CN1464600A - Up conversion self-doubling frequency ultraviolet laser - Google Patents
Up conversion self-doubling frequency ultraviolet laser Download PDFInfo
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- CN1464600A CN1464600A CN 02124625 CN02124625A CN1464600A CN 1464600 A CN1464600 A CN 1464600A CN 02124625 CN02124625 CN 02124625 CN 02124625 A CN02124625 A CN 02124625A CN 1464600 A CN1464600 A CN 1464600A
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Abstract
A automatic thickness gauge frequency multiplication UV laser in upconversion intracavity is characterized by that: double end surfaces of frequency up conversion nonlinearity laser crystal are cut perpendicular to the direction phase matching with frequency multiplication principal wave laser and form solid laser with relevant coating film ,in which , infrared light is utilized to pump output ultraviolet laser. The device is consisted of a piece of crystalloid and a pair of laser cavity mirror, and provides a simple and compact structure as well as high stability and reliability.
Description
A kind of conversion self-doubling frequency ultraviolet laser of going up relates to laser crystal and solid state laser design field.
A kind of conversion self-doubling frequency ultraviolet laser of going up, solid state laser have advantages such as beam quality height, running are reliable and stable, long service life.Calculate and the extensive use in field such as spectral measurement along with the development of laser technology and at information stores, photometry, short wavelength's Solid State Laser particularly ultraviolet Solid Laser Elements causes people's attention day by day.Existing solid Ultra-Violet Laser generally adopts the infrared semiconductor laser pumping output wavelength solid fundamental wave of laser longer than this semiconductor laser, just can obtain through at least twice frequency multiplication or with the frequency process again.Except a laser crystal, also need to adopt the nonlinear optical crystal more than two in its Laser Devices.This just makes device architecture very complicated, the price comparison costliness.Need in the use often device for non-linear optical wherein to be adjusted and proofreaied and correct, maintenance cost is higher, and stability and reliability are all poor,, can't use in a lot of fields also than higher the requirement of environment for use.
A kind ofly go up the conversion self-doubling frequency ultraviolet laser design, infrared light is transformed into the output of ultraviolet Solid State Laser effectively by the ultraviolet solid state laser that the single laser crystal of an infrared light pumping constitutes.Purpose be to solve current by infrared light pumping output ultraviolet Solid State Laser need adopt laser system complex structure that a series of device for non-linear optical brings, difficult in maintenance, problem such as cost an arm and a leg, make device try one's best compactness and miniaturization, improve operation stability simultaneously, reduce device cost.
The present invention adopts following technical scheme:
The laser crystal that this solid ultraviolet laser adopts is, doping can produce the nonlinear optical crystal of the rare earth ion of frequency up-conversion lasing as active ions, this crystalloid has nonlinear optical effect and passes through the dual-use function that processes such as excited state absorption or energy delivery produce the frequency up-conversion lasing, can be referred to as the conversion non-linear laser crystal.For example: at present existing nonlinear optical crystal Gd
xY
1-xAl
3(BO
3)
4, Ca
4Gd
xY
1-xO (BO
3)
3, Gd
2xY
2 (1-x)(MoO
4)
3, (wherein x can change to 1 from 0), LaSc
3(BO
3)
4In, with rare earth ion such as Pr
3+, Nd
3+, Ho
3+, Er
3+, Tm
3+Deng, as all or part of replacement of active ions Gd
3+, Y
3+Or La
3+Ion.Perhaps other can be by rare-earth ion activated nonlinear optical crystal, as RE
3+: MgO:LiNbO
3, RE
3+: ZnO:LiNbO
3(rare earth ions such as RE=Pr, Ho, Er, Tm) etc.
With the both ends of the surface of last conversion non-linear laser crystal, cut perpendicular to the phase matched direction of conversion fundamental wave of laser on the frequency multiplication on the edge, and constitute solid state laser with corresponding plated film sheet.
This solid ultraviolet laser adopts the infrared light pumping.Make the wavelength of fundamental wave of laser be shorter than the infrared light wavelength of pumping through transfer process on the frequency of active ions, the nonlinear optical effect of utilizing non-linear laser crystal self to have is again exported this fundamental wave of laser frequency multiplication the Ultra-Violet Laser of high light beam quality.So claim that this device is last conversion self-doubling frequency ultraviolet laser.
The present invention program's implementation now is described in conjunction with the accompanying drawings:
At first, according to the situation of infrared pump light and the requirement of shoot laser, select suitable rare earth ion as active ions and suitable nonlinear optical crystal as host crystal, last conversion non-linear laser crystal growth.According to the frequency multiplication needs last conversion non-linear laser crystal (1) is carried out the orientation cutting again, make its incident vertical with required phase matched direction with the outgoing end face, the length of crystal can be determined (generally millimeter to tens centimetre between) according to the requirement of concrete material and device, and end area is generally square between the centimeter square at millimeter.Afterwards this crystal is placed the medium diaphragm (2) of two suitable laser operations and the laser cavity that (3) constitute, be one and be suitable for infrared light, along direction (6) output Ultra-Violet Laser along direction (4) end pumping or along the single crystal self-doubling frequency ultraviolet laser of direction (5) side-pumping.
Can be in last conversion non-linear laser crystal one of doping percentage to the sensitized ions of 99 percent molar concentration, as Yb
3+Deng, to strengthen absorption, improve laser operation efficient to pump light.At the last anti-reflection film of changing both ends of the surface plating pump light, fundamental wave and the ultraviolet light of non-linear laser crystal, can improve laser operation efficient.
Directly at the both ends of the surface plated film of last conversion non-linear laser crystal, can directly constitute one does not have incident chamber mirror and outgoing chamber mirror, but has the laser of identical function.
The useful effect that enforcement the present invention has is as follows:
Adopt the infrared light pumping Ultra-Violet Laser system of two blocks of above nonlinear optical crystals to compare with existing the needs, the present invention is exportable Ultra-Violet Laser by the laser that single upward conversion non-linear laser crystal constitutes through the infrared light pumping.The invention enables the Ultra-Violet Laser device compact more, overcome the complexity of device manufacturing, maintenance, adjustment, reduced manufacturing and maintenance cost, improved stability and the reliability of running, be convenient to use under the various environmental conditions, will further expand the application of Ultra-Violet Laser.
A kind of structure that goes up conversion self-doubling frequency ultraviolet laser as shown in drawings, wherein (1) is to change non-linear laser crystal on the frequency, its end face is along the phase matched direction cutting perpendicular to conversion fundamental wave of laser on the frequency multiplication; (2) be the incident plated film chamber mirror of laser cavity; (3) be the outgoing plated film chamber mirror of laser cavity; (4) be the infrared light incident direction of end pumping; (5) be the infrared light incident direction of side-pumping; (6) be the Ultra-Violet Laser exit direction.
A kind of embodiment of upward conversion self-doubling frequency ultraviolet laser is as follows:
Pr is mixed in the infrared light pumping of example 1:830nm wavelength
3+The last conversion of last conversion non-linear laser crystal generation 720nm fundamental wave of laser (
3P
0→
3F
4), produce the output of 360nm Ultra-Violet Laser from frequency multiplication again.Last conversion non-linear laser crystal Pr
xY
1-xAl
3(BO
3)
4(x is between 0.001 to 1) both ends of the surface edge is perpendicular to I class phase matching angle θ=48.2 ° of (this matching angle may need to do suitably to adjust according to different doping content x) directed cuttings, the size of determining crystal simultaneously (is generally end area and arrives square centimeter at square millimeter, length is square column or the cylinder between several millimeters to tens centimetres), the end face polishing is placed in the laser cavity.Incident plated film chamber mirror (2) is near near high saturating the pump light wavelength 830nm, fundamental wave of laser wavelength 720nm high anti-(R＞99%); Outgoing plated film chamber mirror (3) is transmitance＞75% near high anti-(R＞99%), 360nm near 830nm and the 720nm.This is a last conversion self-doubling frequency ultraviolet laser that is suitable for the 830nm infrared light along direction (4) or (5) pumping, along the Ultra-Violet Laser of direction (6) output 360nm wavelength.
Er is mixed in the infrared light pumping of wavelength near the example 2:800nm
3+The last conversion of last conversion non-linear laser crystal generation 671nm fundamental wave of laser (
4F
9/2→
4I
15/2), produce the output of 336nm Ultra-Violet Laser from frequency multiplication again.Last conversion non-linear laser crystal Er
xY
1-xAl
3(BO
3)
4(x is between 0.001 to 1) both ends of the surface are along cutting (this matching angle may need to do suitably to adjust according to different doping content x) perpendicular to I class phase matching angle θ=53.25 ° of orientations, the size of determining crystal simultaneously (is generally end area and arrives square centimeter at square millimeter, length is square column or the cylinder between several millimeters to tens centimetres), the end face polishing is placed in the laser cavity.Incident plated film chamber mirror (2) is near near high saturating the pump light wavelength 800nm, fundamental wave of laser wavelength 671nm high anti-(R＞99%); Outgoing plated film chamber mirror (3) is transmitance＞75% near high anti-(R＞99%), 336nm near 800nm and the 671nm.This is a last conversion self-doubling frequency ultraviolet laser that is suitable for the 800nm infrared light along direction (4) or (5) pumping, along the Ultra-Violet Laser of direction (6) output 336nm wavelength.
Tm is mixed in the infrared light pumping of example 3:969nm wavelength
3+The last conversion of last conversion non-linear laser crystal generation 650nm fundamental wave of laser (
1G
4→
3F
4), produce the output of 325nm Ultra-Violet Laser from frequency multiplication again.Last conversion non-linear laser crystal Tm
xY
1-xAl
3(BO
3)
4(x is between 0.001 to 1) both ends of the surface are along cutting (this matching angle may need to do suitably to adjust according to different doping content x) perpendicular to I class phase matching angle θ=55.9 ° of orientations, the size of determining crystal simultaneously (is generally end area and arrives square centimeter at square millimeter, length is square column or the cylinder between several millimeters to tens centimetres), the end face polishing is placed in the laser cavity.Incident plated film chamber mirror (2) is near near high saturating the pump light wavelength 969nm, fundamental wave of laser wavelength 650nm high anti-(R＞99%); Outgoing plated film chamber mirror (3) is transmitance＞75% near high anti-(R＞99%), 325nm near 969nm and the 650nm.This is a last conversion self-doubling frequency ultraviolet laser that is suitable for the 969nm infrared light along direction (4) or (5) pumping, along the Ultra-Violet Laser of direction (6) output 325nm wavelength.
Pr is mixed in the infrared light pumping of example 4:830nm wavelength
3+The last conversion of last conversion non-linear laser crystal generation 635nm fundamental wave of laser (
3P
0→
3F
2), produce the output of 318nm Ultra-Violet Laser from frequency multiplication again.Last conversion non-linear laser crystal Pr
xY
1-xAl
3(BO
3)
4(x is between 0.001 to 1) both ends of the surface are along cutting (this matching angle may need to do suitably to adjust according to different doping content x) perpendicular to I class phase matching angle θ=58.0 ° of orientations, the size of determining crystal simultaneously (is generally end area and arrives square centimeter at square millimeter, length is square column or the cylinder between several millimeters to tens centimetres), the end face polishing is placed in the laser cavity.Incident plated film chamber mirror (2) is near near high saturating the pump light wavelength 830nm, fundamental wave of laser wavelength 635nm high anti-(R＞99%); Outgoing plated film chamber mirror (3) is transmitance＞75% near high anti-(R＞99%), 318nm near 830nm and the 635nm.This is a last conversion self-doubling frequency ultraviolet laser that is suitable for the 830nm infrared light along direction (4) or (5) pumping, along the Ultra-Violet Laser of direction (6) output 318nm wavelength.
Er is mixed in the infrared light pumping of wavelength near the example 5:800nm
3+The last conversion of last conversion non-linear laser crystal generation 551nm fundamental wave of laser (
4S
3/2→
4I
15/2), produce the output of 276nm Ultra-Violet Laser from frequency multiplication again.Last conversion non-linear laser crystal Er
xY
1-xAl
3(BO
3)
4(x is between 0.001 to 1) both ends of the surface are along cutting (this matching angle may need to do suitably to adjust according to different doping content x) perpendicular to I class phase matching angle θ=79.5 ° of orientations, the size of determining crystal simultaneously (is generally end area and arrives square centimeter at square millimeter, length is square column or the cylinder between several millimeters to tens centimetres), the end face polishing is placed in the laser cavity.Incident plated film chamber mirror (2) is near near high saturating the pump light wavelength 800nm, fundamental wave of laser wavelength 551nm high anti-(R＞99%); Outgoing plated film chamber mirror (3) is transmitance＞75% near high anti-(R＞99%), 276nm near 800nm and the 551nm.This is a last conversion self-doubling frequency ultraviolet laser that is suitable for the 800nm infrared light along direction (4) or (5) pumping, along the Ultra-Violet Laser of direction (6) output 276nm wavelength.
Claims (5)
1, a kind of conversion self-doubling frequency ultraviolet laser of going up by infrared light pumping system, laser cavity with go up the conversion non-linear laser crystal and forms, is characterized in that: only go up with one in the laser cavity and change non-linear laser crystal, this non-linear laser crystal employing Gd
xY
1-xAl
3(BO
3)
4, Ca
4Gd
xY
1-xO (BO
3)
3, Gd
2xY
2 (1-x)(MoO
4)
3, (wherein x can change to 1 from 0) or LaSc
3(BO
3)
4In a kind of nonlinear optical crystal, with rare earth ion Pr
3+, Nd
3+, Ho
3+, Er
3+Or Tm
3+, as all or part of replacement of active ions Gd
3+, Y
3+Or La
3+Ion; Perhaps adopt other can be by rare-earth ion activated nonlinear optical crystal RE
3+: MgO:LiNbO
3Or RE
3+: ZnO:LiNbO
3, RE=Pr, Nd, Ho, Er or Tm rare earth ion.
2, a kind of conversion self-doubling frequency ultraviolet laser of going up as claimed in claim 1, it is characterized in that: the described conversion non-linear laser crystal of going up, its both ends of the surface are along cutting perpendicular to the phase matched direction from frequency multiplication, and the length of crystal is determined according to the requirement of concrete material and device.
3, a kind of conversion self-doubling frequency ultraviolet laser of going up as claimed in claim 1 is characterized in that: one of doping percentage is to the sensitized ions Yb of 99 percent molar concentration in the described upward conversion non-linear laser crystal
3+
4, a kind of conversion self-doubling frequency ultraviolet laser of going up as claimed in claim 1 is characterized in that: the described anti-reflection film of going up both ends of the surface plating pump light, fundamental wave and the ultraviolet light of conversion non-linear laser crystal.
5, a kind of last conversion self-doubling frequency ultraviolet laser of claim 1 is characterized in that: directly at the both ends of the surface plated film of last conversion non-linear laser crystal, constitute a ultraviolet laser that does not have incident chamber mirror and outgoing chamber mirror.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02124625 CN1464600A (en) | 2002-06-20 | 2002-06-20 | Up conversion self-doubling frequency ultraviolet laser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02124625 CN1464600A (en) | 2002-06-20 | 2002-06-20 | Up conversion self-doubling frequency ultraviolet laser |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1464600A true CN1464600A (en) | 2003-12-31 |
Family
ID=29743861
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02124625 Pending CN1464600A (en) | 2002-06-20 | 2002-06-20 | Up conversion self-doubling frequency ultraviolet laser |
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|---|---|
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100401599C (en) * | 2004-04-20 | 2008-07-09 | 中国科学院福建物质结构研究所 | Frequency multiplication ultraviolet solid laser applying non-linear laser crystal |
| CN102797038A (en) * | 2012-08-10 | 2012-11-28 | 中国科学院上海光学精密机械研究所 | Mg-Yb-Er doped lithium niobate laser crystals and preparation method thereof |
| CN109161968A (en) * | 2018-08-27 | 2019-01-08 | 中山大学 | A kind of red long-afterglow single crystal material and preparation method thereof |
-
2002
- 2002-06-20 CN CN 02124625 patent/CN1464600A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100401599C (en) * | 2004-04-20 | 2008-07-09 | 中国科学院福建物质结构研究所 | Frequency multiplication ultraviolet solid laser applying non-linear laser crystal |
| CN102797038A (en) * | 2012-08-10 | 2012-11-28 | 中国科学院上海光学精密机械研究所 | Mg-Yb-Er doped lithium niobate laser crystals and preparation method thereof |
| CN109161968A (en) * | 2018-08-27 | 2019-01-08 | 中山大学 | A kind of red long-afterglow single crystal material and preparation method thereof |
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Open date: 20031231 |