CN1129217C - Multiple wavelength solid laser - Google Patents
Multiple wavelength solid laser Download PDFInfo
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- CN1129217C CN1129217C CN 01106708 CN01106708A CN1129217C CN 1129217 C CN1129217 C CN 1129217C CN 01106708 CN01106708 CN 01106708 CN 01106708 A CN01106708 A CN 01106708A CN 1129217 C CN1129217 C CN 1129217C
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- light
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- reflecting mirror
- completely reflecting
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Abstract
The present invention relates to a full solid multi-wavelength laser which uses 532 nm light output by a Diode-Q-YLF laser to pump a titanium jewel laser cavity. 523 nm green light and 830 nm infrared light in the laser light output by the full solid multi-wavelength laser are separated by a semi-reflecting semitransparent mirror; 830 nm light is flattened and focused to a frequency multiplication crystal LBO. 415 nm blue light is focused to a frequency multiplication crystal BBO after the generated frequency multiplication light is filtered and flattened; quadruple-frequency light reaches a beam splitter prism after being collimated; 415 nm blue light and 208 nm ultraviolet light are respectively output. The present invention has a full solid structure, is capable of outputting multiple laser pulses of different wavelengths, and has the advantages of compact structure, stable performance, simple operation and high conversion efficiency.
Description
The invention belongs to the improvement of laser structure, especially relate to the multi-wavelength export technique field of solid state laser.
At present can produce the laser pulse that is as short as several femtoseconds, and the record of short pulse is shortening constantly to satisfy the needs of ultrafast process research in some basic subject also with the kerr lens mode locking ti sapphire laser.Short wavelength's ultra-short pulse laser such as blue light, ultraviolet light etc. are having application very widely such as fields such as biology, medical science diagnosis and treatment on the other hand.And utilize the titanium jewel of optical property and physical property excellence and the different total solids pulse laser system of wavelength that various frequency-doubling crystal is formed, will more and more be used with its Wavelength variable, compact conformation, steady performance.But such laser is seen as yet report is not arranged, and the second harmonic of titanium jewel femto-second laser pulse produces existing a large amount of report.
The objective of the invention is to design a kind of multiple wavelength solid pulse laser, make every effort to laser compact conformation, stable performance, simple to operate, conversion efficiency is high.
The multiple wavelength solid laser that the present invention is designed includes semiconductor pumped Q-YLF laser, speculum and lens, titanium precious stone laser chamber, nonlinear crystal LBO and BBO, Amici prism; Characteristics of the present invention are that as pumping source, the 532nm laser pulse of its output is through the first completely reflecting mirror M with semiconductor pumped Q-YLF laser
1With the second completely reflecting mirror M
2After the collimation leveling, by the first condenser lens f
1Focus on the titanium precious stone laser chamber, the 532nm of ti sapphire laser output and 830nm laser pulse separate the infrared light of the green glow of 532nm with 830nm to the Double-color film speculum of half-reflection and half-transmission, and wherein the 830nm laser pulse is again through the 3rd completely reflecting mirror M
3With the 4th completely reflecting mirror M
4After the collimation leveling, by the second condenser lens f
2Focus on nonlinear crystal LBO and carry out frequency multiplication generation 415nm laser pulse, the frequency doubled light of its output is through the 5th mirror M
5With the 6th mirror M
6Filter and the collimation leveling after, with the blue light of 415nm by the 3rd condenser lens f
3Focus on nonlinear crystal BBO frequency multiplication generation 208nm laser pulse once more, the frequency doubled light once more of its output is by collimating lens f
4Arrive Amici prism P, export the blue light of 415nm and the ultraviolet light of 208nm respectively.
Wherein, completely reflecting mirror M
1, M
2, M
3, M
4On plated film be total reflection film, and half-reflecting half mirror M
7, M
5, M
6On plated film be Double-color film; M
7On Double-color film to the 532nm green glow be all-trans, to 830nm infrared light full impregnated, or to 532nm green glow full impregnated, the 830nm infrared light is all-trans; Mirror M
5And M
6On Double-color film to the total reflection of 415nm blue light, to 830nm infrared light full impregnated.The making of various plated films of the present invention is existing mature technology.
Characteristics of the present invention also are, the stable cavity structure that described titanium precious stone laser cavity configuration adopts a recessed level crossing to form, wherein front cavity mirror M is that concave lens is to 532nm green glow full impregnated, be all-trans to the 830nm infrared light, Effect of Back-Cavity Mirror M0 is level crossing to 532nm green glow full impregnated, the 830nm infrared light is seen through 8-15%, titanium jewel Ti in the chamber: the length of S is 20mm, answer out of focus to place, promptly be positioned over the first lens f
1In the focus; In addition, at Effect of Back-Cavity Mirror M
0And can also be provided with accurate wave length tuning device BF between the titanium jewel and be used to improve the output wavelength precision.This installs separate case application Chinese patent (application number is 01212931.3), repeats no more here.
Feature of the present invention also is, described mirror M
7If the 532nm green glow is all-trans to 830nm infrared light full impregnated, the then 532nm green glow of reflection output, the 830nm infrared light of transmission is by mirror M
3And M
4The collimation leveling, this moment is in mirror M
3Or M
4The position be provided with slide rail along the minute surface direction, can be M
3Or M
4Any speculum is translated apart, and makes the output of 830nm infrared light; If remove semi-permeable and semi-reflecting mirror M
7Then arrive mirror M
3On light be mixed light, this moment with M
3Make semi-transparent semi-reflecting Double-color film speculum, it crosses output with 532nm green glow full impregnated, with the total reflection of 830nm infrared light to M
4, M
3And M
4Finish the collimation leveling jointly, and at M
4The minute surface direction be provided with slide rail, M
4Translation can make 830nm infrared light output.
Accompanying drawing 1 is the structure principle chart of the designed multiple wavelength solid laser of the present invention.Diode-Q-YLF is semiconductor pumped Q-YLF frequency double laser (U.S. Photonics Industries DS-20) among the figure; M
1And M
2Be first and second completely reflecting mirrors, the two finishes the collimation leveling to 532nm light jointly; f
1It is first condenser lens; M, Ti: S and M
0Common formation titanium precious stone laser chamber, front cavity mirror M is that concave mirror is all-trans Effect of Back-Cavity Mirror M to 532nm light full impregnated to 830nm light
0For level crossing to 532nm light full impregnated to 830nm light transmission 8-15%; BF is a wavelength fine tune device, can be arranged on optional position between titanium jewel and the Effect of Back-Cavity Mirror, is the Brewster angle and inserts light path; M
7Be the Double-color film speculum of half-reflection and half-transmission, 532nm light is all-trans to 830nm light full impregnated, be 45 and place; M
3And M
4Be third and fourth completely reflecting mirror, the two finishes the collimation leveling to 830nm light jointly; f
2It is second condenser lens; LBO and BBO are frequency-doubling crystal, and it is a nonlinear crystal, is produced by Shandong University; M
5And M
6Be the 5th and the 6th speculum, be the Double-color film speculum, to other light (mainly being 830nm) full impregnated mistake, the two finishes the collimation leveling to 415nm light jointly to the 415nm light total reflection; f
3It is the 3rd condenser lens; f
4Be collimating lens; P is an Amici prism, can adopt ultraviolet (quartz) prism.
By as can be seen above-mentioned, the present invention adopts efficient full consolidated structures can produce the pulse laser of a plurality of different wave lengths in triangular web, has the following advantages.1. whole system all adopts Solid Laser Elements from pumping source to each pilot process, thereby has guaranteed system configuration compactness, stable performance, the characteristics that volume is little.2. consider that YLF Lasers device light beam carefully reaches the factor of injury-free two aspects of protection titanium jewel end face; when design titanium precious stone laser chamber; emphasis has been optimized the focal length of pumping lens; make chamber mould and pump beam optimum Match; and out of focus places the titanium gem stick avoiding the focal beam spot damage, reaches 40% by the titanium precious stone laser chamber delivery efficiency of this design.3. since the ultraviolet light that the follow-up quadruple process of fundamental wave obtains near the gain margin wave band of bbo crystal, need fine tune titanium jewel first-harmonic light wavelength to be in higher relatively gain region and narrow spectral bandwidth to guarantee the quadruple wavelength, so in native system, be provided with accurate wave length tuning device, guaranteed the high conversion efficiency of quadruple process.4. all will adopt " focusing on fundamental wave-crystal-collimation frequency doubled light " structure in common frequency multiplication process, first overtone needs former and later two lens; If by this structure, twice frequency multiplication then needs four lens, and this can make system numerous and jumbled, and four scioptics of laser press the loss of high grade quartz material lens 8% and calculated, and luminous power is reduced to 72% after by four lens, and as seen loss is very big; The present invention adopts the imaging type structure in twice frequency multiplication, only need two lens to get final product.Dwindle for fear of imaging and to cause the 415nm blue light to damage bbo crystal, should make lbo crystal be in lens f as hot spot
3Two zoom and focus in.
Require measure according to above, the inventor makes a multiple wavelength solid laser model machine, this system all adopts the total solids device from pumping to the wavelength conversion process, the YLF pumping source is of a size of 20 * 15 * 50cm, the system that 830nm, 415nm and 208nm form is 20 * 25 * 50cm, the multiple-wavelength laser of made is transferred Q intracavity frequency doubling laser output 532nm laser pumping titanium precious stone laser chamber by semiconductor pumped YLF, produces wavelength 830nm infrared light; Condenser lens f wherein
1Focal length is 15cm, and front cavity mirror (concave mirror) M and Effect of Back-Cavity Mirror (level crossing) M0 constitute laser cavity, and concave mirror M is coated with Double-color film 830nm light is all-trans, to 532nm light full impregnated; Level crossing M0 plated film has 10% output rating to 830nm laser; Produce the blue light of 415nm, condenser lens f with this after with nonlinear crystal LBO frequency multiplication as fundamental frequency light
2Focal length is 6.5cm, and crystal length is 10mm (can choose wantonly); Make the deep UV (ultraviolet light) of output 208nm after the further frequency multiplication, condenser lens f with bbo crystal
3Focal length is 12.5cm, crystal length 10mm (can choose wantonly); Collimating lens f
4Focal length be 65mm.For preventing the crystal deliquescence, frequency-doubling crystal LBO and BBO are separately positioned in the sealing box body, and box body two ends (by light path) window is the Bvewster angle.
After testing, when pumping source YLF Lasers device at repetition rate 1KHz, when power output is 3.6W, the exportable maximum average power 1.1W of 830nm infrared light; The maximum output 380mW of 415nm blue light; The maximum output 39mW of 208nm ultraviolet light.Calculate loss, and the various losses such as plane of crystal reflection of condenser lens in frequency multiplication and the quadruple process, learn that the LBO shg efficiency is 40%, BBO quadruple efficient is 12%, and this is the highest at present.The user can select different output wavelengths according to different purposes.
Claims (6)
1, a kind of multiple wavelength solid laser, employing has semiconductor pumped Q-YLF laser, speculum and lens, titanium precious stone laser chamber, nonlinear crystal LBO and BBO, Amici prism, it is characterized in that, as pumping source, the 532nm laser pulse of its output is through the first completely reflecting mirror (M with semiconductor pumped Q-YLF laser
1) and the second completely reflecting mirror (M
2) collimation leveling after, by the first condenser lens (f
1) focusing on the titanium precious stone laser chamber, the 532nm of titanium precious stone laser chamber output and pulse laser to the semi-transparent semi-reflecting Double-color film speculum of 830nm separate the infrared light of the green glow of 532nm with 830nm, and wherein the 830nm infrared light is again through the 3rd completely reflecting mirror (M
3) and the 4th completely reflecting mirror (M
4) collimation leveling after, by the second condenser lens (f
2) focus on nonlinear crystal LBO and carry out frequency multiplication and produce the 415nm laser pulse, the frequency doubled light of its output is through the 5th speculum (M
5) and the 6th speculum (M
6) filter and the collimation leveling after, with the 415nm blue light by the 3rd condenser lens (f
3) focusing on nonlinear crystal BBO frequency multiplication generation 208nm laser pulse once more, the frequency doubled light once more of its output is by collimating lens (f
4) arrive Amici prism (P), export 415nm blue light and 208nm ultraviolet light respectively,
2, multiple-wavelength laser according to claim 1 is characterized in that, the front cavity mirror (M) in described titanium precious stone laser chamber is a concave lens,, the 830nm infrared light is all-trans Effect of Back-Cavity Mirror (M to 532nm green glow full impregnated
0) be level crossing, 532nm green glow full impregnated is seen through 8-15% to the 830nm infrared light, titanium jewel Ti in the chamber: the length of S is 20mm, is positioned over the first condenser lens (f
1) in the focus.
3, multiple-wavelength laser according to claim 2 is characterized in that, the Effect of Back-Cavity Mirror (M in the titanium precious stone laser chamber
0) and the titanium jewel between be provided with accurate wave length tuning device (BF), it is the Brewster angle and places in light path.
4, multiple-wavelength laser according to claim 3 is characterized in that, at Effect of Back-Cavity Mirror (M
0) and the 3rd completely reflecting mirror (M
3) between light path on tilting semi-transparent semi-reflecting Double-color film speculum (M arranged
7), it is mapped to the 3rd completely reflecting mirror (M to 532nm green glow total reflection output to 830nm infrared light full impregnated
3), by the 3rd completely reflecting mirror (M
3) and the 4th completely reflecting mirror (M
4) finish the collimation leveling; At the 3rd completely reflecting mirror (M
3) or the 4th completely reflecting mirror (M
4) the position be provided with slide rail along the minute surface direction, can be the 3rd completely reflecting mirror (M
3) or the 4th completely reflecting mirror (M
4) be translated apart, make the output of 830nm infrared light.
5, multiple-wavelength laser according to claim 3 is characterized in that, at Effect of Back-Cavity Mirror (M
0) afterwards the 3rd speculum (M
3) be semi-transparent semi-reflecting Double-color film speculum, it is totally reflected to the 4th completely reflecting mirror (M to the output of 532nm green glow total transmissivity to the 830nm infrared light
4), by the 3rd speculum (M
3) and the 4th completely reflecting mirror (M
4) finish the collimation leveling; At the 4th completely reflecting mirror (M
4) the position be provided with slide rail along the minute surface direction, the 4th completely reflecting mirror (M
4) translational energy make 830nm infrared light output.
According to claim 4 or 5 described multiple-wavelength lasers, it is characterized in that 6, described frequency-doubling crystal LBO and BBO are respectively placed in the sealing box body and are placed in the light path, its two ends window by light path is the Brewster angle in light path.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01106708 CN1129217C (en) | 2001-01-12 | 2001-01-12 | Multiple wavelength solid laser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01106708 CN1129217C (en) | 2001-01-12 | 2001-01-12 | Multiple wavelength solid laser |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1300122A CN1300122A (en) | 2001-06-20 |
| CN1129217C true CN1129217C (en) | 2003-11-26 |
Family
ID=4655686
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01106708 Expired - Fee Related CN1129217C (en) | 2001-01-12 | 2001-01-12 | Multiple wavelength solid laser |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1129217C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100345346C (en) * | 2005-08-12 | 2007-10-24 | 天津大学 | Multi wave length simultaneously output full solid state tunnable laser light source |
| CN100358192C (en) * | 2005-07-15 | 2007-12-26 | 天津大学 | Generator of terahertz by oscillator with acyclic polarized crystal and double-wavelength optical parameter |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1294682C (en) * | 2003-05-06 | 2007-01-10 | 中国科学院物理研究所 | Multi-wavelength synchronous running continuous laser |
| CN1301576C (en) * | 2004-12-31 | 2007-02-21 | 西北大学 | Laser diode pumping full-solid ultraviolet pulse laser |
| IT1400090B1 (en) | 2010-05-06 | 2013-05-17 | Eurotecnica Melamine Luxemburg Zweigniederlassung In Ittigen | LOW ENERGY CONSUMPTION PROCEDURE FOR THE PRODUCTION OF HIGH PURE MELAMINE THROUGH UREA PYROLYSIS, AND ITS EQUIPMENT |
-
2001
- 2001-01-12 CN CN 01106708 patent/CN1129217C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100358192C (en) * | 2005-07-15 | 2007-12-26 | 天津大学 | Generator of terahertz by oscillator with acyclic polarized crystal and double-wavelength optical parameter |
| CN100345346C (en) * | 2005-08-12 | 2007-10-24 | 天津大学 | Multi wave length simultaneously output full solid state tunnable laser light source |
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| Publication number | Publication date |
|---|---|
| CN1300122A (en) | 2001-06-20 |
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