CN102593706A - Side pump circular rod shaped self-frequency-doubled crystal laser - Google Patents
Side pump circular rod shaped self-frequency-doubled crystal laser Download PDFInfo
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- CN102593706A CN102593706A CN2012100085640A CN201210008564A CN102593706A CN 102593706 A CN102593706 A CN 102593706A CN 2012100085640 A CN2012100085640 A CN 2012100085640A CN 201210008564 A CN201210008564 A CN 201210008564A CN 102593706 A CN102593706 A CN 102593706A
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Abstract
The invention provides a side pump circular rod shaped self-frequency-doubled crystal laser. The side pump circular rod shaped self-frequency-doubled crystal laser comprises a circular rod shaped self-frequency-doubled crystal, a pumping source, a laser resonant cavity and a cooling and heat radiation device, wherein the rod shaped crystal is placed in a crystal heat radiation device; the internal heat of the crystal is brought away through the heat exchange of a cooling liquid; and then the cooling liquid flows out from an outlet; the pumping source is that a semiconductor diode is fixed on a pumping source heat radiation device; a pumping light emitted by the pumping source enters from the crystal side surface and is absorbed; the crystal heat radiation device is provided with an isolated light transmitting structure between the side surface of the rod shaped crystal and the pumping source and has an effect of sealing the cooling liquid for the pumping light to penetrate through; the laser resonant cavity comprises a laser cavity mirror A and a laser cavity mirror B, which are respectively positioned on the external sides of the two ends of the rod shaped crystal, or comprises laser cavity mirror films, which are directly plated at two end surfaces of the rod shaped crystal; the side pump circular rod shaped self-frequency-doubled crystal laser provided by the invention has the advantage of simple structure; the crystal length and diameter are designed only according to frequency doubling efficiency; and by using m cycles and n lines of pumping sources at the side surface of the rod shaped crystal, the pumping light emitting part can be increased, the pumping power is increased and the making cost is reduced.
Description
Technical field
The present invention relates to a kind of laser, particularly a kind of all solid state laser based on the self-frequency-doubling crystal.
Background technology
Self frequency-changing's crystal is a kind of ideal style that obtains visible laser output.Active ions are doped into a crystal with nonlinear optical properties, and making it is laser crystal, has nonlinear function again.When the cut direction of crystal during along the direction cutting of phase matched, just can directly carry out at the basic frequency laser that crystals produces ion from frequency multiplication, from and frequently, from difference frequency, or from parametric oscillation, thereby the self frequency-changing's laser that obtains different wave length is exported.In principle, self frequency-changing's laser structure compact, stability is strong, and cost of manufacture is low.People are exploring efficiently always, are being fit to self frequency-changing's crystal of practicability in recent years, and wherein main research object is the self-frequency-doubling crystal.
But present self-frequency-doubling laser adopts the end pumping mode more; Patent " a kind of be suitable for laser display uses from frequency multiplication green glow solid state laser " (201010272964.3) for example, " a kind of lower powered green laser pen " (201010130463.1) and " a kind of single-frequency visible laser " (201010159919.7).This mode belongs to vertical pumping, and promptly laser direction is along pump light absorption direction.In order to realize exporting from frequency multiplication efficiently, when parameter of design crystal length, will consider the overlapping rate of abundant absorption, pump light and the laser of pump light simultaneously, and frequency-doubling conversion efficiency.Design is comparatively complicated.In addition, pump light is gone into a surface feeding sputtering from crystal, and the end face thermal effect is the most serious, ruptures easily during high power, has restricted Maximum pumping, and at present, pump power is limited in ten watts of magnitudes more.
Summary of the invention
The objective of the invention is to overcome the deficiency of prior art, thereby the bar-shaped self-frequency-doubling crystal's of a kind of profile pump laser is provided.
The objective of the invention is to realize like this:
Profile pump pole shape self-frequency-doubling crystal laser provided by the invention, it comprises: pole shape self-frequency-doubling crystal, pumping source, laserresonator and cooling heat radiator; Said heat abstractor comprises pumping source heat abstractor and crystal heat abstractor;
Said pumping source is the semiconductor diode pump source that is positioned at said pole shape self-frequency-doubling crystal side, and said pumping source is fixed on the pumping source heat abstractor; The pump light that said pumping source sends gets into from pole shape self-frequency-doubling crystal side and is absorbed;
Laserresonator is made up of the laser mirror A and the laser mirror B that lay respectively at two end face outsides of said pole shape self-frequency-doubling crystal, or is made up of the laser mirror film that directly is plated on two end faces of said pole shape self-frequency-doubling crystal;
Said crystal heat abstractor is provided with cooling liquid inlet and cooling liquid outlet; Cooling fluid is got into by the cooling liquid inlet; Flow through pole shape self-frequency-doubling crystal side, take away the heat that produces in the pole shape self-frequency-doubling crystal, flow out from the cooling liquid outlet again through heat exchange; Said crystal heat abstractor part between pole shape self-frequency-doubling crystal side and pumping source is a translucent construction, sees through with the pump light that seals cooling fluid and pumping source is sent.
Said pole shape self-frequency-doubling crystal is neodymium-doped tetraboric acid yttrium aluminium self-frequency-doubling crystal (being called for short Nd:YAB), mixes ytterbium tetraboric acid yttrium aluminium self-frequency-doubling crystal (being called for short Yb:YAB), neodymium-doped three line borate oxygen gadolinium self-frequency-doubling crystals (being called for short Nd:GdCOB), neodymium-doped three line borate oxygen yttrium self-frequency-doubling crystals (being called for short Nd:YCOB), mixes ytterbium three line borate oxygen gadolinium self-frequency-doubling crystals (being called for short Yb:6dCOB), mixes ytterbium three line borate oxygen yttrium self-frequency-doubling crystals (being called for short Yb:YCOB) or er-doped three line borate oxygen yttrium self-frequency-doubling crystals.
Said bar-shaped self-frequency-doubling crystal's diameter is 2～10mm, and length is 10～80mm, and cutting angle is this self-frequency-doubling crystal's a phase matched direction.
Said pole shape self-frequency-doubling crystal is the crystal of the identical doping content of monoblock, or is that said pure host material is known by industry personage at the crystal of two pure host materials of end face bonding of said pole shape self-frequency-doubling crystal.
Described pumping source is m * n, and m is that pumping source encloses number, and said pumping source encloses number and is meant around m pumping source of the even placement of pole shape self-frequency-doubling crystal one circle; N is the pumping source columns, and said pumping source columns is meant that said pole shape self-frequency-doubling crystal one is sidelong and puts n pumping source; M, the concrete value of n, those of ordinary skill in the art can set up on their own, and for example m is 1,3,5,7 or 9, and n is 1 to 9 integer.
Said laser resonant cavity mirror A and laser resonant cavity mirror B are plano-concave mirror, average mirror or planoconvex lens;
Laser mirror film on the said laser resonant cavity mirror A is the R＞99% pair high-reflecting film for basic frequency laser and double-frequency laser with the laser mirror film that is plated on said pole shape self-frequency-doubling crystal one end face; Laser mirror film on the said laser resonant cavity mirror B is for basic frequency laser R＞99% high-reflecting film with for double-frequency laser T＞90% high transmittance film with the laser mirror film that is plated on the said pole shape self-frequency-doubling crystal other end.
Profile pump pole shape self-frequency-doubling crystal laser of the present invention; Also can comprise the laser pump cavity that is positioned over non-pump light incident position, said pole shape self-frequency-doubling crystal side, with scattering or do not absorb and the pump light that sees through is collected and converge in the said pole shape self-frequency-doubling crystal and absorb once more.
Profile pump pole shape self-frequency-doubling crystal laser of the present invention compared with prior art has following advantage: 1, reduced design complexity.Design is during crystalline size, only need design crystal length according to shg efficiency, and design the abundant absorption that the crystal bar diameter is realized pump light with crossing.
2, improved Maximum pumping.Compare with end pumping, the present invention carries out carrying out from the crystal bar side that m encloses, the pumping of n row, has increased pump light incident position, can improve Maximum pumping.
3, reduced the pumping source cost.Mostly the pumping source of end pumping is the optical fiber Coupling LD, and pumping source of the present invention is lower-cost microchannel or cs encapsulation, under identical pumping power condition, has reduced the cost of manufacture of laser.
Description of drawings
Fig. 13 encloses the structural representation of profile pump pole shape self-frequency-doubling crystal laser of 2 row;
Fig. 2 be vertical crystal axis to cutaway view;
Fig. 3 is the structural representation that embodiment 2 directly directly is plated in chamber mirror A, B crystal end-face.
Fig. 4 be behind the adding laser pump cavity of embodiment 2 vertical crystal axis to cutaway view.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is elaborated.
Fig. 13 encloses the structural representation of profile pump pole shape self-frequency-doubling crystal laser of 2 row; Fig. 2 be vertical crystal axis to cutaway view; Fig. 3 is the structural representation that embodiment 2 directly directly is plated in chamber mirror A, B crystal end-face; Fig. 4 be behind the adding laser pump cavity of embodiment 2 vertical crystal axis to cutaway view; Can know by figure, profile pump pole shape self-frequency-doubling crystal laser provided by the invention of the present invention, it comprises: pole shape self-frequency-doubling crystal 1, pumping source 2, laserresonator and cooling heat radiator; Said heat abstractor comprises pumping source heat abstractor 3 and crystal heat abstractor 5;
Said pumping source is the semiconductor diode pump source that is positioned at said pole shape self-frequency-doubling crystal 1 side, and said pumping source is fixed on the pumping source heat abstractor; The pump light 4 that said pumping source sends gets into from pole shape self-frequency-doubling crystal 1 side and is absorbed;
Laserresonator is made up of the laser mirror A and the laser mirror B that lay respectively at 1 two end face outsides of said pole shape self-frequency-doubling crystal, or is made up of the laser mirror film that directly is plated on 1 two end faces of said pole shape self-frequency-doubling crystal;
Said crystal heat abstractor 5 is provided with cooling liquid inlet and cooling liquid outlet; Cooling fluid is got into by the cooling liquid inlet; Flow through pole shape self-frequency-doubling crystal 1 side, take away the heat that produces in the pole shape self-frequency-doubling crystal 1, flow out from the cooling liquid outlet again through heat exchange; Said crystal heat abstractor 5 part between pole shape self-frequency-doubling crystal 1 side and pumping source 5 is a translucent construction, sees through with the pump light that seals cooling fluid and pumping source is sent.
Said pole shape self-frequency-doubling crystal 1 is neodymium-doped tetraboric acid yttrium aluminium self-frequency-doubling crystal (being called for short Nd:YAB), mixes ytterbium tetraboric acid yttrium aluminium self-frequency-doubling crystal (being called for short Yb:YAB), neodymium-doped three line borate oxygen gadolinium self-frequency-doubling crystals (being called for short Nd:GdCOB), neodymium-doped three line borate oxygen yttrium self-frequency-doubling crystals (being called for short Nd:YCOB), mixes ytterbium three line borate oxygen gadolinium self-frequency-doubling crystals (abbreviation Yb:GdCOB), mixes ytterbium three line borate oxygen yttrium self-frequency-doubling crystals (being called for short Yb:YCOB) or er-doped three line borate oxygen yttrium self-frequency-doubling crystals.
Said bar-shaped self-frequency-doubling crystal's 1 diameter is 2～10mm, and length is 10～80mm, and cutting angle is this self-frequency-doubling crystal's a phase matched direction.
Said pole shape self-frequency-doubling crystal 1 is the crystal of the identical doping content of monoblock, or is that said pure host material is known by industry personage at the crystal of two pure host materials of end face bonding of said pole shape self-frequency-doubling crystal.
Described pumping source is m * n, and m is that pumping source encloses number, and said pumping source encloses number and is meant around m pumping source of the even placement of pole shape self-frequency-doubling crystal 1 one circles; N is the pumping source columns, and said pumping source columns is meant that said pole shape self-frequency-doubling crystal 1 one is sidelong and puts n pumping source; M, the concrete value of n, those of ordinary skill in the art can set up on their own, and for example m is 1,3,5,7 or 9, and n is 1 to 9 integer.
Said laser resonant cavity mirror A and laser resonant cavity mirror B are plano-concave mirror, average mirror or planoconvex lens;
Laser mirror film on the said laser resonant cavity mirror A is the R＞99% pair high-reflecting film for basic frequency laser and double-frequency laser with the laser mirror film that is plated on said pole shape self-frequency-doubling crystal 1 one end faces; Laser mirror film on the said laser resonant cavity mirror B is for basic frequency laser R＞99% high-reflecting film with for double-frequency laser T＞90% high transmittance film with the laser mirror film that is plated on said pole shape self-frequency-doubling crystal 1 other end.
Profile pump pole shape self-frequency-doubling crystal laser of the present invention; Also can comprise the laser pump cavity 6 that is positioned over non-pump light incident position, said pole shape self-frequency-doubling crystal 1 side, with scattering or do not absorb and the pump light that sees through is collected and converge in the said pole shape self-frequency-doubling crystal 1 and absorb once more.
With reference to figure 1 and Fig. 2, present embodiment is made a kind of 3 and is enclosed the self-frequency-doubling laser that (m=3) 2 is listed as (n=2) profile pumps.
In the present embodiment, pole shape self-frequency-doubling crystal 1 adopts a Nd:GdCOB crystal that is of a size of φ 3mm * 20mm, doping content 8at.%, axially is the phase matched direction of 1060nm laser.Pole shape self-frequency-doubling crystal 1 is placed in the crystal heat abstractor 5, and the φ 3mm circular hole of symmetry is left at the two ends of crystal heat abstractor 5, just puts into pole shape self-frequency-doubling crystal 1 back with 704 glue good seals, perhaps adopts O circle pressure type structure with its good seal; Crystal heat abstractor 5 side adopting quartz glass pipes (promptly isolating translucent construction) play the effect that seals cooling fluid and pump light is seen through; Cooling fluid adopts distilled water, and cooling fluid gets into from the cooling liquid inlet, flows through pole shape self-frequency-doubling crystal 1 side, takes away the heat that produces in the pole shape self-frequency-doubling crystal 1 through heat exchange, flows out from the cooling liquid outlet again.
LD output optical maser wavelength is 811nm, adopts the microchannel packing forms; Present embodiment adopts 3 to enclose 2 row profile pump modes, and promptly on pole shape self-frequency-doubling crystal 1 cross-wise direction, three LD are evenly distributed on the crystal bar side; On the crystal bar axial direction, 2 row LD are arranged; Like this, six LD (2-1 only is shown among Fig. 1 and 2,2-2,2-3,2-4) be separately fixed at separately pumping source heat abstractor (3-1 only is shown among Fig. 1 and Fig. 2,3-2,3-3,3-4 dispels the heat on 3-6); The pump light 4 that LD sends gets into pole shape self-frequency-doubling crystal 1 and is absorbed from pole shape self-frequency-doubling crystal 1 side.
Laser mirror A is coated with the two high-reflecting films for 1060nm laser and 530nm laser, as the anti-chamber of height mirror for flat mirror on it; Laser mirror B is the plano-concave mirror, and its concave surface is near pole shape self-frequency-doubling crystal 1 end face, is coated with on the concave surface for high reflection of 1060nm laser and the film that sees through for 530nm laser height, and the plane is coated with the film that sees through for 530nm laser height, as outgoing mirror; Laser mirror A and laser mirror B provide positive feedback, thereby form laser resonance.
The self-frequency-doubling laser of the profile pump that provides for present embodiment is when adding electric current to LD, when making LD output high power laser; Pole shape self-frequency-doubling crystal 1 abundant absorptive pumping light also carries out efficiently radiates heat, has laser gain in the pole shape self-frequency-doubling crystal 1, in the resonant cavity of being made up of laser mirror A and laser mirror B, forms laser generation; Thereby obtain laser output, 1060nm laser vibrates in laserresonator, because pole shape self-frequency-doubling crystal 1 presses the phase matching angle cutting; 1060nm laser power density in the resonant cavity is very high; Through nonlinear optical frequency conversion, convert 530nm laser into, in the output of laser resonant cavity mirror B (outgoing mirror) end.
Embodiment 2, and please with reference to Fig. 3 and Fig. 4, present embodiment and embodiment 1 are similar, and difference is:
1, pole shape self-frequency-doubling crystal 1 adopts a Nd:YCOB crystal that is of a size of φ 4mmx30mm, doping content 8at.%, axially is the phase matched direction of 1060nm laser;
2, laser mirror A and laser mirror B do not adopt independently eyeglass, but directly on 1 two end faces of pole shape self-frequency-doubling crystal, distinguish plated film (to form laser mirror film A and laser mirror film B), form laserresonator, and be as shown in Figure 3;
3, incident place of non-pump light increases laser pump cavity 6 in pole shape self-frequency-doubling crystal 1 side, and is as shown in Figure 4.
Embodiment 3
Present embodiment make a kind of 5 enclose 7 row profile pumps self-frequency-doubling laser.
Present embodiment and embodiment 1 are similar, and difference mainly contains:
1, the pumping source of 7 row is enclosed in employing 5, needs 35 LD pumping sources altogether;
2, pole shape self-frequency-doubling crystal 1 adopts the rod of two φ 3mmx35mm to be bonded to a φ 3mmx70mm crystal bar.
Pole shape self-frequency-doubling crystal 1 heat abstractor 5 sizes are also adjusted according to the change of crystal bar length.Pole shape self-frequency-doubling crystal 1 also can adopt the Nd:GdCOB of the 8at.% of two φ 3mmx30mm to be bonded to a φ 3mmx60mm crystal bar; Two ends are the GdCOB crystal of a φ 3mmx5mm of each bonding again; Form a φ 3mmx70mm crystal bar, be used for better dispelling the heat.
The present invention also can have other various embodiments; Under the situation that does not deviate from spirit of the present invention and essence thereof; Those of ordinary skill in the art work as can make various corresponding changes and modification according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (7)
1. profile pump pole shape self-frequency-doubling crystal laser, it comprises: pole shape self-frequency-doubling crystal, pumping source, laserresonator and cooling heat radiator; Said heat abstractor comprises pumping source heat abstractor and crystal heat abstractor;
Said pumping source is the semiconductor diode pump source that is positioned at said pole shape self-frequency-doubling crystal side, and said pumping source is fixed on the pumping source heat abstractor; The pump light that said pumping source sends gets into from pole shape self-frequency-doubling crystal side and is absorbed;
Laserresonator is made up of the laser mirror A and the laser mirror B that lay respectively at two end face outsides of said pole shape self-frequency-doubling crystal, or is made up of the laser mirror film that directly is plated on two end faces of said pole shape self-frequency-doubling crystal;
Said crystal heat abstractor is provided with cooling liquid inlet and cooling liquid outlet; Cooling fluid is got into by the cooling liquid inlet; Flow through pole shape self-frequency-doubling crystal side, take away the heat that produces in the pole shape self-frequency-doubling crystal, flow out from the cooling liquid outlet again through heat exchange; Said crystal heat abstractor part between pole shape self-frequency-doubling crystal side and pumping source is a translucent construction, sees through with the pump light that seals cooling fluid and pumping source is sent.
2. profile pump pole shape self-frequency-doubling crystal laser according to claim 1; It is characterized in that said pole shape self-frequency-doubling crystal is neodymium-doped tetraboric acid yttrium aluminium self-frequency-doubling crystal, mixes ytterbium tetraboric acid yttrium aluminium self-frequency-doubling crystal, neodymium-doped three line borate oxygen gadolinium self-frequency-doubling crystals, neodymium-doped three line borate oxygen yttrium self-frequency-doubling crystals, mixes ytterbium three line borate oxygen gadolinium self-frequency-doubling crystals, mixes ytterbium three line borate oxygen yttrium self-frequency-doubling crystals or er-doped three line borate oxygen yttrium self-frequency-doubling crystals.
3. profile pump pole shape self-frequency-doubling crystal laser according to claim 1 is characterized in that said bar-shaped self-frequency-doubling crystal's diameter is 2～10mm, and length is 10～80mm, and cutting angle is this self-frequency-doubling crystal's a phase matched direction.
4. the bar-shaped self-frequency-doubling crystal's laser in the circular Pu of side according to claim 2 pump; It is characterized in that; Said pole shape self-frequency-doubling crystal is the crystal of the identical doping content of monoblock, or is the crystal at two pure host materials of end face bonding of said pole shape self-frequency-doubling crystal.
5. profile pump pole shape self-frequency-doubling crystal laser according to claim 1 is characterized in that, described pumping source is m * n, and m is that pumping source encloses number, and said pumping source encloses number and is meant around m pumping source of the even placement of pole shape self-frequency-doubling crystal one circle; N is the pumping source columns, and said pumping source columns is meant that said pole shape self-frequency-doubling crystal one is sidelong and puts n pumping source.
6. profile pump pole shape self-frequency-doubling crystal laser according to claim 1 is characterized in that said laser resonant cavity mirror A and laser resonant cavity mirror B are plano-concave mirror, average mirror or planoconvex lens;
Laser mirror film on the said laser resonant cavity mirror A is the R＞99% pair high-reflecting film for basic frequency laser and double-frequency laser with the laser mirror film that is plated on said pole shape self-frequency-doubling crystal one end face; Laser mirror film on the said laser resonant cavity mirror B is for basic frequency laser R＞99% high-reflecting film with for double-frequency laser T＞90% high transmittance film with the laser mirror film that is plated on the said pole shape self-frequency-doubling crystal other end.
7. profile pump pole shape self-frequency-doubling crystal laser according to claim 1; It is characterized in that; Also comprise the laser pump cavity that is positioned over non-pump light incident position, said pole shape self-frequency-doubling crystal side, with scattering or do not absorb and the pump light that sees through is collected and converge in the said pole shape self-frequency-doubling crystal and absorb once more.
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| CN2012100085640A CN102593706A (en) | 2012-01-12 | 2012-01-12 | Side pump circular rod shaped self-frequency-doubled crystal laser |
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| CN2012100085640A CN102593706A (en) | 2012-01-12 | 2012-01-12 | Side pump circular rod shaped self-frequency-doubled crystal laser |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103490275A (en) * | 2013-09-24 | 2014-01-01 | 中国科学院福建物质结构研究所 | 1.5-1.6 micron wave band based on bonding crystal and frequency conversion laser device thereof |
| CN103872571A (en) * | 2012-12-14 | 2014-06-18 | 中国科学院理化技术研究所 | Full solid state laser device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2598215Y (en) * | 2003-02-21 | 2004-01-07 | 华中科技大学 | Laser deode solid laser side pumping module |
| CN102044834A (en) * | 2010-11-17 | 2011-05-04 | 山东大学 | Self mode-locked laser of nonlinear mirror |
-
2012
- 2012-01-12 CN CN2012100085640A patent/CN102593706A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2598215Y (en) * | 2003-02-21 | 2004-01-07 | 华中科技大学 | Laser deode solid laser side pumping module |
| CN102044834A (en) * | 2010-11-17 | 2011-05-04 | 山东大学 | Self mode-locked laser of nonlinear mirror |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103872571A (en) * | 2012-12-14 | 2014-06-18 | 中国科学院理化技术研究所 | Full solid state laser device |
| CN103490275A (en) * | 2013-09-24 | 2014-01-01 | 中国科学院福建物质结构研究所 | 1.5-1.6 micron wave band based on bonding crystal and frequency conversion laser device thereof |
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Application publication date: 20120718 |