CN207625068U - A kind of adjustable Nd of pulsewidth nano-seconds:YAG solid state lasers - Google Patents
A kind of adjustable Nd of pulsewidth nano-seconds:YAG solid state lasers Download PDFInfo
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- CN207625068U CN207625068U CN201721581615.3U CN201721581615U CN207625068U CN 207625068 U CN207625068 U CN 207625068U CN 201721581615 U CN201721581615 U CN 201721581615U CN 207625068 U CN207625068 U CN 207625068U
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Abstract
A kind of adjustable Nd of pulsewidth nano-seconds:YAG solid state lasers belong to laser technology field, the adjustable Nd of pulsewidth nano-seconds:YAG solid state lasers include the first total reflective mirror, electro-optic Q-switched crystal, polarizing film, laser bar, the second total reflective mirror, parallel microscope group and the outgoing mirror of being all-trans；First total reflective mirror, electro-optic Q-switched crystal, polarizing film, laser bar and the second total reflective mirror are arranged co-axially on straight line in order, it is parallel to be all-trans microscope group and outgoing mirror is located at except the axis where the laser beam that laser bar is sent out, first total reflective mirror and outgoing mirror constitute laser resonator, the parallel microscope group that is all-trans includes third total reflective mirror and the 4th total reflective mirror parallel to each other, second total reflective mirror is connected with knob or/and the parallel microscope group that is all-trans is connected with roll-setting gear, knob is for driving the second total reflective mirror to rotate, roll-setting gear is for adjusting the distance between third total reflective mirror and the 4th total reflective mirror, first total reflective mirror, second total reflective mirror, third total reflective mirror and the 4th total reflective mirror plate the film that is all-trans that wavelength is 1064nm.
Description
Technical field
The utility model is related to laser technology field, more particularly to a kind of adjustable Nd of pulsewidth nano-seconds:YAG solids swash
Light device.
Background technology
Solid state laser is widely used in laser induced breakdown spectroscopy field, utilizes high energy pulse laser ablation sample
Product material makes the micro-example transient evaporation of material surface form high temperature, highdensity plasma, measures Plasma-Atomic
Line wavelength in emission spectrum and intensity can complete the qualitative and quantitative analysis of chemical element contained by specimen material.Currently,
It is usually 4-20ns to apply the laser pulse width of the 1064nm wave band solid state lasers in the field, in recent years, with induced with laser
The fast development of breakdown spectral needs pulsewidth adjustable extent and the larger laser of peak power in ns order magnitude ranges, existing
Single pulse width laser cannot meet the field the needs of.
Utility model content
Laser pulse width range in order to solve the problems, such as 1064nm wave bands solid state laser in the prior art is nonadjustable, this reality
A kind of adjustable Nd of pulsewidth nano-seconds is provided with novel:YAG solid state lasers, the adjustable Nd of pulsewidth nano-seconds:
YAG solid state lasers include the first total reflective mirror, electro-optic Q-switched crystal, polarizing film, laser bar, the second total reflective mirror, the parallel microscope group that is all-trans
And outgoing mirror；
First total reflective mirror, electro-optic Q-switched crystal, polarizing film, laser bar and the second total reflective mirror are arranged co-axially in one in order
On straight line, parallel to be all-trans microscope group and outgoing mirror is located at except the axis where the laser beam that the laser bar is sent out, first is complete
Anti- mirror and outgoing mirror constitute laser resonator, and the parallel microscope group that is all-trans includes third total reflective mirror and the 4th total reflective mirror parallel to each other,
Second total reflective mirror is used for the third total reflective mirror or the 4th total reflective mirror to the parallel microscope group that is all-trans, outgoing mirror by laser reflection and uses
In the laser output that will be reflected from the parallel microscope group that is all-trans, second total reflective mirror is connected with knob or/and described parallel
The microscope group that is all-trans is connected with roll-setting gear, and knob is for driving the second total reflective mirror to rotate, and roll-setting gear is for adjusting third
The distance between total reflective mirror and the 4th total reflective mirror, the first total reflective mirror, the second total reflective mirror, third total reflective mirror and the 4th total reflective mirror plate
Wavelength is the film that is all-trans of 1064nm.
First total reflective mirror is concave mirror.
Second total reflective mirror is plane total reflective mirror.
The third total reflective mirror and the 4th total reflective mirror are plane total reflective mirror.
The transmitance of the outgoing mirror is 70%.
The roll-setting gear is push-pull rod, and the output rod of push-pull rod connects with the third total reflective mirror or the 4th total reflective mirror
It connects.
Laser in the utility model, by changing order of reflection of the laser between the parallel microscope group that is all-trans or parallel
The chamber that the light path of the microscope group that is all-trans internal reflection changes resonant cavity is long, to realize the adjustable pulse width of output laser, can be lured according to laser
The needs for leading breakdown spectral experiment adjust out corresponding laser pulse width, enormously simplify experimental facilities, compensate for single pulsewidth and swash
Defect of the light on the field, polishing short slab, and the structure in the utility model is simple, easy to operation, cost of manufacture is relatively low.
Description of the drawings
Fig. 1 is a kind of adjustable Nd of pulsewidth nano-seconds provided by the utility model:The structural representation of YAG solid state lasers
Figure；
Fig. 2 is the adjustable Nd of another pulsewidth nano-seconds provided by the utility model:The structure of YAG solid state lasers is shown
It is intended to；
Fig. 3 is the adjustable Nd of another pulsewidth nano-seconds provided by the utility model:The structure of YAG solid state lasers
Schematic diagram；
Fig. 4 is the structural schematic diagram of the second total reflective mirror different rotation angle in laser provided by the utility model.
Wherein,
1 first total reflective mirror, 2 electro-optic Q-switched crystals, 3 polarizing films, 4 laser bars, 5 second total reflective mirrors, the 6 parallel microscope groups that are all-trans, 7
Outgoing mirror, 8 third total reflective mirrors, 9 the 4th total reflective mirrors, 10 knobs, 11 roll-setting gears.
Specific implementation mode
Laser pulse width range in order to solve the problems, such as 1064nm wave bands solid state laser in the prior art is nonadjustable, this reality
A kind of adjustable Nd of pulsewidth nano-seconds is provided with novel:YAG(Neodymium-doped Yttrium Aluminium
Garnet, yag crystal) solid state laser, the adjustable Nd of the pulsewidth nano-seconds:YAG solid state lasers include first
Total reflective mirror 1, electro-optic Q-switched crystal 2, polarizing film 3, laser bar 4, the second total reflective mirror 5, parallel microscope group 6 and the outgoing mirror 7 of being all-trans；
First total reflective mirror 1, electro-optic Q-switched crystal 2, polarizing film 3, laser bar 4 and the second total reflective mirror 5 are coaxially arranged in order
Point-blank, i.e. the first total reflective mirror 1, electro-optic Q-switched crystal 2, polarizing film 3, laser bar 4 and the second total reflective mirror 5 are along sharp
The direction of propagation arrangement for the laser beam that optical wand 4 is sent out, laser bar 4 is Nd:YAG laser bars, i.e. activated material are yttroalumite pomegranate
The laser bar of stone crystal, it is parallel to be all-trans microscope group 6 and outgoing mirror 7 is located at except the axis where the laser beam that laser bar 4 is sent out,
In, the first total reflective mirror 1 and outgoing mirror 7 constitute laser resonator, and the parallel microscope group 6 that is all-trans includes third total reflective mirror 8 parallel to each other
With the 4th total reflective mirror 9, the second total reflective mirror 5 is used for laser reflection is complete to the third total reflective mirror 8 of the parallel microscope group 6 that is all-trans or the 4th
Anti- mirror 9, laser carry out roundtrip between third total reflective mirror 8 and the 4th total reflective mirror 9, and outgoing mirror 7 from parallel for that will be all-trans
The laser output that microscope group 6 reflects, in the present invention, as shown in Figure 1, the second total reflective mirror 5 is connected with knob 10, alternatively,
As inscribed shown in 2, the parallel microscope group 6 that is all-trans is connected with roll-setting gear 11, alternatively, as shown in figure 3, the second total reflective mirror 5 is connected with knob
10 simultaneously the parallel microscope group 6 that is all-trans be connected with roll-setting gear 11, knob 10 is for driving the second total reflective mirror 5 to rotate, roll adjustment
Device 11 is push-pull rod for adjusting the distance between third total reflective mirror 8 and the 4th total reflective mirror 9, roll-setting gear 11, push-pull rod
Output rod is connect with third total reflective mirror 8 or the 4th total reflective mirror 9, when the output rod of push-pull rod is released, third total reflective mirror 8 and the 4th
The distance between total reflective mirror 9 reduce, when the output rod of push-pull rod retracts, between third total reflective mirror 8 and the 4th total reflective mirror 9 away from
From becoming larger, it is being all-trans for 1064nm that the first total reflective mirror 1, the second total reflective mirror 5, third total reflective mirror 8 and the 4th total reflective mirror 9, which plate wavelength,
Film.
In the present invention, the first total reflective mirror 1 is concave mirror, and the second total reflective mirror 5 is plane total reflective mirror, and third is complete
Anti- mirror 8 and the 4th total reflective mirror 9 are plane total reflective mirror, and the transmitance of outgoing mirror 7 can be 70%.In the utility model, power supply
Switch is connect with the electrical wire interface of electro-optic Q-switched crystal 2, to which high pressure is applied to electro-optic Q-switched crystal 2.The size of laser bar 4 can
To select the laser bar of 8 × 120mm of φ, 1.064 μm of anti-reflection films are plated in two end faces of laser bar, in order to avoid laser medium thermal effect
The damage of laser bar 4 is coped with, can be that laser bar 4 arranges water cooling plant, laser bar 4 be carried out using circulating water mode cold
But, cooling temperature can be 20 DEG C.
The adjustable Nd of pulsewidth nano-seconds in the utility model:The use principle of YAG solid state lasers is as follows：
Water cooling plant and power switch are opened, pump voltage is gradually increased, when gain, which is more than loss, reaches threshold value, is started
There is laser output, continue growing pump voltage, output laser energy is made to gradually increase, until the laser energy of output reaches required
Value；
If as shown in Figure 1, being only that knob 10 is arranged in the second total reflective mirror 5 in the utility model, in the laser energy of output
The knob 10 being connect with the second total reflective mirror 5 is slowly rotated after reaching desirable value, when knob 10 drives the second total reflective mirror 5 to rotate difference
When angle, order of reflection of the laser between third total reflective mirror 8 and the 4th total reflective mirror 9 also can be different, for example, being revolved in Fig. 1 and Fig. 4
Button 10 drives the angle of the second total reflective mirror 5 rotation different, i.e. complete in third in the parallel order of reflection being all-trans in microscope group 6 in Fig. 1
Order of reflection between anti-mirror 8 and the 4th total reflective mirror 9 be twice, it is anti-between third total reflective mirror 8 and the 4th total reflective mirror 9 in Fig. 4
It is primary to penetrate number, is exported from the parallel laser reflected in microscope group 6 that is all-trans by outgoing mirror 7, it is well known that work as order of reflection
When reduction, the chamber length of resonant cavity can shorten, and when reflection increases, the chamber length of resonant cavity can be elongated, according to formulaIt is known that the chamber length of resonant cavity is directly proportional to the laser pulse width of output, wherein
Δ t is output laser pulse width, and T is the transmitance of outgoing mirror 7, and L is other losses of resonant cavity in addition to transmission loss, and l is humorous
Shake chamber chamber it is long, ni、nt、nfRespectively initial, threshold value and final inverted population, c are therefore the light velocity in vacuum works as reflection
Number is reduced, and the chamber length of resonant cavity becomes in short-term, and the laser pulse width of output can narrow, and when order of reflection increases, the chamber of resonant cavity is long
When elongated, the laser pulse width of output can broaden, and therefore, drive the second total reflective mirror 5 to rotate different angles by knob 10, can be right
Laser pulse width is adjusted, wherein the rotation angle of the second total reflective mirror 5 and laser third total reflective mirror 8 and the 4th total reflective mirror 9 it
Between the relationship of order of reflection can reasonably be designed according to actually required adjustable pulse duration range, by reasonably setting
Count the distance between third total reflective mirror 8 and the 4th total reflective mirror 9, the length of third total reflective mirror 8 and the 4th total reflective mirror 9, outgoing mirror 7 with
Angle between the parallel microscope group 6 that is all-trans, outgoing mirror 7 and parallel the distance between the microscope group 6 that is all-trans, so that laser is in parallel total reflective mirror
Order of reflection between group 6 is in certain range, and then realizes that pulsewidth can be adjusted in a certain range；
If as shown in Fig. 2, being only that roll-setting gear 11 is arranged in the parallel microscope group 6 that is all-trans in the utility model, in swashing for output
Light energy controls roll-setting gear 11 to change the distance between third total reflective mirror 8 and the 4th total reflective mirror 9, when mutual after reaching desirable value
When the distance between parallel third total reflective mirror 8 and the 4th total reflective mirror 9 are different, laser is all-trans in third total reflective mirror 8 and the 4th
Light path between mirror 9 also can be different, and when the distance between third total reflective mirror 8 and the 4th total reflective mirror 9 become larger, light path is elongated, when
The distance between third total reflective mirror 8 and the 4th total reflective mirror 9 become hour, and light path shortens, it is well known that the resonant cavity when light path is elongated
Chamber length can it is elongated, when light path become in short-term resonant cavity chamber length can shorten, can be obtained further according to above-mentioned formula, the chamber of resonant cavity
When long elongated, the laser pulse width of output can broaden, and the chamber length of resonant cavity becomes in short-term, and the laser pulse width of output can narrow, and therefore, leads to
The distance between third total reflective mirror 8 and the 4th total reflective mirror 9 are overregulated, can realize the adjusting to laser output pulse width, wherein the
The length of angle, third total reflective mirror 8 and the 4th total reflective mirror 9 between the horizontal laser beam that two total reflective mirrors 5 and laser bar 4 are sent out,
Angle between outgoing mirror 7 and the parallel microscope group 6 that is all-trans, outgoing mirror 7 can be according to practical feelings with parallel the distance between the microscope group 6 that is all-trans
Condition is rationally designed so that laser at the light path between the parallel microscope group 6 that is all-trans in certain range, and then realize that pulsewidth can
To be adjusted in a certain range；
As shown in figure 3, it is simultaneously that the parallel microscope group 6 that is all-trans is set that if knob 10, which is arranged, for the second total reflective mirror 5 in the utility model
Roll-setting gear 11 is set, then the pulsewidth for exporting laser can be adjusted simultaneously by turn knob 10 and adjustment roll-setting gear 11
Section.
Laser in the utility model, by changing order of reflection of the laser between the parallel microscope group 6 that is all-trans or flat
The chamber that the light path of capable 6 internal reflection of microscope group of being all-trans changes resonant cavity is long, can be according to laser to realize the adjustable pulse width of output laser
The needs of induced breakdown spectroscopy experiment adjust out corresponding laser pulse width, enormously simplify experimental facilities, compensate for single pulsewidth
Defect of the laser on the field, polishing short slab, and the structure in the utility model is simple is easy to operation, cost of manufacture compared with
It is low.
The above is only the preferred embodiment of the present invention, is not intended to limit the utility model, all in this practicality
Within novel spirit and principle, any modification, equivalent replacement, improvement and so on should be included in the guarantor of the utility model
Within the scope of shield.
Claims (6)
1. a kind of adjustable Nd of pulsewidth nano-seconds:YAG solid state lasers, which is characterized in that the pulsewidth nano-seconds are adjustable
Nd:YAG solid state lasers include the first total reflective mirror, electro-optic Q-switched crystal, polarizing film, laser bar, the second total reflective mirror, parallel complete
Anti- microscope group and outgoing mirror；
First total reflective mirror, electro-optic Q-switched crystal, polarizing film, laser bar and the second total reflective mirror are arranged co-axially in one directly in order
It is parallel to be all-trans microscope group and outgoing mirror is located at except the axis where the laser beam that the laser bar is sent out, the first total reflective mirror on line
Laser resonator is constituted with outgoing mirror, the parallel microscope group that is all-trans includes third total reflective mirror and the 4th total reflective mirror parallel to each other, and second
Total reflective mirror is used for the third total reflective mirror or the 4th total reflective mirror to the parallel microscope group that is all-trans by laser reflection, and outgoing mirror is used for will
The laser output reflected from the parallel microscope group that is all-trans, second total reflective mirror are connected with knob or/and described parallel are all-trans
Microscope group is connected with roll-setting gear, and for driving the second total reflective mirror to rotate, roll-setting gear is all-trans knob for adjusting third
The distance between mirror and the 4th total reflective mirror, the first total reflective mirror, the second total reflective mirror, third total reflective mirror and the 4th total reflective mirror plate wavelength
For the film that is all-trans of 1064nm.
2. the adjustable Nd of pulsewidth nano-seconds according to claim 1:YAG solid state lasers, which is characterized in that described
One total reflective mirror is concave mirror.
3. the adjustable Nd of pulsewidth nano-seconds according to claim 1:YAG solid state lasers, which is characterized in that described
Two total reflective mirrors are plane total reflective mirror.
4. the adjustable Nd of pulsewidth nano-seconds according to claim 1:YAG solid state lasers, which is characterized in that described
Three total reflective mirrors and the 4th total reflective mirror are plane total reflective mirror.
5. the adjustable Nd of pulsewidth nano-seconds according to claim 1:YAG solid state lasers, which is characterized in that described defeated
The transmitance of appearance is 70%.
6. the adjustable Nd of pulsewidth nano-seconds according to claim 1:YAG solid state lasers, which is characterized in that the tune
It is push-pull rod away from device, the output rod of push-pull rod is connect with the third total reflective mirror or the 4th total reflective mirror.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721581615.3U CN207625068U (en) | 2017-11-23 | 2017-11-23 | A kind of adjustable Nd of pulsewidth nano-seconds:YAG solid state lasers |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721581615.3U CN207625068U (en) | 2017-11-23 | 2017-11-23 | A kind of adjustable Nd of pulsewidth nano-seconds:YAG solid state lasers |
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| CN207625068U true CN207625068U (en) | 2018-07-17 |
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| CN201721581615.3U Expired - Fee Related CN207625068U (en) | 2017-11-23 | 2017-11-23 | A kind of adjustable Nd of pulsewidth nano-seconds:YAG solid state lasers |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107681422A (en) * | 2017-11-23 | 2018-02-09 | 沈阳理工大学 | A kind of adjustable Nd of pulsewidth nano-seconds:YAG solid state lasers |
-
2017
- 2017-11-23 CN CN201721581615.3U patent/CN207625068U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107681422A (en) * | 2017-11-23 | 2018-02-09 | 沈阳理工大学 | A kind of adjustable Nd of pulsewidth nano-seconds:YAG solid state lasers |
| CN107681422B (en) * | 2017-11-23 | 2024-02-06 | 沈阳理工大学 | Nd-YAG solid laser with adjustable pulse width in nanosecond range |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180717 Termination date: 20211123 |
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| CF01 | Termination of patent right due to non-payment of annual fee |