CN106410595A - Passively Q-switched eye-safe laser based on Nd:LuAG crystal - Google Patents
Passively Q-switched eye-safe laser based on Nd:LuAG crystal Download PDFInfo
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- CN106410595A CN106410595A CN201610839610.XA CN201610839610A CN106410595A CN 106410595 A CN106410595 A CN 106410595A CN 201610839610 A CN201610839610 A CN 201610839610A CN 106410595 A CN106410595 A CN 106410595A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/14—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range characterised by the material used as the active medium
- H01S3/16—Solid materials
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/02—Constructional details
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/14—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range characterised by the material used as the active medium
- H01S3/16—Solid materials
- H01S3/1601—Solid materials characterised by an active (lasing) ion
- H01S3/1603—Solid materials characterised by an active (lasing) ion rare earth
- H01S3/1611—Solid materials characterised by an active (lasing) ion rare earth neodymium
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- Optics & Photonics (AREA)
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Abstract
The invention relates to a passively Q-switched eye-safe laser based on a Nd:LuAG crystal. The passively Q-switched eye-safe laser comprises an LD pumping source, a coupling lens group, a back-cavity mirror and an output mirror, which are arranged along a light path direction; the back-cavity mirror and the output mirror form a resonant cavity; a laser crystal and a passively Q-switched crystal are arranged in the resonant cavity along the light path direction; the laser crystal is the Nd:LuAG crystal; and the passively Q-switched crystal is a V3+:YAG sheet. According to the laser disclosed by the invention, the Nd:LuAG is used as the laser crystal; because the Nd:LuAG crystal has the advantages of good physical and chemical performances, relatively wide bandwidth, relatively small crystal lattices and the like, people pay more and more attentions and research the Nd:LuAG crystal; and thus, the new development direction of the solid laser is pushed.
Description
Technical field
The present invention relates to a kind of be based on Nd:The passive Q-adjusted eye-safe laser of LuAG crystal, belongs to the skill of solid-state laser
Art field.
Background technology
The laser of 1.44 mum wavelengths has many important applications.First, 1.44 μm of wavelength belonging to safety range of human eye,
Therefore there is important application in eye treatment medical field.Additionally, 1.44 μm of laser equally have in communication, industry, military field
Important application.At present, the acquisition with regard to 1.44 mu m wavebands depends on Nd both at home and abroad:YAG crystal and Nd:YAG pottery.
At present, people are to Nd:Application in solid state laser for the LuAG crystal is concentrated mainly on 1.06 μm and 1.3 μm of ripples
Section, such as X.T.Chen et al. utilize Nd:As laser crystal, multilayer carbon nanotube is saturated absorbing body (Sub- to LuAG crystal
100ns passively Q-switched Nd:LuAG laser with multi-walled carbon nanotube,
《Optics&Laser Technology》, Vol.64,2014) and obtain 1064.1nm wavelength, minimum pulse width is the tune Q arteries and veins of 78ns
Punching；In addition, CHENG LIU et al. utilizes Nd:LuAG crystal is as laser crystal, V3+:YAG is saturated absorbing body
(Experimental and theoretical study of a passively Q-switched Nd:LuAG laser
at 1.3μm with a V3+:YAG saturable absorber,《Journal of the Optical Society of
America B》, Vol.32,2015) produce operation wavelength 1336nm, minimum pulse width is the Q impulse of 17ns.In prior art
Also it is not based on Nd:The correlational study of the human eye safe waveband laser of LuAG and patent documentation.
In addition, in prior art, V3+:YAG is usually used to the Q switched element as 1.3um-1.5um wavelength laser.
Content of the invention
For the deficiencies in the prior art, the present invention provides one kind to be based on Nd:The passive Q-adjusted human gingival fibroblasts of LuAG crystal
Device.
Summary of the invention：
The present invention utilizes Nd:LuAG crystal and V3+:YAG, proposes one kind and is based on Nd:The passive Q-adjusted human eye peace of LuAG crystal
Full laser instrument, using Nd:LuAG crystal is as gain medium, V3+:YAG, as saturated absorbing body, is obtained by passive Q-adjusted
Export to 1.44 μm of pulse lasers.In prior art, the V of diode-end-pumped3+:YAG saturated absorbing body is passive Q-adjusted
1.44μm Nd:LuAG laser instrument is not also reported.
The technical scheme is that：
One kind is based on Nd:The passive Q-adjusted eye-safe laser of LuAG crystal, including the LD pump arranging along optical path direction
Pu source, coupled lens group, Effect of Back-Cavity Mirror and outgoing mirror；Effect of Back-Cavity Mirror and outgoing mirror constitute resonator cavity, and resonance intracavity is along optical path direction
It is provided with laser crystal and passive Q-adjusted crystal；Described laser crystal is Nd:LuAG crystal, passive Q-adjusted crystal is V3+:YAG is thin
Piece；The input face of Effect of Back-Cavity Mirror is coated with the deielectric-coating that the light transmission rate to 808nm wavelength is T 99.8%, on the concave surface of Effect of Back-Cavity Mirror
It is coated with the light transmission rate to 808nm wavelength to be T 99.8%, be Jie of R 99.9% to the light transmission rate of 1442.6nm wavelength
Plasma membrane；The input face of outgoing mirror is coated with the deielectric-coating that the light transmission rate to 1442.6nm is T=1～5%.Wherein, LD pumping source
Refer to, Laser Diode laser diode pumping source.
Preferably, laser crystal and passive Q-adjusted crystal parcel are arranged in indium foil, and described indium foil is fixedly installed on cooling aluminum
In block.Thermostatic control is carried out to cooling aluminium block by refrigerating plant, so realize the constant temperature to laser crystal and passive Q-adjusted crystal and
Cooling controls；Wherein, cooling aluminium block is device well-known to those skilled in the art.
Preferably, described LD pumping source is the semiconductor laser of optical fiber coupling output, and core diameter is 400 μm, number
Value aperture is 0.22, and the spot radius converging on laser crystal are 200 μm.
Preferably, described Nd:The doping content of LuAG crystal is 1～5%, a size of 3 × 3 × 6mm3.
Preferably, described V3+:YAG thin slice is 80% to the initial small-signal transmitance of 1442.6nm wavelength.
Beneficial effects of the present invention are：
1. of the present invention based on Nd:The passive Q-adjusted eye-safe laser of LuAG crystal, using Nd:LuAG is as sharp
Luminescent crystal, Nd:LuAG crystal because having good physics and chemical property, broader bandwidth, the advantages of lattice is less and increasingly
By concern and the research of people, promote the development new direction of solid state laser；
2. of the present invention based on Nd:The passive Q-adjusted eye-safe laser of LuAG crystal, using Nd:LuAG is as sharp
Luminescent crystal, with Nd:YAG crystal phase ratio, for4F3/2Energy level, Nd:LuAG crystal has larger fluorescence lifetime 277us, more has
Beneficial to generation high-energy Q impulse；
3. of the present invention based on Nd:The passive Q-adjusted eye-safe laser of LuAG crystal, using V3+:YAG crystal conduct
Saturated absorbing body, its ground state absorption cross section is big, saturated absorption wide waveband, and ground state absorption loss is little, and recovery time is short；
4. of the present invention based on Nd:The passive Q-adjusted eye-safe laser of LuAG crystal, using passive Q-adjusted, with active
Q-regulating technique is compared, and passive Q-adjusted element is little and without external driver device, and technology is simpler.
Brief description
Fig. 1 is of the present invention based on Nd:The structural representation of the passive Q-adjusted eye-safe laser of LuAG crystal；
Fig. 2 is corresponding pulse diagram under maximum average output power；
Wherein, 1, LD pumping source；2nd, coupled lens group；3rd, Effect of Back-Cavity Mirror；4th, laser crystal；5th, passive Q-adjusted crystal；6th, export
Mirror.
Specific embodiment
With reference to embodiment and Figure of description, the present invention will be further described, but not limited to this.
Embodiment 1
As shown in Figure 1.
One kind is based on Nd:The passive Q-adjusted eye-safe laser of LuAG crystal, including the LD pump arranging along optical path direction
Pu source 1, coupled lens group 2, Effect of Back-Cavity Mirror 3 and outgoing mirror 6；Effect of Back-Cavity Mirror 3 and outgoing mirror 6 constitute resonator cavity, and resonance intracavity is along light
Road direction is provided with laser crystal 4 and passive Q-adjusted crystal 4；Described laser crystal 4 is Nd:LuAG crystal, passive Q-adjusted crystal 4 is
V3+:YAG thin slice；The light transmission rate that the input face of Effect of Back-Cavity Mirror 3 is coated with to 808nm wavelength is 99.8% deielectric-coating, Effect of Back-Cavity Mirror 3
Light transmission rate to 808nm wavelength is coated with concave surface be 99.8%, be 99.9% Jie to the light transmission rate of 1442.6nm wavelength
Plasma membrane；The input face of outgoing mirror 6 is coated with the deielectric-coating that the light transmission rate to 1442.6nm is T=2%.
Embodiment 2
It is based on Nd as described in Example 1:The passive Q-adjusted eye-safe laser of LuAG crystal, except that, laser
Crystal 4 and passive Q-adjusted crystal 5 parcel are arranged in indium foil, and described indium foil is fixedly installed in cooling aluminium block.By water-cooling system pair
Cooling aluminium block carries out thermostatic control, and then realizes the constant temperature to laser crystal and passive Q-adjusted crystal and cooling control.
Embodiment 3
It is based on Nd as described in Example 1:The passive Q-adjusted eye-safe laser of LuAG crystal, except that, described
LD pumping source 1 be optical fiber coupling output semiconductor laser, core diameter be 400 μm, numerical aperture be 0.22, converge to
Spot radius on laser crystal 4 are 200 μm.
Embodiment 4
It is based on Nd as described in Example 1:The passive Q-adjusted eye-safe laser of LuAG crystal, except that, described
Nd:The doping content of LuAG crystal is 1%, a size of 3 × 3 × 6mm3.
Embodiment 5
It is based on Nd as described in Example 1:The passive Q-adjusted eye-safe laser of LuAG crystal, except that, described
V3+:YAG thin slice is 80% to the initial small-signal transmitance of 1442.6nm wavelength.
Using described in embodiment 1-5 based on Nd:The passive Q-adjusted eye-safe laser of LuAG crystal, finally gives
1.44 μm of short-pulse laser outputs, when pump absorption power is 11.1W, getable maximum average output power, pulse weight
Complex frequency and minimum pulse width are 424mW, 17.4KHz and 72ns respectively.As shown in Figure 2.
Claims (5)
1. one kind is based on Nd:The passive Q-adjusted eye-safe laser of LuAG crystal is it is characterised in that include along optical path direction
The LD pumping source of setting, coupled lens group, Effect of Back-Cavity Mirror and outgoing mirror；Effect of Back-Cavity Mirror and outgoing mirror constitute resonator cavity, resonance intracavity edge
Optical path direction and be provided with laser crystal and passive Q-adjusted crystal；Described laser crystal is Nd:LuAG crystal, passive Q-adjusted crystal is
V3+:YAG thin slice；The input face of Effect of Back-Cavity Mirror is coated with the deielectric-coating that the light transmission rate to 808nm wavelength is T 99.8%, Effect of Back-Cavity Mirror
Concave surface on be coated with the light transmission rate to 808nm wavelength and be T 99.8%, be R to the light transmission rate of 1442.6nm wavelength
99.9% deielectric-coating；The input face of outgoing mirror is coated with the deielectric-coating that the light transmission rate to 1442.6nm is T=1～5%.
2. according to claim 1 based on Nd:The passive Q-adjusted eye-safe laser of LuAG crystal is it is characterised in that swash
Luminescent crystal and passive Q-adjusted crystal parcel are arranged in indium foil, and described indium foil is fixedly installed in cooling aluminium block.
3. according to claim 1 based on Nd:The passive Q-adjusted eye-safe laser of LuAG crystal is it is characterised in that institute
The LD pumping source stated is the semiconductor laser of optical fiber coupling output, and core diameter is 400 μm, and numerical aperture is 0.22, assembles
Spot radius on laser crystal are 200 μm.
4. according to claim 1 based on Nd:The passive Q-adjusted eye-safe laser of LuAG crystal is it is characterised in that institute
State Nd:The doping content of LuAG crystal is 1～5%, a size of 3 × 3 × 6mm3.
5. according to claim 1 based on Nd:The passive Q-adjusted eye-safe laser of LuAG crystal is it is characterised in that institute
State V3+:YAG thin slice is 80% to the initial small-signal transmitance of 1442.6nm wavelength.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610839610.XA CN106410595A (en) | 2016-09-22 | 2016-09-22 | Passively Q-switched eye-safe laser based on Nd:LuAG crystal |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610839610.XA CN106410595A (en) | 2016-09-22 | 2016-09-22 | Passively Q-switched eye-safe laser based on Nd:LuAG crystal |
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| CN201610839610.XA Pending CN106410595A (en) | 2016-09-22 | 2016-09-22 | Passively Q-switched eye-safe laser based on Nd:LuAG crystal |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109188392A (en) * | 2018-09-05 | 2019-01-11 | 哈尔滨工业大学 | A kind of detection device of remote small-signal |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1645691A (en) * | 2005-02-02 | 2005-07-27 | 中国科学院物理研究所 | Active and passive Q-adjusted single longitudinal mode laser |
| US20060159132A1 (en) * | 2005-01-19 | 2006-07-20 | Young York E | System and method for a passively Q-switched, resonantly pumped, erbium-doped crystalline laser |
-
2016
- 2016-09-22 CN CN201610839610.XA patent/CN106410595A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060159132A1 (en) * | 2005-01-19 | 2006-07-20 | Young York E | System and method for a passively Q-switched, resonantly pumped, erbium-doped crystalline laser |
| CN1645691A (en) * | 2005-02-02 | 2005-07-27 | 中国科学院物理研究所 | Active and passive Q-adjusted single longitudinal mode laser |
Non-Patent Citations (3)
| Title |
|---|
| CHENG LIU ET AL.: "Experimental and theoretical study of a passively Q-switched Nd:LuAG laser at 1.3 μm with a V3+:YAG saturable absorber", 《JOURNAL OF THE OPTICAL SOCIETY OF AMERICAL B》 * |
| H. N. ZHANG ET AL.: "High efficiency Nd:YAG ceramic eye-safe laser operating at 1442.8nm", 《OPTICS LETTERS》 * |
| 刘杨等: "Nd:LuAG混晶1123nm被动调Q激光器", 《物理学报》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109188392A (en) * | 2018-09-05 | 2019-01-11 | 哈尔滨工业大学 | A kind of detection device of remote small-signal |
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Application publication date: 20170215 |