CN109974975B - Device for index test of pulse fiber laser - Google Patents
Device for index test of pulse fiber laser Download PDFInfo
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- CN109974975B CN109974975B CN201910261712.1A CN201910261712A CN109974975B CN 109974975 B CN109974975 B CN 109974975B CN 201910261712 A CN201910261712 A CN 201910261712A CN 109974975 B CN109974975 B CN 109974975B
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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Abstract
The embodiment of the invention relates to the technical field of laser performance test, and provides a device for testing indexes of a pulse fiber laser, which comprises the following components: the device comprises a power meter, an optical isolator sleeve, a one-dimensional translation table and a two-dimensional cross sliding table, wherein the optical isolator sleeve is used for placing a pulse fiber laser, the power meter and the optical isolator sleeve are coaxially arranged and used for collecting laser emitted by the pulse fiber laser, the one-dimensional translation table is provided with a plurality of first diaphragms with different apertures, and the two-dimensional cross sliding table is provided with a plurality of second diaphragms with different apertures; the one-dimensional translation stage is used for moving in an inclined direction so as to enable the plurality of first diaphragms to move on a propagation channel of the laser; the two-dimensional translation stage is used for moving in the horizontal direction and the vertical direction so as to enable the plurality of second diaphragms to move on the propagation channel of the laser. The device for testing the indexes of the pulse fiber laser is simple and convenient to operate, does not need operators to have more professional knowledge, avoids artificial reading errors, and also avoids the influence of artificial uncertain factors on the test.
Description
Technical Field
The embodiment of the invention relates to the technical field of laser performance testing, in particular to a device for testing indexes of a pulse fiber laser.
Background
Lasers are operationally divided into continuous lasers and pulsed lasers. The pulse laser is a laser which works once every certain time when the pulse width of a single laser is less than 0.25 second, has larger output power and is suitable for laser marking, cutting, distance measurement and the like.
The pulse fiber laser mainly comprises indexes such as beam diameter, central transmittance and output power, the existing tests of the indexes are limited by personnel factors and test process difficulty, and the test results have the conditions of discreteness, poor repeatability, inaccuracy and the like, so that the product at a client side is easy to break down, and further the customer satisfaction is influenced.
Disclosure of Invention
The embodiment of the invention provides a device for index testing of a pulse fiber laser, which is suitable for production and inspection and is used for solving the problems of discreteness, poor repeatability, inaccuracy and the like of a test result of a traditional device.
The embodiment of the invention provides a device for index testing of a pulse fiber laser, which comprises: the device comprises a power meter, an optical isolator sleeve, a one-dimensional translation table and a two-dimensional cross sliding table, wherein the optical isolator sleeve is used for placing a pulse optical fiber laser, the power meter and the optical isolator sleeve are coaxially arranged and used for collecting laser emitted by the pulse optical fiber laser, the one-dimensional translation table is provided with a plurality of first diaphragms with different apertures, and the two-dimensional cross sliding table is provided with a plurality of second diaphragms with different apertures;
the one-dimensional translation stage is used for moving in an inclined direction so as to enable the first diaphragms to move on the propagation channel of the laser; the two-dimensional translation stage is used for moving in the horizontal direction and the vertical direction so as to enable the second diaphragms to move on the propagation channel of the laser.
The laser power meter is characterized by further comprising a bottom plate and side plates surrounding the bottom plate, the power meter, the optical isolator sleeve, the one-dimensional translation table and the two-dimensional cross sliding table are mounted on the bottom plate, and the side plates are used for isolating laser from the outside.
The one-dimensional translation table comprises a translation table, a first stepping motor and a first lead screw;
the first lead screw is arranged on a first lead screw supporting seat, one end of the first lead screw is connected to the first stepping motor, and the first lead screw supporting seat is arranged on the bottom plate; the translation platform is installed in first lead screw, just translation bench is last to be provided with a plurality ofly first diaphragm.
The axis of the first lead screw supporting seat and the axis of the bottom plate form an acute angle.
The stepping motor comprises a side plate, a first stepping motor driver and a second stepping motor driver, wherein the first stepping motor driver is installed on the side plate and connected with the first stepping motor.
The two-dimensional cross sliding table comprises a sliding table, a second stepping motor, a third stepping motor, a second lead screw and a third lead screw;
the second lead screw is arranged on a second lead screw supporting seat, one end of the second lead screw is connected to the second stepping motor, and the second lead screw supporting seat is arranged on the bottom plate; the third lead screw is installed in the third lead screw supporting seat, just the one end of third lead screw connect in third step motor, the third lead screw supporting seat install in on the second lead screw, the second lead screw with the third lead screw supporting seat is arranged perpendicularly, the slip table install in the third lead screw, just be provided with a plurality ofly on the slip table the second diaphragm.
And the aperture of the second diaphragm is 2-10 mm.
The side plate is provided with a first stepping motor driver and a second stepping motor driver, the first stepping motor driver and the second stepping motor driver are arranged on the side plate, the first stepping motor driver is connected with the first stepping motor, and the second stepping motor driver is connected with the second stepping motor.
The optical fiber laser further comprises a magnet pressing block, and an output optical isolator of the pulse optical fiber laser is fixed to the optical isolator sleeve through the magnet pressing block.
The laser light source device further comprises a data processing module, wherein the data processing module is used for obtaining a first stable power value of the laser light when any one of the first diaphragms and any one of the second diaphragms are not located on the propagation channel of the laser light, a second stable power value of the laser light when the laser light partially passes through one of the first diaphragms, and a third stable power value of the laser light when the laser light completely passes through one of the second diaphragms, and obtaining the beam diameter, the central transmittance and the light power based on the first stable power value, the second stable power value and the third stable power value.
The device for testing the index of the pulse fiber laser, provided by the embodiment of the invention, is used for obtaining a first stable power value of laser when any one of the first diaphragm and the second diaphragm is not positioned on a propagation channel of the laser, a second stable power value of the laser when a laser part passes through one of the first diaphragms and a third stable power value of the laser when the laser completely passes through one of the second diaphragms, and obtaining the diameter of a light beam, the central transmittance and the optical power based on the first stable power value, the second stable power value and the third stable power value. The device for testing the indexes of the pulse fiber laser is simple and convenient to operate, high in automation degree, free of the need of operators to have more professional knowledge, capable of avoiding artificial reading errors and also capable of avoiding the influence of artificial uncertain factors on testing.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a perspective view of an apparatus for index testing of a pulse fiber laser according to the present invention;
FIG. 2 is a top view of the apparatus for index testing of a pulse fiber laser according to the present invention;
fig. 3 is a side view of the apparatus for index testing of a pulse fiber laser according to the present invention.
Description of reference numerals:
1-side plate; 2-a bottom plate; 3-a power meter; 4-an opto-isolator sleeve; 5-pulse fiber laser; 6-one-dimensional translation stage; 7-a two-dimensional cross sliding table; 8-a translation stage; 9-sliding table.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, fig. 2 and fig. 3, an apparatus for testing an index of a pulse fiber laser according to an embodiment of the present invention includes: the power meter comprises a power meter 3, an optical isolator sleeve 4, a one-dimensional translation table 6 and a two-dimensional cross sliding table 7, wherein the optical isolator sleeve 4 is gun-shaped, the optical isolator sleeve 4 is used for placing a pulse optical fiber laser, the power meter 3 and the optical isolator sleeve 4 are coaxially arranged, the power meter 3 is used for collecting laser emitted by the pulse optical fiber laser 5, a plurality of first diaphragms with different apertures are arranged on the one-dimensional translation table 6, and a plurality of second diaphragms with different apertures are arranged on the two-dimensional cross sliding table 7; the apertures of the first diaphragms are different from the apertures of the second diaphragms; the apertures of the first diaphragm and the second diaphragm can be customized according to the test requirements of different types of products, one device is compatible with the test of various pulse lasers, and the cost is saved;
the one-dimensional translation table 6 is used for moving in an inclined direction so as to enable the plurality of first diaphragms to move on a propagation channel of the laser; the two-dimensional cross sliding table 7 is used for moving in the horizontal direction and the vertical direction so as to enable the plurality of second diaphragms to move on the propagation channel of the laser. The two-dimensional cross sliding table 7 can move along X and Y axes and drives the second diaphragm to move, the second diaphragm can realize a 'return' shape, a point-by-point scanning method, an XY maximum point scanning method, a cross method and a hill climbing method, and the specific positions of the points with the maximum value and the minimum value are searched according to the movement track.
In the embodiment of the present invention, a first stable power value of the laser light when any of the first diaphragm and the second diaphragm is not located in the propagation path of the laser light, a second stable power value of the laser light when the laser light partially passes through one of the first diaphragms, and a third stable power value of the laser light when the laser light completely passes through one of the second diaphragms are obtained, and the beam diameter, the central transmittance, and the optical power are obtained based on the first stable power value, the second stable power value, and the third stable power value. The device for testing the indexes of the pulse fiber laser is simple and convenient to operate, high in automation degree, free of the need of operators to have more professional knowledge, capable of avoiding artificial reading errors and also capable of avoiding the influence of artificial uncertain factors on testing.
On the basis of the above-mentioned embodiment, this a device for test of pulse fiber laser index still includes bottom plate 2 and encloses curb plate 1 that locates the bottom plate all around, and power meter 3, optoisolator sleeve 4, one-dimensional translation platform 6 and two-dimentional cross slip table 7 are all installed on bottom plate 2 through M6 screw, concentrate a plurality of parts overall arrangement on a bottom plate, reduce occupy-place and numerous and diverse wiring, and curb plate 1 is used for keeping apart laser and external world.
In the embodiment of the invention, the size of the outer diameter of the output light isolator of the pulse fiber laser is consistent with the size of the inner diameter of the sleeve of the gun-shaped optical isolator during installation, so that the concentricity is ensured; performing concentricity calibration on a first diaphragm and a gun-shaped optical isolator sleeve on the one-dimensional translation table by using a concentric limiting cylinder, and ensuring that the concentricity of two holes is less than 0.01 mm; the gun-shaped optical isolator sleeve can be made of aluminum; the side plate 1 can use a sheet metal structure, plays a role in isolating and scattering laser, and enables an operator to be safer in the inspection process.
On the basis of the above embodiment, the one-dimensional translation stage 6 includes a translation stage 8, a first stepping motor, and a first lead screw;
two ends of the first lead screw are both mounted on a first lead screw supporting seat through bearings, one end of the first lead screw is connected to an output shaft of the first stepping motor through a coupler, and the first lead screw supporting seat is mounted on the bottom plate 2 through an M6 screw; translation platform 8 is installed in first lead screw, and is provided with a plurality of first diaphragms on translation platform 8.
In the embodiment of the invention, the first lead screw is driven to rotate by the operation of the first stepping motor, so as to drive the translation stage 8 to move, and the movement direction of the first diaphragm is perpendicular to the path of the propagation channel of the laser.
On the basis of the above embodiment, the axis of the first screw support seat and the axis of the bottom plate 2 form an acute angle.
In the embodiment of the present invention, in order to avoid the direct collision of the translation stage 8 with the gun-shaped optical isolator sleeve, the axis of the first screw rod support seat and the axis of the bottom plate 2 form an angle θ, that is, the first screw rod support seat is arranged obliquely, and the angle θ may be 8 °, 15 °, 30 ° or 45 °. The bottom plate 2 can be a rectangular bottom plate, the first lead screw supporting seat can be a rectangular first lead screw supporting seat, the axial direction of the bottom plate 2 is along the length direction of the bottom plate, and the axial direction of the first lead screw supporting seat is along the length direction of the bottom plate.
On the basis of the above embodiment, the one-dimensional translation stage 6 further includes a first stepping motor driver installed on the side plate 1, and the first stepping motor driver is connected with the first stepping motor.
In the embodiment of the invention, the first stepping motor driver is used for amplifying the motion control signal and driving the first stepping motor, and 256 levels of subdivision can be carried out, so that the control precision is improved. The first stepping motor can be a 2-phase 4-wire stepping motor with a 1.8-degree stepping angle, and has the characteristics of simple structure and long service life.
On the basis of the embodiment, the two-dimensional cross sliding table comprises a sliding table 9, a second stepping motor, a third stepping motor, a second screw rod and a third screw rod;
two ends of a second lead screw are both mounted on a second lead screw supporting seat through bearings, one end of the second lead screw is connected to an output shaft of a second stepping motor through a coupler, and the second lead screw supporting seat is mounted on the bottom plate 2 through an M6 screw;
the both ends of third lead screw all are installed in third lead screw supporting seat through the bearing, and the output shaft of coupling joint in third step motor is passed through to the one end of third lead screw, and the one end fixed mounting of third lead screw supporting seat is on the second lead screw, and second lead screw and third lead screw supporting seat are arranged perpendicularly, and slip table 9 is installed in the third lead screw, and is provided with a plurality of second diaphragms on the slip table 9.
In the embodiment of the invention, the second screw rod is driven to rotate by the operation of the second stepping motor, so that the third screw rod supporting seat is driven to move in the X-axis direction, the third screw rod is driven to rotate by the operation of the third stepping motor, so that the sliding table 9 is driven to move in the Y-axis direction, and the movement direction of the second diaphragm is perpendicular to the path of the laser propagation channel.
In addition to the above embodiments, the aperture of the second diaphragm is 2-10 mm.
In the embodiment of the invention, the aperture of the second diaphragm can be 2.5mm and 7mm, and different apertures can be set, so that the diaphragm can be used for product tests of different models.
On the basis of the above embodiment, the side plate device further comprises a second stepping motor driver and a third stepping motor driver which are installed on the side plate 1, wherein the second stepping motor driver is connected with the second stepping motor, and the third stepping motor driver is connected with the third stepping motor.
In the embodiment of the invention, the second stepping motor driver is used for amplifying the motion control signal and driving the second stepping motor, and 256 levels of subdivision can be carried out, so that the control precision is improved; the third step motor driver is used for amplifying the motion control signal and driving the third step motor, 256 levels of subdivision can be carried out, and the control precision is improved. The second stepping motor and the third stepping motor can be 2-phase 4-wire stepping motors with 1.8-degree stepping angles, and have the characteristics of simple structure and long service life.
On the basis of the above embodiment, the pulse fiber laser further comprises a magnet press block, and the output optical isolator of the pulse fiber laser 5 is fixed to the optical isolator sleeve 4 through the magnet press block.
In the embodiment of the invention, the output optical isolator of the pulse fiber laser 5 is fixed on the optical isolator sleeve 4 through the magnet pressing block, so that the two are quickly assembled and separated, and the installation efficiency is effectively improved.
On the basis of the above embodiment, the apparatus for testing the index of the pulse optical fiber laser further includes a data processing module, the data processing module is configured to obtain a first stable power value of the laser when any one of the first diaphragms and any one of the second diaphragms are not located in a propagation channel of the laser, a second stable power value of the laser when the laser partially passes through one of the first diaphragms, and a third stable power value of the laser when the laser completely passes through one of the second diaphragms, and obtain a beam diameter, a central transmittance, and an optical power based on the first stable power value, the second stable power value, and the third stable power value.
In the embodiment of the invention, an output optical isolator of a pulse optical fiber laser is placed on a gun-shaped optical isolator sleeve, then a magnet pressing block is pressed to enable the output optical isolator to be tightly attached to the gun-shaped optical isolator sleeve, an industrial personal computer is connected with a computer, the industrial personal computer controls a driving power supply to start working, the driving power supply is used for supplying 24V direct current to the pulse laser, the industrial personal computer is also used for controlling the light emitting condition of the pulse laser, the industrial personal computer respectively controls the motion of a one-dimensional translation table and a two-dimensional cross sliding table through a motion control card, the motion control card is used for generating motion control signals of three stepping motors, and the three stepping motors are used for amplifying the corresponding motion control signals and further driving; the power data collected by the power meter is uploaded to an industrial personal computer through a serial port for analysis;
the device for testing the indexes of the pulse fiber laser further comprises a control panel, wherein the control panel is used for responding to key signals, controlling I/O signals such as corresponding indicator lamps and unit power supply and uploading the key signals; detecting power supply voltage and current and uploading the power supply voltage and current to a computer; responding to serial port control and query signals of the industrial personal computer; the CAN bus signal is converted into a serial port signal, and the serial port signal is converted into a CAN bus signal.
Firstly, selecting automatic test, starting to detect the current and the voltage of the pulse fiber laser, and then moving the two-dimensional cross sliding table and the one-dimensional translation table away without blocking the light emitted by the pulse fiber laser, wherein the test power is P1; then moving the one-dimensional translation table to a concentric position of a gun-shaped optical isolator sleeve, enabling the laser part to pass through one of the first diaphragms, testing the power to be P2 after stabilization, and then returning the one-dimensional translation table; and finally, moving the two-dimensional cross sliding table, selecting a second diaphragm with a corresponding diameter, enabling the laser to completely pass through the second diaphragm, and stabilizing to obtain a test power P3.
And judging whether the reading value of the power meter is stable or not by adopting a slope coefficient judging mode.
The specific method comprises the following steps: assuming that the power value of the power meter reading N points is a certain discrete array a [ N ] (N is a positive integer greater than zero), the slope k [ i ] represents the slope of the ith point, and k [ i ] is calculated by (a [ i +1] -a [ i ])/a [ i ]. Two arrays a [ n ] and k [ n-1] are finally obtained, and if there are consecutive m values in the array of k [ n-1], which satisfy abs (k [ j ]) < Value (the Value of Value is configurable, for example, between 0.01 and 0.005), it indicates that there are consecutive m points in steady state. Then, the average power Sum (aj, aj +1, aj + m-1)/m of the continuous m points is taken as the current effective power value.
In the actual detection process, if the power value curve is found to be slightly reduced after the curve approaches the stable value for a period of time (about 5 seconds), some other criterion algorithms are added in order to capture the slightly reduced power value. The specific method is to abandon the front m points of the array a [ n ] (the value of m takes different values according to different types of equipment), then compare with the slope, and take the average value to obtain the slightly reduced power value.
And a data processing module in the industrial personal computer calculates to obtain the beam diameter, the central transmittance and the optical power index based on the first stable power value, the second stable power value and the third stable power value. Moreover, the beam diameter, the central transmittance and the optical power are respectively compared with corresponding indexes of a set product, for example, if the central transmittance is smaller than a preset threshold value, the product is judged to be unqualified, an alarm signal can appear on a warning lamp arranged on the side plate, and meanwhile, the product is prompted to be unqualified by voice; after the test is finished, the two-dimensional cross sliding table is moved away, the industrial personal computer controls the driving power supply to power off the pulse laser, and a test report is automatically generated.
The device for testing the indexes of the pulse fiber laser reduces the operation of personnel participating in the power-on process, and greatly improves the safety of the test; the equipment judges each piece of test data, and automatically gives an audible and visual alarm to prevent misjudgment; the maximum power point is automatically found out, and the testing efficiency is greatly improved.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (9)
1. An apparatus for index testing of a pulsed fiber laser, comprising: the device comprises a power meter, an optical isolator sleeve, a one-dimensional translation table and a two-dimensional cross sliding table, wherein the optical isolator sleeve is used for placing a pulse optical fiber laser, and the power meter and the optical isolator sleeve are coaxially arranged and used for collecting laser emitted by the pulse optical fiber laser;
the one-dimensional translation stage is used for moving in an inclined direction so as to enable the first diaphragms to move on the propagation channel of the laser; the two-dimensional cross sliding table is used for moving in the horizontal direction and the vertical direction so as to enable the second diaphragms to move on the propagation channel of the laser;
the laser light source device further comprises a data processing module, wherein the data processing module is used for obtaining a first stable power value of the laser light when any one of the first diaphragms and any one of the second diaphragms are not located on the propagation channel of the laser light, a second stable power value of the laser light when the laser light partially passes through one of the first diaphragms and a third stable power value of the laser light when the laser light completely passes through one of the second diaphragms, and obtaining the beam diameter, the central transmittance and the light power based on the first stable power value, the second stable power value and the third stable power value.
2. The device for testing the index of the pulse fiber laser according to claim 1, further comprising a bottom plate and side plates surrounding the bottom plate, wherein the power meter, the optical isolator sleeve, the one-dimensional translation table and the two-dimensional cross sliding table are all mounted on the bottom plate, and the side plates are used for isolating the laser from the outside.
3. The device for index testing of the pulsed fiber laser according to claim 2, wherein the one-dimensional translation stage comprises a translation stage, a first stepping motor and a first lead screw;
the first lead screw is arranged on a first lead screw supporting seat, one end of the first lead screw is connected to the first stepping motor, and the first lead screw supporting seat is arranged on the bottom plate; the translation platform is installed in first lead screw, just translation bench is last to be provided with a plurality ofly first diaphragm.
4. The apparatus for index testing of the pulsed fiber laser according to claim 3, wherein the axis of the first screw support seat and the axis of the bottom plate form an acute angle.
5. The apparatus for index testing of the pulsed fiber laser according to claim 3, further comprising a first stepping motor driver installed on the side plate, wherein the first stepping motor driver is connected with the first stepping motor.
6. The device for index testing of the pulse fiber laser device according to claim 2, wherein the two-dimensional cross sliding table comprises a sliding table, a second stepping motor, a third stepping motor, a second lead screw and a third lead screw;
the second lead screw is arranged on a second lead screw supporting seat, one end of the second lead screw is connected to the second stepping motor, and the second lead screw supporting seat is arranged on the bottom plate; the third lead screw is installed in the third lead screw supporting seat, just the one end of third lead screw connect in third step motor, the third lead screw supporting seat install in on the second lead screw, the second lead screw with the third lead screw supporting seat is arranged perpendicularly, the slip table install in the third lead screw, just be provided with a plurality ofly on the slip table the second diaphragm.
7. The device for the index test of the pulse fiber laser as claimed in claim 6, wherein the aperture of the second diaphragm is 2-10 mm.
8. The apparatus for index testing of the pulse fiber laser according to claim 6, further comprising a second stepping motor driver and a third stepping motor driver mounted on the side plate, wherein the second stepping motor driver is connected with the second stepping motor, and the third stepping motor driver is connected with the third stepping motor.
9. The apparatus for index testing of the pulsed fiber laser according to claim 1, further comprising a magnet press block, wherein an output optical isolator of the pulsed fiber laser is fixed to the optical isolator sleeve through the magnet press block.
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| CN112683491A (en) * | 2020-11-18 | 2021-04-20 | 武汉锐科光纤激光技术股份有限公司 | Automatic test system of continuous fiber laser |
| CN116625643A (en) * | 2023-05-26 | 2023-08-22 | 长沙航空职业技术学院(空军航空维修技术学院) | High-power pump source testing equipment and testing method |
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| CN102494639B (en) * | 2011-10-18 | 2013-11-13 | 北京理工大学 | Laser divergence angle measuring device and measuring method based on full-automatic hole alignment method |
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