CN1818770A - Intermediate infrared coherent light source of solid continuous wide band - Google Patents
Intermediate infrared coherent light source of solid continuous wide band Download PDFInfo
- Publication number
- CN1818770A CN1818770A CN 200610013289 CN200610013289A CN1818770A CN 1818770 A CN1818770 A CN 1818770A CN 200610013289 CN200610013289 CN 200610013289 CN 200610013289 A CN200610013289 A CN 200610013289A CN 1818770 A CN1818770 A CN 1818770A
- Authority
- CN
- China
- Prior art keywords
- high transmittance
- crystal
- laser
- opo
- transmittance film
- 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.)
- Granted
Links
Abstract
An intermediate infrared coherent light source of total solid continuous wideband is prepared as utilizing continuous 1064nm laser pumping cycle generated by end surface continuous pumping Nd: YVO4 crystal of semiconductor laser to polarize LiNbO3 crystal-optical parameter oscillator and applying internal cavity OPO scheme to set PPLN crystal in laser resonant cavity to obtain intermediate infrared tunable light source with high efficiency and long service life through means of regulating relative parameters .
Description
Technical field
The present invention relates to a kind of LASER Light Source, relate in particular to a kind of solid continuous wide band LASER Light Source, belong to the nonlinear optical frequency conversion technical field.
Background technology
Infrared light has three main transmission windows in atmosphere: 1～3 μ m, and 3～5 μ m, 8～12 μ m, wherein 3～5 mu m wavebands are the minimum infrared windows of decay.This wave band of laser has stronger penetration power to dense fog, flue dust etc., and transmission is subjected to that gas molecule absorbs and the suspension scattering is little on the sea level.The responding range of infrared guidance guided missile detection device is at 3～5 mu m wavebands, thereby presses for the LASER Light Source of this wave band at the photoelectronic warfare of infrared seeker.In 3～5 μ m zones, most important hydrocarbon gas and other toxic gas molecules have strong absorption characteristic, thereby in infrared coherent source in the minimum gas field of detecting civilian widely value is arranged: as oilfield exploitation, the natural gas line leak detection, the atmosphere percent of greenhouse gases is surveyed, drugs inspection, methane gas detection etc. in the colliery.Because 3～5 mu m waveband lasers all have important use to be worth and prospect at numerous areas such as spectroscopy, remote sensing, medical treatment, environmental protection and military affairs, therefore the research to 3～5 mu m waveband lasers becomes at present ten minutes popular topic in the world.
Over nearly 40 years, optical parametric oscillator (OPO) be considered to obtain conventional laser the perfect light source of the coherent light in the inaccessible spectral range.An OPO just can obtain the output of continuously adjustable in the spectral range of non-constant width, simultaneously OPO also has all solid state design, high-level efficiency and has considerable advantages such as output power, and OPO can export or export such as ultrashort pulses such as femtoseconds continuously on the time domain.
The performance parameter of OPO almost completely depends on the spectral characteristic and the beam quality of pump laser, and the characteristic of nonlinear crystal.From present laser instrument development, in the coherent source of infrared spectral coverage still to depend on OPO (adopting the PPLN crystal), from work spectral coverage and time domain, there has been the product of a lot of moulding in the OPO market of pulse (ns) and locked mode (ps/fs), but the scarcity of the continuous OPO of middle-infrared band (3～5 μ m) is perplexing numerous scientific research personnel always.
The all solid state laser that with laser diode-pumped solid state laser is pumping source becomes the most excellent up to now laser instrument with little, the in light weight characteristics such as low of its high power, high light beam quality, high-level efficiency, volume.In the last few years, (maturation of QPM utilized the nonlinear optical frequency conversion technology of periodical poled crystal to cause people's extensive concern along with quasi-phase matching.The quasi-phase matching great advantage is a non-linear conversion efficient height, and can make those crystal that under usual conditions, can't realize phase matching and logical optical band be achieved frequency transformation, widened range of application, increased tuning manner, made puzzlement people output efficient, broadband laser for a long time become possibility.At present, the common periodical poled crystal that is used for accurate phase matching has PPLN, PPKTP and PPLT, the effective nonlinear coefficient of PPLN big (16pm/V) wherein, and Polarization technique maturation, become the periodical poled crystal that is most widely used, PPLN-OPO is important means and the effective way that realizes nonlinear optical frequency conversion, also is another research focus of tunable optical source aspect.Therefore, utilize all solid state tunable laser pumping quasi-phase matched optical parametric oscillator, by adjusting correlation parameter, as the temperature of pumping wavelength, polarized crystal and cycle etc., can obtain high-output power, high-level efficiency, tuning range is big, the life-span is long, the continuous running tunable IR light source of compact conformation.
Summary of the invention
The goal of the invention of this patent is to utilize all solid state end pumping continuous Nd: YVO
4Laser instrument is as pumping source, and pumping inner chamber PPLN-OPO produces the broadband infrared light source of 3～5 μ m, satisfies the needs at numerous areas such as spectroscopy, remote sensing, medical treatment, environmental protection and military affairs.
Technical scheme of the present invention is as follows:
Infrared coherent source comprises pumping source in a kind of solid continuous wide band, parametric oscillation crystal (PPLN), and the optical parameter resonator cavity, wherein:
Pumping source is an all solid state laser, utilizes the continuous pumping Nd:YVO4 of semiconductor laser diode end face crystal, adopts and is close to or the self-focusing coupling scheme, produces continuous 1064nm laser;
The cavity of optical parameter resonator cavity for constituting by OPO total reflective mirror and OPO outgoing mirror, described OPO total reflective mirror is flat mirror, it simultaneously plates the 1064nm high transmittance film, another side plating 1064nm high transmittance film and 1400～1500nm high-reflecting film, described OPO outgoing mirror is the plano-concave mirror, its concave surface plating 1064nm high-reflecting film, 1400～1500nm high transmittance film and 3000～5000nm high transmittance film, its plane plating 3000～5000nm high transmittance film, can the size of chamber length and radius-of-curvature be determined with the pattern match that realize 1064nm and 1500nm light;
The polarization cycle of parametric oscillation crystal (PPLN) is 28.5 μ m, both-end plating 1064nm high transmittance film, 1400～1500nm high transmittance film, 3700～4000nm high transmittance film, be positioned at above-mentioned resonator cavity, and be fixed on furnace temperature in 300K can the continually varying temperature controlling stove to 473K.
The present invention has following beneficial effect:
1. the compact conformation of all solid state laser, firm and durable, low price occupy important status in laser is used.
2. hold the good beam quality of pumping light, spatially the chamber mould with solid state laser can obtain better matching.And end-pumping mode coupling efficiency is high, and in the application of middle low power laser, especially continuous laser demonstrates remarkable advantages on using.
3. adopt periodical poled crystal to realize quasi-phase matched optical parametric oscillator, be a kind of novel important means and the effective way that realizes tunable infrared light supply, utilize the specific wavelength of high power all solid state laser output, pumping cycle polarized crystal, by adjusting correlation parameters such as temperature, cycle, can obtain that high-output power, high-level efficiency, tunable wavelength scope are big, the life-span long, compact conformation and the little tunable IR light source of volume is a kind of desirable tuning manner.
4. all-solid-state continuous wave PPLN optical parametric oscillator, not only have advantages such as all solid state laser power level height, compact conformation, low price, the wideband adjustable that also has quasi-phase matched optical parametric oscillator, the advantage that volume is little, trace gas analysis in atmospheric science, optoacoustic spectroscopy, waste gas detects, airborne land on a large scale and marine pollution are surveyed, air pollution analysis, fields such as Military Application have vast scientific research value and wide application prospect and have filled up the technological gap in this field.
Description of drawings
Fig. 1 is the structural representation of infrared coherent source in the solid continuous wide band of the present invention.Among the figure:
1. laser diode; 2.Nd:YVO
4Crystal; 3.OPO total reflective mirror; 4.PPLN crystal; 5.OPO output
Embodiment
The present invention all adopts full solid-state device, utilizes the continuous pumping Nd:YVO of semiconductor laser end face
4The period polarized LiNbO of continuous 1064nm laser pump (ing) that crystal produces
3Crystal (PPLN) optical parametric oscillator, employing places the PPLN crystal inner chamber OPO scheme of laserresonator, by correlation parameters such as adjustment temperature, obtain that high-level efficiency, tunable wavelength scope are big, the life-span long, compact conformation and the little middle tunable IR light source of volume, satisfy the application demand of numerous areas such as optical communication, infrared counteraction, environmental monitoring and spectroscopy research.
Laser diode end-face pump solid laser has higher pump conversion efficiency, by regulating pump spot and resonator cavity being optimized design, can obtain the high light beam quality laser output of nearly diffraction limit, be the preferred manner of middle low power continuous wave laser.Laser component is all solid state, compact conformation, and present domestic laser diode mature production technology, single tube power has reached 5W, so this programme is selected the laser diode end-face pump mode for use.
Nd:YVO
4Crystal has bigger stimulated emission cross section, and output light has polarization characteristic, and the growing technology maturation, by laser diode-pumped Nd:YVO
4Light-the light conversion efficiency of crystal acquisition 1064nm laser can be greater than 50%, M
2＜2, so this programme selects the pumping source of laser diode end-face pump Nd:YVO4 laser instrument as OPO for use, makes full use of its high light beam quality and polarization characteristic, to realize high efficiency nonlinear optical frequency conversion.
Optical parametric oscillator is considered to that the most important nonlinear optical frequency conversion technology of single wavelength to long wavelength's expansion had advantages such as miniaturization, high-level efficiency and tunable wave length.Optical parametric oscillator is combined with all solid state laser, is the main mode that obtains high power long wavelength tunable optical source.This programme selects for use the PPLN optical parametric oscillator that 1064nm laser is expanded to the long wavelength, to obtain the output of 3～5 μ m laser.Select inner chamber OPO scheme for use, nonlinear crystal is placed in the laserresonator, the OPO resonator cavity is combined with laser resonant cavity, make full use of the high characteristic of laserresonator intracavity power density by plated film.Because quasi-phase matching has high non-linear conversion efficient, so this patent adopts periodical poled crystal to realize the scheme of quasi-phase matched optical parametric oscillator.PPLN has bigger nonlinear factor d
33(16pm/V), the Polarization technique maturation, physical and chemical performance is stable and be difficult for deliquescence, therefore, selects the nonlinear crystal of PPLN as OPO for use.
Below in conjunction with accompanying drawing the present invention is further described:
Referring to Fig. 1, LASER Light Source of the present invention has following structure: 1. system all adopts full solid-state device; 2. utilize the continuous pumping Nd:YVO4 of semiconductor laser diode end face crystal, adopt and be close to or the self-focusing coupling scheme, produce continuous 1064nm laser; 3. 4. the material K9 of OPO total reflective mirror or BK7 glass.Flat mirror, φ=20mm, one side is plated 1064nm high transmittance film (HT), another side plating 1064nmHT, 1400～1500nm high-reflecting film (HR); 5. parametric oscillation crystal PPLN is of a size of 50 * 10 * 1mm, polarization cycle Λ=28.5 μ m.Both-end plating 1064nmHT, 1400～1500nmHT, 3700～4000nmHT film.6. the OPO outgoing mirror is φ=20mm, and the plano-concave mirror of radius of curvature R=150mm adopts CaF
2Material.Concave surface plating 1064nmHR, 1400～1500nmHR, 3000～5000nmHT film, plane plating: 3000～5000nmHT film; 7. 1064nm resonator cavity chamber is long is 140mm, and OPO resonator cavity chamber is long to be 110mm, by the size of control chamber length and radius-of-curvature, can realize the pattern match of 1064nm and 1500nm light, and operation material place basic mode spot radius is 120 μ m; 8. the working temperature of laser diode, laser crystal is 18 ℃, semiconductor refrigerating; The PPLN crystal is fixed in the temperature controlling stove, and the temperature controlling stove temperature can change to 473K continuously at 300K; 9. export infrared wideband light source in the continuously adjustable continuous running of 3～5um.
Claims (3)
1. infrared coherent source in the solid continuous wide band comprises pumping source, parametric oscillation crystal (PPLN), and the optical parameter resonator cavity is characterized in that:
Described pumping source is an all solid state laser, utilizes the continuous pumping Nd:YVO of semiconductor laser diode end face
4Crystal adopts and is close to or the self-focusing coupling scheme, produces continuous 1064nm laser;
The cavity of described optical parameter resonator cavity for constituting by OPO total reflective mirror and OPO outgoing mirror, described OPO total reflective mirror is flat mirror, it simultaneously plates the 1064nm high transmittance film, another side plating 1064nm high transmittance film and 1400～1500nm high-reflecting film, described OPO outgoing mirror is the plano-concave mirror, its concave surface plating 1064nm high-reflecting film, 1400～1500nm high transmittance film and 3000～5000nm high transmittance film, its plane plating 3000～5000nm high transmittance film, can the size of chamber length and radius-of-curvature be determined with the pattern match that realize 1064nm and 1500nm light;
The polarization cycle of described parametric oscillation crystal (PPLN) is 28.5 μ m, both-end plating 1064nm high transmittance film, 1400～1500nm high transmittance film, 3700～4000nm high transmittance film, be positioned at above-mentioned resonator cavity, and be fixed on furnace temperature in 300K can the continually varying temperature controlling stove to 473K.
2. infrared coherent source in the solid continuous wide band according to claim 1, it is characterized in that, described crystal Nd:YVO4 is of a size of 3 * 3 * 5mm, doping content 1.0at%, it is near end plating 808nm high transmittance film, the 1064nm high-reflecting film of laser diode end face, near the end plating 808nm and the 1064nm high transmittance film of output terminal.
3. infrared coherent source in the solid continuous wide band according to claim 1 is characterized in that, the chamber of described optical parameter resonator cavity is long to be 110mm, and the radius-of-curvature of described OPO outgoing mirror is 150mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100132896A CN100392513C (en) | 2006-03-13 | 2006-03-13 | Intermediate infrared coherent light source of solid continuous wide band |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100132896A CN100392513C (en) | 2006-03-13 | 2006-03-13 | Intermediate infrared coherent light source of solid continuous wide band |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1818770A true CN1818770A (en) | 2006-08-16 |
| CN100392513C CN100392513C (en) | 2008-06-04 |
Family
ID=36918831
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100132896A Expired - Fee Related CN100392513C (en) | 2006-03-13 | 2006-03-13 | Intermediate infrared coherent light source of solid continuous wide band |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100392513C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101614928B (en) * | 2009-07-21 | 2010-12-01 | 中国船舶重工集团公司第七一七研究所 | Mid-infrared parameter oscillator |
| CN104779516A (en) * | 2015-04-20 | 2015-07-15 | 中国科学院上海光学精密机械研究所 | Intermediate infrared single-frequency optical parametric oscillator |
| CN104836105A (en) * | 2015-05-25 | 2015-08-12 | 南京信息工程大学 | Intermediate infrared pulse optical parametric oscillator based on carbon nano tube saturable absorber mirror |
| CN110535020A (en) * | 2019-09-09 | 2019-12-03 | 山东大学 | A kind of optical parametric oscillator welded for transparent or white plastic |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6785041B1 (en) * | 2001-10-31 | 2004-08-31 | Konstantin Vodopyanov | Cascaded noncritical optical parametric oscillator |
| WO2004070895A2 (en) * | 2003-02-03 | 2004-08-19 | Bae Systems Information And Electronic Systems Integration Inc. | Thulium laser pumped mid-ir source with broadbanded output |
-
2006
- 2006-03-13 CN CNB2006100132896A patent/CN100392513C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101614928B (en) * | 2009-07-21 | 2010-12-01 | 中国船舶重工集团公司第七一七研究所 | Mid-infrared parameter oscillator |
| CN104779516A (en) * | 2015-04-20 | 2015-07-15 | 中国科学院上海光学精密机械研究所 | Intermediate infrared single-frequency optical parametric oscillator |
| CN104779516B (en) * | 2015-04-20 | 2017-09-12 | 中国科学院上海光学精密机械研究所 | In infrared single-frequency optical parametric oscillator |
| CN104836105A (en) * | 2015-05-25 | 2015-08-12 | 南京信息工程大学 | Intermediate infrared pulse optical parametric oscillator based on carbon nano tube saturable absorber mirror |
| CN110535020A (en) * | 2019-09-09 | 2019-12-03 | 山东大学 | A kind of optical parametric oscillator welded for transparent or white plastic |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100392513C (en) | 2008-06-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102386549B (en) | Tunable terahertz radiation source based on difference frequency cherenkov effect and modulation method | |
| CN101923265B (en) | Medium infrared parameter converter | |
| CN201518383U (en) | Mid-IR coherent optical source apparatus | |
| CN100392513C (en) | Intermediate infrared coherent light source of solid continuous wide band | |
| CN104779516B (en) | In infrared single-frequency optical parametric oscillator | |
| Carrig et al. | Chromium-doped chalcogenide lasers | |
| US20100074281A1 (en) | Thulium Laser Pumped Mid-IR Source With Multi-Spectral Line Output | |
| CN106169696A (en) | A kind of continuously tunable laser based on stimulated raman scattering | |
| US7733926B2 (en) | Thulium laser pumped Mid-IR source with broadbanded output | |
| CN105846302A (en) | Novel Kerr-lens mode-locking Cr: ZnS femtosecond laser | |
| CN102402097A (en) | Wavelength conversion method, optical parameter oscillator and optical parameter amplifier | |
| CN105159008B (en) | The application of niobic acid gallium lanthanum crystal device for non-linear optical of infrared band as in | |
| CN102570268A (en) | Intermediate infrared laser | |
| CN100458407C (en) | Solid double-wavelength detecting laser radar | |
| Pomeranz et al. | Tm: YAlO3 laser pumped ZGP mid-IR source | |
| CN1845405A (en) | Optical parameter oscillation laser as frequency conversion crystal using stoichiometric lithium tantalite superlattice | |
| CN2882042Y (en) | Whole solid quasi-continuous broadband near-infrared coherent light source | |
| CN201549762U (en) | Intermediate infrared laser system | |
| CN2917036Y (en) | High-power narrow line-width full solid state 455nm pulse laser | |
| Lia et al. | 8.30 μm singly resonant ZnGeP 2 optical parametric oscillators pumped by a Tm, Ho: GdVO 4 laser | |
| CN101752777A (en) | Semiconductor or flashlight pumping microchip laser module | |
| CN112234422A (en) | Dual-mode intermediate infrared parametric oscillator capable of switching output | |
| CN204103240U (en) | A kind of miniaturized continuous wave mid-infrared light parametric oscillator | |
| CN110518445A (en) | The optical parameter chirp pulse amplification system of wideband adjustable based on soliton self-frequency sh | |
| Yang et al. | Luminescence and laser performances of coumarin dyes doped in ORMOSILs |
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 | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080604 Termination date: 20120313 |