Some standard content:
National Metrology Verification Regulations of the People's Republic of China JJG 958—2000
Stabilized Lastr Sources for Optical Transmi2000—12—12 Issued
Implementation on 2001—03-01 Issued by the State Administration of Quality and Technical Supervision
J.1695—2000
Verification Regulations of Stabilized Lascr Snurces for Optical TransmitJJG 958-
—200 This regulation was approved by the State Administration of Quality and Technical Supervision on December 12, 200 Approved on 2001 and implemented on March 1, 2001.
Responsible unit: National Optical Measurement Technology Committee Drafting unit: Telecommunications Metrology Center of the Ministry of Information Industry This regulation is entrusted to the Telecommunications Metrology Center of the Ministry of Information Industry for the drafting of this regulation Main drafters of this regulation:
Participating drafters:
JEG 958—2000
(Telecommunications Measurement Center of the Ministry of Information Industry)
(Telecommunications Measurement Center of the Ministry of Information Industry)
Measuring performance requirements
General technical requirements
Control of measuring instruments
Processing of calibration results and calibration period
Table A
Format of calibration records
Appendix C
Format of the inner page of the calibration certificate
Uncertainty analysis
JJG 958
（(6)
1 Scope
JJG 958-2000
Verification procedure for stable light source for optical transmission
This procedure applies to the initial verification, subsequent verification and in-use inspection of stable light source equipment for optical transmission. 2 Overview
Stable light source for optical transmission (hereinafter referred to as stable light source) is an essential component in the laying, maintenance, scientific research and production of telecommunication lines. It is an indispensable ignition device for stable light source in the measurement of optical fiber attenuation, measurement of line connection loss, loss of various active connectors, and measurement of sensitivity change of photoelectric components and receivers. It is a laser (LD) or light emitting diode (LE1) with a wavelength of 1310nm or 1550nm. 3 Metrological performance requirements
3.1 The output power (maximum) of the light source shall be consistent with that given in the instruction manual. 3.2 Time stability of the low power output of the light source
3..1 The long-term (5h) stability shall be better than ±0.2d. 3.2.2 The short-term (15min) stability shall be better than ±.02dB3.3 The spectral characteristics of the source shall be consistent with those given in the instruction manual. 4 General technical requirements
The source to be tested shall be in the following state: specification, number, manufacturer name, equipment number, the stable light source as a test unit shall be equipped with manufacturing () status and corresponding indication marks, all parts, buttons, switches, etc. shall be in normal working order, without looseness, all joints shall be tightly matched and in good contact. The instrument should be in good condition and should not have any damage during use. The inspected light source should have an instruction manual. 5. Measuring instrument control
Measuring instrument control includes: initial calibration, post-calibration and in-use inspection. Initial calibration is performed on newly purchased light sources by the customer or newly produced by the manufacturer. The calibration should meet the requirements of Article 3. Subsequent calibration includes calibration within the validity period, periodic calibration and calibration after repair: During subsequent calibration, the last calibration certificate should be available, and the light source should have the corresponding calibration mark: In-use inspection is to check whether the calibration mark or calibration certificate is valid: whether the mark is damaged, whether the status has changed, and whether it is out of tolerance.
5.1 Calibration system
5.1.1 Calibration environment
5.1.1.1 Environment temperature: (2015)℃
JJG958—2000
5.1-1.2 Temperature change during the stabilization period: =2t5.1.1.3 Relative humidity: 85%
$.1.1.4 Power supply voltage: 220+11) V
The laboratory should be free of permanent vibration and electromagnetic interference that may affect the measurement results. 5.1.1.5
See Table 1 for calibration equipment.
Calibration equipment
Optical power
Variable optical attenuation
Optical analysis only
Standard optical fiber
Calibration items see Table 2..
Qualification items
Output power
Short-term stability
Long-term stability
Center length
Optical width
Note: "-" is not the width.
Special parameters
Working wavelength (-100) nm
Measurement range + 13 ~ - 90 Bm
Uncertainty 5%
Resolution 1pW: Current accuracy: ±1.5eW
Input mode: Fiber input or optical input Working wavelength (800-)60) nm
Dynamic modulation (0~60) continuously adjustable
Input range 3.5
Output mode: Fiber input or optical beam input Working wavelength (800-1000) nm
Uncertainty ±21.5nm
Resolution ±0.5mnt
Equipped with FC/PC type optical fiber connector, and the length is not less than 2m, suitable for multi-mode and single-mode optical fiber
Table 2 Verification Items
First Verification
Full Verification
In-use Inspection
Instructions for use, if the product is not a qualified product, the center of the inspection should be checked for flow and light harmony. 5.2.1 External and normal inspection
JJG958—2000
5.2.1.! The inspected stable light source should be accompanied by necessary accessories, instructions and the previous verification certificate. 5.2:1.2 The inspected stable light source should be accompanied by necessary accessories, instructions and the previous verification certificate. All components of the light source should be firmly installed and ensure normal operation. 5.2.1.3 The light source to be tested should be powered on and the quality should be normal. 5.2.2 Determination of output power When measuring the output power and stability of a stable light source, the light source to be tested should be in a continuous light (CW) output state: 5.2.2.2 Select the corresponding optical power meter according to the output power and wavelength range of the light source to be tested. According to the composition of the test system. Determine the technical source ||Figure 1 Output power verification system non-Figure
5.2.2.4 Turn on the stable light source to be tested and make it in a continuous output state. 5.2.2.5 Turn on the optical power meter and perform zero calibration. The optical power meter is set to zero. 5.2.2.5, 1 When the light source is output in the form of a beam, make the beam perpendicular to the center of the detection and reliably pass the calibration. 5.2.2.5.2 When the light source is output in the form of an optical fiber, use an optical fiber to connect. 5.2.2.6 Before calibration, all calibration The equipment and the light source to be tested should be preheated as required. 5.2.2.7 During measurement: record the optical power value P every 30 to 60 seconds, measure 3 times in total, and take the average value to get the output power Put
5.2.3 Output power stability test
The characteristic of the output power P of the light source changing with the time t is called the output power time stability R of the light source:
1 For a total light source with readable power, when testing the dynamometer, the setting is 5.2.3.1 The measurement system is composed of Figure 2. If the upper limit of the output optical power of the stable light source is within the range of the optical power meter, the optical attenuator in Figure 2 can be slightly larger: If the output optical power of the stable light source is higher than the measured value of the optical power meter, adjust the attenuation value of the optical attenuator to make the optical efficiency value reach the measurement upper limit, stable light source
5.2.3.2 Turn on the stable light source,
Optical attenuator
Figure 2 Output power measurement system frame Photoelectric efficiency certification
JJC,958--2000
5.2.3.3 Properly explain the light transmission, and calibrate the optical attenuator. 5.2.3.3:1 When the light source is output in the form of light, the optical attenuator shall use the old beam type. During the test, the external vibration should be minimized to avoid the change of the irradiation position caused by the test. 5.2.3.4 Before the test, the new test equipment and the tested light source should be preheated as required. 5.2.3.5 Short-term stability
According to the specified time interval, record the light penetration value F: The total test time is no more than 15min, and the light dynamic rate value (10)
or, 2.3.6 Long-term micro-measurement
At regular time intervals, record the light block penetration value P, the total measurement time! No less than 5h, measure the optical power level (2)
Wuzhong: Pu, fsin
or Zhong:
Puu - P'en × 100%
- The maximum and minimum optical power values are measured during the time; the average value of the output light rate within the time: measurement number (10)
The rate stability can be expressed in percentage, and can also be expressed in terms of attenuation. Stability is the ratio of R to white. The conversion is as follows: =) × e( +)
R,= 1010
5.2.4 Spectral Characteristic Determination
5.2.4.[According to Figure 3 or a single system,
stable optical attenuator
Spectral Characteristic of Figure 3 will determine the system
5.2.4.1.1 Verify whether the maximum receiving power of the optical harmonic meter is a specific output power of the stable light source. If necessary, the optical attenuator in Figure 3 can be used for measurement. The source is connected to the optical path: if small, adjust the optical attenuator value so that the optical power value of the input light is smaller than the maximum receiving power of the spectrometer. 5.2.4.1.2 Determine the thermal spectrometer, optical attenuation group and the stable light source to be tested. 4
JJG958—2000
5.2.4.2 Set the spectrometer to the state of testing the spectrum characteristics of the light source. 5.2.4,3 Verification of the center wavelength
5.2.4.3,1 When the light source is a light emitting diode (LED), set the spectrometer to the state of testing the light characteristics of the light emitting diode (LED) light source, scan the range of the nominal value of the center wavelength = 100m, and record the displayed center wavelength An.
5,2.4.3.2: When the light source is a laser diode (LD), set the spectrometer to test the spectrum state of the laser diode (1,1)) light source, and traverse the nominal value of the center wavelength = 25n range. Record the displayed center wavelength according to the spectrum curve:
Where: P is the total optical power of the light source:
5.2.4.4 Spectral bandwidth measurement
S.2.4.4.1 Light emitting diode (LED) light source optical harmonic bandwidth measurement, set the light amplifier to measure Test the spectrum state of the light-emitting diode (LED) light source and make measurements. 5.2.4.4.2 Spectral bandwidth measurement of the low-light diode (LD) light source. Set the spectrum to test the spectrum state of the laser diode (LD) light source and make measurements: S.2.4.4.3 The spectrum bandwidth takes the maximum laser half-power point width (FWHM): 5.2.4.4.4: For a stable light source whose light-emitting element is a distributed feedback (DFB) flat conductor laser, the optical harmonic band is defined as the full width when the power relative to the central wavelength of the card drops by 20B. 6 Verification result processing and verification cycle
6.1 For a stable light source that meets the requirements of this regulation after verification, its verification certificate shall be issued. If the verification does not meet the requirements of this regulation, a verification result notice shall be issued and the unqualified items shall be pointed out. 6.2 The verification cycle shall generally not exceed 1 year.
Appendix A
1 Head
Verification Certificate
Name of Instrument
Manufacturer
Plug-in Model
Working Length
Appearance Change Working Status Inspection Record
Previous Verification Certificate
JJG95A—200
Verification Record Format
Original Record Table of Maximum Output Power Verification Result 3
Test Release
Output Power Ratio
Output Power Pa
Original Record Table of Stability Verification Result
Short Attachment Stability Verification:
Send Inspection unit
Part number
Long time stability inspection:
Average power value
Maximum value Prarx
Minimum value Prin-
Short time stability R,
JJG958-200D
Detection result of fixed light source spectrum characteristic original record center wavelength cup name
Center natural length measured value
Nominal value of optical band
Optical harmonic bandwidth measured value
Testing date
Inspector
Three: Automatic measurement, retain the correction result. Average dynamic value
Maximum value Pmax
Minimum value P
Long-term stability R,
Relative humidity
Appendix
Model:
T.Operating wavelength:
Output rate:
Stability:
Short stability:
Long stability:
Center wavelength:
Spectral width:
Verification date
G 4958—2000
Verification certificate inner page format
No.:
Relative humidityLarge value Prarx
Small value Prin-
Short time stability R, one
JJG958-200D
Shift light source spectral characteristics calibration results original record center wavelength cup name
Center natural length measured value
Light band nominal time
Optical harmonic bandwidth measured valuebZxz.net
Pick up date
Calibrator
Inspector
Three: Accumulate good female automatic measurement, retain the correction result. Average dynamic value
Maximum value Pmax
Minimum value P
Long-term stability R,
Relative humidity
Appendix
Model:
T.Operating wavelength:
Output rate:
Stability:
Short stability:
Long stability:
Center wavelength:
Spectral width:
Verification date
G 4958—2000
Verification certificate inner page format
No.:
Relative humidityLarge value Prarx
Small value Prin-
Short time stability R, one
JJG958-200D
Shift light source spectral characteristics calibration results original record center wavelength cup name
Center natural length measured value
Light band nominal time
Optical harmonic bandwidth measured value
Pick up date
Calibrator
Inspector
Three: Accumulate good female automatic measurement, retain the correction result. Average dynamic value
Maximum value Pmax
Minimum value P
Long-term stability R,
Relative humidity
Appendix
Model:
T.Operating wavelength:
Output rate:
Stability:
Short stability:
Long stability:
Center wavelength:
Spectral width:
Verification date
G 4958—2000
Verification certificate inner page format
No.:
Relative humidity
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