CN103441420B - Violet laser of a kind of noncritical phase matching frequency multiplication and preparation method thereof - Google Patents
Violet laser of a kind of noncritical phase matching frequency multiplication and preparation method thereof Download PDFInfo
- Publication number
- CN103441420B CN103441420B CN201310441354.5A CN201310441354A CN103441420B CN 103441420 B CN103441420 B CN 103441420B CN 201310441354 A CN201310441354 A CN 201310441354A CN 103441420 B CN103441420 B CN 103441420B
- Authority
- CN
- China
- Prior art keywords
- crystal
- laser
- lacob
- frequency
- phase matching
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000002360 preparation method Methods 0.000 title claims description 25
- 239000013078 crystal Substances 0.000 claims abstract description 213
- 230000003287 optical effect Effects 0.000 claims abstract description 35
- 238000012545 processing Methods 0.000 claims abstract description 16
- 238000005516 engineering process Methods 0.000 claims abstract description 14
- 239000004065 semiconductor Substances 0.000 claims abstract description 8
- 239000007787 solid Substances 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 24
- 238000001914 filtration Methods 0.000 claims description 10
- 238000005498 polishing Methods 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 abstract description 9
- 230000008901 benefit Effects 0.000 abstract description 8
- 230000009466 transformation Effects 0.000 abstract description 5
- UUKGTTBASALNJZ-UHFFFAOYSA-N O.B([O-])([O-])[O-].[La+3] Chemical compound O.B([O-])([O-])[O-].[La+3] UUKGTTBASALNJZ-UHFFFAOYSA-N 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 2
- 244000172533 Viola sororia Species 0.000 description 39
- 235000005811 Viola adunca Nutrition 0.000 description 8
- 240000009038 Viola odorata Species 0.000 description 8
- 235000013487 Viola odorata Nutrition 0.000 description 8
- 235000002254 Viola papilionacea Nutrition 0.000 description 8
- 238000001816 cooling Methods 0.000 description 7
- 238000002050 diffraction method Methods 0.000 description 7
- 238000012538 light obscuration Methods 0.000 description 7
- 238000000634 powder X-ray diffraction Methods 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 239000012466 permeate Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 4
- 230000000737 periodic effect Effects 0.000 description 4
- 239000000835 fiber Substances 0.000 description 3
- 230000005684 electric field Effects 0.000 description 2
- GQYHUHYESMUTHG-UHFFFAOYSA-N lithium niobate Chemical compound [Li+].[O-][Nb](=O)=O GQYHUHYESMUTHG-UHFFFAOYSA-N 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- RIUWBIIVUYSTCN-UHFFFAOYSA-N trilithium borate Chemical class [Li+].[Li+].[Li+].[O-]B([O-])[O-] RIUWBIIVUYSTCN-UHFFFAOYSA-N 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000000960 laser cooling Methods 0.000 description 1
- 238000007648 laser printing Methods 0.000 description 1
- 238000001307 laser spectroscopy Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Abstract
The invention provides a kind of violet laser of noncritical phase matching frequency multiplication.Comprise LaCOB frequency-doubling crystal.Described LaCOB is line borate oxygen lanthanum (LaCa
4o (BO
3)
3abbreviation.Utilize the centre wavelength of its noncritical phase matching direct frequency doubling commercialization to be semiconductor (LD) laser of 808 ± 5nm, obtain the high power violet laser that centre wavelength 405 ~ 407nm exports, purple light solid state laser.This laser has the advantages such as transformation efficiency is high, cost is low, compact conformation, miniaturization, reliability is high, the life-span is long.The structure of the purple laser of the present invention is simple, and stable performance, conversion ratio is high.Because the double-frequency material LaCOB crystal that this laser adopts is along principal-axes coordinate processing, the noncritical phase matching technology of application LaCOB crystal, can increase laser stability, improve efficiency of laser.Other purple laser does not utilize nonlinear optical crystal noncritical phase matching technology direct frequency doubling LD to obtain.
Description
Technical field
The present invention relates to violet laser of a kind of noncritical phase matching frequency multiplication and preparation method thereof, belong to the technical field of laser and device.
Background technology
Full solid-state bluish violet light laser, because it is in the extensive use in Laser Biomedicine, laser color display, the storage of laser high density data, laser spectroscopy, laser printing, Laser Underwater imaging and the field such as communication, laser cooling, enjoys people to pay attention in recent years.At present, the approach realizing full solid-state bluish violet look LASER Light Source mainly contains three kinds: (1) directly launches the laser diode of blue light; (2) LD pumped all-solid-state laser is again by blue-violet laser that nonlinear optics means obtain; (3) blue-violet light source of direct frequency doubling LD.The semiconductor laser of direct transmitting blue light, have that structure is simple, easy to use, electrical-optical conversion efficiency advantages of higher, but the defect due to semi-conducting material itself is difficult to overcome, the development making blue laser diode is relatively slow, and practical between also have a segment distance.LD pumped all-solid-state laser is exported as the methods such as frequency multiplication and frequency obtain bluish violet color laser by nonlinear optical frequency conversion again, and intermediate link is many, complicated integral structure, and reliability is relatively poor.Obtain bluish violet color laser by direct frequency doubling LD and have that structure is simple, reliability is high, cost is low, conversion ratio is high, high light-light conversion efficiency can be realized.Commercial LD technology develop rapidly recent years, its beam quality and power output are all improved, and launch live width and compressed, various novel frequency-doubling crystal quality improves constantly, and the blue-violet light source technology of direct frequency doubling LD obtains develop rapidly.Thisly at present the infrared laser of LD pumping exported by second harmonic (SHG) technology that direct frequency doubling obtains bluish violet color laser and obtain application, but wherein crucial frequency-doubling crystal is limited.Mainly contain the output that the crystal such as three lithium borates (LBO), periodic polarized lithium niobate (PPLN) and periodic polarized KTP (PPKTP) can realize blue-violet laser in the market, but it is larger that crystal optics main shaft is departed from its phase matched direction, therefore bbo crystal fundamental frequency light and frequency doubled light deviation angle large, fundamental frequency light allows that angle is little, can not utilize and obtain high conversion ratio compared with long crystal; PPLN and PPKTP crystal growth is slow, and crystal pro cessing and technology of preparing complexity, fundamental frequency light allows that angle is little.
Summary of the invention
For the deficiencies in the prior art, the invention provides a kind of violet laser of noncritical phase matching frequency multiplication.Laser of the present invention, for utilizing its noncritical phase matching technology direct frequency doubling commercial semiconductor lasers (LD, centre wavelength 808 ± 5nm), obtains all solid laser that purple light (centre wavelength 405 ~ 407nm) exports.This violet laser has that structure is simple, easy to use, good stability, cost are low, the life-span is long, volume is little, conversion ratio advantages of higher, is conducive to blue-violet laser development and application.
The present invention also provides a kind of preparation method of violet laser of above-mentioned noncritical phase matching frequency multiplication.
Technical scheme of the present invention is as follows:
Professional technicality:
1. phase matched (PM)
Fundamental frequency light injects nonlinear optical crystal, produces secondary polarized wave or claim frequency multiplication light wave in each place of light path.Where optical frequency electric field passes in crystal, second harmonic will be produced there, due to the dispersion of crystal refractive index, the propagation velocity of the second harmonic that second harmonic is launched is different from incident fundamental frequency velocity of wave propagation, the process that the second harmonic that different parts not in the same time in crystal is launched is propagated in crystal will interfere phenomenon, and relevant result decides the intensity exporting light.Expect that stronger second harmonic exports, the necessary position of the second harmonic that different parts is not launched in crystal is in the same time consistent, reach this purpose, just require that incident fundamental frequency light is identical in the propagation velocity of crystal with second harmonic in the propagation velocity of crystal, thus obtain stronger frequency doubled light output, the implication of phase matched that Here it is.
2. critical phase matched (CPM) noncritical phase matching (NCPM)
Noncritical phase matching (NCPM) refers to the axial phase matched of vertical light to single shaft crystalline substance, and refer to the phase matched along principal-axes coordinate direction to biaxal crystal, the phase matched of other situation is called critical phase matched (CPM).NCPM with CPM compares to be had deviation angle and is zero, allows the advantage that angle is large, is thus convenient to utilize comparatively long crystal to obtain high conversion efficiency.
3.LaCOB frequency-doubling crystal refers at this fritter crystal processed along frequency multiplication direction, and LaCOB crystal is not yet along the bulky crystal of frequency multiplication direction processing.
Summary of the invention
The present invention relates to a kind of violet laser of noncritical phase matching frequency multiplication, comprise LaCOB frequency-doubling crystal.Described LaCOB is line borate oxygen lanthanum (LaCa
4o (BO
3)
3abbreviation.Utilize the centre wavelength of its noncritical phase matching direct frequency doubling commercialization to be semiconductor (LD) laser of 808 ± 5nm, obtain the high power violet laser that centre wavelength 405 ~ 407nm exports, purple light solid state laser.This laser has the advantages such as transformation efficiency is high, cost is low, compact conformation, miniaturization, reliability is high, the life-span is long.
Current business architecture wavelength is the semiconductor laser technology comparative maturity of 808nm ± 5nm, volume is little, lightweight, power consumption is little, be convenient to and coupling fiber, power output is more and more higher, directly can carry out intensity modulated and the output wavelength by temperature control change LD.Utilize the commercial LD of the NCPM technology direct frequency doubling of crystal, higher transformation efficiency can be obtained, more stable laser, the non-critical phase matching wavelength of light is led at vertical Z X primary flat near 813nm along Y-axis by calculating line borate oxygen lanthanum (LaCOB) crystal, and test with optics parameter oscillation laser (OPO), find all to observe frequency multiplication purple light under fundamental frequency light 811nm ~ 815nm incidence, the outgoing wavelength of business architecture wavelength 808nm ± 5nm semiconductor laser is transferred to 811nm ~ 813nm by method of temperature-control by, by designing suitable chamber mirror or crystal being led to light end face coating, LaCOB crystal noncritical phase matching direct frequency doubling LD can be realized at room temperature 20 DEG C, obtain 405 ~ 407nm purple light laser.
Detailed Description Of The Invention
A kind of violet laser of noncritical phase matching frequency multiplication, comprise LD and the LaCOB frequency-doubling crystal that center wavelength of light is 808 ± 5nm, the concrete corner cut of described LaCOB frequency-doubling crystal is (90 °, 90 °), above-mentioned corner cut follows crystallographic international practice, previous angle is the angle of Z axis in space cut direction and space coordinates, a rear angle is the projection of space cut direction in space coordinates in XY plane and the angle of X-axis, and wherein X-axis, Y-axis and Z axis are three-dimensional reference axis.Under the room temperature of 20 DEG C, this LaCOB frequency-doubling crystal along the theoretical noncritical phase matching wavelength of Y direction near 813nm.Violet laser designed by the present invention LaCOB direct frequency doubling commercialization 808 ± 5nmLD obtains, and centre wavelength, near 405-407nm, is conducive to development and the industrialization of direct frequency doubling LD bluish violet light laser.
Preferred according to the present invention, described LD is pulse running LD or the LD that operates continuously, is 811nm-813nm by the tuning center wavelength of light of being transferred to out of temperature control technique.
Preferred according to the present invention, the preparation method of described LaCOB frequency-doubling crystal: by LaCOB crystal along the processing of optical main axis XYZ primary flat, XZ twin polishing.Consider crystal orientation and mismachining tolerance, the corner cut of crystal is (90 ± 2 °, 90 ± 2 °).Here follow crystallographic international practice, previous angle is the angle of space cut direction and Z axis, and a rear angle is the projection of space cut direction in XY plane and the angle of X-axis.
Preferred according to the present invention, the preparation method of described LaCOB frequency-doubling crystal: by LaCOB crystal along the processing of XYZ primary flat, XZ mirror polish, it is the ZX primary flat that the laser vertical of 811-813nm is incident to LaCOB frequency-doubling crystal that LD sends wavelength, leads to light along Y-axis.In the present invention, to the XZ mirror polish of LaCOB frequency-doubling crystal, the length that can increase LaCOB frequency-doubling crystal Y-axis reaches 20 ~ 30mm, improves transformation efficiency.
Preferred according to the present invention, the colour filter of filtering fundamental frequency light is set at the exit end of described LaCOB frequency-doubling crystal, have to wavelength be the violet laser of 405-407nm.
Preferred according to the present invention, the preparation method of described LaCOB frequency-doubling crystal: LaCOB crystal is processed along XYZ primary flat, XZ mirror polish, the anti-reflection wavelength of the plane of incidence of described LaCOB frequency-doubling crystal be the laser of 811-815nm, high anti-wavelength is the laser of 405-408nm; The anti-reflection wavelength of exit facet of described LaCOB frequency-doubling crystal be the laser of 405-408nm, high anti-wavelength is the laser of 811-815nm.The advantage herein designed is, improves the performance of violet laser of the present invention.
Preferred according to the present invention, realizing anti-reflection and that height is anti-method at the plane of incidence of described LaCOB frequency-doubling crystal is: plated film on the described plane of incidence: 811-815nm anti-reflection film and 405-408nm high-reflecting film; Exit facet plated film at described LaCOB frequency-doubling crystal: 811-815nm high-reflecting film and 405-408nm anti-reflection film.
Preferred according to the present invention, realizing anti-reflection and that height is anti-method at the plane of incidence of described LaCOB frequency-doubling crystal is: arrange in described plane of incidence front portion that 811-815nm is anti-reflection, the high anti-lens of 405-408nm; High anti-, 405-408nm the is anti-reflection mirror of 811-815nm is set at exit facet rear portion.
The invention has the advantages that:
1, the structure of the purple laser of the present invention is simple, and stable performance, conversion ratio is high.Because the double-frequency material LaCOB crystal that this laser adopts is along principal-axes coordinate processing, the noncritical phase matching technology of application LaCOB crystal, can increase laser stability, improve efficiency of laser.Other purple laser does not utilize nonlinear optical crystal noncritical phase matching technology direct frequency doubling LD to obtain.
2, the purple laser of the present invention adopts direct frequency doubling business architecture wavelength to be that the LD of 808 ± 5nm obtains, output wavelength 405-407nm is shorter than general blue-violet laser, the LD technology maturation of commercial 808 ± 5nm, power is high, price is low, and the purple laser cost of the present invention is lower than other blue-violet laser.
3, it is slow that frequency-doubling crystal blue-violet laser market adopted mainly contains the crystal growth such as three lithium borates (LBO), periodic polarized lithium niobate (PPLN) and periodic polarized KTP (PPKTP), and processed complex, cost is high.Just large size single crystal can be obtained in the LaCOB crystal Czochralski grown short time that laser of the present invention adopts, directly after spindle processing, do not need external electric field poling just can use, LaCOB hardness of crystals is large, stable in properties, not easily deliquescence, the therefore purple laser long service life of the present invention.
Accompanying drawing explanation
Fig. 1, LaCOB frequency-doubling crystal crystallographic axes a, b, c, principal-axes coordinate X, Y, Z and crystal face (-201), (010), the structural representation of (202);
Fig. 2, LaCOB frequency-doubling crystal is along the machining sketch chart of principal-axes coordinate;
The fiber-coupled LD of Fig. 3, LaCOB crystal direct frequency doubling output wavelength 811nm, LaCOB crystal both sides plated film;
The fiber-coupled LD of Fig. 4, LaCOB crystal direct frequency doubling output wavelength 811nm, places suitable lens before and after LaCOB crystal.
Embodiment:
Below in conjunction with embodiment and Figure of description, the present invention is described in detail, but is not limited thereto.
Embodiment 1,
A kind of violet laser of noncritical phase matching frequency multiplication, comprise LD and the LaCOB frequency-doubling crystal that center wavelength of light is 808 ± 5nm, the concrete corner cut of described LaCOB frequency-doubling crystal is (90 °, 90 °), above-mentioned corner cut follows crystallographic international practice, previous angle is the angle of Z axis in space cut direction and space coordinates, a rear angle is the projection of space cut direction in space coordinates in XY plane and the angle of X-axis, and wherein X-axis, Y-axis and Z axis are three-dimensional reference axis.Under the room temperature of 20 DEG C, this LaCOB frequency-doubling crystal along the theoretical noncritical phase matching wavelength of Y direction near 813nm.Violet laser designed by the present invention LaCOB direct frequency doubling commercialization 808 ± 5nmLD obtains, and centre wavelength, near 405-407nm, is conducive to development and the industrialization of direct frequency doubling LD bluish violet light laser.Described LD is pulse running LD or the LD that operates continuously, is 811nm-813nm by the tuning center wavelength of light of being transferred to out of temperature control technique.
Embodiment 2,
The violet laser of a kind of noncritical phase matching frequency multiplication as described in Example 1, its difference is, arranges the colour filter of filtering fundamental frequency light at the exit end of described LaCOB frequency-doubling crystal, have to wavelength be the violet laser of 405-407nm.
Embodiment 3,
The violet laser of a kind of noncritical phase matching frequency multiplication as described in Example 1, its difference is, the preparation method of described LaCOB frequency-doubling crystal: LaCOB crystal is processed along XYZ primary flat, XZ mirror polish, the anti-reflection wavelength of the plane of incidence of described LaCOB frequency-doubling crystal be the laser of 811-815nm, high anti-wavelength is the laser of 405-408nm; The anti-reflection wavelength of exit facet of described LaCOB frequency-doubling crystal be the laser of 405-408nm, high anti-wavelength is the laser of 811-815nm.The advantage herein designed is, improves the performance of violet laser of the present invention.
Realizing anti-reflection and that height is anti-method at the plane of incidence of described LaCOB frequency-doubling crystal is: plated film on the described plane of incidence: 811-815nm anti-reflection film and 405-408nm high-reflecting film; Exit facet plated film at described LaCOB frequency-doubling crystal: 811-815nm high-reflecting film and 405-408nm anti-reflection film.
Embodiment 4,
The violet laser of a kind of noncritical phase matching frequency multiplication as described in Example 1, its difference is, the method realizing anti-reflection and height anti-at the plane of incidence of described LaCOB frequency-doubling crystal is: arrange in described plane of incidence front portion that 811-815nm is anti-reflection, the high anti-lens of 405-408nm; High anti-, 405-408nm the is anti-reflection mirror of 811-815nm is set at exit facet rear portion.
Embodiment 5,
The preparation method of the violet laser of a kind of noncritical phase matching frequency multiplication as described in Example 1, comprise the preparation method of LaCOB frequency-doubling crystal: processed along XYZ primary flat by LaCOB crystal, XZ mirror polish, it is the ZX primary flat that the laser vertical of 811-813nm is incident to LaCOB frequency-doubling crystal that LD sends wavelength, leads to light along Y-axis.In the present invention, to the XZ mirror polish of LaCOB frequency-doubling crystal, the length that can increase LaCOB frequency-doubling crystal Y-axis reaches 20 ~ 30mm, improves transformation efficiency.Specifically as follows to the processing of LaCOB frequency-doubling crystal:
(1) after getting LaCOB crystal pulverize, carry out structure elucidation by powder x-ray diffraction method, obtaining LaCOB cell parameter is: a=0.8168nm, b=1.6081nm, c=0.3630nm, β=101.2 ± 0.1 °, namely the angle of crystallographic axes a and c is 101.2 ± 0.1 °.LaCOB crystal is made on X-ray orientation device (-201) and (010) crystal face, angle of diffraction is respectively 30.9 °, 5.5 °, and with this crystal face for datum level, determine that the angle of (-201) crystal face and crystallography c-axis is 57.7 ± 1 °; Adopt petrographic microscope, application interfere light extinction method determine LaCOB crystal crystallographic axes (a, b and c) and the angle of optical main axis (X, Y and Z) be (a, Z)=24.8 ± 1 °, (c, X)=13.4 ± 1 °; Crystal axis b and optical main axis Y is reverse;
(2) the optical main axis XYZ that (1) LaCOB crystal in step is determined is processed, consider that the corner cut of crystal orientation processing time error frequency-doubling crystal device is (90 ± 2 ° 90 ± 2 °).Crystal prototype is of a size of: i*x*imm
3(x represents Y-direction length, 5≤x≤30; 4≤i≤10), by two-sided for XZ face finishing polish, wherein polishing degree is within 30 ', and the length along Y optical direction is 5 ~ 10mm.I=5 herein.
(3) the LaCOB crystal prototype that step (2) obtains is put on special crystal holder, adopts constant temperature water tank cooling to control the temperature of crystal at about 20 DEG C.
(4) the LD pumping exported continuously is adopted, LD wavelength is transferred near 811nm ~ 813nm by temperature control, adjustment chucking position, makes LD pump light pass into along crystal Y direction, exports by the violet laser that colour filter filtration fundamental frequency light just can obtain near 405 ~ 407nm.
Embodiment 6,
The preparation method of the violet laser of a kind of noncritical phase matching frequency multiplication as described in Example 1, comprises the preparation method of LaCOB frequency-doubling crystal:
(1) after getting LaCOB crystal pulverize, carry out structure elucidation by powder x-ray diffraction method, obtaining LaCOB cell parameter is: a=0.8168nm, b=1.6081nm, c=0.3630nm, β=101.2 ± 0.1 °, namely the angle of crystallographic axes a and c is 101.2 ± 0.1 °.LaCOB crystal is made on X-ray orientation device (202) and (010) crystal face, angle of diffraction is respectively 62.45 °, 5.5 °, and with this crystal face for datum level, determine that the angle of (202) crystal face and crystallography c-axis is 24 ± 1 °; Adopt petrographic microscope, application interfere light extinction method determine LaCOB crystal crystallographic axes (a, b and c) and the angle of optical main axis (X, Y and Z) be (a, Z)=24.8 ± 1 °, (c, X)=13.4 ± 1 °; Crystal axis b and optical main axis Y is reverse.
(2) the optical main axis XYZ that LaCOB crystal reference in step (1) is determined is processed, consider that the corner cut of crystal orientation processing time error frequency-doubling crystal device is (90 ± 2 ° 90 ± 2 °).Crystal prototype is of a size of: i*x*imm
3(x represents Y-direction length, 5≤x≤30; 4≤i≤10), by two-sided for XZ face finishing polish, wherein polishing degree is within 30 ', and the length along Y optical direction is 10 ~ 20mm.I=5 herein.
(3) step (2) being obtained LaCOB crystal is put on special crystal holder, adopts constant temperature water tank cooling to control the temperature of crystal at about 20 DEG C.
(4) the LD drive manner of laser of the present invention is that pulse exports, and the wavelength of LD is transferred near 811nm ~ 813nm by temperature control, leads to light along crystal Y direction, just can obtain the violet laser near 405 ~ 407nm by colour filter filtration fundamental frequency light.
Embodiment 7,
The preparation method of the violet laser of a kind of noncritical phase matching frequency multiplication as described in Example 1, comprises the preparation method of LaCOB frequency-doubling crystal:
(1) after getting LaCOB crystal pulverize, carry out structure elucidation by powder x-ray diffraction method, obtaining LaCOB cell parameter is: a=0.8168nm, b=1.6081nm, c=0.3630nm, β=101.2 ± 0.1 °, namely the angle of crystallographic axes a and c is 101.2 ± 0.1 °.LaCOB crystal is made on X-ray orientation device (-201) and (010) crystal face, angle of diffraction is respectively 30.9 °, 5.5 °, and with this crystal face for datum level, determine that the angle of (-201) crystal face and crystallography c-axis is 57.7 ± 1 °; Adopt petrographic microscope, application interfere light extinction method determine LaCOB crystal crystallographic axes (a, b and c) and the angle of optical main axis (X, Y and Z) be (a, Z)=24.8 ± 1 °, (c, X)=13.4 ± 1 °; Crystal axis b and optical main axis Y is reverse.
(2) the optical main axis XYZ that LaCOB crystal reference in step (1) is determined is processed, consider that the corner cut of crystal orientation processing time error frequency-doubling crystal device is (90 ± 2 ° 90 ± 2 °).Crystal prototype is of a size of: i*x*imm
3(x represents Y-direction length, 5≤x≤30; 4≤i≤10), by two-sided for XZ face finishing polish, wherein polishing degree is within 30 ', and the length along Y optical direction is 5 ~ 30mm.I=5 herein.
(3) LaCOB crystal ZX facet coatings step (2) obtained, high anti-at the anti-reflection 405-408nm of plane of incidence plated film 811-815nm, at the high anti-405-408nm component permeate of exit facet plated film 811-815nm.
(4) step (3) being obtained LaCOB crystal is put on suitable crystal holder, adopts constant temperature water tank cooling to control the temperature of crystal at about 20 DEG C.
(5) the LD drive manner of laser of the present invention is continuous output, and the wavelength of LD is transferred near 811nm ~ 813nm by temperature control, leads to light along crystal Y direction, just can obtain the violet laser near 405 ~ 407nm by colour filter filtration fundamental frequency light.
Embodiment 8,
The preparation method of the violet laser of a kind of noncritical phase matching frequency multiplication as described in Example 1, comprises the preparation method of LaCOB frequency-doubling crystal:
(1) after getting LaCOB crystal pulverize, carry out structure elucidation by powder x-ray diffraction method, obtaining LaCOB cell parameter is: a=0.8168nm, b=1.6081nm, c=0.3630nm, β=101.2 ± 0.1 °, namely the angle of crystallographic axes a and c is 101.2 ± 0.1 °.LaCOB crystal is made on X-ray orientation device (202) and (010) crystal face, angle of diffraction is respectively 62.45 °, 5.5 °, and with this crystal face for datum level, determine that the angle of (202) crystal face and crystallography c-axis is 24 ± 1 °; Adopt petrographic microscope, application interfere light extinction method determine LaCOB crystal crystallographic axes (a, b and c) and the angle of optical main axis (X, Y and Z) be (a, Z)=24.8 ± 1 °, (c, X)=13.4 ± 1 °; Crystal axis b and optical main axis Y is reverse.
(2) the optical main axis XYZ that LaCOB crystal reference in step (1) is determined is processed, consider that the corner cut of crystal orientation processing time error frequency-doubling crystal device is (90 ± 2 ° 90 ± 2 °).Crystal prototype is of a size of: i*x*imm
3(x represents Y-direction length, 5≤x≤30; 4≤i≤10), by two-sided for XZ face finishing polish, wherein polishing degree is within 30 ', and the length along Y optical direction is 10 ~ 20mm.I=5 herein.
(3) LaCOB crystal ZX facet coatings step (2) obtained, high anti-at the anti-reflection 405-408nm of plane of incidence plated film 811-815nm, at the high anti-405-408nm component permeate of exit facet plated film 811-815nm.
(4) step (3) being obtained LaCOB crystal is put on suitable crystal holder, adopts constant temperature water tank cooling to control the temperature of crystal at about 20 DEG C.
(5) the LD drive manner of laser of the present invention is that pulse exports, and the wavelength of LD is transferred near 811nm ~ 813nm by temperature control, leads to light along crystal Y direction, just can obtain the violet laser near 405 ~ 407nm by colour filter filtration fundamental frequency light.
Embodiment 9,
The preparation method of the violet laser of a kind of noncritical phase matching frequency multiplication as described in Example 1, comprises the preparation method of LaCOB frequency-doubling crystal:
(1) after getting LaCOB crystal pulverize, carry out structure elucidation by powder x-ray diffraction method, obtaining LaCOB cell parameter is: a=0.8168nm, b=1.6081nm, c=0.3630nm, β=101.2 ± 0.1 °, namely the angle of crystallographic axes a and c is 101.2 ± 0.1 °.LaCOB crystal is made on X-ray orientation device (-201) and (010) crystal face, angle of diffraction is respectively 30.9 °, 5.5 °, and with this crystal face for datum level, determine that the angle of (-201) crystal face and crystallography c-axis is 57.7 ± 1 °; Application petrographic microscope, adopt interfere light extinction method determine LaCOB crystal crystallographic axes (a, b and c) and the angle of optical main axis (X, Y and Z) be (a, Z)=24.8 ± 1 °, (c, X)=13.4 ± 1 °; Crystal axis b and optical main axis Y is reverse.
(2) the optical main axis XYZ that LaCOB crystal reference in step (1) is determined is processed, consider that the corner cut of crystal orientation processing time error frequency-doubling crystal device is (90 ± 2 ° 90 ± 2 °).Crystal prototype is of a size of: i*x*imm
3(x represents Y-direction length, 5≤x≤30; 4≤i≤10), by two-sided for XZ face finishing polish, wherein polishing degree is within 30 ', and the length along Y optical direction is 5 ~ 30mm.I=5 herein.
(3) LaCOB crystal ZX facet coatings step (2) obtained, high anti-at the anti-reflection 405-408nm of plane of incidence plated film 811-815nm, then LaCOB crystal is put on suitable crystal holder, adopt constant temperature water tank cooling to control the temperature of crystal at about 20 DEG C, after LaCOB crystal exit face, place the lens of the high anti-405-408nm component permeate of a 811-815nm.
(4) the LD drive manner of laser of the present invention is continuous output, and the wavelength of LD is transferred near 811nm ~ 813nm by temperature control, leads to light along crystal Y direction, just can obtain the violet laser near 405 ~ 407nm by colour filter filtration fundamental frequency light.
Embodiment 10,
The preparation method of the violet laser of a kind of noncritical phase matching frequency multiplication as described in Example 1, comprises the preparation method of LaCOB frequency-doubling crystal:
(1) after getting LaCOB crystal pulverize, carry out structure elucidation by powder x-ray diffraction method, obtaining LaCOB cell parameter is: a=0.8168nm, b=1.6081nm, c=0.3630nm, β=101.2 ± 0.1 °, namely the angle of crystallographic axes a and c is 101.2 ± 0.1 °.LaCOB crystal is made on X-ray orientation device (-201) and (010) crystal face, angle of diffraction is respectively 30.9 °, 5.5 °, and with this crystal face for datum level, determine that the angle of (-201) crystal face and crystallography c-axis is 57.7 ± 1 °; Application petrographic microscope, application interfere light extinction method determine LaCOB crystal crystallographic axes (a, b and c) and the angle of optical main axis (X, Y and Z) be (a, Z)=24.8 ± 1 °, (c, X)=13.4 ± 1 °; Crystal axis b and optical main axis Y is reverse.
(2) the optical main axis XYZ that LaCOB crystal reference in step (1) is determined is processed, consider that the corner cut of crystal orientation processing time error frequency-doubling crystal device is (90 ± 2 ° 90 ± 2 °).Crystal prototype is of a size of: i*x*imm
3(x represents Y-direction length, 5≤x≤30; 4≤i≤10), by two-sided for XZ face finishing polish, wherein polishing degree is within 30 ', and the length along Y optical direction is 5 ~ 30mm.I=5 herein.
(3) step (2) being obtained LaCOB crystal is put on suitable crystal holder, adopts constant temperature water tank cooling to control the temperature of crystal at about 20 DEG C.
(4) the LD drive manner of laser of the present invention is continuous output, the wavelength of LD is transferred near 811nm ~ 813nm by temperature control, light is led to along crystal Y direction, the high anti-lens of an anti-reflection 405-408nm of 811-815nm are placed before the crystal plane of incidence, place the lens of the high anti-405-408nm component permeate of a 811-815nm at exit facet, just can obtain the violet laser near 405 ~ 407nm by colour filter filtration fundamental frequency light.
Embodiment 11,
The preparation method of the violet laser of a kind of noncritical phase matching frequency multiplication as described in Example 1, comprises the preparation method of LaCOB frequency-doubling crystal:
(1) after getting LaCOB crystal pulverize, carry out structure elucidation by powder x-ray diffraction method, obtaining LaCOB cell parameter is: a=0.8168nm, b=1.6081nm, c=0.3630nm, β=101.2 ± 0.1 °, namely the angle of crystallographic axes a and c is 101.2 ± 0.1 °.LaCOB crystal is made on X-ray orientation device (202) and (010) crystal face, angle of diffraction is respectively 62.45 °, 5.5 °, and with this crystal face for datum level, determine that the angle of (202) crystal face and crystallography c-axis is 24 ± 1 °; Adopt petrographic microscope, application interfere light extinction method determine LaCOB crystal crystallographic axes (a, b and c) and the angle of optical main axis (X, Y and Z) be (a, Z)=24.8 ± 1 °, (c, X)=13.4 ± 1 °; Crystal axis b and optical main axis Y is reverse.
(2) the optical main axis XYZ that LaCOB crystal reference in step (1) is determined is processed, consider that the corner cut of crystal orientation processing time error frequency-doubling crystal device is (90 ± 2 ° 90 ± 2 °).Crystal prototype is of a size of: i*x*imm
3(x represents Y-direction length, 5≤x≤30; 4≤i≤10), by two-sided for XZ face finishing polish, wherein polishing degree is within 30 ', and the length along Y optical direction is 10 ~ 20mm, i=8 described herein.
(3) step (2) being obtained LaCOB crystal is put on suitable crystal holder, adopts constant temperature water tank cooling to control the temperature of crystal at about 20 DEG C.
(4) the LD drive manner of laser of the present invention is that pulse exports, the wavelength of LD is transferred near 811nm ~ 813nm by temperature control, light is led to along crystal Y direction, the high anti-lens of an anti-reflection 405-408nm of 811-815nm are placed before the crystal plane of incidence, place the lens of the high anti-405-408nm component permeate of a 811-815nm at exit facet, just can obtain the violet laser near 405 ~ 407nm by colour filter filtration fundamental frequency light.
Claims (8)
1. the violet laser of a noncritical phase matching frequency multiplication, it is characterized in that, this violet laser comprises LD and the LaCOB frequency-doubling crystal that center wavelength of light is 808 ± 5nm, the concrete corner cut of described LaCOB frequency-doubling crystal is (90 °, 90 °), above-mentioned corner cut follows crystallographic international practice, previous angle is the angle of Z axis in space cut direction and space coordinates, a rear angle is the projection of space cut direction in space coordinates in XY plane and the angle of X-axis, and wherein X-axis, Y-axis and Z axis are three-dimensional reference axis; Described laser is for utilizing noncritical phase matching technology direct frequency doubling semiconductor laser, and obtaining centre wavelength is all solid laser that 405 ~ 407nm purple light exports.
2. the violet laser of a kind of noncritical phase matching frequency multiplication according to claim 1, is characterized in that, described LD is pulse running LD or the LD that operates continuously, is 811nm-813nm by the tuning center wavelength of light of being transferred to out of temperature control technique.
3. the violet laser of a kind of noncritical phase matching frequency multiplication according to claim 1, is characterized in that, the preparation method of described LaCOB frequency-doubling crystal: by LaCOB crystal along the processing of optical main axis XYZ primary flat, XZ twin polishing.
4. the violet laser of a kind of noncritical phase matching frequency multiplication according to claim 1, it is characterized in that, the preparation method of described LaCOB frequency-doubling crystal: LaCOB crystal is processed along XYZ primary flat, XZ mirror polish, it is the ZX primary flat that the laser vertical of 811-813nm is incident to LaCOB frequency-doubling crystal that LD sends wavelength, leads to light along Y-axis.
5. the violet laser of a kind of noncritical phase matching frequency multiplication according to claim 3 or 4, is characterized in that, arranges the colour filter of filtering fundamental frequency light at the exit end of described LaCOB frequency-doubling crystal, have to wavelength be the violet laser of 405-407nm.
6. the violet laser of a kind of noncritical phase matching frequency multiplication according to claim 1, it is characterized in that, the preparation method of described LaCOB frequency-doubling crystal: LaCOB crystal is processed along XYZ primary flat, XZ mirror polish, the anti-reflection wavelength of the plane of incidence of described LaCOB frequency-doubling crystal be the laser of 811-815nm, high anti-wavelength is the laser of 405-408nm; The anti-reflection wavelength of exit facet of described LaCOB frequency-doubling crystal be the laser of 405-408nm, high anti-wavelength is the laser of 811-815nm.
7. the violet laser of a kind of noncritical phase matching frequency multiplication according to claim 6, is characterized in that, plated film on the described plane of incidence: 811-815nm anti-reflection film and 405-408nm high-reflecting film; Exit facet plated film at described LaCOB frequency-doubling crystal: 811-815nm high-reflecting film and 405-408nm anti-reflection film.
8. the violet laser of a kind of noncritical phase matching frequency multiplication according to claim 6, is characterized in that, arranges that 811-815nm is anti-reflection, the high anti-lens of 405-408nm in described plane of incidence front portion; The lens that a 811-815nm is high instead, 405-408nm is anti-reflection are set at exit facet rear portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310441354.5A CN103441420B (en) | 2013-09-25 | 2013-09-25 | Violet laser of a kind of noncritical phase matching frequency multiplication and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310441354.5A CN103441420B (en) | 2013-09-25 | 2013-09-25 | Violet laser of a kind of noncritical phase matching frequency multiplication and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103441420A CN103441420A (en) | 2013-12-11 |
| CN103441420B true CN103441420B (en) | 2015-11-18 |
Family
ID=49695102
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310441354.5A Active CN103441420B (en) | 2013-09-25 | 2013-09-25 | Violet laser of a kind of noncritical phase matching frequency multiplication and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103441420B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109286080B (en) * | 2018-10-23 | 2021-01-12 | 北京无线电测量研究所 | Polarization device |
| CN109659806B (en) * | 2019-02-22 | 2020-11-06 | 山东大学 | Temperature-insensitive frequency doubling crystal device and application thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102074887A (en) * | 2010-01-13 | 2011-05-25 | 山东大学 | Self frequency conversion solid state laser based on neodymium doped gadolinium calcium oxborate crystal |
| CN203521889U (en) * | 2013-09-25 | 2014-04-02 | 山东大学 | Noncritical phase matching frequency-doubled purple light laser |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6859467B2 (en) * | 2001-05-03 | 2005-02-22 | The Regents Of The University Of California | Electro-optic modulator material |
-
2013
- 2013-09-25 CN CN201310441354.5A patent/CN103441420B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102074887A (en) * | 2010-01-13 | 2011-05-25 | 山东大学 | Self frequency conversion solid state laser based on neodymium doped gadolinium calcium oxborate crystal |
| CN203521889U (en) * | 2013-09-25 | 2014-04-02 | 山东大学 | Noncritical phase matching frequency-doubled purple light laser |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103441420A (en) | 2013-12-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109149346B (en) | A kind of more optical parametric oscillators realized Energy Reversal and change intracavitary regulation | |
| CN107425407B (en) | Tunable blue light radiation source based on inner cavity self-frequency multiplication and implementation method | |
| CN105549295B (en) | It is a kind of to have both noncritical phase matching frequency multiplication, the ultraviolet laser frequency conversion device of frequency tripling performance and its working method | |
| CN106911062A (en) | A kind of green glow output optical fibre laser | |
| US20160145769A1 (en) | Deep ultraviolet non-linear optical crystal of barium borate hydrate, preparation method therefor and use thereof | |
| CN103114334B (en) | Compound tetrahydroxy barium borate and tetrahydroxy barium borate nonlinear optical crystal as well as preparation method and application | |
| CN103311782B (en) | Based on blue laser production method and the device of thulium-doped fiber laser quadruple | |
| CN105071214A (en) | Method for producing deep ultraviolet laser light through visible laser direct frequency conversion and all-solid-state deep ultraviolet laser | |
| CN101345388A (en) | Solid laser device for simultaneously outputting red, yellow and green light and its laser generation method | |
| CN103441420B (en) | Violet laser of a kind of noncritical phase matching frequency multiplication and preparation method thereof | |
| CN107069406A (en) | A kind of 671nm laser systems tested for cold atom | |
| CN103872562A (en) | Inner-cavity single-resonance optical parametric oscillator of fiber laser pump | |
| CN106544727B (en) | Acid iodide fluorine bismuth nonlinear optical crystal and its preparation method and application | |
| CN103259182B (en) | General electro-optical Q-switching switch and Q-switching laser for broadband passing through optical rotation crystal for single or odd times | |
| CN203521889U (en) | Noncritical phase matching frequency-doubled purple light laser | |
| CN207638146U (en) | Continuous wave 593nm optical parametric oscillators and optical device | |
| CN100395926C (en) | Cascade optical parameter oscillating laser | |
| CN104018225B (en) | Neodymium-doped A3BGa3Si2O14 series crystal and preparation method and application thereof | |
| CN104577700A (en) | Intermediate infrared laser device with tunable inner cavity OPO | |
| CN209929676U (en) | Fast tunable intermediate infrared radiation source device based on external cavity difference frequency | |
| CN109375448B (en) | Polarization controller based on frequency up-conversion technology and working method thereof | |
| CN100438232C (en) | Quasi-continuous high power red, green double-wavelength laser with LD side pumping | |
| CN205405031U (en) | Have ultraviolet laser converter of non -critical phase matching doubling of frequency, frequency tripling performance concurrently | |
| Sagawa et al. | Blue light emission from a laser diode pumped ring resonator with an organic second‐harmonic generation crystal of 8‐(4′‐acetylphenyl)‐1, 4‐dioxa‐8‐azaspirol [4.5] decane | |
| CN104836107A (en) | Monoblock crystal cavity blue light frequency multiplier |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240318 Address after: 518083 Smart Valley Innovation Plaza 301-A1, No. 542 Minzhi Avenue, Xinniu Community, Minzhi Street, Longhua District, Shenzhen City, Guangdong Province Patentee after: Shenzhen Youwei Optoelectronic Technology Co.,Ltd. Country or region after: China Address before: 250100, No. 27, Da Nan Road, Licheng District, Shandong, Ji'nan Patentee before: SHANDONG University Country or region before: China |