN201120402689 U CN 201120402689U CN 202231724 U CN202231724 U CN 202231724U
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power meter
light power
power
optical
epon
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詹志强
陆福敏
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Shanghai Institute of Measurement and Testing Technology
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Shanghai Institute of Measurement and Testing Technology
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Abstract

The utility model relates to a calibrating device of a passive optical network optical power meter, which comprises three light sources, a variable optical attenuator, a standard optical power meter, a standard passive optical network optical power meter, an optical network unit and an optical line terminal. The three light sources are used for the outputting luminous power of continuous data stream, the maximum output luminous power of the 1310nm wavelength is not smaller than 0dbm, the output luminous power of the 1490nm wavelength is not smaller than 0dbm, and the maximum output luminous power of the 1550nm wavelength is not smaller than 20dbm. When the luminous power of the continuous data stream of the passive optical network optical power meter is calibrated, the variable optical attenuator is connected with the light sources, and when the luminous power of burst data stream of passive optical network optical power meter is calibrated, the variable optical attenuator is connected with the optical network unit of a passive optical network. The standard optical power meter is used for calibrating the luminous power of the continuous data stream of the passive optical network optical power meter and connected with the variable optical attenuator. The optical network unit and the optical line terminal are used for calibrating the luminous power of burst data stream of passive optical network optical power meter.

Description

EPON light power meter calibrating installation
Technical field
The utility model relates to the calibration of light power meter, relates in particular to a kind of EPON (Passive OpticalNetwork, PON) light power meter calibrating installation.
Background technology
JJG965-2001 communication is with having stipulated the calibration steps of all general light power meter in the communication in the light power meter vertification regulation; This calibration steps is a direct comparison method; Its principle is shown in Fig. 1 a and Fig. 1 b, and the output of light source 11 is connected with the input of adjustable optical attenuator 12, and at first the output with said adjustable optical attenuator 12 is connected to etalon optical power meter 13; Set the output wavelength and the power output of said light source 11; Set the wavelength of said adjustable optical attenuator 12, regulate said adjustable optical attenuator 12, read the reading of said etalon optical power meter 13; Then break off being connected of said etalon optical power meter 13 and said adjustable optical attenuator 12; The output of said adjustable optical attenuator 12 is connected to is calibrated light power meter 14, read the said reading that is calibrated light power meter 14, the difference of the reading of said reading that is calibrated light power meter 14 and said etalon optical power meter 13 is the said measure error that is calibrated light power meter 14.But,, can not indiscriminately imitate above-mentioned calibration steps fully and calibrate for PON light power meter used in the EPON maintenance test.
A passive optical network PON comprises an optical line terminal (OpticalLine Terminal who is installed on console for centralized control; OLT); With a collection of supporting optical network unit that is installed on customer site (the OpticalNetwork Unit of level; ONU), (Optical DistributionNetwork ODN) has comprised optical fiber and passive optical splitters or coupler to the optical distribution between OLT and ONU.Used PON light power meter can be realized following function in the PON system maintenance test: (1) can be measured the luminous power of 1310nm, 1490nm and three kinds of wavelength of 1550nm simultaneously; (2) luminous power on-line measurement; (3) measure burst (burst) signal light power.Shown in Figure 2 is the schematic diagram of PON light power meter; Said PON light power meter adopts two header structures; Carry out beam split with 21 pairs of measurement circuits of bidirectional coupler; Carry out power and survey directly inserting first detector 22 after upward signal (1310nm) beam split, to after downstream signal (the 1490 and 1550nm) beam split earlier with high-isolation Wavelength division multiplexing(Wavelength Division Multiplexing; WDM) 23 wavelength is inserted second detector 24 respectively after separately again carry out the power detection with the 3rd detector 25; So just can survey the luminous power of 3 wavelength simultaneously, and network line can keep proper communication in measuring process.Therefore, the PON light power meter has two luminous power input ports: ONU port and OLT port, and the ONU port is used to measure the burst power of 1310nm, and the OLT port is used to measure the continuous wave power of 1490nm and 1550nm.
Can know that from Fig. 2 the calibration of PON light power meter can not be indiscriminately imitated JJG965-2001 communication fully with the calibration steps of stipulating in the light power meter vertification regulation, reason is following:
(1) mode of PON light power meter measurement power is the on-line measurement mode, and promptly the PON light power meter is a feed-through type power meter, rather than the terminal type light power meter among the JJG965-2001;
(2) luminous power of 1490nm/1550nm wavelength is measured in same passage;
(3) 1310nm burst measuring light power;
(4) 1550nm measures power and is not less than 20dBm.
The utility model content
The purpose of the utility model is to provide a kind of EPON light power meter calibrating installation, realizes the calibration to the PON light power meter.
In order to reach above-mentioned purpose; The utility model provides a kind of EPON light power meter calibrating installation; Used EPON light power meter in the maintenance test of calibration EPON; Said EPON light power meter calibrating installation comprises: first light source, and output 1550nm wavelength continuous data stream luminous power, peak power output is not less than 20dBm; Secondary light source, output 1490nm wavelength continuous data stream luminous power, maximum Output optical power is not less than 0dBm; The 3rd light source, output 1310nm wavelength continuous data stream luminous power, maximum Output optical power is not less than 0dBm; Adjustable optical attenuator; During calibration EPON light power meter continuous data stream luminous power; Said adjustable optical attenuator is connected with said light source, and during calibration EPON light power meter bursty traffic luminous power, said adjustable optical attenuator is connected with the optical network unit of said EPON; The etalon optical power meter during calibration EPON light power meter continuous data stream luminous power, is connected with said adjustable optical attenuator; Standard passive optical-fiber network light power meter during calibration EPON light power meter bursty traffic luminous power, is connected with said adjustable optical attenuator; Optical network unit during calibration EPON light power meter bursty traffic luminous power, is connected with said adjustable optical attenuator; And optical line terminal, be used to calibrate EPON light power meter bursty traffic luminous power.
Above-mentioned EPON light power meter calibrating installation, wherein, said first light source and secondary light source are distributed feed-back (DFB) tunable laser.
The EPON light power meter calibrating installation of the utility model; First light source (1550nm wavelength) is a power light source; Its peak power output is not less than 20dBm; Satisfy the requirement of calibration PON light power meter 1550nm wavelength continuous data stream luminous power, can realize calibration PON light power meter 1550nm wavelength continuous data stream luminous power; In addition, the PON light power meter calibrating installation of the utility model comprises standard P ON light power meter, optical line terminal and optical network unit, can realize the calibration to PON light power meter 1310nm bursty traffic luminous power.
Description of drawings
The EPON of the utility model (PON) light power meter calibrating installation is provided by following embodiment and accompanying drawing.
Fig. 1 a～Fig. 1 b is the calibration steps sketch map of JJG965-2001 communication with the general light power meter of stipulating in the light power meter vertification regulation.
Fig. 2 is the schematic diagram of PON light power meter.
Fig. 3 a～Fig. 3 b is the sketch map of calibration PON light power meter 1550nm wavelength continuous data stream luminous power in the utility model.
Fig. 4 a～Fig. 4 b is the sketch map of calibration PON light power meter 1490nm wavelength continuous data stream luminous power in the utility model.
Fig. 5 a～Fig. 5 b is the sketch map of calibration PON light power meter 1310nm wavelength continuous data stream luminous power in the utility model.
Fig. 6 a～Fig. 6 b is the sketch map of calibration PON light power meter 1310nm wavelength bursty traffic luminous power in the utility model.
Embodiment
Below will combine Fig. 3 a～Fig. 6 b that the EPON light power meter calibrating installation of the utility model is done further to describe in detail.
The PON light power meter calibrating installation of the utility model embodiment is used for calibrating the used PON light power meter of EPON maintenance test, and said PON light power meter calibrating installation comprises:
First light source is used to export 1550nm wavelength continuous data stream luminous power, and peak power output is not less than 20dBm;
Secondary light source is used to export 1490nm wavelength continuous data stream luminous power, and maximum Output optical power is not less than 0dBm;
The 3rd light source is used to export 1310nm wavelength continuous data stream luminous power, and maximum Output optical power is not less than 0dBm;
Adjustable optical attenuator; During calibration PON light power meter continuous data stream luminous power; Said adjustable optical attenuator is connected with said light source, and during calibration PON light power meter bursty traffic luminous power, said adjustable optical attenuator is connected with the optical network unit ONU of said EPON;
The etalon optical power meter is used to calibrate PON light power meter continuous data stream luminous power, is connected with said adjustable optical attenuator;
Standard P ON light power meter is used to calibrate PON light power meter bursty traffic luminous power, is connected with said luminous-power distributor;
Optical network unit is used to calibrate PON light power meter bursty traffic luminous power, is connected with said adjustable optical attenuator; And
Optical line terminal is used to calibrate PON light power meter bursty traffic luminous power.
First light source (1550nm wavelength) is a power light source in the PON light power meter calibrating installation of the utility model; Its peak power output is not less than 20dBm; Satisfy the requirement of calibration PON light power meter 1550nm wavelength continuous data stream luminous power, can realize calibration PON light power meter 1550nm wavelength continuous data stream luminous power; In addition, the PON light power meter calibrating installation of the utility model comprises standard P ON light power meter, optical line terminal and optical network unit, can realize the calibration to PON light power meter 1310nm bursty traffic luminous power.
Use the PON light power meter calibrating installation calibration PON light power meter of present embodiment may further comprise the steps:
Step 1, calibration PON light power meter 1550nm wavelength continuous data stream luminous power;
Shown in Fig. 3 a; Adjustable optical attenuator 32 is connected with the output 311 of first light source 31, and the peak power output of said first light source 31 is not less than 20dBm, earlier etalon optical power meter 33 is connected with the output 321 of said adjustable optical attenuator 32; The output wavelength of setting said first light source 31 is 1550nm; The wavelength of setting said adjustable optical attenuator 32 is 1550nm, and established standards light power meter 33 described wavelength are 1550nm, then set the power output of said first light source 31; Regulate the pad value of said adjustable optical attenuator 32, read the reading of said etalon optical power meter 33; Break off being connected of said etalon optical power meter 33 and said adjustable optical attenuator 32 again; The output 321 of said adjustable optical attenuator 32 is connected to the OLT port 51 of PON light power meter 50 to be calibrated; Shown in Fig. 3 b, read the 1550nm wavelength light power reading of said PON light power meter 50 to be calibrated; Repeatedly repeat above-mentioned steps and obtain many group correction datas, the difference of the reading of the reading of said PON light power meter 50 to be calibrated and said etalon optical power meter 33 is the measure error of said PON light power meter to be calibrated 50 1550nm wavelength continuous data stream luminous powers;
Said first light source 31 for example adopts 1550nm distributed feed-back (Distributed Feed Back, DFB) high power tunable laser;
Step 2, calibration PON light power meter 1490nm wavelength continuous data stream luminous power;
Shown in Fig. 4 a; Said adjustable optical attenuator 32 is connected with the output 341 of secondary light source 34, and the peak power output of said secondary light source 34 is not less than 0dBm, earlier said etalon optical power meter 33 is connected with the output 321 of said adjustable optical attenuator 32; The output wavelength of setting said secondary light source 34 is 1490nm; The wavelength of setting said adjustable optical attenuator 32 is 1490nm, and the wavelength of setting said etalon optical power meter 33 is 1490nm, then then sets the power output of said secondary light source 34; Regulate the pad value of said adjustable optical attenuator 32, read the reading of said etalon optical power meter 33; Break off being connected of said etalon optical power meter 33 and said adjustable optical attenuator 32 again; The output 321 of said adjustable optical attenuator 32 is connected to the OLT port 51 of said PON light power meter 50 to be calibrated; Shown in Fig. 4 b, read the 1490nm wavelength light power reading of said PON light power meter 50 to be calibrated; Repeatedly repeat above-mentioned steps and obtain many group correction datas, the difference of the reading of the reading of said PON light power meter 50 to be calibrated and said etalon optical power meter 33 is the measure error of said PON light power meter 501490nm wavelength continuous data stream luminous power to be calibrated;
Said secondary light source 34 for example adopts 1490nm DFB tunable laser;
Step 3, calibration PON light power meter 1310nm wavelength continuous data stream luminous power;
Shown in Fig. 5 a; Said adjustable optical attenuator 32 is connected with the output 351 of the 3rd light source 35, and the peak power output of said the 3rd light source 35 is not less than 0dBm, earlier said etalon optical power meter 33 is connected with the output 321 of said adjustable optical attenuator 32; The output wavelength of setting said the 3rd light source 35 is 1310nm; The wavelength of setting said adjustable optical attenuator 32 is 1310nm, and the wavelength of setting said etalon optical power meter 33 is 1310nm, then sets the power output of said the 3rd light source 35; Regulate the pad value of said adjustable optical attenuator 32, read the reading of said etalon optical power meter 33; Break off being connected of said etalon optical power meter 33 and said adjustable optical attenuator 32 again; The output 321 of said adjustable optical attenuator 32 is connected to the ONU port 52 of said PON light power meter 50 to be calibrated; Shown in Fig. 5 b, read the 1310nm wavelength light power reading of said PON light power meter 50 to be calibrated; Repeatedly repeat above-mentioned steps and obtain many group correction datas, the difference of the reading of the reading of said PON light power meter 50 to be calibrated and said etalon optical power meter 33 is the measure error of said PON light power meter to be calibrated 50 1310nm wavelength continuous data stream luminous powers;
Step 4, calibration PON light power meter 1310nm wavelength bursty traffic luminous power;
Shown in Fig. 6 a; Said adjustable optical attenuator 32 is connected with the optical network unit ONU 41 of EPON; ONU port 362 with standard P ON light power meter 36 is connected with the output 321 of said adjustable optical attenuator 32 earlier; The OLT port 361 of said standard P ON light power meter 36 is connected with the optical line terminal OLT 42 of said EPON, reads the 1310nm wavelength burst luminous power reading of said standard P ON light power meter 36; Break off being connected of said standard P ON light power meter 36 and said adjustable optical attenuator 32 again; Breaking off said standard P ON light power meter 36 is connected with the optical line terminal OLT 42 that reaches said EPON; The ONU port 52 of said PON light power meter 50 to be calibrated is connected with the output 321 of said adjustable optical attenuator 32; The OLT port output 31 of said PON light power meter 50 to be calibrated is connected with the optical line terminal OLT 42 of said EPON; Shown in Fig. 6 b, read the 1310nm wavelength burst luminous power reading of said PON light power meter 50 to be calibrated; Repeatedly repeat above-mentioned steps and obtain many group correction datas, the difference of the reading of the reading of said PON light power meter 50 to be calibrated and said standard P ON light power meter 36 is the measure error of said PON light power meter to be calibrated 50 1310nm wavelength bursty traffic luminous powers.
The existing EPON light power meter calibrating installation that specifies the utility model with specific embodiment:
The EPON light power meter calibrating installation of this enforcement comprises the 81600B-201 (tunable light source of 1455nm～1640nm); The 81634B light power meter; The 81570A adjustable optical attenuator; The 81654A1310nm/1550nm light source, 1550nm power output 20dBm power light source, PPM-350CPON light power meter.
PON light power meter to be calibrated is a PPM-350B PON light power meter for the model that EXFO company produces.
Calibration PPM-350B PON light power meter 1550nm wavelength continuous data stream luminous power: the 81570A adjustable optical attenuator is connected with 1550nm power output 20dBm power light source; Earlier the 81634B light power meter is connected with the 81570A adjustable optical attenuator; The output wavelength of setting 1550nm power output 20dBm power light source is 1550nm; The wavelength of setting the 81570A optical attenuator is 1550nm, and the wavelength of setting the 81634B light power meter is 1550nm, then sets the power output of 1550nm power output 20dBm power light source; Regulate the pad value of 81570A adjustable optical attenuator, read the reading of 81634B light power meter; Break off being connected of 81634B light power meter and 81570A adjustable optical attenuator again, the OLT port of PPM-350B PON light power meter is connected with the 81570A adjustable optical attenuator, read the 1550nm wavelength light power reading of PPM-350B PON light power meter; Repeatedly repeat above-mentioned steps and obtain many group correction datas, as shown in table 1:
Figure BDA0000100603510000071
Table 1
Calibration PPM-350B PON light power meter 1490nm wavelength continuous data stream luminous power: (1455nm～1640nm) tunable light source is connected the 81570A adjustable optical attenuator with 81600B-201; Earlier the 81634B light power meter is connected with the 81570A adjustable optical attenuator; The output wavelength of setting the 81600B-201 tunable light source is 1490nm; The wavelength of setting the 81570A adjustable optical attenuator is 1490nm, and the wavelength of setting the 81634B light power meter is 1490nm, then sets the power output of 81600B-201 tunable light source; Regulate the pad value of 81570A adjustable optical attenuator, read the reading of 81634B light power meter; Break off being connected of 81634B light power meter and 81570A adjustable optical attenuator again, the OLT port of PPM-350B PON light power meter is connected with the output of 81570A adjustable optical attenuator, read the 1490nm wavelength light power reading of PPM-350B PON light power meter; Repeatedly repeat above-mentioned steps and obtain many group correction datas, as shown in table 2:
Figure BDA0000100603510000072
Figure BDA0000100603510000081
Table 2
Calibration PPM-350B PON light power meter 1310nm wavelength continuous data stream luminous power: the 81570A adjustable optical attenuator is connected with 81654A 1310nm/1550nm light source; Earlier the 81634B light power meter is connected with the 81570A adjustable optical attenuator; The output wavelength of setting 81654A 1310nm/1550nm light source is 1310nm; The wavelength of setting the 81570A adjustable optical attenuator is 1310nm, and the wavelength of setting the 81634B light power meter is 1310nm, then sets the power output of 81654A 1310nm/1550nm light source; Regulate the pad value of 81570A adjustable optical attenuator, read the reading of 81634B light power meter; Break off being connected of 81634B light power meter and 81570A adjustable optical attenuator again, with PPM-350B PON light power meter the ONU port be connected with the 81570A adjustable optical attenuator, read the reading of the 1310nm wavelength light power of PPM-350B PON light power meter; Repeatedly repeat above-mentioned steps and obtain many group correction datas, as shown in table 3:
Figure BDA0000100603510000082
Table 3
Calibration PPM-350B PON light power meter 1310nm wavelength bursty traffic luminous power:
The 81570A adjustable optical attenuator is connected with the optical network unit of EPON; ONU end with the PPM-350CPON light power meter is connected with the 81570A adjustable optical attenuator earlier; The OLT end of PPM-350C PON light power meter is connected with the optical line terminal of EPON; Regulate the pad value of 81570A adjustable optical attenuator, read the 1310nm wavelength burst luminous power reading of PPM-350C PON light power meter; Break off being connected of PPM-350C PON light power meter and 81570A adjustable optical attenuator and optical line terminal again; The ONU port of PPM-350B PON light power meter is connected with the 81570A adjustable optical attenuator; The OLT port of PPM-350BPON light power meter is connected with optical line terminal, reads the 1310nm burst luminous power reading of PPM-350B PON light power meter; Repeatedly repeat above-mentioned steps and obtain many group correction datas, as shown in table 4:
Figure BDA0000100603510000091
Table 4
The utility model to the calibration range of 1550nm wavelength continuous data stream luminous power is-50dBm～20dBm; Calibration range to 1490nm wavelength continuous data stream luminous power is-60dBm～0dBm; Calibration range to 1310nm wavelength continuous data stream luminous power is-60dBm～0dBm; Calibration range to 1310nm wavelength bursty traffic luminous power is-60dBm～0dBm.
The EPON light power meter calibrating installation of the utility model can be realized the calibration to the whole parameters of PON light power meter.
Obviously, those skilled in the art can carry out various changes and modification to utility model and not break away from the spirit and the scope of the utility model.Like this, if these of the utility model are revised and modification belongs within the scope of the utility model claim and equivalent technologies thereof, then the utility model also is intended to comprise these change and modification.

Claims (2)

1. an EPON light power meter calibrating installation is calibrated used EPON light power meter in the EPON maintenance test, it is characterized in that said EPON light power meter calibrating installation comprises:
First light source, output 1550nm wavelength continuous data stream luminous power, peak power output is not less than 20dBm;
Secondary light source, output 1490nm wavelength continuous data stream luminous power, maximum Output optical power is not less than 0dBm;
The 3rd light source, output 1310nm wavelength continuous data stream luminous power, maximum Output optical power is not less than 0dBm;
Adjustable optical attenuator; During calibration EPON light power meter continuous data stream luminous power; Said adjustable optical attenuator is connected with said light source, and during calibration EPON light power meter bursty traffic luminous power, said adjustable optical attenuator is connected with the optical network unit of said EPON;
The etalon optical power meter during calibration EPON light power meter continuous data stream luminous power, is connected with said adjustable optical attenuator;
Standard passive optical-fiber network light power meter during calibration EPON light power meter bursty traffic luminous power, is connected with said adjustable optical attenuator;
Optical network unit during calibration EPON light power meter bursty traffic luminous power, is connected with said adjustable optical attenuator; And
Optical line terminal is used to calibrate EPON light power meter bursty traffic luminous power.
2. EPON light power meter calibrating installation as claimed in claim 1 is characterized in that said first light source and secondary light source are the distributed feed-back tunable laser.
CN2011204026892U 2011-10-20 2011-10-20 Calibrating device of passive optical network optical power meter Expired - Fee Related CN202231724U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105281825A (en) * 2014-07-11 2016-01-27 智邦科技股份有限公司 Test system and method
CN105515648A (en) * 2015-12-18 2016-04-20 成都广达新网科技股份有限公司 BOSA ON BOARD ONU module parameter calibration platform and working method thereof
CN106802183A (en) * 2016-11-30 2017-06-06 努比亚技术有限公司 A kind of photosensitive sensors calibration method and terminal

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105281825A (en) * 2014-07-11 2016-01-27 智邦科技股份有限公司 Test system and method
CN105281825B (en) * 2014-07-11 2017-12-19 智邦科技股份有限公司 Test system and method
CN105515648A (en) * 2015-12-18 2016-04-20 成都广达新网科技股份有限公司 BOSA ON BOARD ONU module parameter calibration platform and working method thereof
CN106802183A (en) * 2016-11-30 2017-06-06 努比亚技术有限公司 A kind of photosensitive sensors calibration method and terminal

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