CN105092216A - Laser diode area array pumped uniformity detection apparatus - Google Patents
Laser diode area array pumped uniformity detection apparatus Download PDFInfo
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- CN105092216A CN105092216A CN201510544211.6A CN201510544211A CN105092216A CN 105092216 A CN105092216 A CN 105092216A CN 201510544211 A CN201510544211 A CN 201510544211A CN 105092216 A CN105092216 A CN 105092216A
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- laser diode
- optical waveguide
- planar array
- reflector
- continuous laser
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Abstract
The embodiment of the invention discloses a laser diode area array pumped uniformity detection apparatus. The apparatus comprises a laser diode area array; an optical waveguide for performing uniformization on pumped light emitted by the laser diode area array; a V-shaped reflector panel for reflecting the pumped light emitted by the optical waveguide towards the two sides of the optical waveguide; a laser transmission fiber including a fiber joint and a fiber tail end, wherein the fiber joint is fixed on the V-shaped reflector plate for receiving the pumped light emitted by the optical waveguide; a driver for driving the V-shaped reflector panel to move relative to the light-emitting surface of the optical waveguide according to a predetermined mode; a power meter probe disposed at the backlight side of the V-shaped reflector plate for detecting the optical power value of light emitted by the fiber tail end; and a processor for receiving the optical power value and analyzing the optical power value according to the predetermined mode so as to obtain uniformity distribution. According to the embodiment of the invention, quantification processing can be performed on the uniformity distribution of a certain light receiving area, and the laser diode area array pumped uniformity detection apparatus has the advantage of quite high detection accuracy.
Description
Technical field
The present invention relates to laser technology field, particularly relate to a kind of continuous laser diode planar array pumping homogeneity pick-up unit.
Background technology
Because having, the advantage such as thermal effect is little, good stability, compact conformation is applied widely the solid state laser of semiconductor pump.Enter people's eighties in 20th century, along with the development of semiconductor laser technique, the performance of single laser diode is greatly improved, especially the developing rapidly of semi-conductor array, makes solid state laser present vitality.
No matter be for traditional pole shape laser working medium, or for the laser working medium of lath-shaped, want the Laser output obtaining high-power high light beam quality, a high-power high performance pumping source has just become ideal pumping structure, and semiconductor array just meets our demand.Moreover, go for the Laser output of high light beam quality, we not only will overcome thermograde, thermal lens, stress moves back the thermal effect such as sheet, also must consider to allow pump light enter actuating medium more uniformly, but whether even pump light is, be need us to go inspection further.
In the prior art, detection is carried out to the homogeneity of pump light and is mostly and observes qualitatively, for example fluorescence distribution detection is carried out to sensitive surface, observe hot spot; Or utilize software to carry out ray Tracing Simulation of Volume Scattering, all inevitably there is the lower problem of testing result accuracy in these detection methods.
Summary of the invention
The technical matters that the present invention mainly solves is to provide a kind of novel device detected pump light homogeneity, and is a kind of continuous laser diode planar array pumping homogeneity pick-up unit of the feature with testing result high accuracy.
The embodiment of the present invention provides a kind of continuous laser diode planar array pumping homogeneity pick-up unit, comprising: continuous laser diode planar array; Optical waveguide, for carrying out homogenising to the pump light of continuous laser diode planar array outgoing; V-arrangement reflector, for reflecting away the both sides of the pump light of this optical waveguide outgoing to this optical waveguide; Laser transmission fiber, comprises fibre-optical splice and optical fiber connector, and fibre-optical splice is fixed on V-arrangement reflector, for receiving the pump light of optical waveguide outgoing; Driver, for driving V-arrangement reflector to move according to the exiting surface of predetermined way relative to optical waveguide, so that fibre-optical splice receives the light in the precalculated position of the exiting surface of optical waveguide according to predetermined way; Power meter is popped one's head in, and is positioned at the backlight side of V-arrangement reflector, for the luminous power numerical value of detection optical fiber end emergent light; Processor, for received optical power numerical value, and analyzes to obtain homogeneity to this luminous power numerical value according to predetermined way.
Wherein, V-arrangement reflector comprises the two pieces of reflectors forming V-arrangement, and these two pieces of reflectors are about the first plane symmetry, and the first plane is the plane perpendicular to optical waveguide exiting surface.
Wherein, fibre-optical splice is fixed on the center position of two pieces of reflector closures.
Wherein, V-arrangement reflector has a light hole, fibre-optical splice is embedded in this light hole.
Wherein, the surface of meeting to optical waveguide exiting surface of V-arrangement reflector is coated with silver.
Wherein, this device also comprises two pieces of light receiving plates, is arranged at the both sides of optical waveguide respectively, for receiving the pump light of V-arrangement reflector reflection.
Wherein, driver moves relative to the exiting surface of optical waveguide line by line point by point for driving V-arrangement reflector, make fibre-optical splice line by line pointwise receive the light in precalculated position of the exiting surface of optical waveguide.
Wherein, for the light in each precalculated position of the exiting surface of optical waveguide, processor obtains some luminous power numerical value, and using the mean value of these several luminous power numerical value as the luminous power numerical value in each precalculated position.
Compared with prior art, the embodiment of the present invention comprises following beneficial effect:
A kind of continuous laser diode planar array pumping homogeneity pick-up unit of the embodiment of the present invention, optical waveguide is utilized to carry out homogenising to the pump light of continuous laser diode planar array outgoing, and utilize laser transmission fiber, driver, power meter to pop one's head in and processor on this basis, gather the luminous power numerical value of the pump light in precalculated position on optical waveguide exiting surface, obtain the uniformity profile of the pump light of optical waveguide outgoing; Meanwhile, the present embodiment utilizes V-arrangement reflector to avoid the pump light except collection point to incide power meter probe, ensure that the accuracy of power meter probe detection.Therefore, compared with prior art, the testing result of the present embodiment to pump light homogeneity has higher accuracy.
Accompanying drawing explanation
Fig. 1 is the structural representation of an embodiment of a kind of continuous laser diode planar array pumping homogeneity pick-up unit in the embodiment of the present invention;
Fig. 2 is the structural representation of another embodiment of a kind of continuous laser diode planar array pumping homogeneity pick-up unit in the embodiment of the present invention.
Embodiment
Below in conjunction with drawings and embodiments, the embodiment of the present invention is described in detail.
Embodiment one
Refer to Fig. 1, Fig. 1 is the structural representation of an embodiment of a kind of continuous laser diode planar array pumping homogeneity pick-up unit in the embodiment of the present invention.As shown in Figure 1, continuous laser diode planar array pump light uniformity detection 100 comprises continuous laser diode planar array 110, optical waveguide 120, V-arrangement reflector (comprise reflector 131 with reflector 132), laser transmission fiber (comprising fibre-optical splice 141 and optical fiber connector 142), driver (scheming not shown), power meter pop one's head ins 150 and processor 160.
As shown in Figure 1, the horizontal direction of paper is z direction, and the vertical direction of paper is x direction, and the direction perpendicular to paper is y direction.Particularly, LD (LaserDiode, laser diode) face battle array can be folded battle array by several LD and be arranged in the x-direction and form, and the quick shaft direction of continuous laser diode planar array is y direction, and the slow-axis direction of continuous laser diode planar array is x direction.
What optical waveguide 120 was arranged at continuous laser diode planar array 110 goes out in light path, for carrying out homogenising to the pump light of continuous laser diode planar array 110 outgoing.In the present embodiment, because the quick shaft direction angle of divergence of continuous laser diode planar array 110 is large, the pump light of continuous laser diode planar array 110 outgoing at the upper and lower surface of optical waveguide 120 (being namely parallel to two surfaces of paper) multiple reflections, thus can realize the homogenising of pump light.
In V-arrangement reflector, reflector 131 and reflector 132 form a V-arrangement, can be connected between reflector 131 with reflector 132 by multiple connected modes such as bonding, welding.Fibre-optical splice 141 is fixed on V-arrangement reflector, for receiving the pump light of optical waveguide 120 outgoing.Particularly, can arrange a light hole on V-arrangement reflector, fibre-optical splice 114 is embedded in this light hole.V-arrangement reflector is used for the both sides of the pump light of optical waveguide 120 outgoing to this optical waveguide 120 to reflect away, to avoid the pump light except the pump light except inciding fibre-optical splice 141 place to incide power meter probe 150, and affect power meter and to pop one's head in the detection of 150 pairs of target light.Preferably, the surface of meeting to optical waveguide 120 exiting surface of V-arrangement reflector is coated with silver, to improve reflectivity.
Fibre-optical splice 141 can be fixed on any position of V-arrangement reflector, and in the present embodiment, fibre-optical splice 141 is preferably fixed on the position of reflector 131 and reflector 132 closure.In order to improve the symmetry of product structure, more preferably, reflector 131 and reflector 132 are about the first plane symmetry, and the first plane is the plane perpendicular to optical waveguide 120 exiting surface.Fibre-optical splice is fixed on the center position of reflector 131 and reflector 132 closure.
It is easily understood that in other embodiments, V-arrangement reflector also can be made up of the reflector that a monoblock is V-shaped, as long as the pump light except the pump light except inciding fibre-optical splice 141 place can be avoided to incide power meter probe 150.
Driver (not shown) can be three-dimensional stepper, also can be other driving arrangement.Driver moves according to the exiting surface of predetermined way relative to optical waveguide 120 for driving V-arrangement reflector, so that fibre-optical splice 141 receives the light in the precalculated position of the exiting surface of optical waveguide 120 according to predetermined way.Such as, driver moves relative to the exiting surface of optical waveguide 120 line by line point by point for driving V-arrangement reflector, and the fibre-optical splice 141 making to be fixed on V-arrangement reflector line by line pointwise receives the light in the precalculated position of the exiting surface of optical waveguide 120.Certainly, driver also can drive V-arrangement reflector to move by the exiting surface of other predetermined way relative to optical waveguide 120, such as, V-arrangement reflector does the multiple annular movement increasing gradually or reduce gradually relative to this exiting surface, or do increase gradually or reduce gradually helical, or the S type done line by line or by column moves etc.
Optical fiber connector 142 and the power meter of laser transmission fiber are popped one's head in and 150 to be connected, and power meter probe 150 is positioned at the backlight side of V-arrangement reflector, for the luminous power numerical value of detection optical fiber end 142 emergent light.In the present embodiment, power meter probe 150 does not move with V-arrangement reflector, but fixed.Certainly, in other embodiments, driver also can pop one's head in 150 by driving power meter, makes power meter probe 150 follow V-arrangement reflector synchronizing moving.
The luminous power numerical value that processor 160 sends for received power meter probe 150, and according to predetermined way, this luminous power numerical value is analyzed to the homogeneity of the pump light obtaining optical waveguide outgoing.Processor 160 is specifically as follows computing machine, and power meter probe 150 can pass through the transmitting optical power numerical value such as USB (UniversalSerialBus, USB (universal serial bus)) or wireless network to computing machine.
Preferably, for the light in each precalculated position of the exiting surface of optical waveguide 120, processor 160 obtains some luminous power numerical value, and using the mean value of these several luminous power numerical value as the luminous power numerical value in each precalculated position, to improve the accuracy of detection.Such as, when pointwise receives the light of the exiting surface of optical waveguide 120 to fibre-optical splice 141 line by line, processor 160, each of fibre-optical splice 141 scan light waveguide 120 exiting surface time, all obtains 500 luminous power numerical value, and using these 500 luminous power numerical value as the luminous power numerical value of current scan point.
For ease of understanding, the following describes an a kind of embody rule of continuous laser diode planar array pumping homogeneity pick-up unit 100:
The three-dimensional of optical waveguide 120 is defined as: long 100mm, y direction, the x direction long 80mm in long 30mm, z direction.Reflector 131 is 220mm × 120mm with the size of reflector 132, and this two reflector is about yz plane symmetry, and between two reflectors, angle is 80 ° of angles.
Driver is three-dimensional stepper, mobile from the upper left corner of optical waveguide 120 exiting surface by programmed control V-arrangement reflector, make fibre-optical splice 141 mobile from the upper left corner of optical waveguide 120 exiting surface, the luminous power numerical value that simultaneous computer 160 recording power meter probe 150 sends.Fibre-optical splice 141 often moves 1mm in the direction of the x axis, and computing machine 160 gathers the data of a point.For each point, computing machine 160 gathers 100 data, using the mean value of these 100 data as the luminous power numerical value of this point.The long 100mm in x direction of optical waveguide 120, therefore the data that a line gathers 100 points are altogether scanned, collection terminates rear fibre-optical splice 141 and moves down 1mm continuation scanning along y-axis, until the data of the every a line in y-axis direction all gather complete, amounts to the data of 100 × 30=3000 point.Last computing machine 160 to the data of these 3000 points, simulate in optical waveguide 120 exiting surface (i.e. xy plane) the distribution curve of luminous power numerical value a little, i.e. the uniformity profile of the pump light of optical waveguide 120 outgoing.
As can be seen here, a kind of continuous laser diode planar array pumping homogeneity pick-up unit of the present embodiment, optical waveguide is utilized to carry out homogenising to the pump light of continuous laser diode planar array outgoing, and utilize laser transmission fiber, driver, power meter to pop one's head in and processor on this basis, gather the luminous power numerical value of the pump light in precalculated position on optical waveguide exiting surface, obtain the uniformity profile of the pump light of optical waveguide outgoing; Meanwhile, the present embodiment utilizes V-arrangement reflector to avoid the pump light except collection point to incide power meter probe, ensure that the accuracy of power meter probe detection.Therefore, compared with prior art, the testing result of the present embodiment to pump light homogeneity has higher accuracy.
Embodiment two
Refer to Fig. 2, Fig. 2 is the structural representation of another embodiment of a kind of continuous laser diode planar array pumping homogeneity pick-up unit in the embodiment of the present invention.As shown in Figure 2, a kind of continuous laser diode planar array pumping homogeneity pick-up unit 200 comprises continuous laser diode planar array 210, optical waveguide 220, V-arrangement reflector (comprise reflector 231 with reflector 232), laser transmission fiber (comprising fibre-optical splice 241 and optical fiber connector 242), driver (scheming not shown), power meter pop one's head ins 250 and processor 260.
The present embodiment and embodiment one difference comprise:
1, a kind of continuous laser diode planar array pumping homogeneity pick-up unit 200 also comprises water cooling unit 210, for carrying out radiating treatment to continuous laser diode planar array 210, is particularly useful for powerful continuous laser diode planar array.
2, a kind of continuous laser diode planar array pumping homogeneity pick-up unit 200 also comprises two pieces of light receiving plates 281 and 282, is arranged at the both sides of optical waveguide 220 respectively.What light receiving plate 281 was positioned at reflector 231 goes out in light path, for receiving the pump light that reflector 231 reflects; What light receiving plate 282 was positioned at reflector 232 goes out in light path, for receiving the pump light that reflector 232 reflects.When continuous laser diode planar array 210 is high-power light-emitting source, the light that V-arrangement reflector reflects away easily damages people, therefore, can arrange light receiving plate 281 and 282, to avoid this injury problem.Because light receiving plate 281 and 282 absorbs a large amount of heat, therefore radiating treatment can also be done to light receiving plate.
Relative to embodiment one, the present embodiment not only has the advantage of embodiment one, and receive the pump light of V-arrangement reflector reflection in the present embodiment owing to being provided with light receiving plate, the high-power light that V-arrangement reflector can be avoided to reflect away damages people, has the advantage that security is higher.
The foregoing is only embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every utilize instructions of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (9)
1. a continuous laser diode planar array pumping homogeneity pick-up unit, is characterized in that, comprising:
Continuous laser diode planar array;
Optical waveguide, for carrying out Homogenization Treatments to the pump light of described continuous laser diode planar array outgoing;
V-arrangement reflector, for reflecting away the both sides of the pump light of this optical waveguide outgoing to this optical waveguide;
Laser transmission fiber, comprises fibre-optical splice and optical fiber connector, and described fibre-optical splice is fixed on described V-arrangement reflector, for receiving the pump light of described optical waveguide outgoing;
Driver, for driving described V-arrangement reflector to move according to the exiting surface of predetermined way relative to described optical waveguide, so that described fibre-optical splice receives the light in the precalculated position of the exiting surface of described optical waveguide according to predetermined way;
Power meter is popped one's head in, and is positioned at the backlight side of described V-arrangement reflector, for detecting the luminous power numerical value of described optical fiber connector emergent light;
Processor, for receiving described luminous power numerical value, and analyzes to obtain described homogeneity to this luminous power numerical value according to predetermined way.
2. a kind of continuous laser diode planar array pumping homogeneity pick-up unit according to claim 1, is characterized in that, described continuous laser diode planar array, for launching pump light, can be laser diode if desired and folds battle array.
3. a kind of continuous laser diode planar array pumping homogeneity pick-up unit according to claim 1, it is characterized in that, described V-arrangement reflector comprises the two pieces of reflectors forming V-arrangement, and these two pieces of reflectors are about the first plane symmetry, and the first plane is the plane perpendicular to described optical waveguide exiting surface.
4. a kind of continuous laser diode planar array pumping homogeneity pick-up unit according to claim 3, it is characterized in that, described fibre-optical splice is fixed on the center position of described two pieces of reflector closures, if desired, can be fixed on the optional position of two pieces of reflector closures.
5. a kind of continuous laser diode planar array pumping homogeneity pick-up unit according to claim 1, it is characterized in that, described V-arrangement reflector has a light hole, and described fibre-optical splice is embedded in this light hole.
6. a kind of continuous laser diode planar array pumping homogeneity pick-up unit according to claim 1, is characterized in that, the surface of meeting to described optical waveguide exiting surface of described V-arrangement reflector is coated with silver or other high-reflecting films.
7. a kind of continuous laser diode planar array pumping homogeneity pick-up unit according to claim 1, it is characterized in that, this device also comprises two pieces of light receiving plates, is arranged at the both sides of described optical waveguide respectively, for receiving the pump light of described V-arrangement reflector reflection.
8. a kind of continuous laser diode planar array pumping homogeneity pick-up unit according to any one of claim 1 to 7, it is characterized in that, described driver moves relative to the exiting surface of described optical waveguide line by line point by point for driving described V-arrangement reflector, make described fibre-optical splice line by line pointwise receive the light in the precalculated position of the exiting surface of described optical waveguide.
9. a kind of continuous laser diode planar array pumping homogeneity pick-up unit according to any one of claim 1 to 7, it is characterized in that, for the light in each precalculated position of the exiting surface of described optical waveguide, described processor obtains some luminous power numerical value, and using the mean value of these several luminous power numerical value as the luminous power numerical value in each precalculated position.
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