GB/T 15175-1994 Test methods for main parameters of solid-state lasers
Some standard content:
VpC621.375.826
National Standard of the People's Republic of China
GB/T15175—94
Measurement methods for mainparametcr of solid-state lasers1994-08-20 IssuedWww.bzxZ.net
National Technical Supervision Bureau
1995-04-01 Implementation
National Standard of the People's Republic of China
Measurement methods for mainparametcr of solid-state lasers 1. Scope of application
This standard covers the wet test method for solid lasers (hereinafter referred to as solid lasers) CB/T15175-94
This standard is applicable to the test of the main parameters of various types of continuous wave, repetitive pulse, pulse (including pulse train) lasers. 2. Reference standards
Your optical product transmission change enterprise, equipment distribution, requirements and user guide GB7257 Random laser test location S1879 Gas laser emission angle test method 3.1 Solid laser nlid statelazer
A laser that uses a small amount of sensitive glass or crystal as the working material is called a statelazer. 3.2 A continuous wave laser (CW laser) is a laser that outputs a continuous wave of light. It is not a laser that outputs a continuous wave of light for a period of less than 0.25 seconds. 3.3 A laser that produces a series of super-intensity pulses of radiation. 3.4 A pulsed laser
Releases energy in the form of a single pulse or a pulse train, and the pulse duration is less than or equal to 1.2 seconds. A single pulse is called a pulse train.
3.5 Working current When the laser is working, the working current of the pump source is called the working current of the pump source. 36 Working conditions The working conditions of the laser refer to its working mode and working duration. 4 General requirements 4.1 Test conditions 4.1.1 Test environment 4.1.1.1 Unless otherwise specified in the standard, the test shall be carried out under the following normal atmospheric conditions: a. Temperature: 15~35C b. Relative humidity: 45~75%, c. Pressure: 86~106kHa. Approved by the State Administration of Technical Supervision on August 20, 1994 and implemented on April 1, 1995 GB/T15175-94 4.1.1.2 The entire test system shall be in an environment without obvious vibration, air quality, smoke and dust. 1. It shall not affect the test results.
4.1.2 Test equipment
4.1.2.1 The test equipment should meet the requirements and should be in compliance with the current specifications. 4.1.2.2 The micro-light function meter used for the test should be below 1.5 and should be calibrated by the test department at regular intervals. 4.1.2.3 The test equipment should be calibrated by the test department at regular intervals and should be within the validity period. 4.1.2.4 For the purpose of "protection from unqualified faults", it is allowed to use protective devices on the test equipment, which should not affect the test accuracy.
4.1.3 Safety protection when testing the parameters of the optical device should comply with the relevant provisions of Chapter 3 of GB7247. 4.2 Micro-light device
Unless otherwise specified, the micro-light device should be in compliance with the relevant provisions of the detailed specifications. Work under the operating sequence and working conditions, and measure the relevant parameters after the laser stabilizes:
4.3 Test preparation
Unless otherwise specified, the numerical test shall be prepared according to the requirements:, and the test system shall be composed according to the relevant parameter test method or schematic diagram: Prepare the test conditions according to the requirements of 4.1
The laser to be tested shall be prepared according to the requirements of 4.3. 5 Continuous wave laser circuit main parameter test method 5.1 Output power
5.1.1 Specification
Under the specified operating conditions and small protection current, the protection rate of the micro-light age in the gradual mountain output. 5.1.2 Test method
5. 1. 2 Cabinet
Appeal diagram: New requirements
1.-Laser source; 2 Laser products: 3 Light room, 1--reduction film (necessary time 1 soldier with% laser film to sit time> heart laser yield meter
5.1.2-2 to the test process card
5.1.2.2.1 Read the test preparation see 4.3.
51-2.2.2 will melt the optical power meter probe the meaning of the hidden laser output beam, and make it all short receiving 5.1.2.2.3 stall laser dynamic room meter also source. Select the range upgrade calibration 5.1.2.2.4 Read the power readings at regular intervals (e.g. 3min) (before each measurement, the instrument must be confirmed to be back to the initial state). The output power is calculated by the formula 1:
Where, \—auxiliary activation rate, w
full emission ratio of the filter: 1,
—narrow band filter avoidance ratio, %:
! Test the fifth time
GB/T15175-94
—The output power obtained for the first time is appropriate, 5. 1. 2. 3 ±, the main error source
due to improper use of optical power:
only the error of the instrument,
the error caused by the filter and the full optical filter. 5.1.2. 4 Special requirements
specified in the detailed specifications,
the accuracy of the micro optical power meter:
the allowable error of the filter, narrow band filter: b.
others.
5.2 Output power instability
5.2.1 Definition
Under given working conditions, the characteristics of the laser output power over time (less than 1Ha) within a specified time period are shown in Figure 2. 5.2.2 Measurement method
5. 2.2. 7 The method of measuring the power of the laser is shown in Figure 2.
【Acid source-device is required (> narrow band light slice when necessary): laser power meter recorder
5.2.2.2 Test sequence
5. 2-2. 2 1 Test preparation See 4. 1, 5-2-2.2.2 Aim the laser power meter probe at the laser beam so that it receives all of it. 5.2.2.2.3 Turn on the power of the laser power meter, use the appropriate voltage, and calibrate its zero point. 5.2.2.2.4 Operate the laser detector at the specified current T. 5.2.2.2.5 Record the output wave curve of the laser detector, the time is (20.5h). 5-2.2.2.6 Obtain the average value of the variable curve according to the time interval: P (5 times): 5.2.2.2. Obtain the maximum and minimum values on the recording curve: GH/T 15175-94 AP = PW-Pnr 5.2.2.2.8 Obtain the output power instability of the laser within the time range according to formula (41) or formula (5): 1×10% output power instability, % APu (3> formula, W; P——(2) formula W
S, the maximum relative instability of output power; P.. See, 5.2.2.2.7, W1
See 5.2. 2. 2. Y, W.
5.2.2.3 Main sources of error
Poor optical power control, deviation, slow time response! The time response of the recorder is not fast enough:
Improper data processing
6-2.2.4 Special requirements
The optical power meter probe should have high sensitivity and fast enough time response to the received light, and can be used under the specified power density a.
, without him and the current home;
, the test system requires linearity within the measured power range: c The recording accuracy should not be less than 10 levels,
5.3 Fast mode
5. 3. 1 In the transverse plane of the output beam of the micro-optical device, the field structure with one or more large values of the transverse field is called the transverse mode mode, denoted as TEM; the field structure with only one large value of the lateral field strength is called the single mode, denoted as TEM-1, and the transverse field structure with high light speed is called the single mode, that is, the transverse field strength is a Gaussian function of the distance from the beam axis. 5 3. 2 Experimental method - pinhole scanning method
5.3.2.1 Block diagram
The block diagram is shown in Figure 3.
1·Digital laser excitation source 12 laser; 3--Production standard 4--Recorder 5.3-2.2 Test method
5.3.2.2.1 Test preparation See 4.3
5-3.2.2.2 Make the laser operate at a given working voltage 5.3.2.2.3 Make the laser beam directly incident on the head of the intensity distribution measurement instrument, and the probe hole on the light intensity distribution measurement instrument is directly facing the center of the light. Use the light distribution measurement instrument to automatically scan the light beam, and record the light intensity distribution curve of the light beam (i.e. the relative spatial distribution curve) in double recording.
GI/T 15175:94
5.3.2.2.4 Analyze the light intensity distribution curve. If it is a Gaussian distribution, it is judged to be a fundamental mode (single mode), otherwise it is a multi-mode. 5.3.2.3 Main sources of error
Light intensity distribution measuring instrument error:
b, instrument error:
c Error caused by unstable laser output power. 5.3.3 Test method! Spherical scanning laser beam method (Zhongliang method) Spherical scanning laser beam method See GB7257 No. 9.5.4 (Gaussian light) Single spot diameter and divergence angle 5.4 1 Definition
, the diameter of the beam at all points on the beam surface from which the power (energy) is reduced to the central value is called the single beam diameter at the beam waist s.
b. Definition of beam emission at high beam waist 5: X10
wherein, d, beam diameter at beam waist s, mm3—the distance from which the beam height is measured, mm
divergence angle+mrad
, beam waist position and beam height 5 are determined in the detailed specification. 5.4.2 Test method
For the test method, see Chapter 2 to Section 3 of SJ1R79. 5.5 Multimode optical beam length diameter and emission agent
5.5.1 Determination Definition
-(6)
: The diameter d of the core part of the beam cross section that accounts for 63% of its total power (energy) is called the multimode beam diameter at the high waist S.
The light divergence at the beam 3 is:
In the formula, 8: Multi-mode light divergence angle mrad
4. The multimode light diameter at the beam S, when actually measured, is the diameter of the small beam on the focal plane of the long focal length microscope:
The distance of the beam waist is specified in the spectral specification. In principle, it is the distance from the beam waist to the infinite crown. In actual measurements, it is the distance from the long focal length microscope to the infinite crown. mm. This meaning also applies to the following optical instruments. 5.5.2 Test method 1 (heating method)
5.5.2.1 Block diagram
Block diagram is shown in Figure 4.
GH/115175-94
1 Laser source (must be) long energy distance 1:5 small milky sky diameter can be enjoyed) optical property 6 optical power (energy clear meter 5.5.2-2 Test procedure
5.5.2.2.1 Test equipment see.3 system.
5.5.2.2.2 Place the long you loan mirror ten from the waist distance (such as 1m>, 5.5.2.2-3 select the power (energy) to make it compatible with the laser power (energy) 5.5.2 .2.4 The small optical property (its true love error is not large, the main 0.5mm pole grid is not more than 3%) is located at the thermal plane E of the lens at a distance of 1.5.5.7.2.5 Adjust the signal of the light in the X.Y direction to make the power (salt) meter receive the power (can be seen as 1 turn larger, 5.5.2.2.6 Remove the light bar and read the laser output power P... (can be seen as W...). .5-5-2-2.7 Change the aperture of the small aperture bar and repeat the measurement procedure 5.5.2.2.5: to obtain the light diameter when the power is equal to U.53P.. (can be seen as equal to 0.63W,. .
5.5.2.2.8 Quickly subtract <8) [calculate the beam angle X 10
Where:
beam emission diameter nd:
d.- aperture diameter, mm
f- lens focal length, mm
5.5.2.3 Ten major sources of error
identification of the pinhole optical diameter:
reading error caused by the aperture aperture
error caused by improper aperture placement
d, error caused by the test accuracy and its adverse effects c.
error caused by the fluctuation of the imager output during the test 5. 5.3 Test 1 Select an appropriate test method (Article 5.5.2 or 5.4.2) to measure the true diameter of the received beam (or the light output data) at two different distances, and use formula (9) to calculate the average divergence angle: d: d × 101, s is the ratio of the point of departure or the output end of the laser beam (SS), mm2-1.5 mm2.5.6 Deviation test See GB7257 Section 15, 5.7 Optical product deviation 5.7.1 Definition B/T75175-94 The maximum angle of the light center from the optical axis within a certain period of time (such as 1h>). 5.7.2 Test method 5.7.2.1 Schematic diagram The schematic diagram is shown in Figure 5. 1 Laser micro-channel 2 Inducer 3 Optical network 4 Variable width transmitter 5 Long-distance gate 6 Optical filter 5-7.2-2 Test procedure 5.7-2-2. 1 Test standard see 4.3. 5.72.2.2 Place the telephoto lens in a high beam spread-fixed distance (beam waist position) as specified in the detailed specification 1.5.7.2.2.3 Move the micro-optic device under a given current. 5.7.2-.2.4 Change the attenuation plate to test the desired light source located on the focal plane of the lens. 5.7.2.2.5 Expose the light source 10 times within a certain period of time, and each time a spot is exposed on the photosensitive paper. 5.7.2.2.6 On the photosensitive paper, take the center of the light spot density area as the axis center, and 5.1.2.2.7 measure the distance of the light source center on the photosensitive paper from the axis center. AR5.7.2.2.B Quick method (10) Calculate the maximum deviation of the beam: 8
The maximum deviation of the case, mrud:
The radial deviation of the center of the beam from the optical axis, mm:..Mirror distance.mm.
5.7.2.3 Main sources of error
a Error in distance measurement:
, error caused by the small positioning of the optical modem.
5.7.3 Test method 1 (secondary method)
Xie Minfang sent 167257 Chapter 8
5. The full length
wavelength measurement method is compared with 6.11,
Reading value test see 6.10,
5.10 Efficiency, slope efficiency
5. 10.7 When the laser is operated under specified working conditions, the ratio of its output efficiency to its input efficiency is called slope efficiency. When the laser is operated under specified working conditions, the ratio of its output efficiency to its input efficiency is called slope efficiency. 5.10.2 Test method 5.10.2.1 Block diagram The block diagram is shown in Figure 6. 5.10.2.2 Test procedure GB/T 15175—94
1-12 laser excitation source; 3 power meter 5.10.2.2.1 Test preparation see 4.3.
5-10.2.2.2 Aim the power meter at the micro beam, and receive it completely. 5.10.2.2.3 Change the input power of the laser and measure its corresponding output power. Measure each test point (10 times) and take the average. 5.10.2.2.4 Test results will show the initial input-output characteristics of the laser, as shown in Figure 7. Find the line area of the calibration curve 2 and the corresponding P
5.10.2.2.5 Calculate the efficiency and power efficiency by formula (11>, (12>): F#×100%
Where: The efficiency of the laser at a certain input power is
-the material efficiency of the laser, %.
5.10.2.3
a, the reading error of the power meter:||tt| ...2 Test Procedure
GB/T 15175-94
1-Light Source: 2-Optics: 3-Light Used: 1-4-Energy Meter6.1.2.2.1 Test Preparation See 4.3 Record.
6.1.2.2.2 Keep the energy meter and the laser output end at an appropriate distance (as specified in the detailed specification). 6.1.2.2.3 Synchronize the laser pulse to be tested, 6.1.2.2, 4. Select the appropriate energy meter according to the energy output of the laser, pulse length, beam size, etc. 5.1.2.2.5 Align the energy meter head with the output micro beam so that it is fully received. 6.1.2.2.7 Under the specified conditions of the micro-optical device, the energy meter shall be calibrated before each measurement for the same input energy. 6.1.2.2.8 According to the measured value of each measurement, the output energy shall be calculated according to the formula (131): 1.1a or 1.2a: Q
The output energy of the micro-optical device is the output energy of the first measurement, J
The transmittance of the attenuation film, %: The total number of channels selected for the same input energy or measurement. For the measurement, the selection of the optical isolation shall be in accordance with the standard pulse gain repetition rate and the response rate of the meter. Its function is determined by the meter. 6-1.2.3 Main error sources: compensation basis for meter commissioning error control: h. Energy meter reading error ！
The voltage of the excitation source, the inverse error of the electric note: c
The error caused by the attenuation film.
6.1.2.4 Special requirements
In the detailed specifications, the following should be specified:
The accuracy of the energy base meter,
h. The allowable error of the attenuation film,
6.2 Output pulse energy instability
6.2.1 Definition
Under given operating conditions, the pulse output energy of the condenser fluctuates with time within a specified time interval. 6.2.2 Test method
6.2.2.1 Block diagram
The block diagram is shown in the figure.
6.2.2.2 Test procedure
6.2.2.2. 1 The test procedure is shown in 6.1.2.2.16.1.2.2.7. 6.2.2.2.2 Calculate the output energy according to formula (14) minus 15) or (16): -(13)
Where: S.—output energy at constant speed, %S
CB/T 15175-94
W×100%
The maximum relative instability of the output energy is, S.\——-The energy instability standard is deduced,%T.
The effective transmittance ratio;
The total output energy of the measured domain is, W
The output energy of the elastic light disk is, see Wu (112
A pair of the same-input disk, when measuring the output energy, the maximum energy value measured is Ting; W,. For the same input energy single·When measuring, the secondary auxiliary energy, the minimum energy value measured is +I , 6.2.2.3 Main sources of error
For the main sources of error, see 6.1.2.3, 6.2.2.4 Special requirements
For special requirements, see 6.1.2.4.
6.3 Peak half-average power
6.3.1
(16)
Under certain working conditions, the ratio of the base of a single pulse output by the laser to the half-average width of the pulse is called the sample average power of the pulse laser.
6.3.2 Test method
6.3.2.1 Square root diagram
The square root diagram is shown in Figure 9.
Optical beam 12--Beam splitter 14.5mm-thickness plate: ... 6.3.2-2.5 Select the appropriate amplifier so that the meter and the photoelectric detection work area are in the linear region. 6.3.2.2.6 Make the light gate synchronized with the measured laser pulse. When the light gate is opened, make sure that the meter reading is stable and a complete laser beam pattern can be displayed on the oscilloscope. Record the time width between the peak points of the pulse. Each time the energy is repeated, under the condition of the minimum energy shortage, the group (10). 6.3.2-2-7 According to formula 17, the power of the ball is calculated, r..-1.1.15yWu
武, one-single night bee value violation, w:
commercial end transmission, %!
FF-beam group transmittance, %;
Wn-the energy range value obtained for the first time.J
the time interval between the single pulse half-value points obtained for the first time.-
"The total number of measurements under the input energy standard. 6-3.2.3 Main error sources
Energy measurement test error:
Energy meter reading error:
Display of the time width error:
Error caused by the insertion of the piece and the risk of the analysis The error of the micro-vibration source voltage is caused by the limited speed of the detector and the limited bandwidth of the oscilloscope. The non-linear error of the detector shall be specified in the detailed specifications: the accuracy of the optical energy meter; the allowable error of the optical beam splitter and the attenuation transmittance ratio; and the requirements for the optical detector and oscilloscope. 6.4 Pulse output power 6.4.1 Conditions The repetitive pulse detector is operated under certain conditions. The power of each pulse within a certain period of time must be averaged. 6.4.2 Test method 6-4.2.1 The method is shown in Figure 1. 6.4.2.2 Test procedure See Section 5 for the test procedure. 1.2.2.1 ~ 5, 1.2.2.4. 6.4.2.3 No significant error source
, the commercial ball washing rate timing is often short and causes errors; b. Other possible error sources 5. :. 2.3, 6.4.2.4 Special requirements
should be based on the laser pulse recalculation rate, and a micro-sink power meter with a large time constant should be used for measurement: H.2 Calculate the output energy blanket standard according to formula (14) minus 15) or (16): -(13)
Wherein: S.—output energy at a constant speed, %S
CB/T 15175-94
W×100%
the maximum relative instability of the output energy, S.\——-cotton output energy instability standard difference, %T.
effective output transmittance;
chemical…—first! For a pair of the same "input energy", the total output energy of the measured domain is W
, see Wu (112
For a pair of the same-input energy, when measuring the output energy, the maximum energy value measured is W. For a pair of the same-input energy, when measuring the auxiliary energy, the minimum energy value measured is +I, 6.2.2.3 Main sources of error
For the main sources of error, see 6.1.2.3, 6.2.2.4 Special requirements
For special requirements, see 6.1.2.4.|| tt||6.3 Pulse peak half-average power
6.3.1
(16)
Under certain working conditions, the ratio of the base of a single pulse output by the laser to the half-average width of the pulse is called the sample average power of the pulse laser.
6.3.2 Test method
6.3.2.1 Square root diagram
The square root diagram is shown in Figure 9.
Light source 12-Light source: 3-Beam splitter 14.5Millimeter:-Speed beam detector 7-Fast beam detector: 6-Instrument, 5 optical micro-electrode 6. 3. 2. 2 Test Procedure
6.3.2.2.1 Test preparation as in 4.3.
6.3.2.2.2 Align the meter head and the photodetector head with the laser beam. 6-3-2.2.3 Operate the oscilloscope under the operating conditions specified by the detailed specification. 10
G8/R15175-94
6.3.2.2.4 Test the meter, photodetector and oscilloscope in the working state to be tested, including the wave response of the oscilloscope and the warping of the laser beam. The pulse length and the bandwidth of the detector should be matched with the laser pulse width. 6.3.2-2.5 Select the appropriate amplifier so that the meter can work in the linear region with the photoelectric detection. 6.3.2.2.6 Make the light gate synchronized with the laser pulse to be measured. When the light gate is opened, verify the meter reading. When the time is right, a stable light pattern can be displayed on the oscilloscope. Record the time width between the peak points of the pulse. At each certain time, under the condition of a certain minimum energy shortage, the group (10). 6.3.2-2-7 According to formula 17 =Power of the ball in the flat channel, r..-1.1.15yWu
武, one-single night bee value violation, w:
common end transmission, %!
FF-beam group transmittance, %;
Wn-the energy range value obtained for the first time. J
the time interval between the single pulse semi-transmission points obtained for the first time.-
"The total number of measurements under the input energy model. 6-3.2.3 Main error sources
energy meter test error:
energy meter reading efficiency Error:
Error caused by the insertion of the film and the splitter, the error caused by the micro-vibration source, the error caused by the detector speed and the oscilloscope width, the non-self-error of the detector,
6.3-2.4 The specific requirements should be specified in the detailed specifications:
Accuracy of the optical energy meter;
Allowable error of the optical beam splitter and the attenuation ratio of the transmittance.
Requirements for the optical detector and oscilloscope. 6.4 Pulse output
6.4.1 Specification
When a repetitive pulse device is operated under certain conditions, the power of each beat within a certain time range must be averaged. 6.4.2 Test method
6-4.2.1 The figure
is shown in Figure 1,
6.4.2.2 Test procedure
The test procedure is shown in 5.1.2.2.1 ~ 5, 1.2.2.4. 6.4.2.3 Unnecessary error sources
, the error caused by the short time constant of the commercial ball washing rate timing; b. Other error sources are 5.2.3, 6.4.2.4 Special requirements
According to the recalculation rate of the laser, a micro-sink power meter with a large time constant should be used for measurement: H.2 Calculate the output energy blanket standard according to formula (14) minus 15) or (16): -(13)
Wherein: S.—output energy at a constant speed, %S
CB/T 15175-94
W×100%
the maximum relative instability of the output energy, S.\——-cotton output energy instability standard difference, %T.
effective output transmittance;
chemical…—first! For a pair of the same "input energy", the total output energy of the measured domain is W
, see Wu (112
For a pair of the same-input energy, when measuring the output energy, the maximum energy value measured is W. For a pair of the same-input energy, when measuring the auxiliary energy, the minimum energy value measured is +I, 6.2.2.3 Main sources of error
For the main sources of error, see 6.1.2.3, 6.2.2.4 Special requirements
For special requirements, see 6.1.2.4.|| tt||6.3 Pulse peak half-average power
6.3.1
(16)
Under certain working conditions, the ratio of the base of a single pulse output by the laser to the half-average width of the pulse is called the sample average power of the pulse laser.
6.3.2 Test method
6.3.2.1 Square root diagram
The square root diagram is shown in Figure 9.
Light source 12-Light source: 3-Beam splitter 14.5Millimeter:-Speed beam detector 7-Fast beam detector: 6-Instrument, 5 optical micro-electrode 6. 3. 2. 2 Test Procedure
6.3.2.2.1 Test preparation as in 4.3.
6.3.2.2.2 Align the meter head and the photodetector head with the laser beam. 6-3-2.2.3 Operate the oscilloscope under the operating conditions specified by the detailed specification. 10
G8/R15175-94
6.3.2.2.4 Test the meter, photodetector and oscilloscope in the working state to be tested, including the wave response of the oscilloscope and the warping of the laser beam. The pulse length and the bandwidth of the detector should be matched with the laser pulse width. 6.3.2-2.5 Select the appropriate amplifier so that the meter can work in the linear region with the photoelectric detection. 6.3.2.2.6 Make the light gate synchronized with the laser pulse to be measured. When the light gate is opened, verify the meter reading. When the time is right, a stable light pattern can be displayed on the oscilloscope. Record the time width between the peak points of the pulse. At each certain time, under the condition of a certain minimum energy shortage, the group (10). 6.3.2-2-7 According to formula 17 =Power of the ball in the flat channel, r..-1.1.15yWu
武, one-single night bee value violation, w:
common end transmission, %!
FF-beam group transmittance, %;
Wn-the energy range value obtained for the first time. J
the time interval between the single pulse semi-transmission points obtained for the first time.-
"The total number of measurements under the input energy model. 6-3.2.3 Main error sources
energy meter test error:
energy meter reading efficiency Error:
Error caused by the insertion of the film and the splitter, the error caused by the micro-vibration source, the error caused by the detector speed and the oscilloscope width, the non-self-error of the detector,
6.3-2.4 The specific requirements should be specified in the detailed specifications:
Accuracy of the optical energy meter;
Allowable error of the optical beam splitter and the attenuation ratio of the transmittance.
Requirements for the optical detector and oscilloscope. 6.4 Pulse output
6.4.1 Specification
When a repetitive pulse device is operated under certain conditions, the power of each beat within a certain time range must be averaged. 6.4.2 Test method
6-4.2.1 The figure
is shown in Figure 1,
6.4.2.2 Test procedure
The test procedure is shown in 5.1.2.2.1 ~ 5, 1.2.2.4. 6.4.2.3 Unnecessary error sources
, the error caused by the short time constant of the commercial ball washing rate timing; b. Other error sources are 5.2.3, 6.4.2.4 Special requirements
According to the recalculation rate of the laser, a micro-sink power meter with a large time constant should be used for measurement: H.4 Special requirements
According to the pulse recalculation rate of the laser, a micro-sink power meter with a large time constant should be used for measurement: H.4 Special requirements
According to the pulse recalculation rate of the laser, a micro-sink power meter with a large time constant should be used for measurement: H.
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