CN110391580A - A kind of caesium Terahertz collimated light source device and system - Google Patents
A kind of caesium Terahertz collimated light source device and system Download PDFInfo
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- CN110391580A CN110391580A CN201810344885.5A CN201810344885A CN110391580A CN 110391580 A CN110391580 A CN 110391580A CN 201810344885 A CN201810344885 A CN 201810344885A CN 110391580 A CN110391580 A CN 110391580A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
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- H01S1/06—Gaseous, i.e. beam masers
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Abstract
The present invention relates to a kind of caesium Terahertz collimated light source device and system, device includes caesium steam pond, pumping source；Wherein pumping source generates the pumping laser of collimation, and caesium steam pond has into window and/or exit window, has caesium steam inside caesium steam pond, pumping laser enters caesium steam pond from window is entered, and enters caesium steam；Caesium steam under the action of pumping laser, generate Terahertz collimated light, and from enter window and/or exit window output.The present invention causes the optical pumping population inversion stimulated radiation in caesium steam by pumping laser, or optical pumping excited electron Raman scattering Stokes output, or optical pumping is excited the output of hyper Stokes to obtain Terahertz collimated light, beam quality is excellent, can be used as the use of thz laser device.
Description
Technical field
The present invention relates to terahertz light source domains, and in particular to a kind of caesium Terahertz collimated light source device and system.
Background technique
The terahertz wave band of electromagnetic wave generally refers to 0.1-3THz frequency band, between far red light and microwave.Too
Hertz light has many unique properties, causes the extensive concern of scientific research circle and industry in recent years.The wavelength of terahertz light
In millimeter magnitude, relative to the object in daily life, wavelength is smaller.Therefore, the transmission of terahertz light can have preferably
Collimation, be similar to visible light.Moreover, terahertz light is for common not aqueous nonmetallic materials, for example, paper, plastics,
Timber, ceramics etc., penetrability with higher, penetrability are more far better than visible light, near infrared light, mid-infrared light etc., because
This can be used for the fields such as safety check scanning imagery.Terahertz light photon energy is low, is not easy ionization material, safer to human body.This
Outside, Terahertz characteristic absorption spectrum can also be used to identify substance classes.
Thz laser device can produce collimation, monochromatic thz laser beam, greatly facilitate the application sides such as imaging, scanning
Formula, for basic scientific research, also bringing great convenience property, is one of most important Terahertz light source.Current Terahertz
Laser have carbon dioxide pumping gas laser, QCL (quanta cascade) laser, synchrotron radiation light source, free-electron laser,
Difference frequency laser, optical parametric oscillator etc..Wherein synchrotron radiation light source, free-electron laser function admirable, but it is with high costs；Two
Carbonoxide pumped gas laser output power is larger, but volume is larger, and debugging is complicated, and wavelength is fixed；QCL laser output work
The lesser continuous laser of rate, light frequency has just been set when leaving the factory out；Difference frequency laser, optical parametric oscillator energy output frequency
Adjustable thz laser, however its device is complex, it is desirable that accurate installation and debugging, to the more demanding of operator.
In conclusion current thz laser device still has many deficiencies, it would be highly desirable to exploitation have light monochromaticjty it is good,
The comprehensive thz laser device of the performances such as frequency is adjustable, the operation is stable or Terahertz collimated light source device and system.
Summary of the invention
In view of the deficiencies in the prior art, the present invention is based on optical pumping principles to disclose a kind of performance is comprehensive, stable caesium too
Hertz collimated light source device, with quantum efficiency height, light monochromaticjty is good, frequency is adjustable, good beam quality, good operating stability out
The advantages that.
To achieve the goals above, technical scheme is as follows:
A kind of caesium Terahertz collimated light source device, which is characterized in that including caesium steam pond and pumping source；
The pumping source generates the pumping laser of collimation, and caesium steam pond has into window and/or exit window, and caesium steam has inside pond
Caesium steam；The pumping laser injects caesium steam pond from window is entered, and enters caesium steam；Effect of the caesium steam in pumping laser
Under, generate Terahertz collimated light, and from enter window and/or exit window output；It is described enter window or exit window at least one use terahertz
Hereby wave band electromagnetic wave transparent material makes.
Based on above scheme, it is further preferred that
The wave frequency of the Terahertz collimated light is located at 0.1-3THz wave band.
Based on above scheme, it is further preferred that
The pumping laser is Single wavelength laser or is that multi-wavelength closes beam formula laser, the pumping laser shape that pumping source issues
Formula is that wavelength meets optical pumping population inversion stimulated radiation in caesium steam or the Raman scattering of optical pumping excited electron or light
The occurrence condition of hyper is excited in pumping.
Based on above scheme, it is further preferred that
Described device further includes that laser resonator to enhance optical pumping population inversion stimulated radiation or optical pumping is excited electricity
Hyper process is excited in sub- Raman scattering or optical pumping.
It is another object of the present invention to provide a kind of light-source system based on above-mentioned caesium Terahertz collimated light source device,
It is characterized in that including caesium Terahertz collimated light source device described in above-mentioned any one scheme.
Based on above scheme, it is further preferred that
Including the system for Terahertz reflection/transmission spectral measurement, the imaging of Terahertz reflection/transmission.
Through the above technical solutions, pumping source starting produces when caesium Terahertz collimated light source device disclosed by the invention works
Raw pumping laser, pumping laser motivate caesium steam.Selecting transition resonance light frequency in Cs atom energy level is precisely in THz wave
The ideal energy level of section to one of (include upper and lower energy level) convey Cs atom to energy level thereon by setting pumping laser wavelength,
And lower energy level is empty, then can get population inversion, set up the i.e. exportable thz laser of resonant cavity.If pump can be arranged
The intensity of Pu laser be it is sufficiently strong, then can cause the excited electron Raman scattering between upper and lower energy level or be excited hyper,
Even if being not provided with resonant cavity at this time, it is also possible to obtain the excellent Terahertz Stokes output of collimation output, beam quality, i.e., it is complete
It can be used as the use of thz laser device entirely.
Detailed description of the invention
For the clearer technical solution for illustrating the embodiment of the present invention or the prior art, to embodiment or will show below
There is attached drawing needed in technical description to do one simply to introduce, it should be apparent that, the accompanying drawings in the following description is only
Some embodiments of the present invention without creative efforts, may be used also for those of ordinary skill in the art
To obtain other drawings based on these drawings.
Fig. 1 is one device figure of the embodiment of the present invention.
Fig. 2 is the signal of one pump mode of the embodiment of the present invention.
Fig. 3 is the signal of two pump mode of the embodiment of the present invention.
Fig. 4 is six device figure of the embodiment of the present invention
Detailed description of main elements: 1: 1-1: caesium steam pond enters window, 1-2: exit window, and 2: pumping source, 3: pumping laser, 4: terahertz
Hereby laser, 4-1: forward direction thz laser, 4-2: backward thz laser, 5: high anti-hysteroscope, 6: output coupling mirror, 7: filtering
Piece.
Specific embodiment
To keep the purposes, technical schemes and advantages of the embodiment of the present invention clearer, below with reference to the embodiment of the present invention
In attached drawing, technical solution in the embodiment of the present invention carries out clear and complete description:
There is multipair ideal energy level pair in Cs atom energy level, each pair of include two transition between energy level meets energy level transition choosing
Select rule, be allowed transition and transition resonance light frequency be precisely in terahertz wave band.Selection a pair as energy level (include
Upper and lower energy level), by setting pumping laser wavelength, Cs atom is conveyed to energy level thereon, and lower energy level is empty, then may be used
Population inversion is obtained, the i.e. exportable thz laser of resonant cavity is set up.If can be arranged pumping laser intensity be it is sufficiently strong,
The excited electron Raman scattering between upper and lower energy level can be caused or be excited hyper, even if being not provided with resonant cavity at this time,
The Terahertz Stokes output that collimation exports, beam quality is excellent can be obtained, i.e. the source of Terahertz collimated light is caesium steaming
Optical pumping population inversion stimulated radiation or the output of optical pumping excited electron Raman scattering Stokes or optical pumping in gas
It is excited the output of hyper Stokes.
Based on above-mentioned technical background, the invention discloses a kind of caesium Terahertz collimated light source devices, comprising: caesium steam pond,
Caesium steam pond can be by fill enough metal caesiums and heating etc. modes to generate caesium steam, and caesium steaming inside it
Gas pond both ends are equipped with into window and/or exit window；Pumping source, to generate the pumping laser of collimation, the pumping laser by enter window into
Enter caesium steam pond, and enter caesium steam, caesium steam generates Terahertz collimated light under the action of pumping laser, and from entering
Window and/or exit window output.At least one in window or exit window that enter is made using terahertz wave band electromagnetic wave transparent material, such as stone
English glass, sapphire (Sapphire), silicon wafer (are only used as exit window).Caesium steam pond includes but is not limited to quartz glass pond, heat pipe
Furnace (pond body can be the materials such as stainless steel).
Based on above scheme, further, the wave frequency of the Terahertz collimated light is located at generally acknowledged be referred to as too
The wave band (0.1-3THz) of hertz light.
Based on above scheme, further, the pumping laser is Single wavelength laser, or closes beam formula for multi-wavelength and swash
Light, the pumping laser form that pumping source issues are that wavelength meets optical pumping population inversion stimulated radiation or light in caesium steam
The occurrence condition of hyper is excited in pumping excited electron Raman scattering or optical pumping.Such as: polychrome pulsed, monochromatic arteries and veins
Rush formula, wavelength great-jump-forward, the continuous light of polychrome.
Based on above scheme, further, described device further includes laser resonator to enhance optical pumping population inversion
Hyper process is excited in stimulated radiation or the Raman scattering of optical pumping excited electron or optical pumping.
The present invention also provides a kind of light-source systems based on above-mentioned caesium Terahertz collimated light source device, it is characterised in that packet
Include caesium Terahertz collimated light source device described in above-mentioned any one scheme.
Based on above scheme, further, the light-source system includes for Terahertz reflection/transmission spectral measurement, too
The system of hertz reflection/transmission imaging.
It is following that scheme of the present invention is described further and is proved with specific embodiment:
A kind of embodiment one: caesium Terahertz collimated light source
Device figure such as Fig. 1 of embodiment one, and working principle is as shown in Figure 2.Caesium steam generating device is in embodiment one
Caesium steam pond 1, for the hydrostatic column manufactured using quartz glass, the diameter of cylindrical body is 20~30mm, length 100mm
Or it is longer, cylindrical body both ends are 1mm thickness silica glass optical window, that is, enter window 1-1 and exit window 1-2, optical window is to pumping
The transmitance of laser is high, also more considerable for the transmitance of terahertz wave band.Enough metal caesiums are filled in caesium steam pond,
Guarantee when heated, the caesium steam of internal gasifier is saturated vapour pressure.Inside caesium steam pond other than caesium steam, other gas are had no
Body.Using an enclosed heating furnace, entire caesium steam pond is heated uniformly to 200 DEG C, even higher temperature, and can guarantee perseverance
Temperature.Pumping source 2 is realized using the two-wavelength dye laser of a Q impulse Nd:YAG laser pumping.Pumping source output
The double-colored pulsed pumping laser 3 of 852nm and 550nm, pulsewidth 3ns, every kind of wavelength components its wavelength can fine-tune respectively, but with
Under still be referred to as 852nm and 550nm ingredient.Every kind of wavelength components of pulse can contain 2E+14 photon.Why using such
Two-color laser pulse is 6 in order to tune each ingredient wavelength difference approximate alignment Cs atom2S1/2→62P3/2Transition absorption, and
62P3/2→112D5/2Transition absorption.After approximation tuning alignment, due to 122P3/2Energy level is almost without Cs atom, then pumping laser 3
Two-photon participation is quickly induced in metal caesium steam is excited super Raman Process, generates efficient 112D5/2→122P3/2Transition
Near resonance oscillating collimated telescope exports (Stokes output), and wave frequency is 1.0THz or so, has similar common laser
Collimation, monochromaticjty, coherence, referred to herein as laser, comprising preceding to thz laser 4-1 and backward thz laser 4-2,
They are practical coaxial with pumping laser 3, indicate clear in figure one, they are drawn the expression that is staggered in parallel.
If the wave frequency using light describes, the 6 of Cs atom can be claimed2S1/2→62P3/2Transition RESONANCE ABSORPTION light frequency is
ν1, 62P3/2→112D5/2Transition RESONANCE ABSORPTION light frequency is ν2, then for pumping laser, 852nm is ν at the frequency tuning divided1
+δ1, 550nm is ν at the frequency tuning divided2+δ2, δ here1, δ2For the quantity of frequency departure Cs atom resonance absorption frequency,
It may be positive or negative value.112D5/2→122P3/2Transition resonant frequency is Terahertz frequency, referred to as ν3, induce and be excited the graceful mistake of overpull
Cheng Hou, the Stokes output frequency of generation are δ1+δ2+ν3, along with the generation that Stokes exports, Cs atom is reached
122P3/2Energy level, whole process meet the conservation of energy.
In practical optical path adjusting, forward direction thz laser 4-1 can cooperate double-colored pumping laser 3 further to steam in caesium
Non-linear four-wave mixing effect is induced in gas, the frequency of four-wave mixing output meets:
(ν1+δ1)+(ν2+δ2)-(δ1+δ2+ν3)=(ν1+ν2-ν3),
12 are generated by this method2P3/2→62S1/2(ν1+ν2-ν3) resonance ultraviolet four-wave mixing output, wavelength is about
335nm is coaxially to export with forward direction thz laser 4-1 and double-colored 3 three of pumping laser, shows that optical path has been adjusted altogether
Good, caesium Terahertz collimated light source is working properly.When 852nm, 550nm in fine tuning pumping laser 3 (change above-mentioned at the wavelength divided
δ1, δ2Value), then based on the tunability for being excited super Raman Process, forward direction thz laser 4-1 and backward thz laser 4-2
Frequency (δ1+δ2+ν3) also can be mobile to high frequency or low frequency therewith.
Embodiment two: the caesium Terahertz collimated light source based on excited electron Raman scattering
The device of embodiment two is the same as example 1, and working principle is as shown in Figure 3.The pumping source 2 of embodiment two exports
The form of pumping laser 3 be same optical axis pulse pair, that is to say, that each pumping source 2 works, and can export a 852nm first
Pulse exports a 550nm pulse again after time T.Each pulse may include 2E+14 photon, and pulsewidth 3ns, wavelength can
It fine-tunes, T is also adjusted, such as is set to 30ns.852nm pulse wavelength is adjusted to be allowed to precisely align Cs atom
62S1/2→62P3/2Transition absorption, at this time in caesium steam pond caesium steam by unpumped section have a large amount of Cs atoms be in 62P3/2Energy level.
Adjust the 550nm pulse wavelength approximate alignment 6 then reached2P3/2→112D5/2Transition absorption, since caesium steam is by pumped region
Still there are a large amount of atoms to be located at 62P3/2Energy level, and 112D5/2、122P3/2Energy level is almost without Cs atom, then 550nm pulse is in caesium steam
Middle induction excited electron Raman scattering, quickly generates efficient 112D5/2→122P3/2Transition Near resonance oscillating collimated telescope exports (Si Tuo
Ke Si output), it is similar to embodiment one, wave frequency is 1.0THz or so, has collimation, the list of similar common laser
Color, coherence, referred to herein as laser, comprising preceding to thz laser 4-1 and backward thz laser 4-2, they are practical
It is coaxial with pumping laser 3, while Cs atom reaches 122P3/2Energy level.
Still using the description as described in wave frequency in embodiment one, then the frequency of 550nm pulse may be configured as ν2+δ2,
After inducing excited electron Raman Process, the Stokes output frequency of generation is δ2+ν3。
When the wavelength of the 550nm pulse in fine tuning pumping laser 3, then based on the tunable of excited electron Raman scattering processes
Property, the frequency (δ of forward direction thz laser 4-1 and backward thz laser 4-22+ν3) can also move therewith.Due to 102D5/2
Energy level starts that also 12 can be induced again almost without Cs atom, forward direction thz laser 4-1 and backward thz laser 4-22P3/2→
102D5/2The population inversion amplified spontaneous emission of Near resonance oscillating and/or the output of excited electron Raman scattering Stokes, electricity
Magnetic wave frequency about 11.7THz, equally have forward and backward component, can its frequency be referred to as ν4。
At this moment, 550nm pulse, 1.0THz forward direction thz laser 4-1 and 122P3/2→102D5/2The grain of Near resonance oscillating
Subnumber inverts amplified spontaneous emission and/or the output of excited electron Raman scattering Stokes is preceding to component, this three's collective effect
In caesium steam, generate non-linear four-wave mixing effect, thus obtain before to it 102D5/2→62P3/2Four wave of Near resonance oscillating visible light is mixed
Frequency exports, and frequency should meet:
(ν2+δ2)-(δ2+ν3)-ν4=(ν2-ν3-ν4),
I.e. four-wave mixing output frequency is (ν2-ν3-ν4), it is converted into wavelength about 564nm, shows that optical path has regulated, caesium
Terahertz collimated light source is working properly.
The caesium Terahertz collimated light source that embodiment three: 1.6THz exports
Embodiment third is that on the basis of example 2, the 550nm pulse in pumping laser 3 is adjusted to 564nm pulse,
It then can get the tunable forward direction thz laser 4-1 and backward thz laser 4-2 near 1.6THz.Realization principle and figure three
It is essentially identical, only in addition to 62P3/2Except three energy levels 112D5/2、122P3/2、102D5/2Successively replace with 102D5/2、
112P3/2、92D5/2, that is to say, that the principal quantum number of the physical process being related to, related energy level all drops one.What optical path was adjusted
Mark is appearance 92D5/2→62P3/2To visible light before the 585nm of Near resonance oscillating.
Example IV: the caesium Terahertz collimated light source of 0.7THz output
Example IV is on the basis of example 2, the 550nm pulse in pumping laser 3 to be adjusted to 541nm pulse,
It then can get the tunable forward direction thz laser 4-1 and backward thz laser 4-2 near 0.7THz.Realization principle and figure three
It is essentially identical, only in addition to 62P3/2Except three energy levels 112D5/2、122P3/2、102D5/2Successively replace with 122D5/2、
132P3/2、112D5/2, that is to say, that the principal quantum number of the physical process being related to, related energy level all rises one.Optical path is adjusted
Mark be appearance 112D5/2→62P3/2To visible light before the 550nm of Near resonance oscillating.
Embodiment five: the caesium Terahertz collimated light source of Single wavelength pumping
For embodiment fifth is that implementing on the basis of embodiment one, realization principle is similar with embodiment one, realization device ginseng
Fig. 1 is examined, principle refers to Fig. 2, changed a kind of pumping laser 3 of embodiment into monochromatic 669nm by double-colored, can fine-tune.Due to 2
The energy of a 669nm photon and a 852nm photon add a 550nm photon energy and almost the same, the then pumping of 669nm
Laser 3 equally can quickly induce the super Raman Process of being excited of two-photon participation in metal caesium steam, and generation is efficient
112D5/2→122P3/2The output of transition Near resonance oscillating collimated telescope, wave frequency are 1.0THz or so, have similar common laser
Collimation, monochromaticjty, coherence, referred to herein as laser, comprising preceding to thz laser 4-1 and backward thz laser 4-
2。
Embodiment six: the caesium Terahertz collimated light source of resonant cavity enhancing
Embodiment adds sixth is that on the device basic that embodiment two provides by high anti-hysteroscope 5 and 6 groups of output coupling mirror
At Terahertz resonant cavity, high anti-hysteroscope 5 and output coupling mirror 6 have high-transmission rate (close to 100%) pumping laser 3, and
Wave band to thz laser 4 is respectively high reflectance (close to 100%) and part reflection, fractional transmission.Optical filter 7 can will pump
Pu laser 3 filters out, and the wave band of thz laser 4 can pass through, to obtain pure thz laser 4.When work, tuning pump
The 852nm ingredient and 550nm ingredient of Pu laser 3 precisely align the 6 of Cs atom2S1/2→62P3/2Transition and 62P3/2→112D5/2Jump
Absorption is moved, T value is the same as embodiment two.After precision tuning alignment, a large amount of Cs atoms are pumped to 112D5/2Energy level, with underlying empty
122P3/2Population inversion is formed between energy level, forms laser generation under the coupling of Terahertz resonant cavity, and output Terahertz swashs
Light 4 filters the pure next step application that can be convenient thz laser 4 through optical filter 7.
Embodiment seven: heat pipe type of furnace caesium Terahertz collimated light source
Seventh is that implementing on the basis of embodiment five, realization principle is the same as example 1 embodiment.Difference is reality
The caesium steam pond applied in example five replaces with heat pipe furnace apparatus.The construction of heat pipe oven is metal tube body, and middle section can be heated at high temperature, two
Side section has recirculated water cooling cooling, and there is optical window at both ends, that is, enter window 1-1 and exit window 1-2, transmission of the optical window to pumping laser
Rate is high, also more considerable for the transmitance of terahertz wave band.It is provided with metal mesh in heat pipe oven, and fills metal caesium, in addition,
The argon gas of about 10torr is also filled with as buffer gas.When heat pipe oven works, the metal caesium high-temperature gasification in middle section flow to two
Side is fallen on metal mesh for the cooling liquid of buffer gas institute, with the capillarity between liquid metal caesium and metal mesh, so that liquid
State metal caesium, which flows back into middle section, to be continued to gasify, and ultimately forms stable circulation, obtains stable and uniform in the middle section of heat pipe oven
Caesium steam column enters window 1-1 and exit window 1-2 not by the erosion of caesium steam, energy simultaneously as buffer gas efficiently cools down caesium steam
Cleaning is kept, the service life is long.Compared with the vitreous silica pond in embodiment one, the heating temperature of heat pipe oven up to 1000 DEG C with
On, caesium vapor atomic number density can greatly promote, at this point, the energy of pumping laser 3 may be set to be bigger value, forward direction is too
Hertz laser 4-1 and backward thz laser 4-2 output energy also rises significantly therewith.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (6)
1. a kind of caesium Terahertz collimated light source device, which is characterized in that including caesium steam pond and pumping source；
The pumping source generates the pumping laser of collimation, and caesium steam pond has into window and/or exit window, and caesium steam has caesium steaming inside pond
Gas；The pumping laser injects caesium steam pond from window is entered, and enters caesium steam；The caesium steam under the action of pumping laser,
Generate Terahertz collimated light, and from enter window and/or exit window output；It is described enter window or exit window at least one use THz wave
Section electromagnetic wave transparent material production.
2. caesium Terahertz collimated light source device according to claim 1, which is characterized in that the electricity of the Terahertz collimated light
Magnetic wave frequency is located at 0.1-3THz wave band.
3. caesium Terahertz collimated light source device according to claim 1, which is characterized in that
The pumping laser is Single wavelength laser or is that multi-wavelength closes beam formula laser, and the pumping laser form that pumping source issues is
Wavelength meets optical pumping population inversion stimulated radiation in caesium steam or the Raman scattering of optical pumping excited electron or optical pumping
It is excited the occurrence condition of hyper.
4. caesium Terahertz collimated light source device according to claim 1 to 3, which is characterized in that
Described device further includes that laser resonator is drawn with enhancing optical pumping population inversion stimulated radiation or optical pumping excited electron
Hyper process is excited in graceful scattering or optical pumping.
5. a kind of light-source system based on above-mentioned caesium Terahertz collimated light source device, it is characterised in that including in claim 1-4
Caesium Terahertz collimated light source device described in any one scheme.
6. light-source system according to claim 5, it is characterised in that including for Terahertz reflection/transmission spectral measurement,
The system of Terahertz reflection/transmission imaging.
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| CN111009817A (en) * | 2020-03-11 | 2020-04-14 | 蓝科微电子(深圳)有限公司 | Terahertz laser based on electromagnetic induction thermal excitation |
| CN111029889A (en) * | 2020-03-11 | 2020-04-17 | 蓝科微电子(深圳)有限公司 | Terahertz laser based on single high-temperature heat source |
| CN111431018A (en) * | 2020-02-17 | 2020-07-17 | 蓝科微电子(深圳)有限公司 | Terahertz laser based on double constant-temperature heat source equipment |
| CN112563874A (en) * | 2020-11-27 | 2021-03-26 | 南京大学 | Room temperature light-excited zinc oxide phonon vibration terahertz laser |
| CN112701554A (en) * | 2020-12-25 | 2021-04-23 | 中国航天科工集团第二研究院 | Terahertz wave generation method and system based on rydberg atom excitation four-wave mixing |
| CN114421260A (en) * | 2021-12-08 | 2022-04-29 | 中国航天科工集团第二研究院 | Terahertz wave generation system and method |
| CN114498270A (en) * | 2022-02-07 | 2022-05-13 | 中国工程物理研究院激光聚变研究中心 | Optical pumping terahertz gas laser |
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