CN207946631U - A kind of solid and frequency Sodium guide star spectrum continuous laser output device - Google Patents
A kind of solid and frequency Sodium guide star spectrum continuous laser output device Download PDFInfo
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- CN207946631U CN207946631U CN201820103670.XU CN201820103670U CN207946631U CN 207946631 U CN207946631 U CN 207946631U CN 201820103670 U CN201820103670 U CN 201820103670U CN 207946631 U CN207946631 U CN 207946631U
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Abstract
The utility model is related to a kind of solids and frequency Sodium guide star spectrum continuous laser output device,Belong to laser and astronomical adaptive optical technique field,Including solid 1064nm fundamental frequency lasers,Solid 1319nm fundamental frequency lasers,Plane high reflective mirror,Light combination mirror,Assemble globe lens,With frequency crystal,Quasi globe lens and beam splitter,The utility model generates 589nm and frequency laser using solid 1064nm fundamental frequency lasers and solid 1319nm fundamental frequency lasers are non-linear with frequency,Simultaneously,At least one of solid 1064nm fundamental frequency lasers and solid 1319nm fundamental frequency lasers export acousto-optic frequency translation and feed back spectrum continuous laser,It is that spectrum is continuous and frequency laser to promote 589nm and frequency laser,The atmosphere sodium atom using all rates can fully be excited,Realize high brightness,Efficient Sodium guide star light echo,Meet astronomical adaptive optics and white light atom cooling,The applications such as detection of gas,In addition,Whole device simple and compact,It is small,It is easy to maintain.
Description
Technical field
The utility model belongs to laser and astronomical adaptive optical technique field, relates in particular to a kind of solid and frequency sodium
Guiding spectrum continuous laser output device.
Background technology
With the development of laser technology, since the 1980s, world's ground astronomical telescope starts to move towards adaptive
Answer the optical telescope epoch.The correction of telescope adaptive optics need to be obtained big using the bright star near observed object as guiding star
Wavefront distortion information caused by gas, then the wavefront distortion is compensated by real-time feedback control distorting lens, to realize to guiding star
The high-resolution imaging of neighbouring target being observed.Laser guide star technology is proposed by the U.S. earliest, that is, utilizes high power laser light big
The Guide Star that high brightness is generated above gas-bearing formation, to realize the correction to whole day area target.Elevation 80~100km atmospheric electricity
There are abundant sodium atom in absciss layer, excite these sodium atoms that can generate using 589nm wavelength Huang laser resonants strong backwards to glimmering
Light radiation, referred to as laser Sodium guide star.Sodium guide star generates height high (having been approached air top layer), brightness height, is caused to whole air
Wavefront distortion can correct very well, make telescope realize nearly diffraction limit high-resolution.Therefore, laser Sodium guide star system at
For the core devices of self-adaptive optical telescope.And swash as the key of laser Sodium guide star system-high power narrow linewidth Sodium guide star
Light device becomes the hot spot studied both at home and abroad.
The most common excitation wavelength of laser Sodium guide star is the D of sodium atom2Spectral line, wherein again with the stronger superfinishing of absorption cross-section
Thin D2aLine (589.159nm) is best, is secondly D2b" bimodal " continuous spectrum structure is presented in line (589.157nm).It is developed to
The present, the realization means of high power narrow linewidth 589nm Sodium guide star laser mainly have dye laser directly to generate, Solid State Laser is non-linear
Frequency transformation and optical-fiber laser nonlinear frequency transformation method are divided into as continuous wave, continuous locking mold picosecond pulse, microsecond arteries and veins
A variety of working systems such as punching, macro micropulse, nanosecond pulse.And since the absorption of sodium atom is nonlinear, is also easy to produce saturation effect
Answer (D2Line is saturated light intensity about 95.4W/m2), it is desirable that laser peak power density can not be too high, is worked with continuous wave and microsecond pulse
System light echo efficiency is best.But in practical applications, it is influenced by the discrete longitudinal mode spectral signature of conventional laser, Gao Gong
Rate narrow linewidth Sodium guide star laser can only seldom a part of rate of resonant excitation atmosphere sodium atom, the fluorescence light echo efficiency of generation
Still restricted by saturation effect, light echo efficiency it is low.
Utility model content
For various deficiencies of the prior art, to solve the above-mentioned problems, it is proposed that a kind of solid and frequency Sodium guide star spectrum
Continuous laser output device.
To achieve the above object, the utility model provides the following technical solutions：
A kind of solid and frequency Sodium guide star spectrum continuous laser output device, including solid that basic frequency laser outbound course is parallel
1064nm fundamental frequency lasers and solid 1319nm fundamental frequency lasers, and solid 1064nm fundamental frequency lasers and/or solid 1319nm
Fundamental frequency lasers export acousto-optic frequency translation and feed back spectrum continuous laser；
Further include plane high reflective mirror, light combination mirror, assemble globe lens and frequency crystal, quasi globe lens and beam splitter, the conjunction
It is defeated that the center of Shu Jing, convergence globe lens and frequency crystal, quasi globe lens and beam splitter are respectively positioned on solid 1064nm fundamental frequency lasers
It is set gradually in the transmission light path of the 1064nm basic frequency lasers gone out and along the transmission direction of 1064nm basic frequency lasers, the plane
The minute surface center of high reflective mirror is located in the transmission light path of the 1319nm basic frequency lasers of solid 1319nm fundamental frequency lasers output, and its
Minute surface and the angle of the transmission light path of 1319nm basic frequency lasers are 45 °, and the light combination mirror is arranged in parallel with plane high reflective mirror, is used for
1064nm basic frequency lasers and 1319nm basic frequency lasers are closed into beam and form 1064nm and 1319nm basic frequency lasers.
Further, the solid 1064nm fundamental frequency lasers and solid 1319nm fundamental frequency lasers export the narrow line of linear polarization
Wide basic frequency laser.
Further, the preceding minute surface of the plane high reflective mirror is coated with 1319nm high-reflecting films, and it is anti-reflection to be coated with 1319nm for minute surface thereafter
Film.
Further, the preceding minute surface of the light combination mirror is coated with 1064nm anti-reflection films, thereafter minute surface be coated with 1064nm anti-reflection films and
1319nm high-reflecting films.
Further, described and frequency crystal is LBO, KTP, PPLN or PPLT nonlinear crystal, both ends of the surface inclined cut and
Both ends of the surface are coated with 1064nm and 1319nm basic frequency lasers anti-reflection film, 589nm and frequency laser anti-reflection film.
Further, the convergence globe lens and quasi globe lens are plano-convex globe lens or biconvex globe lens, and before the two
Minute surface and rear minute surface are coated with 1064nm and 1319nm basic frequency lasers anti-reflection film, 589nm and frequency laser anti-reflection film.
Further, the preceding minute surface of the beam splitter is coated with 589nm and frequency laser high-reflecting film, 1064nm and 1319nm fundamental frequencies swash
Light anti-reflection film, thereafter minute surface be coated with 1064nm and 1319nm basic frequency laser anti-reflection films.
In addition, the utility model also provides a kind of output side using solid and frequency Sodium guide star spectrum continuous laser output device
Method includes the following steps：
S1：Solid 1064nm fundamental frequency lasers export 1064nm basic frequency lasers, the output of solid 1319nm fundamental frequency lasers
1319nm basic frequency lasers；
S2：1064nm basic frequency lasers reflex to light combination mirror transmitted through light combination mirror, 1319nm basic frequency lasers through plane high reflective mirror
Rear minute surface, 1064nm basic frequency lasers and 1319nm basic frequency lasers close beam in the rear minute surface of light combination mirror and form 1064nm and 1319nm
Basic frequency laser；
S3：After the concentrated globe lens meeting coalescence transmission of 1064nm and 1319nm basic frequency lasers, injection and the realization of frequency crystal are non-
Linear and frequency is converted, and 589nm and frequency laser, non-switched 1064nm and 1319nm basic frequency lasers are exported；
S4：589nm and frequency laser, the non-switched collimated globe lens of 1064nm and 1319nm basic frequency lasers are collimated and are transmitted
Afterwards, it is transmitted at beam splitter；
S5：Non-switched 1064nm and 1319nm basic frequency lasers are transmitted through beam splitter and are exported, and 589nm and frequency laser are through beam splitting
Mirror reflection output, obtains that 589nm spectrum are continuous and frequency laser.
The utility model has the beneficial effects that：
Using solid 1064nm fundamental frequency lasers and solid 1319nm fundamental frequency lasers are non-linear 589nm and frequency are generated with frequency
Laser, meanwhile, it is anti-that at least one of solid 1064nm fundamental frequency lasers and solid 1319nm fundamental frequency lasers export acousto-optic frequency translation
Spectrum continuous laser is presented, it is that spectrum is continuous and frequency laser to promote 589nm and frequency laser, can fully excite and utilize all rates
Atmosphere sodium atom realizes high brightness, efficient Sodium guide star light echo, meets astronomical adaptive optics and white light atom cooling, gas
The applications such as body detection, in addition, whole device simple and compact, small, it is easy to maintain.
Description of the drawings
Fig. 1 is the overall structure diagram of the utility model.
In attached drawing：1- solid 1064nm fundamental frequency lasers, 2- solid 1319nm fundamental frequency lasers, 3- planes high reflective mirror, 4-
Light combination mirror, 5- assemble globe lens, 6- and frequency crystal, 7- quasi globe lens, 8- beam splitters, 9-589nm and frequency laser, 10- and do not turn
1064nm the and 1319nm basic frequency lasers changed.
Specific implementation mode
In order to make those skilled in the art more fully understand the technical solution of the utility model, with reference to the utility model
Attached drawing carries out clear, complete description to the technical solution of the utility model, and based on the embodiment in the application, this field is general
Other similar embodiments that logical technical staff is obtained without making creative work, should all belong to the application
The range of protection.In addition, the direction word mentioned in following embodiment, such as "upper" "lower" " left side " " right side " etc. are only refer to the attached drawing
Direction, therefore, the direction word used be for illustrative and not limiting the utility model create.
Embodiment one：
As shown in Figure 1, a kind of solid and frequency Sodium guide star spectrum continuous laser output device, including basic frequency laser outbound course
Parallel solid 1064nm fundamental frequency lasers 1, plane high reflective mirror 3, light combination mirror 4, assemble ball at solid 1319nm fundamental frequency lasers 2
Lens 5 and frequency crystal 6, quasi globe lens 7 and beam splitter 8.Wherein, solid 1064nm fundamental frequency lasers 1 are for exporting 1064nm
Basic frequency laser, solid 1319nm fundamental frequency lasers 2 are used to export 1319nm basic frequency lasers, meanwhile, solid 1064nm basic frequency lasers
Device 1 and/or solid 1319nm fundamental frequency lasers 2 export acousto-optic frequency translation and feed back spectrum continuous laser, that is to say, that 1064nm fundamental frequencies
At least one is acousto-optic frequency translation feedback spectrum continuous laser for laser and 1319nm basic frequency lasers, both to ensure that non-linear and frequency produces
Raw 589nm and frequency laser 9 is spectrum continuous laser.In addition, the 1064nm basic frequency lasers and 1319nm basic frequency lasers can be with
It is continuous wave or the linear polarization narrow-linewidth laser of pulse, pulse regime can be quasi-continuous μ s long pulses or ns short pulses.
The center of the light combination mirror 4, convergence globe lens 5 and frequency crystal 6, quasi globe lens 7 and beam splitter 8 is respectively positioned on solid
In the transmission light path for the 1064nm basic frequency lasers that body 1064nm fundamental frequency lasers 1 export and along the transmission of 1064nm basic frequency lasers
Direction is set gradually, that is to say, that light combination mirror 4, the optical axis for assembling globe lens 5, frequency crystal 6, quasi globe lens 7 and beam splitter 8
It is overlapped with the transmission light path of 1064nm basic frequency lasers.The minute surface center of the plane high reflective mirror 3 is located at solid 1319nm fundamental frequencies and swashs
In the transmission light path for the 1319nm basic frequency lasers that light device 2 exports, and the folder of its minute surface and the transmission light path of 1319nm basic frequency lasers
Angle is 45 °, meanwhile, the light combination mirror 4 is arranged in parallel with plane high reflective mirror 3, is used for 1064nm basic frequency lasers and 1319nm bases
Frequency laser closes beam and forms 1064nm and 1319nm basic frequency lasers.
The preceding minute surface of the plane high reflective mirror 3 is coated with 1319nm high-reflecting films, and minute surface is coated with 1319nm anti-reflection films thereafter.It is described
The preceding minute surface of light combination mirror 4 is coated with 1064nm anti-reflection films, and minute surface is coated with 1064nm anti-reflection films and 1319nm high-reflecting films thereafter.It is described and
Frequency crystal 6 is LBO, KTP, PPLN or PPLT nonlinear crystal, both ends of the surface inclined cut and both ends of the surface be coated with 1064nm and
1319nm basic frequency lasers anti-reflection film, 589nm and frequency laser anti-reflection film, meanwhile being placed in temperature controlling stove with frequency crystal 6 and adjusting temperature control,
To meet non-linear and frequency phase matching requirement.The convergence globe lens 5 and quasi globe lens 7 are plano-convex globe lens or biconvex
Globe lens, and the preceding minute surface of the two and rear minute surface are coated with 1064nm and 1319nm basic frequency lasers anti-reflection film, 589nm and frequency laser
Anti-reflection film, meanwhile, assemble globe lens 5 and quasi globe lens 7 focal length can design alternative as needed, the focal length both ensured
It is equal.The preceding minute surface of the beam splitter 8 is coated with 589nm and frequency laser high-reflecting film, 1064nm and 1319nm basic frequency lasers increase
Permeable membrane, thereafter minute surface be coated with 1064nm and 1319nm basic frequency laser anti-reflection films.
A kind of output method for solid and frequency Sodium guide star spectrum continuous laser output device includes the following steps：
S1：Solid 1064nm fundamental frequency lasers 1 export 1064nm basic frequency lasers, and solid 1319nm fundamental frequency lasers 2 export
1319nm basic frequency lasers；
S2：1064nm basic frequency lasers reflex to conjunction beam transmitted through light combination mirror 4,1319nm basic frequency lasers through plane high reflective mirror 3
The rear minute surface of mirror 4,1064nm basic frequency lasers and 1319nm basic frequency lasers light combination mirror 4 rear minute surface close beam formed 1064nm and
1319nm basic frequency lasers；
S3：After the concentrated meeting of the globe lens 5 coalescence transmission of 1064nm and 1319nm basic frequency lasers, injection and frequency crystal 6 are realized
Non-linear and frequency is converted, and 589nm and frequency laser 9, non-switched 1064nm and 1319nm basic frequency lasers 10 are exported；
S4：589nm and frequency laser 9,10 collimated globe lens 7 of non-switched 1064nm and 1319nm basic frequency lasers collimation are simultaneously
After transmission, it is transmitted at beam splitter 8；
S5：Non-switched 1064nm and 1319nm basic frequency lasers 10 are transmitted through beam splitter 8 and are exported, and 589nm and frequency laser 9 pass through
The reflection output of beam splitter 8, obtains that 589nm spectrum are continuous and frequency laser, passes through and tunes solid 1064nm fundamental frequency lasers 1, solid
The centre wavelength of 1319nm fundamental frequency lasers 2 realizes continuous 589nm spectrum and frequency laser centre wavelength and atmosphere sodium absorption peak
Precisely align.
Embodiment two：
The present embodiment part identical with embodiment one repeats no more, unlike：
Solid 1064nm basic frequency lasers are Nd:The quasi-continuous hundred μ s long pulses spectrum continuous lasers of YAG, line width 3pm, Gu
Body 1319nm basic frequency lasers are tradition Nd:The quasi-continuous multilongitudianl-mode lasers of YAG, line width 3pm, plane high reflective mirror 3, light combination mirror 4
And the incidence angle of beam splitter 8 is 45 °, assembles the planoconvex spotlight that globe lens 5 and quasi globe lens 7 are focal length 300mm, and
Frequency crystal 6 is KTP nonlinear crystals, and size 3mm × 3mm × 20mm, ends cutting angle is 2 °, and the 589nm and frequency of output swash
Light 9 is spectrum continuous laser.
Embodiment three：
The present embodiment part identical with embodiment two repeats no more, unlike：
Solid 1064nm basic frequency lasers and solid 1319nm basic frequency lasers are Nd:The quasi-continuous hundred μ s long pulse spectrum of YAG
Continuous laser, line width are 3pm, and the 589nm and frequency laser 9 of output are spectrum continuous lasers.
Example IV：
The present embodiment part identical with embodiment two repeats no more, unlike：
Solid 1064nm basic frequency lasers are tradition Nd:The quasi-continuous single longitudinal mode lasers of YAG, line width 3pm, solid 1319nm
Basic frequency laser is Nd:The quasi-continuous hundred μ s long pulses spectrum continuous lasers of YAG, line width 3pm, the 589nm and frequency laser 9 of output
It is spectrum continuous laser.
The utility model is described in detail above, it is described above, only the preferred embodiment of the utility model and
, when the utility model practical range cannot be limited, i.e., all according to the made equivalent changes and modifications of the application range, it all should still belong to this
In utility model covering scope.
Claims (7)
1. a kind of solid and frequency Sodium guide star spectrum continuous laser output device, which is characterized in that including basic frequency laser outbound course
Parallel solid 1064nm fundamental frequency lasers (1) and solid 1319nm fundamental frequency lasers (2), and solid 1064nm fundamental frequency lasers
(1) and/or solid 1319nm fundamental frequency lasers (2) output acousto-optic frequency translation feeds back spectrum continuous laser；
Further include plane high reflective mirror (3), light combination mirror (4), assemble globe lens (5) and frequency crystal (6), quasi globe lens (7) and divide
Shu Jing (8), the light combination mirror (4) are assembled in globe lens (5) and frequency crystal (6), quasi globe lens (7) and beam splitter (8)
The heart is respectively positioned in the transmission light path of the 1064nm basic frequency lasers of solid 1064nm fundamental frequency lasers (1) output and along 1064nm bases
The transmission direction of frequency laser is set gradually, and the minute surface center of the plane high reflective mirror (3) is located at solid 1319nm fundamental frequency lasers
(2) in the transmission light path of the 1319nm basic frequency lasers exported, and the angle of its minute surface and the transmission light path of 1319nm basic frequency lasers
It it is 45 °, the light combination mirror (4) is arranged in parallel with plane high reflective mirror (3), for swashing 1064nm basic frequency lasers and 1319nm fundamental frequencies
Combiner forms 1064nm and 1319nm basic frequency lasers.
2. a kind of solid according to claim 1 and frequency Sodium guide star spectrum continuous laser output device, which is characterized in that institute
It states solid 1064nm fundamental frequency lasers (1) and solid 1319nm fundamental frequency lasers (2) and exports linear polarization narrow linewidth basic frequency laser.
3. a kind of solid according to claim 2 and frequency Sodium guide star spectrum continuous laser output device, which is characterized in that institute
The preceding minute surface for stating plane high reflective mirror (3) is coated with 1319nm high-reflecting films, and minute surface is coated with 1319nm anti-reflection films thereafter.
4. a kind of solid according to claim 2 and frequency Sodium guide star spectrum continuous laser output device, which is characterized in that institute
The preceding minute surface for stating light combination mirror (4) is coated with 1064nm anti-reflection films, and minute surface is coated with 1064nm anti-reflection films and 1319nm high-reflecting films thereafter.
5. a kind of solid according to claim 2 and frequency Sodium guide star spectrum continuous laser output device, which is characterized in that institute
It is LBO, KTP, PPLN or PPLT nonlinear crystal, both ends of the surface inclined cut and both ends of the surface are coated with to state with frequency crystal (6)
1064nm and 1319nm basic frequency lasers anti-reflection film, 589nm and frequency laser anti-reflection film.
6. according to a kind of any described solids of claim 3-5 and frequency Sodium guide star spectrum continuous laser output device, feature
It is, the convergence globe lens (5) and quasi globe lens (7) are plano-convex globe lens or biconvex globe lens, and the preceding minute surface of the two
It is coated with 1064nm and 1319nm basic frequency lasers anti-reflection film, 589nm and frequency laser anti-reflection film with rear minute surface.
7. a kind of solid according to claim 6 and frequency Sodium guide star spectrum continuous laser output device, which is characterized in that institute
The preceding minute surface for stating beam splitter (8) is coated with 589nm and frequency laser high-reflecting film, 1064nm and 1319nm basic frequency laser anti-reflection films, thereafter
Minute surface is coated with 1064nm and 1319nm basic frequency laser anti-reflection films.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820103670.XU CN207946631U (en) | 2018-01-22 | 2018-01-22 | A kind of solid and frequency Sodium guide star spectrum continuous laser output device |
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| CN201820103670.XU CN207946631U (en) | 2018-01-22 | 2018-01-22 | A kind of solid and frequency Sodium guide star spectrum continuous laser output device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108107642A (en) * | 2018-01-22 | 2018-06-01 | 中国工程物理研究院应用电子学研究所 | A kind of solid and frequency Sodium guide star spectrum continuous laser output device and output method |
-
2018
- 2018-01-22 CN CN201820103670.XU patent/CN207946631U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108107642A (en) * | 2018-01-22 | 2018-06-01 | 中国工程物理研究院应用电子学研究所 | A kind of solid and frequency Sodium guide star spectrum continuous laser output device and output method |
| CN108107642B (en) * | 2018-01-22 | 2023-07-14 | 中国工程物理研究院应用电子学研究所 | Solid sum frequency sodium guide star spectrum continuous laser output device and output method |
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