CN204668716U - Tm:YAP acousto-optic Q modulation switched laser system - Google Patents
Tm:YAP acousto-optic Q modulation switched laser system Download PDFInfo
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- CN204668716U CN204668716U CN201520257357.8U CN201520257357U CN204668716U CN 204668716 U CN204668716 U CN 204668716U CN 201520257357 U CN201520257357 U CN 201520257357U CN 204668716 U CN204668716 U CN 204668716U
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Abstract
The utility model relates to a kind of Tm:YAP acousto-optic Q modulation switched laser system, comprise the pumping laser reflector (1), optical fiber (2), coupled system (3), TM:YAP crystal (4), acousto-optic Q modulation switch (5), concavees lens (6) and the photodetector (7) that set gradually according to optical path direction, photodetector (7) is also connected with oscilloscope (8), and described acousto-optic Q modulation switch (5) is also connected with signal generator (9).The Tm:YAP acousto-optic Q modulation switched laser system that the utility model provides utilizes TM:YAP laser theoretical, manufacture the gain switch laser of a kind of miniaturization, high-power output, the field such as laser radar, medical application can be widely used in, reduce cost.
Description
Technical field
The utility model relates to a kind of pump laser, particularly relates to a kind of Tm:YAP acousto-optic Q modulation switched laser system, belongs to laser equipment field.
Background technology
2 mu m waveband light have the characteristic of eye-safe, and it has purposes widely in military affairs, medical treatment and environmental monitoring etc.As the operation material of 2 mu m waveband laser devices, Tm:YAP crystal has that doping content is high, conversion efficiency advantages of higher, is a kind of novel solid laser material with very big application potential.General, the field that this wave band is conventional comprises laser radar, medical application etc.External more to this research at present, and domestic related application research has just just started, people are around how improving 2 mu m waveband laser power outputs and efficiency has carried out multi-faceted exploratory development from material and device, after particularly high power semiconductor lasers occurs, people are impelled to be that pumping source carries out deeper research and development on the 2 mu m waveband laser devices providing efficient, miniaturized and stable performance with laser diode.
Several basic problems in this field are at present:
1. production domesticization is lower, and domestic at present do not have systematic research and stable material object;
2. compact apparatus is less, significantly limit the field of its application;
3., compared with traditional pump mode, pumping efficiency is lower.
Utility model content
In order to overcome the deficiencies in the prior art, resolving the problem of prior art, making up the deficiency of existing existing product in the market.
The utility model provides a kind of Tm:YAP acousto-optic Q modulation switched laser system, comprise the pumping laser reflector, optical fiber, coupled system, TM:YAP crystal, acousto-optic Q modulation switch, concavees lens and the photodetector that set gradually according to optical path direction, described photodetector is also connected with oscilloscope, and described acousto-optic Q modulation switch is also connected with signal generator.
Preferably, the laser that above-mentioned pumping generating laser exports exports through optical fiber, optical fiber core diameter 200 μm, numerical aperture NA=0.22, and optical fiber exports pump light and focuses on Tm:YAP crystals through 1: 1 coupled system.
Preferably, the acousto-optic crystal length of above-mentioned acousto-optic Q modulation switch is 46mm, and rf frequency is 27.12MHz, and energising loss, at diameter 3mm light beam, is 55% during power 50w, uses water-cooling pattern to freeze to it.
Preferably, above-mentioned Tm:YAP acousto-optic Q modulation switched laser system also comprises the DC power supply of powering for pumping laser reflector.
Preferably, the laser that above-mentioned pumping generating laser sends arrives photodetector successively after optical fiber, coupler, TM:YAP crystal, acousto-optic Q modulation switch, concavees lens, then arrives oscilloscope.
The Tm:YAP acousto-optic Q modulation switched laser system that the utility model provides utilizes TM:YAP laser theoretical, manufacture the gain switch laser of a kind of miniaturization, high-power output, the field such as laser radar, medical application can be widely used in, reduce cost.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation;
Fig. 2 is the utility model LD blocks current-power;
Fig. 3 is the utility model LD module output spectrum curve chart;
Fig. 4 is the utility model output pulse width and pump power graph of a relation;
Fig. 5 is the utility model output pulse width and repetition rate graph of a relation.
Reference numeral: 1-pumping laser reflector; 2-optical fiber; 3-coupled system; 4-TM:YAP crystal; 5-acousto-optic Q modulation switch; 6-concavees lens; 7-photodetector; 8-oscilloscope; 9-signal generator; 10-DC power supply.
Embodiment
Understand for the ease of those of ordinary skill in the art and implement the utility model, below in conjunction with the drawings and the specific embodiments, the utility model being described in further detail.
The TM:YAP acousto-optic Q modulation switched laser system that the utility model provides, comprise the pumping laser reflector 1, optical fiber 2, coupled system 3, TM:YAP crystal 4, acousto-optic Q modulation switch 5, concavees lens 6 and the photodetector 7 that set gradually according to optical path direction, photodetector 7 is also connected with oscilloscope 8, and acousto-optic Q modulation switch 5 is also connected with signal generator 9.The laser that pumping laser reflector 1 exports exports through optical fiber 2, optical fiber 2 core diameter 200 μm, numerical aperture NA=0.22, and optical fiber 2 exports pump light and focuses on Tm:YAP crystal 4 inside through 1: 1 coupled system.The acousto-optic crystal length of acousto-optic Q modulation switch 5 is 46mm, and rf frequency is 27.12MHz, and energising loss, at diameter 3mm light beam, is 55% during power 50w, uses water-cooling pattern to freeze to it.Tm:YAP acousto-optic Q modulation switched laser system also comprises the DC power supply 10 for pumping laser reflector 1 power supply.The laser that pumping laser reflector 1 sends arrives photodetector 7 successively after optical fiber 2, coupler 3, TM:YAP crystal 4, acousto-optic Q modulation switch 5, concavees lens 6, then arrives oscilloscope 8.
The utility model adopts the mode of LD end pumping, the LD module selected, its output center wavelength is 795.2nm (20 DEG C), optic spectrum line width is 1.7nm maximum operating currenbt 38.8A, peak power output 30.1W, Fig. 2 are the current-power graph of a relation of the LD module measured with power.The output spectrum curve that Fig. 3 is semiconductor module.
LD module Output of laser exports through optical fiber, optical fiber core diameter 200 μm, numerical aperture NA=0.22, and optical fiber exports pump light and focuses on Tm:YAP crystals through 1: 1 coupled system.
Fig. 4 is for being output pulse width and pump power variation relation figure under similarity condition, when pump power increases, pulse duration reduces, this be due to pump power increase while, on Tm:YAP crystal, the population of energy level accumulation increases, energy level stimulated tranisition rate becomes large, thus pulse duration is reduced.
Fig. 5 be output pulse width and energy with the graph of a relation of the repetition that works, can see when repetition rate is at below 200Hz, export pulse energy and pulse width variation little, and more than after 200Hz, when repetition rate increases, export pulse energy and reduce very soon, output pulse width increases fast.This is because under low-repetition-frequency operating state, the cycle in pulse spacing is long, by the impact that energy storage is saturated, exports pulse energy change little when repetition rate changes; Under high repetition frequency operating state, the cycle in pulse spacing is relatively short, and under Q switching closes the door the still unsaturated situation of energy storage, next enabling is arrived, and pulse energy is declined thereupon.
The embodiment of the above is better embodiment of the present utility model; not limit concrete practical range of the present utility model with this; scope of the present utility model comprises and is not limited to this embodiment, and the equivalence change that all shapes according to the utility model, structure are done is all in protection range of the present utility model.
Claims (5)
1. a Tm:YAP acousto-optic Q modulation switched laser system, it is characterized in that: described acousto-optic Q modulation switched laser system comprises the pumping laser reflector (1), optical fiber (2), coupled system (3), TM:YAP crystal (4), acousto-optic Q modulation switch (5), concavees lens (6) and the photodetector (7) that set gradually according to optical path direction, described photodetector (7) is also connected with oscilloscope (8), and described acousto-optic Q modulation switch (5) is also connected with signal generator (9).
2. Tm:YAP acousto-optic Q modulation switched laser system according to claim 1, it is characterized in that: the laser that described pumping laser reflector (1) exports exports through optical fiber (2), optical fiber (2) core diameter 200 μm, numerical aperture NA=0.22, optical fiber (2) exports pump light and focuses on Tm:YAP crystal (4) inside through 1: 1 coupled system.
3. Tm:YAP acousto-optic Q modulation switched laser system according to claim 1, it is characterized in that: the acousto-optic crystal length of described acousto-optic Q modulation switch (5) is 46mm, rf frequency is 27.12MHz, energising loss is at diameter 3mm light beam, be 55% during power 50w, use water-cooling pattern to freeze to it.
4. Tm:YAP acousto-optic Q modulation switched laser system according to claim 1, is characterized in that: described Tm:YAP acousto-optic Q modulation switched laser system also comprises the DC power supply (10) of powering for pumping laser reflector (1).
5. Tm:YAP acousto-optic Q modulation switched laser system according to claim 4, it is characterized in that: the laser that described pumping laser reflector (1) sends arrives photodetector (7) successively after optical fiber (2), coupler (3), TM:YAP crystal (4), acousto-optic Q modulation switch (5), concavees lens (6), then arrives oscilloscope (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520257357.8U CN204668716U (en) | 2015-04-21 | 2015-04-21 | Tm:YAP acousto-optic Q modulation switched laser system |
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| CN201520257357.8U CN204668716U (en) | 2015-04-21 | 2015-04-21 | Tm:YAP acousto-optic Q modulation switched laser system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111755943A (en) * | 2020-07-15 | 2020-10-09 | 山东大学 | Optical parametric oscillator based on pulse laser pumping and working method |
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2015
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111755943A (en) * | 2020-07-15 | 2020-10-09 | 山东大学 | Optical parametric oscillator based on pulse laser pumping and working method |
| CN111755943B (en) * | 2020-07-15 | 2022-05-31 | 山东大学 | Optical parametric oscillator based on pulse laser pumping and working method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150923 Termination date: 20160421 |