CN110021869A - A kind of three-dimensional optical parametric oscillation terahertz radiation source - Google Patents
A kind of three-dimensional optical parametric oscillation terahertz radiation source Download PDFInfo
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- 230000003287 optical effect Effects 0.000 title claims abstract description 75
- 230000005855 radiation Effects 0.000 title claims abstract description 20
- 230000010355 oscillation Effects 0.000 title claims abstract description 19
- 239000013078 crystal Substances 0.000 claims abstract description 180
- 229910003327 LiNbO3 Inorganic materials 0.000 claims abstract description 160
- 238000005086 pumping Methods 0.000 claims abstract description 28
- 230000000694 effects Effects 0.000 claims description 41
- 230000003321 amplification Effects 0.000 claims description 15
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 15
- 230000000644 propagated effect Effects 0.000 claims 2
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000004891 communication Methods 0.000 description 3
- 238000000862 absorption spectrum Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
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- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 238000005842 biochemical reaction Methods 0.000 description 1
- 238000002059 diagnostic imaging Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 230000005670 electromagnetic radiation Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
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- 239000000463 material Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/35—Non-linear optics
- G02F1/353—Frequency conversion, i.e. wherein a light beam is generated with frequency components different from those of the incident light beams
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/35—Non-linear optics
- G02F1/39—Non-linear optics for parametric generation or amplification of light, infrared or ultraviolet waves
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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
- H01S1/00—Masers, i.e. devices using stimulated emission of electromagnetic radiation in the microwave range
- H01S1/02—Masers, i.e. devices using stimulated emission of electromagnetic radiation in the microwave range solid
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/35—Non-linear optics
- G02F1/39—Non-linear optics for parametric generation or amplification of light, infrared or ultraviolet waves
- G02F1/392—Parametric amplification
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- Optics & Photonics (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
Abstract
The invention discloses a kind of three-dimensional optical parametric oscillation terahertz radiation sources, including pumping source, MgO:LiNbO3Crystal, pump light recover, and be arranged in MgO:LiNbO3Reflecting mirror around crystal；The plane of first pump light and the tenth pumping light propagation is plane determined by X-axis and Y-axis, plane of the Z axis perpendicular to the first pump light and the tenth pumping light propagation, the direction of propagation for the pump light being emitted from pumping source is X-axis negative sense, and the direction of propagation of THz wave is that Y-axis is positive.Three-dimensional optical parametric oscillation terahertz radiation source provided by the invention has the advantage that pump light is recycled, and can produce multi beam THz wave, effectively improves THz wave energy.By changing the angle between pump light and Stokes light, the THz wave of available frequency tuning.Tuning manner is simple, flexible operation.THz wave is perpendicular to MgO:LiNbO3Crystal outgoing, does not need any output coupler, effectively reduces THz wave output loss.
Description
Technical field
The invention belongs to THz wave applied technical fields, and in particular to a kind of three-dimensional optical parametric oscillation Terahertz amplitude
Penetrate source.
Background technique
THz wave (Terahertz, abbreviation THz) refers to frequency in 0.1-10THz (1THz=1012THz) in range
Electromagnetic wave, wave band are located in electromagnetic spectrum between millimeter wave and infrared ray, are photonics with electronics, macroscopic theory to microcosmic
Theoretical transitional region.Specific position locating for THz wave makes it in physics, chemistry, astronomy, molecular spectrum, life science
With basic research field and medical imaging, environmental monitoring, material tests, food inspection, radio astronomy, the shifting such as medical science
Before the Applied research fields such as dynamic communication, satellite communication and military radar have great scientific research value and wide application
Scape.THz wave is mainly used in following field:
(1) imaging field can directly measure the electricity of transient state caused by Terahertz electromagnetic pulse using terahertz time-domain spectroscopic technology
Magnetic field can directly measure the dielectric constant of sample.
(2) technological field of biochemistry is in Terahertz frequency range due to the rotation absorption spectra of many large biological molecules, utilizes
To the molecular motion condition information in the available reaction of research of biochemical reaction Terahertz absorption spectra.For further postgraduate
Change reaction and provides strong means.
(3) in universe, a large amount of substance is issuing terahertz electromagnetic wave in astronomy field.Carbon (C), water (H2O), an oxygen
Change carbon (CO), nitrogen (N2), oxygen (O2) etc. a large amount of molecule can be detected in Terahertz frequency range.
(4) communications field THz wave is good wide-band-message carrier, can carry audio frequency or vision signal carries out
Transmission.For THz wave for communicating the wireless transmission speed that can obtain 10GB/s, this is more several hundred fastly than current super-broadband tech
To more than 1,000 times.
(5) Homeland Security field is in Homeland Security field, unionized and strong penetrability due to THz wave, so
It can provide remote, big model to dangerous goods such as hiding explosive, contraband, weapon, drugs on airport, station and other places
The early warning enclosed.
What is lacked can generate high power, high quality, efficient THz wave, and low cost and can operate at room temperature
THz source be the main problem faced at present.The production method of THz wave mainly has electronics method and photonics at present
Method.Electronics method is that the wavelength of electromagnetic radiation is generally extended to terahertz wave band from millimeter wave, is also equivalent to one
The process that frequency becomes larger, but very big obstacle can be encountered when frequency is greater than 1THz, so that efficiency becomes very low, while electricity
The terahertz radiation source that sub- method generates is bulky, limits its application in many fields.And photonics method
Its Main way is exactly that visible light or infrared light are converted to terahertz wave band.The advantage of the method is the Terahertz generated
Radiation source has very high coherence and directionality, but the THz wave power and efficiency that generate at this stage are all lower.
Summary of the invention
The object of the present invention is to provide a kind of three-dimensional optical parametric oscillation terahertz radiation sources, to solve existing terahertz
The problems such as hereby wave power is low, low efficiency.
The object of the present invention is achieved in the following manner:
A kind of three-dimensional optical parametric oscillation terahertz radiation source, including pumping source, MgO:LiNbO3Crystal, pump light recycling
Device, and be arranged in MgO:LiNbO3Reflecting mirror around crystal；
The pump light being emitted from pumping source becomes incidence MgO:LiNbO after the first pump light after the reflection of the first reflecting mirror3Crystal,
The first Stokes light and THz wave are generated through optical parameter effect, the first pump light is in MgO:LiNbO3It is all-trans in crystal
Become the tenth pump light after penetrating, the tenth pump light is in MgO:LiNbO3The tenth Stokes is generated through optical parameter effect in crystal
Light；Generate the first Stokes light and the tenth Stokes light by the 19th reflecting mirror and the second eighteen incompatibilities penetrate microscope group at resonance
Resonance amplifies in chamber, and the THz wave of generation is perpendicular to MgO:LiNbO3The surface of crystal is emitted；First pump light and first
The plane that Stokes light, the tenth Stokes light form is parallel to coordinate surface X-Y plane, from MgO:LiNbO3The tenth of crystal outgoing
Pump light becomes the 11st pump light after the tenth reflecting mirror and the reflection of the 11st reflecting mirror, and incidence MgO:LiNbO again3It is brilliant
Body；
11st pump light incidence MgO:LiNbO3Crystal generates the 11st Stokes light and Terahertz through optical parameter effect
Wave, the 11st pump light is in MgO:LiNbO3Become the second pump light after being totally reflected in crystal, the second pump light is in MgO:
LiNbO3The 2nd Stokes light is generated through optical parameter effect in crystal；The 2nd Stokes light and the 11st Stokes light generated
Resonance amplifies in the resonant cavity being made of the 20th reflecting mirror and the 29th reflecting mirror, the THz wave of generation perpendicular to
MgO:LiNbO3The surface of crystal is emitted, the plane of the 11st pump light and the 2nd Stokes light, the 11st Stokes light composition
It is not parallel with coordinate surface X-Y plane, and two plane intersection lines are the wave vector direction of THz wave；From MgO:LiNbO3Crystal outgoing
Second pump light becomes third pump light after the second reflecting mirror and the reflection of third reflecting mirror, and incidence MgO:LiNbO again3It is brilliant
Body；
Third pump light incidence MgO:LiNbO3Crystal generates the 3rd Stokes light and THz wave through optical parameter effect, the
Three pump lights are in MgO:LiNbO3Become 12 pump lights after being totally reflected in crystal, the 12nd pump light is in MgO:LiNbO3
The 12nd Stokes light is generated through optical parameter effect in crystal；Generate the 3rd Stokes light and the 12nd Stokes light by
Resonance amplification in the resonant cavity of 21st reflecting mirror and the 30th reflecting mirror composition, the THz wave of generation is perpendicular to MgO:
LiNbO3The surface of crystal is emitted；The plane and coordinate of third pump light and the 3rd Stokes light, the 12nd Stokes light composition
Face X-Y plane is not parallel, and two plane intersection lines are the wave vector direction of THz wave；From MgO:LiNbO3The 12nd of crystal outgoing
Pump light becomes the 13rd pump light after being reflected from the tenth two-mirror and the 13rd reflecting mirror, and incidence MgO again:
LiNbO3Crystal；
13rd pump light incidence MgO:LiNbO3Crystal generates the 13rd Stokes light and Terahertz through optical parameter effect
Wave, the 13rd pump light is in MgO:LiNbO3Become the 4th pump light after being totally reflected in crystal, the 4th pump light is in MgO:
LiNbO3The 4th Stokes light is generated through optical parameter effect in crystal；The 4th Stokes light and the 13rd Stokes light generated
Resonance amplifies in the resonant cavity being made of the 20th two-mirror and the 31st reflecting mirror, the THz wave of generation perpendicular to
MgO:LiNbO3The surface of crystal is emitted；The plane of 13rd pump light and the 4th Stokes light, the 13rd Stokes light composition
It is not parallel with coordinate surface X-Y plane, and two plane intersection lines are the wave vector direction of THz wave；From MgO:LiNbO3Crystal outgoing
4th pump light becomes the 5th pump light after being reflected from the 4th reflecting mirror and the 5th reflecting mirror, and incidence MgO:LiNbO again3
Crystal；
5th pump light incidence MgO:LiNbO3Crystal generates the 5th Stokes light and THz wave through optical parameter effect, the
Five pump lights are in MgO:LiNbO3Become the 14th pump light after being totally reflected in crystal, the 14th pump light is in MgO:
LiNbO3The 14th Stokes light is generated through optical parameter effect in crystal；The 5th Stokes light and the 14th Stokes generated
Light resonance in the resonant cavity being made of the 23rd reflecting mirror and the 30th two-mirror amplifies, and the THz wave of generation is vertical
In MgO:LiNbO3The surface of crystal is emitted；The plane of 5th pump light and the 5th Stokes light, the 14th Stokes light composition
It is not parallel with coordinate surface X-Y plane, and two plane intersection lines are the wave vector direction of THz wave；From MgO:LiNbO3Crystal outgoing
14th pump light becomes the 15th pump light after being reflected from the 14th reflecting mirror and the 15th reflecting mirror, and incident again
MgO:LiNbO3Crystal；
15th pump light incidence MgO:LiNbO3Crystal generates the 15th Stokes light and Terahertz through optical parameter effect
Wave, the 15th pump light is in MgO:LiNbO3Become the 6th pump light after being totally reflected in crystal, the 6th pump light is in MgO:
LiNbO3The 6th Stokes light is generated through optical parameter effect in crystal；The 6th Stokes light and the 15th Stokes light generated
Resonance amplifies in the resonant cavity being made of the 24th reflecting mirror and the 33rd reflecting mirror, the THz wave of generation perpendicular to
MgO:LiNbO3The surface of crystal is emitted；The plane of 15th pump light and the 6th Stokes light, the 15th Stokes light composition
It is not parallel with coordinate surface X-Y plane, and two plane intersection lines are the wave vector direction of THz wave；From MgO:LiNbO3Crystal outgoing
6th pump light becomes the 7th pump light after being reflected from the 6th reflecting mirror and the 7th reflecting mirror, and incidence MgO:LiNbO again3
Crystal；
7th pump light incidence MgO:LiNbO3Crystal generates the 7th Stokes light and THz wave through optical parameter effect, the
Seven pump lights are in MgO:LiNbO3Become the 16th pump light after being totally reflected in crystal, the 16th pump light is in MgO:
LiNbO3The 16th Stokes light is generated through optical parameter effect in crystal；The 7th Stokes light and the 16th Stokes generated
Light resonance in the resonant cavity being made of the 25th reflecting mirror and the 34th reflecting mirror amplifies, and the THz wave of generation is vertical
In MgO:LiNbO3The surface of crystal is emitted；The plane of 7th pump light and the 7th Stokes light, the 16th Stokes light composition
It is not parallel with coordinate surface X-Y plane, and two plane intersection lines are the wave vector direction of THz wave；From MgO:LiNbO3Crystal outgoing
16th pump light becomes the 17th pump light after being reflected from the 16th reflecting mirror and the 17th reflecting mirror, and incident again
MgO:LiNbO3Crystal；
17th pump light incidence MgO:LiNbO3Crystal generates the 17th Stokes light and Terahertz through optical parameter effect
Wave, the 17th pump light is in MgO:LiNbO3Become the 8th pump light after being totally reflected in crystal, the 8th pump light is in MgO:
LiNbO3The 8th Stokes light is generated through optical parameter effect in crystal.The 8th Stokes light and the 17th Stokes light generated
Resonance amplifies in the resonant cavity being made of the 26th reflecting mirror and the 35th reflecting mirror, the THz wave of generation perpendicular to
MgO:LiNbO3The surface of crystal is emitted；The plane of 17th pump light and the 8th Stokes light, the 17th Stokes light composition
It is not parallel with coordinate surface X-Y plane, and two plane intersection lines are the wave vector direction of THz wave；From MgO:LiNbO3Crystal outgoing
8th pump light becomes the 9th pump light after being reflected from the 8th reflecting mirror and the 9th reflecting mirror, and incidence MgO:LiNbO again3
Crystal；
9th pump light incidence MgO:LiNbO3Crystal generates the 9th Stokes light and THz wave through optical parameter effect, the
Nine pump lights are in MgO:LiNbO3Become the 18th pump light after being totally reflected in crystal, the 18th pump light is in MgO:
LiNbO3The 18th Stokes light is generated through optical parameter effect in crystal；The 9th Stokes light and the 18th Stokes generated
Light resonance in the resonant cavity being made of the 27th reflecting mirror and the 36th reflecting mirror amplifies, and the THz wave of generation is vertical
In MgO:LiNbO3The surface of crystal is emitted；The plane of 9th pump light and the 9th Stokes light, the 18th Stokes light composition
It is not parallel with coordinate surface X-Y plane, and two plane intersection lines are the wave vector direction of THz wave；From MgO:LiNbO3Crystal outgoing
18th pump light enters pump light recover after eighteen incompatibilities penetrate mirror reflection；
The plane of first pump light and the tenth pumping light propagation is plane determined by X-axis and Y-axis, and Z axis is perpendicular to the first pumping
The plane of light and the tenth pumping light propagation, the direction of propagation for the pump light being emitted from pumping source are X-axis negative sense, the biography of THz wave
Broadcasting direction is that Y-axis is positive.
The pumping source be pulse laser, wavelength 1064nm, repetition rate 10Hz, single pulse energy 200mJ,
The polarization direction of pump light is Z axis.
First reflecting mirror, the second reflecting mirror, third reflecting mirror, the 4th reflecting mirror, the 5th reflecting mirror, the 6th reflection
Mirror, the 7th reflecting mirror, the 8th reflecting mirror, the 9th reflecting mirror, the tenth reflecting mirror, the 11st reflecting mirror, the tenth two-mirror, the tenth
Three reflecting mirrors, the 14th reflecting mirror, the 15th reflecting mirror, the 16th reflecting mirror, the 17th reflecting mirror, eighteen incompatibilities penetrate mirror,
19 reflecting mirrors, the 20th reflecting mirror, the 21st reflecting mirror, the 20th two-mirror, the 23rd reflecting mirror, the 24th
Reflecting mirror, the 25th reflecting mirror, the 26th reflecting mirror, the 27th reflecting mirror, the second eighteen incompatibilities penetrate mirror, the 29th instead
Penetrate mirror, the 30th reflecting mirror, the 31st reflecting mirror, the 30th two-mirror, the 33rd reflecting mirror, the 34th reflection
Mirror, the 36th reflecting mirror of the 35th reflecting mirror are plane mirror, and adjustable angle.
First reflecting mirror, the second reflecting mirror, third reflecting mirror, the 4th reflecting mirror, the 5th reflecting mirror, the 6th reflection
Mirror, the 7th reflecting mirror, the 8th reflecting mirror, the 9th reflecting mirror, the tenth reflecting mirror, the 11st reflecting mirror, the tenth two-mirror, the tenth
Three reflecting mirrors, the 14th reflecting mirror, the 15th reflecting mirror, the 16th reflecting mirror, the 17th reflecting mirror, eighteen incompatibilities penetrate mirror to wave
The pumping light total reflection of a length of 1064nm, the 19th reflecting mirror, the 20th reflecting mirror, the 21st reflecting mirror, the 22nd are instead
Penetrate mirror LM4, it is the 23rd reflecting mirror, the 24th reflecting mirror, the 25th reflecting mirror, the 26th reflecting mirror, the 27th anti-
Penetrate mirror, the second eighteen incompatibilities penetrate mirror, the 29th reflecting mirror, the 30th reflecting mirror, the 31st reflecting mirror, the 32nd reflection
Mirror, the 33rd reflecting mirror, the 34th reflecting mirror, the 36th reflecting mirror of the 35th reflecting mirror exist to wave-length coverage
Stoke light total reflection in 1064-1100nm.
Second pump light and the 2nd Stokes light, third pump light and the 3rd Stokes light, the 4th pump light and
Four Stokes light, the 5th pump light and the 5th Stokes light, the 6th pump light and the 6th Stokes light, the 7th pump light and the 7th
Stokes light, the 8th pump light and the 8th Stokes light, the projection of the 9th pump light and the 9th Stokes light on Z axis are in Z
The positive axis of axis.
The MgO:LiNbO3The optical axis of crystal is isosceles trapezoid, two interior angles of isosceles trapezoid in X-Y plane along Z axis
Respectively 64.2 ° and 115.8 °, guarantee THz wave perpendicular to MgO:LiNbO3Plane of crystal outgoing.
The MgO:LiNbO3The waist edge length of crystal is 20mm, and upper bottom edge length is 37.4mm, and bottom edge lengths are
20mm, along Z axis with a thickness of 50mm.
First pump light, the second pump light, third pump light, the 4th pump light, the 5th pump light, the 6th pumping
Light, the 7th pump light, the 8th pump light, the 9th pump light, the tenth pump light, the 11st pump light, the 12nd pump light, the tenth
Three pump lights, the 14th pump light, the 15th pump light, the 16th pump light, the 17th pump light, the 18th pump light,
One Stokes light, the 2nd Stokes light, the 3rd Stokes light, the 4th Stokes light, the 5th Stokes light, the 6th Stokes light,
7th Stokes light, the 8th Stokes light, the 9th Stokes light, the tenth Stokes light, the 11st Stokes light, the 12nd
Stokes light, the 13rd Stokes light, the 14th Stokes light, the 15th Stokes light, the 16th Stokes light, the 17th
Stokes light, the 18th Stokes light are in MgO:LiNbO3Brilliant intracorporal total reflection point is same point, as THz wave
Eye point.
First pump light, the first Stokes light and the tenth Stokes light composition plane and coordinate surface X-Y plane it
Between angle be α1, the plane and coordinate surface X-Y plane of the second pump light, the 2nd Stokes light and the 11st Stokes light composition
Between angle be α2, third pump light, the plane of the 3rd Stokes light and the 12nd Stokes light composition and coordinate surface X-Y are flat
Angle between face is α3, the plane and coordinate surface X-Y of the 4th pump light, the 4th Stokes light and the 13rd Stokes light composition
Angle between plane is α4, the plane and coordinate surface of the 5th pump light, the 5th Stokes light and the 14th Stokes light composition
Angle between X-Y plane is α5, the plane and coordinate of the 6th pump light, the 6th Stokes light and the 15th Stokes light composition
Angle between the X-Y plane of face is α6, the plane and seat of the 7th pump light, the 7th Stokes light and the 16th Stokes light composition
Angle between the X-Y plane of mark face is α7, the 8th pump light, the 8th Stokes light and the 17th Stokes light composition plane with
Angle between coordinate surface X-Y plane is α8, the plane of the 9th pump light, the 9th Stokes light and the 18th Stokes light composition
Angle between coordinate surface X-Y plane is α9, α1Equal to 0 °, α1、α2、α3、α4、α5、α6、α7、α8、α9It is sequentially increased, α9It is less than
20°。
Angle between first pump light and the first Stokes light is θ1, the second pump light and the 2nd Stokes light it
Between angle be θ2, the angle between third pump light and the 3rd Stokes light is θ3, the 4th pump light and the 4th Stokes light it
Between angle be θ4, the angle between the 5th pump light and the 5th Stokes light is θ5, the 6th pump light and the 6th Stokes light it
Between angle be θ6, the angle between the 7th pump light and the 7th Stokes light is θ7, the 8th pump light and the 8th Stokes light it
Between angle be θ8, the angle between the 9th pump light and the 9th Stokes light is θ9, θ1、θ2、θ3、θ4、θ5、θ6、θ7、θ8、θ9?
It is equal.
Compared with the existing technology, three-dimensional optical parametric oscillation terahertz radiation source provided by the invention is based on existing
The terahertz emission source of difference frequency or parametric effect is compared, and is had the advantage that
(1) pump light is recycled, and can produce multi beam THz wave, effectively improves THz wave energy.
(2) by changing the angle between pump light and Stokes light, the THz wave of available frequency tuning.Tuning
Mode is simple, flexible operation.
(3) THz wave is perpendicular to MgO:LiNbO3Crystal outgoing, does not need any output coupler, effectively reduces too
Hertz wave output loss.
Detailed description of the invention
Fig. 1 is the structure principle chart of the embodiment of the present invention.
Fig. 2 is MgO:LiNbO3Pump light, Stokes light and THz wave phase matched schematic diagram in crystal, k in figurep、
ks、kTThe respectively wave vector of pump light, Stokes light, THz wave, the angle θ are pump light wave vector kpK is sweared with Stokes light wavesIt
Between angle.
Specific embodiment
As shown in Figs. 1-2, a kind of three-dimensional optical parametric oscillation terahertz radiation source, including pumping source 1, MgO:LiNbO3
Crystal 2, pump light recover 4, and be arranged in MgO:LiNbO3Reflecting mirror around crystal 2；
The pump light being emitted from pumping source 1 is through the first reflecting mirror Lm1Become the first pump light L after reflectionp1Incidence MgO afterwards:
LiNbO3Crystal 2 generates the first Stokes light L through optical parameter effects1With THz wave 3, the first pump light Lp1In MgO:
LiNbO3Become the tenth pump light R after being totally reflected in crystal 2p1, the tenth pump light Rp1In MgO:LiNbO3Through light in crystal 2
It learns parametric effect and generates the tenth Stokes light Rs1.The first Stokes light L generateds1With the tenth Stokes light Rs1By the 19th
Reflecting mirror LM1Mirror R is penetrated with the second eighteen incompatibilitiesM1Resonance amplifies in the resonant cavity of composition, and the THz wave 3 of generation is perpendicular to MgO:
LiNbO3The surface of crystal 2 is emitted；First pump light Lp1With the first Stokes light Ls1, the tenth Stokes light Rs1The plane of composition
It is parallel to coordinate surface X-Y plane, from MgO:LiNbO3The tenth pump light R that crystal 2 is emittedp1Through the tenth reflecting mirror Rm1With the 11st
Reflecting mirror Rm2Become the 11st pump light R after reflectionp2, and incidence MgO:LiNbO again3Crystal 2；
11st pump light Rp2Incident MgO:LiNbO3Crystal 2 generates the 11st Stokes light R through optical parameter effects2Too
The 3, the 11st pump light R of Hertz wavep2In MgO:LiNbO3Become the second pump light L after being totally reflected in crystal 2p2, the second pump
Pu light Lp2In MgO:LiNbO3The 2nd Stokes light L is generated through optical parameter effect in crystal 2s2；The 2nd Stokes light generated
Ls2With the 11st Stokes light Rs2By the 20th reflecting mirror LM2With the 29th reflecting mirror RM2Resonance is put in the resonant cavity of composition
Greatly, the THz wave 3 of generation is perpendicular to MgO:LiNbO3The surface of crystal 2 is emitted, the 11st pump light Rp2With the 2nd Stokes
Light Ls2, the 11st Stokes light Rs2The plane of composition and coordinate surface X-Y plane are not parallel, and two plane intersection lines are THz wave 3
Wave vector direction；From MgO:LiNbO3The second pump light L that crystal 2 is emittedp2Through the second reflecting mirror Lm2With third reflecting mirror Lm3Instead
Become third pump light L after penetratingp3, and incidence MgO:LiNbO again3Crystal 2；
Third pump light Lp3Incident MgO:LiNbO3Crystal 2 generates the 3rd Stokes light L through optical parameter effects3And Terahertz
Wave 3, third pump light Lp3In MgO:LiNbO3Become 12 pump light R after being totally reflected in crystal 2p3, the 12nd pump light
Rp3In MgO:LiNbO3The 12nd Stokes light R is generated through optical parameter effect in crystal 2s3；The 3rd Stokes light L generateds3
With the 12nd Stokes light Rs3By the 21st reflecting mirror LM3With the 30th reflecting mirror RM3Resonance is put in the resonant cavity of composition
Greatly, the THz wave 3 of generation is perpendicular to MgO:LiNbO3The surface of crystal 2 is emitted；Third pump light Lp3With the 3rd Stokes light
Ls3, the 12nd Stokes light Rs3The plane of composition and coordinate surface X-Y plane are not parallel, and two plane intersection lines are THz wave 3
Wave vector direction；From MgO:LiNbO3The 12nd pump light R that crystal 2 is emittedp3By the tenth two-mirror Rm3With the 13rd reflection
Mirror Rm4Become the 13rd pump light R after reflectionp4, and incidence MgO:LiNbO again3Crystal 2；
13rd pump light Rp4Incident MgO:LiNbO3Crystal 2 generates the 13rd Stokes light R through optical parameter effects4Too
The 3, the 13rd pump light R of Hertz wavep4In MgO:LiNbO3Become the 4th pump light L after being totally reflected in crystal 2p4, the 4th pump
Pu light Lp4In MgO:LiNbO3The 4th Stokes light L is generated through optical parameter effect in crystal 2s4；The 4th Stokes light generated
Ls4With the 13rd Stokes light Rs4By the 20th two-mirror LM4With the 31st reflecting mirror RM4Resonance in the resonant cavity of composition
Amplification, the THz wave 3 of generation is perpendicular to MgO:LiNbO3The surface of crystal 2 is emitted；13rd pump light Rp4With the 4th
Stokes light Ls4, the 13rd Stokes light Rs4The plane of composition and coordinate surface X-Y plane are not parallel, and two plane intersection lines are too
The wave vector direction of Hertz wave 3；From MgO:LiNbO3The 4th pump light L that crystal 2 is emittedp4By the 4th reflecting mirror Lm4It is anti-with the 5th
Penetrate mirror Lm5Become the 5th pump light L after reflectionp5, and incidence MgO:LiNbO again3Crystal 2；
5th pump light Lp5Incident MgO:LiNbO3Crystal 2 generates the 5th Stokes light L through optical parameter effects5And Terahertz
Wave 3, the 5th pump light Lp5In MgO:LiNbO3Become the 14th pump light R after being totally reflected in crystal 2p5, the 14th pumping
Light Rp5In MgO:LiNbO3The 14th Stokes light R is generated through optical parameter effect in crystal 2s5；The 5th Stokes light generated
Ls5With the 14th Stokes light Rs5By the 23rd reflecting mirror LM5With the 30th two-mirror RM5Resonance in the resonant cavity of composition
Amplification, the THz wave 3 of generation is perpendicular to MgO:LiNbO3The surface of crystal 2 is emitted；5th pump light Lp5With the 5th Stokes
Light Ls5, the 14th Stokes light Rs5The plane of composition and coordinate surface X-Y plane are not parallel, and two plane intersection lines are THz wave 3
Wave vector direction；From MgO:LiNbO3The 14th pump light R that crystal 2 is emittedp5By the 14th reflecting mirror Rm5It is anti-with the 15th
Penetrate mirror Rm6Become the 15th pump light R after reflectionp6, and incidence MgO:LiNbO again3Crystal 2；
15th pump light Rp6Incident MgO:LiNbO3Crystal 2 generates the 15th Stokes light R through optical parameter effects6Too
The 3, the 15th pump light R of Hertz wavep6In MgO:LiNbO3Become the 6th pump light L after being totally reflected in crystal 2p6, the 6th pump
Pu light Lp6In MgO:LiNbO3The 6th Stokes light L is generated through optical parameter effect in crystal 2s6；The 6th Stokes light generated
Ls6With the 15th Stokes light Rs6By the 24th reflecting mirror LM6With the 33rd reflecting mirror RM6Resonance in the resonant cavity of composition
Amplification, the THz wave 3 of generation is perpendicular to MgO:LiNbO3The surface of crystal 2 is emitted；15th pump light Rp6With the 6th
Stokes light Ls6, the 15th Stokes light Rs6The plane of composition and coordinate surface X-Y plane are not parallel, and two plane intersection lines are too
The wave vector direction of Hertz wave 3；From MgO:LiNbO3The 6th pump light L that crystal 2 is emittedp6By the 6th reflecting mirror Lm6It is anti-with the 7th
Penetrate mirror Lm7Become the 7th pump light L after reflectionp7, and incidence MgO:LiNbO again3Crystal 2；
7th pump light Lp7Incident MgO:LiNbO3Crystal 2 generates the 7th Stokes light L through optical parameter effects7And Terahertz
Wave 3, the 7th pump light Lp7In MgO:LiNbO3Become the 16th pump light R after being totally reflected in crystal 2p7, the 16th pumping
Light Rp7In MgO:LiNbO3The 16th Stokes light R is generated through optical parameter effect in crystal 2s7；The 7th Stokes light generated
Ls7With the 16th Stokes light Rs7By the 25th reflecting mirror LM7With the 34th reflecting mirror RM7Resonance in the resonant cavity of composition
Amplification, the THz wave 3 of generation is perpendicular to MgO:LiNbO3The surface of crystal 2 is emitted；7th pump light Lp7With the 7th Stokes
Light Ls7, the 16th Stokes light Rs7The plane of composition and coordinate surface X-Y plane are not parallel, and two plane intersection lines are THz wave 3
Wave vector direction；From MgO:LiNbO3The 16th pump light R that crystal 2 is emittedp7By the 16th reflecting mirror Rm7It is anti-with the 17th
Penetrate mirror Rm8Become the 17th pump light R after reflectionp8, and incidence MgO:LiNbO again3Crystal 2；
17th pump light Rp8Incident MgO:LiNbO3Crystal 2 generates the 17th Stokes light R through optical parameter effects8Too
The 3, the 17th pump light R of Hertz wavep8In MgO:LiNbO3Become the 8th pump light L after being totally reflected in crystal 2p8, the 8th pump
Pu light Lp8In MgO:LiNbO3The 8th Stokes light L is generated through optical parameter effect in crystal 2s8；The 8th Stokes light generated
Ls8With the 17th Stokes light Rs8By the 26th reflecting mirror LM8With the 35th reflecting mirror RM8Resonance in the resonant cavity of composition
Amplification, the THz wave 3 of generation is perpendicular to MgO:LiNbO3The surface of crystal 2 is emitted；17th pump light Rp8With the 8th
Stokes light Ls8, the 17th Stokes light Rs8The plane of composition and coordinate surface X-Y plane are not parallel, and two plane intersection lines are too
The wave vector direction of Hertz wave 3；From MgO:LiNbO3The 8th pump light L that crystal 2 is emittedp8By the 8th reflecting mirror Lm8It is anti-with the 9th
Penetrate mirror Lm9Become the 9th pump light L after reflectionp9, and incidence MgO:LiNbO again3Crystal 2；
9th pump light Lp9Incident MgO:LiNbO3Crystal 2 generates the 9th Stokes light L through optical parameter effects9And Terahertz
Wave 3, the 9th pump light Lp9In MgO:LiNbO3Become the 18th pump light R after being totally reflected in crystal 2p9, the 18th pumping
Light Rp9In MgO:LiNbO3The 18th Stokes light R is generated through optical parameter effect in crystal 2s9；The 9th Stokes light generated
Ls9With the 18th Stokes light Rs9By the 27th reflecting mirror LM9With the 36th reflecting mirror RM9Resonance in the resonant cavity of composition
Amplification, the THz wave 3 of generation is perpendicular to MgO:LiNbO3The surface of crystal 2 is emitted；9th pump light Lp9With the 9th Stokes
Light Ls9, the 18th Stokes light Rs9The plane of composition and coordinate surface X-Y plane are not parallel, and two plane intersection lines are THz wave 3
Wave vector direction；From MgO:LiNbO3The 18th pump light R that crystal 2 is emittedp9Mirror R is penetrated through eighteen incompatibilitiesm9Enter pump after reflection
Pu light recover 4；
First pump light Lp1With the tenth pump light Rp1The plane of propagation is plane determined by X-axis and Y-axis, and Z axis is perpendicular to first
Pump light Lp1With the tenth pump light Rp1The plane of propagation, the direction of propagation for the pump light being emitted from pumping source 1 are X-axis negative sense, too
The direction of propagation of Hertz wave 3 is that Y-axis is positive.
Pumping source 1 be pulse laser, wavelength 1064nm, repetition rate 10Hz, single pulse energy 200mJ,
Pump light Lp1Polarization direction be Z axis.
First reflecting mirror Lm1, the second reflecting mirror Lm2, third reflecting mirror Lm3, the 4th reflecting mirror Lm4, the 5th reflecting mirror Lm5,
Six reflecting mirror Lm6, the 7th reflecting mirror Lm7, the 8th reflecting mirror Lm8, the 9th reflecting mirror Lm9, the tenth reflecting mirror Rm1, the 11st reflecting mirror
Rm2, the tenth two-mirror Rm3, the 13rd reflecting mirror Rm4, the 14th reflecting mirror Rm5, the 15th reflecting mirror Rm6, the 16th reflecting mirror
Rm7, the 17th reflecting mirror Rm8, eighteen incompatibilities penetrate mirror Rm9, the 19th reflecting mirror LM1, the 20th reflecting mirror LM2, the 21st reflection
Mirror LM3, the 20th two-mirror LM4, the 23rd reflecting mirror LM5, the 24th reflecting mirror LM6, the 25th reflecting mirror LM7,
26 reflecting mirror LM8, the 27th reflecting mirror LM9, the second eighteen incompatibilities penetrate mirror RM1, the 29th reflecting mirror RM2, the 30th reflection
Mirror RM3, the 31st reflecting mirror RM4, the 30th two-mirror RM5, the 33rd reflecting mirror RM6, the 34th reflecting mirror RM7,
35 reflecting mirror RM8, the 36th reflecting mirror RM9It is plane mirror, and adjustable angle.
First reflecting mirror Lm1, the second reflecting mirror Lm2, third reflecting mirror Lm3, the 4th reflecting mirror Lm4, the 5th reflecting mirror Lm5,
Six reflecting mirror Lm6, the 7th reflecting mirror Lm7, the 8th reflecting mirror Lm8, the 9th reflecting mirror Lm9, the tenth reflecting mirror Rm1, the 11st reflecting mirror
Rm2, the tenth two-mirror Rm3, the 13rd reflecting mirror Rm4, the 14th reflecting mirror Rm5, the 15th reflecting mirror Rm6, the 16th reflecting mirror
Rm7, the 17th reflecting mirror Rm8, eighteen incompatibilities penetrate mirror Rm9The pumping light total reflection for being 1064nm to wavelength, the 19th reflecting mirror LM1、
20th reflecting mirror LM2, the 21st reflecting mirror LM3, the 20th two-mirror LM4, the 23rd reflecting mirror LM5, it is the 24th anti-
Penetrate mirror LM6, the 25th reflecting mirror LM7, the 26th reflecting mirror LM8, the 27th reflecting mirror LM9, the second eighteen incompatibilities penetrate mirror RM1、
29th reflecting mirror RM2, the 30th reflecting mirror RM3, the 31st reflecting mirror RM4, the 30th two-mirror RM5, it is the 33rd anti-
Penetrate mirror RM6, the 34th reflecting mirror RM7, the 35th reflecting mirror RM8, the 36th reflecting mirror RM9To wave-length coverage in 1064-
Stoke light total reflection in 1100nm.
Second pump light Lp2With the 2nd Stokes light Ls2, third pump light Lp3With the 3rd Stokes light Ls3, the 4th pump light
Lp4With the 4th Stokes light Ls4, the 5th pump light Lp5With the 5th Stokes light Ls5, the 6th pump light Lp6With the 6th Stokes light
Ls6, the 7th pump light Lp7With the 7th Stokes light Ls7, the 8th pump light Lp8With the 8th Stokes light Ls8, the 9th pump light Lp9With
9th Stokes light Ls9Projection on Z axis is in the positive axis of Z axis.
MgO:LiNbO3The optical axis of crystal 2 is isosceles trapezoid in X-Y plane, two interior angles of isosceles trapezoid are distinguished along Z axis
For 64.2 ° and 115.8 °, guarantee THz wave 3 perpendicular to MgO:LiNbO3The outgoing of 2 surface of crystal.
MgO:LiNbO3The waist edge length of crystal 2 is 20mm, and upper bottom edge length is 37.4mm, and bottom edge lengths are 20mm,
Along Z axis with a thickness of 50mm.
First pump light Lp1, the second pump light Lp2, third pump light Lp3, the 4th pump light Lp4, the 5th pump light Lp5,
Six pump light Lp6, the 7th pump light Lp7, the 8th pump light Lp8, the 9th pump light Lp9, the tenth pump light Rp1, the 11st pump light
Rp2, the 12nd pump light Rp3, the 13rd pump light Rp4, the 14th pump light Rp5, the 15th pump light Rp6, the 16th pump light
Rp7, the 17th pump light Rp8, the 18th pump light Rp9, the first Stokes light Ls1, the 2nd Stokes light Ls2, the 3rd Stokes light
Ls3, the 4th Stokes light Ls4, the 5th Stokes light Ls5, the 6th Stokes light Ls6, the 7th Stokes light Ls7, the 8th Stokes light
Ls8, the 9th Stokes light Ls9, the tenth Stokes light Rs1, the 11st Stokes light Rs2, the 12nd Stokes light Rs3, the 13rd
Stokes light Rs4, the 14th Stokes light Rs5, the 15th Stokes light Rs6, the 16th Stokes light Rs7, the 17th Stokes light
Rs8, the 18th Stokes light Rs9In MgO:LiNbO3Total reflection point in crystal 2 is same point, as THz wave 3 go out
Exit point.
First pump light Lp1, the first Stokes light Ls1With the tenth Stokes light Rs1The plane and coordinate surface X-Y plane of composition
Between angle be α1, the second pump light Lp2, the 2nd Stokes light Ls2With the 11st Stokes light Rs2The plane and coordinate of composition
Angle between the X-Y plane of face is α2, third pump light Lp3, the 3rd Stokes light Ls3With the 12nd Stokes light Rs3Composition
Angle between plane and coordinate surface X-Y plane is α3, the 4th pump light Lp4, the 4th Stokes light Ls4With the 13rd Stokes light
Rs4Angle between the plane and coordinate surface X-Y plane of composition is α4, the 5th pump light Lp5, the 5th Stokes light Ls5With the tenth
Four Stokes light Rs5Angle between the plane and coordinate surface X-Y plane of composition is α5, the 6th pump light Lp6, the 6th Stokes light
Ls6With the 15th Stokes light Rs6Angle between the plane and coordinate surface X-Y plane of composition is α6, the 7th pump light Lp7,
Seven Stokes light Ls7With the 16th Stokes light Rs7Angle between the plane and coordinate surface X-Y plane of composition is α7, the 8th pump
Pu light Lp8, the 8th Stokes light Ls8With the 17th Stokes light Rs8Angle between the plane and coordinate surface X-Y plane of composition is
α8, the 9th pump light Lp9, the 9th Stokes light Ls9With the 18th Stokes light Rs9The plane of composition and coordinate surface X-Y plane it
Between angle be α9, α1Equal to 0 °, α1、α2、α3、α4、α5、α6、α7、α8、α9It is sequentially increased, α9Less than 20 °.α1、α2、α3、α4、α5、
α6、α7、α8、α9It is sequentially increased 2 °.
First pump light Lp1With the first Stokes light Ls1Between angle be θ1, the second pump light Lp2With the 2nd Stokes
Light Ls2Between angle be θ2, third pump light Lp3With the 3rd Stokes light Ls3Between angle be θ3, the 4th pump light Lp4With
4th Stokes light Ls4Between angle be θ4, the 5th pump light Lp5With the 5th Stokes light Ls5Between angle be θ5, the 6th
Pump light Lp6With the 6th Stokes light Ls6Between angle be θ6, the 7th pump light Lp7With the 7th Stokes light Ls7Between folder
Angle is θ7, the 8th pump light Lp8With the 8th Stokes light Ls8Between angle be θ8, the 9th pump light Lp9With the 9th Stokes light
Ls9Between angle be θ9, θ1、θ2、θ3、θ4、θ5、θ6、θ7、θ8、θ9It is equal.By changing the first reflecting mirror Lm1, second reflection
Mirror Lm2, third reflecting mirror Lm3, the 4th reflecting mirror Lm4, the 5th reflecting mirror Lm5, the 6th reflecting mirror Lm6, the 7th reflecting mirror Lm7, the 8th
Reflecting mirror Lm8, the 9th reflecting mirror Lm9, the tenth reflecting mirror Rm1, the 11st reflecting mirror Rm2, the tenth two-mirror Rm3, the 13rd reflection
Mirror Rm4, the 14th reflecting mirror Rm5, the 15th reflecting mirror Rm6, the 16th reflecting mirror Rm7, the 17th reflecting mirror Rm8, eighteen incompatibilities penetrate
Mirror Rm9, the 19th reflecting mirror LM1, the 20th reflecting mirror LM2, the 21st reflecting mirror LM3, the 20th two-mirror LM4, the 20th
Three reflecting mirror LM5, the 24th reflecting mirror LM6, the 25th reflecting mirror LM7, the 26th reflecting mirror LM8, the 27th reflecting mirror
LM9, the second eighteen incompatibilities penetrate mirror RM1, the 29th reflecting mirror RM2, the 30th reflecting mirror RM3, the 31st reflecting mirror RM4, the 30th
Two-mirror RM5, the 33rd reflecting mirror RM6, the 34th reflecting mirror RM7, the 35th reflecting mirror RM8, the 36th reflecting mirror
RM9Angle, thus it is possible to vary θ1、θ2、θ3、θ4、θ5、θ6、θ7、θ8And θ9, θ1、θ2、θ3、θ4、θ5、θ6、θ7、θ8And θ9It is equal to angle θ,
As shown in Figure 2.When the range at the angle θ is in 0.3356 ° of -1.4686 ° of variation, available frequency range 0.8-3.2THz too
Hertz wave 3, while available wave-length coverage is in the Stokes light of 1067-1076.2nm.
According to principle of conservation of energy ωP=ωS+ωTAnd phase matching relationshipIt can
To calculate the wavelength of Stokes light at different levels and the frequency of THz wave at different levels.Wherein, ωP、ωS、ωTRespectively pump light
Angular frequency, the angular frequency of Stokes light, THz wave angular frequency, angle of the θ between pump light and Stokes light, kP、kS、
kTThe respectively wave vector of pump light, Stokes light, THz wave in crystal,niRespectively pump
The refractive index of Pu light, Stokes light, THz wave in crystal, c are the light velocity in vacuum.
Second pump light Lp2With the 2nd Stokes light Ls2Intersection, third between the plane and coordinate surface X-Y plane of composition
Pump light Lp3With the 3rd Stokes light Ls3Intersection, the 4th pump light L between the plane and coordinate surface X-Y plane of compositionp4With
Four Stokes light Ls4Intersection, the 5th pump light L between the plane and coordinate surface X-Y plane of compositionp5With the 5th Stokes light Ls5
Intersection, the 6th pump light L between the plane and coordinate surface X-Y plane of compositionp6With the 6th Stokes light Ls6The plane of composition with
Intersection, the 7th pump light L between coordinate surface X-Y planep7With the 7th Stokes light Ls7The plane and coordinate surface X-Y of composition are flat
Intersection, the 8th pump light L between facep8With the 8th Stokes light Ls8Friendship between the plane and coordinate surface X-Y plane of composition
Line, the 9th pump light Lp9With the 9th Stokes light Ls9Intersection between the plane and coordinate surface X-Y plane of composition is Terahertz
The wave vector direction of wave 3.
Specific embodiment is presented above, but the present invention is not limited to described embodiment.Base of the invention
This thinking is above-mentioned basic scheme, and for those of ordinary skill in the art, various changes are designed in introduction according to the present invention
The model of shape, formula, parameter do not need to spend creative work.It is right without departing from the principles and spirit of the present invention
The change, modification, replacement and modification that embodiment carries out are still fallen in protection scope of the present invention.
Claims (10)
1. a kind of three-dimensional optical parametric oscillation terahertz radiation source, it is characterised in that: including pumping source (1), MgO:LiNbO3It is brilliant
Body (2), pump light recover (4), and be arranged in MgO:LiNbO3Reflecting mirror around crystal (2)；
The pump light being emitted from pumping source (1) is through the first reflecting mirror (Lm1) become the first pump light (L after reflectionp1) incidence MgO afterwards:
LiNbO3Crystal (2) generates the first Stokes light (L through optical parameter effects1) and THz wave (3), the first pump light (Lp1)
In MgO:LiNbO3Become the tenth pump light (R after being totally reflected in crystal (2)p1), the tenth pump light (Rp1) in MgO:
LiNbO3The tenth Stokes light (R is generated through optical parameter effect in crystal (2)s1)；The first Stokes light (L generateds1) and the
Ten Stokes light (Rs1) by the 19th reflecting mirror (LM1) and the second eighteen incompatibilities penetrate mirror (RM1) composition resonant cavity in resonance put
Greatly, the THz wave (3) of generation is perpendicular to MgO:LiNbO3The surface of crystal (2) is emitted；First pump light (Lp1) and first
Stokes light (Ls1), the tenth Stokes light (Rs1) composition plane be parallel to coordinate surface X-Y plane, from MgO:LiNbO3Crystal
(2) the tenth pump light (R being emittedp1) through the tenth reflecting mirror (Rm1) and the 11st reflecting mirror (Rm2) become the 11st pump after reflection
Pu light (Rp2), and incidence MgO:LiNbO again3Crystal (2)；
11st pump light (Rp2) incidence MgO:LiNbO3Crystal (2) generates the 11st Stokes light through optical parameter effect
(Rs2) and THz wave (3), the 11st pump light (Rp2) in MgO:LiNbO3Become the second pump after being totally reflected in crystal (2)
Pu light (Lp2), the second pump light (Lp2) in MgO:LiNbO3The 2nd Stokes light is generated through optical parameter effect in crystal (2)
(Ls2)；The 2nd Stokes light (L generateds2) and the 11st Stokes light (Rs2) by the 20th reflecting mirror (LM2) and the 20th
Nine reflecting mirror (RM2) composition resonant cavity in resonance amplification, the THz wave (3) of generation is perpendicular to MgO:LiNbO3Crystal (2)
Surface outgoing, the 11st pump light (Rp2) and the 2nd Stokes light (Ls2), the 11st Stokes light (Rs2) composition plane and seat
Mark face X-Y plane is not parallel, and two plane intersection lines are the wave vector direction of THz wave (3)；From MgO:LiNbO3Crystal (2) outgoing
The second pump light (Lp2) through the second reflecting mirror (Lm2) and third reflecting mirror (Lm3) become third pump light (L after reflectionp3), and
Incidence MgO:LiNbO again3Crystal (2)；
Third pump light (Lp3) incidence MgO:LiNbO3Crystal (2) generates the 3rd Stokes light (L through optical parameter effects3) and
THz wave (3), third pump light (Lp3) in MgO:LiNbO3Become 12 pump lights after being totally reflected in crystal (2)
(Rp3), the 12nd pump light (Rp3) in MgO:LiNbO3The 12nd Stokes light is generated through optical parameter effect in crystal (2)
(Rs3), the 3rd Stokes light (L of generations3) and the 12nd Stokes light (Rs3) by the 21st reflecting mirror (LM3) and third
Ten reflecting mirror (RM3) composition resonant cavity in resonance amplification, the THz wave (3) of generation is perpendicular to MgO:LiNbO3Crystal (2)
Surface outgoing；Third pump light (Lp3) and the 3rd Stokes light (Ls3), the 12nd Stokes light (Rs3) composition plane and coordinate
Face X-Y plane is not parallel, and two plane intersection lines are the wave vector direction of THz wave (3)；From MgO:LiNbO3Crystal (2) outgoing
12nd pump light (Rp3) by the tenth two-mirror (Rm3) and the 13rd reflecting mirror (Rm4) become the 13rd pump light after reflection
(Rp4), and incidence MgO:LiNbO again3Crystal (2)；
13rd pump light (Rp4) incidence MgO:LiNbO3Crystal (2) generates the 13rd Stokes light through optical parameter effect
(Rs4) and THz wave (3), the 13rd pump light (Rp4) in MgO:LiNbO3Become the 4th pump after being totally reflected in crystal (2)
Pu light (Lp4), the 4th pump light (Lp4) in MgO:LiNbO3The 4th Stokes light is generated through optical parameter effect in crystal (2)
(Ls4)；The 4th Stokes light (L generateds4) and the 13rd Stokes light (Rs4) by the 20th two-mirror (LM4) and third
11 reflecting mirror (RM4) composition resonant cavity in resonance amplification, the THz wave (3) of generation is perpendicular to MgO:LiNbO3Crystal (2)
Surface outgoing；13rd pump light (Rp4) and the 4th Stokes light (Ls4), the 13rd Stokes light (Rs4) composition plane with
Coordinate surface X-Y plane is not parallel, and two plane intersection lines are the wave vector direction of THz wave (3)；From MgO:LiNbO3Crystal (2) goes out
The 4th pump light (L penetratedp4) by the 4th reflecting mirror (Lm4) and the 5th reflecting mirror (Lm5) become the 5th pump light after reflection
(Lp5), and incidence MgO:LiNbO again3Crystal (2)；
5th pump light (Lp5) incidence MgO:LiNbO3Crystal (2) generates the 5th Stokes light (L through optical parameter effects5) and
THz wave (3), the 5th pump light (Lp5) in MgO:LiNbO3Become the 14th pump light after being totally reflected in crystal (2)
(Rp5), the 14th pump light (Rp5) in MgO:LiNbO3The 14th Stokes light is generated through optical parameter effect in crystal (2)
(Rs5)；The 5th Stokes light (L generateds5) and the 14th Stokes light (Rs5) by the 23rd reflecting mirror (LM5) and third
Ten two-mirror (RM5) composition resonant cavity in resonance amplification, the THz wave (3) of generation is perpendicular to MgO:LiNbO3Crystal (2)
Surface outgoing；5th pump light (Lp5) and the 5th Stokes light (Ls5), the 14th Stokes light (Rs5) composition plane and seat
Mark face X-Y plane is not parallel, and two plane intersection lines are the wave vector direction of THz wave (3)；From MgO:LiNbO3Crystal (2) outgoing
The 14th pump light (Rp5) by the 14th reflecting mirror (Rm5) and the 15th reflecting mirror (Rm6) become the 15th pumping after reflection
Light (Rp6), and incidence MgO:LiNbO again3Crystal (2)；
15th pump light (Rp6) incidence MgO:LiNbO3Crystal (2) generates the 15th Stokes light through optical parameter effect
(Rs6) and THz wave (3), the 15th pump light (Rp6) in MgO:LiNbO3Become the 6th pump after being totally reflected in crystal (2)
Pu light (Lp6), the 6th pump light (Lp6) in MgO:LiNbO3The 6th Stokes light is generated through optical parameter effect in crystal (2)
(Ls6)；The 6th Stokes light (L generateds6) and the 15th Stokes light (Rs6) by the 24th reflecting mirror (LM6) and third
13 reflecting mirror (RM6) composition resonant cavity in resonance amplification, the THz wave (3) of generation is perpendicular to MgO:LiNbO3Crystal (2)
Surface outgoing；15th pump light (Rp6) and the 6th Stokes light (Ls6), the 15th Stokes light (Rs6) composition plane with
Coordinate surface X-Y plane is not parallel, and two plane intersection lines are the wave vector direction of THz wave (3)；From MgO:LiNbO3Crystal (2) goes out
The 6th pump light (L penetratedp6) by the 6th reflecting mirror (Lm6) and the 7th reflecting mirror (Lm7) become the 7th pump light after reflection
(Lp7), and incidence MgO:LiNbO again3Crystal (2)；
7th pump light (Lp7) incidence MgO:LiNbO3Crystal (2) generates the 7th Stokes light (L through optical parameter effects7) and
THz wave (3), the 7th pump light (Lp7) in MgO:LiNbO3Become the 16th pump light after being totally reflected in crystal (2)
(Rp7), the 16th pump light (Rp7) in MgO:LiNbO3The 16th Stokes light is generated through optical parameter effect in crystal (2)
(Rs7)；The 7th Stokes light (L generateds7) and the 16th Stokes light (Rs7) by the 25th reflecting mirror (LM7) and third
14 reflecting mirror (RM7) composition resonant cavity in resonance amplification, the THz wave (3) of generation is perpendicular to MgO:LiNbO3Crystal (2)
Surface outgoing；7th pump light (Lp7) and the 7th Stokes light (Ls7), the 16th Stokes light (Rs7) composition plane and seat
Mark face X-Y plane is not parallel, and two plane intersection lines are the wave vector direction of THz wave (3)；From MgO:LiNbO3Crystal (2) outgoing
The 16th pump light (Rp7) by the 16th reflecting mirror (Rm7) and the 17th reflecting mirror (Rm8) become the 17th pumping after reflection
Light (Rp8), and incidence MgO:LiNbO again3Crystal (2)；
17th pump light (Rp8) incidence MgO:LiNbO3Crystal (2) generates the 17th Stokes light through optical parameter effect
(Rs8) and THz wave (3), the 17th pump light (Rp8) in MgO:LiNbO3Become the 8th pump after being totally reflected in crystal (2)
Pu light (Lp8), the 8th pump light (Lp8) in MgO:LiNbO3The 8th Stokes light is generated through optical parameter effect in crystal (2)
(Ls8)；The 8th Stokes light (L generateds8) and the 17th Stokes light (Rs8) by the 26th reflecting mirror (LM8) and third
15 reflecting mirror (RM8) composition resonant cavity in resonance amplification, the THz wave (3) of generation is perpendicular to MgO:LiNbO3Crystal (2)
Surface outgoing；17th pump light (Rp8) and the 8th Stokes light (Ls8), the 17th Stokes light (Rs8) composition plane with
Coordinate surface X-Y plane is not parallel, and two plane intersection lines are the wave vector direction of THz wave (3)；From MgO:LiNbO3Crystal (2) goes out
The 8th pump light (L penetratedp8) by the 8th reflecting mirror (Lm8) and the 9th reflecting mirror (Lm9) become the 9th pump light after reflection
(Lp9), and incidence MgO:LiNbO again3Crystal (2)；
9th pump light (Lp9) incidence MgO:LiNbO3Crystal (2) generates the 9th Stokes light (L through optical parameter effects9) and
THz wave (3), the 9th pump light (Lp9) in MgO:LiNbO3Become the 18th pump light after being totally reflected in crystal (2)
(Rp9), the 18th pump light (Rp9) in MgO:LiNbO3The 18th Stokes light is generated through optical parameter effect in crystal (2)
(Rs9)；The 9th Stokes light (L generateds9) and the 18th Stokes light (Rs9) by the 27th reflecting mirror (LM9) and third
16 reflecting mirror (RM9) composition resonant cavity in resonance amplification, the THz wave (3) of generation is perpendicular to MgO:LiNbO3Crystal (2)
Surface outgoing；9th pump light (Lp9) and the 9th Stokes light (Ls9), the 18th Stokes light (Rs9) composition plane and seat
Mark face X-Y plane is not parallel, and two plane intersection lines are the wave vector direction of THz wave (3)；From MgO:LiNbO3Crystal (2) outgoing
The 18th pump light (Rp9) through eighteen incompatibilities penetrate mirror (Rm9) enter pump light recover (4) after reflection；
First pump light (Lp1) and the tenth pump light (Rp1) plane propagated is plane determined by X-axis and Y-axis, Z axis perpendicular to
First pump light (Lp1) and the tenth pump light (Rp1) plane propagated, the direction of propagation of pump light being emitted from pumping source (1) is
X-axis negative sense, the direction of propagation of THz wave (3) are that Y-axis is positive.
2. three-dimensional optical parametric oscillation terahertz radiation source according to claim 1, it is characterised in that: the pumping source
It (1) is pulse laser, wavelength 1064nm, repetition rate 10Hz, single pulse energy 200mJ, pump light (Lp1) it is inclined
Vibration direction is Z axis.
3. three-dimensional optical parametric oscillation terahertz radiation source according to claim 1, it is characterised in that: described first is anti-
Penetrate mirror Lm1, the second reflecting mirror Lm2, third reflecting mirror Lm3, the 4th reflecting mirror Lm4, the 5th reflecting mirror Lm5, the 6th reflecting mirror Lm6,
Seven reflecting mirror Lm7, the 8th reflecting mirror Lm8, the 9th reflecting mirror Lm9, the tenth reflecting mirror Rm1, the 11st reflecting mirror Rm2, the 12nd reflection
Mirror Rm3, the 13rd reflecting mirror Rm4, the 14th reflecting mirror Rm5, the 15th reflecting mirror Rm6, the 16th reflecting mirror Rm7, the 17th reflection
Mirror Rm8, eighteen incompatibilities penetrate mirror Rm9, the 19th reflecting mirror LM1, the 20th reflecting mirror LM2, the 21st reflecting mirror LM3, the 22nd
Reflecting mirror LM4, the 23rd reflecting mirror LM5, the 24th reflecting mirror LM6, the 25th reflecting mirror LM7, the 26th reflecting mirror
LM8, the 27th reflecting mirror LM9, the second eighteen incompatibilities penetrate mirror RM1, the 29th reflecting mirror RM2, the 30th reflecting mirror RM3, the 30th
One reflecting mirror RM4, the 30th two-mirror RM5, the 33rd reflecting mirror RM6, the 34th reflecting mirror RM7, the 35th reflecting mirror
RM8, the 36th reflecting mirror (RM9) it is plane mirror, and adjustable angle.
4. three-dimensional optical parametric oscillation terahertz radiation source according to claim 3, it is characterised in that: described first is anti-
Penetrate mirror (Lm1), the second reflecting mirror (Lm2), third reflecting mirror (Lm3), the 4th reflecting mirror (Lm4), the 5th reflecting mirror (Lm5), it is the 6th anti-
Penetrate mirror (Lm6), the 7th reflecting mirror (Lm7), the 8th reflecting mirror (Lm8), the 9th reflecting mirror (Lm9), the tenth reflecting mirror (Rm1), the 11st
Reflecting mirror (Rm2), the tenth two-mirror (Rm3), the 13rd reflecting mirror (Rm4), the 14th reflecting mirror (Rm5), the 15th reflecting mirror
(Rm6), the 16th reflecting mirror (Rm7), the 17th reflecting mirror (Rm8), eighteen incompatibilities penetrate mirror (Rm9) it is the pumping of 1064nm to wavelength
Light total reflection, the 19th reflecting mirror (LM1), the 20th reflecting mirror (LM2), the 21st reflecting mirror (LM3), the 20th two-mirror
(LM4), the 23rd reflecting mirror (LM5), the 24th reflecting mirror (LM6), the 25th reflecting mirror (LM7), the 26th reflecting mirror
(LM8), the 27th reflecting mirror (LM9), the second eighteen incompatibilities penetrate mirror (RM1), the 29th reflecting mirror (RM2), the 30th reflecting mirror
(RM3), the 31st reflecting mirror (RM4), the 30th two-mirror (RM5), the 33rd reflecting mirror (RM6), the 34th reflecting mirror
(RM7), the 35th reflecting mirror (RM8), the 36th reflecting mirror (RM9) Stoke light to wave-length coverage in 1064-1100nm
Total reflection.
5. three-dimensional optical parametric oscillation terahertz radiation source according to claim 1, it is characterised in that: second pump
Pu light (Lp2) and the 2nd Stokes light (Ls2), third pump light (Lp3) and the 3rd Stokes light (Ls3), the 4th pump light (Lp4)
With the 4th Stokes light (Ls4), the 5th pump light (Lp5) and the 5th Stokes light (Ls5), the 6th pump light (Lp6) and the 6th
Stokes light (Ls6), the 7th pump light (Lp7) and the 7th Stokes light (Ls7), the 8th pump light (Lp8) and the 8th Stokes light
(Ls8), the 9th pump light (Lp9) and the 9th Stokes light (Ls9) projecting in the positive axis of Z axis on Z axis.
6. three-dimensional optical parametric oscillation terahertz radiation source according to claim 1, it is characterised in that: the MgO:
LiNbO3The optical axis of crystal (2) is isosceles trapezoid in X-Y plane along Z axis, two interior angles of isosceles trapezoid be respectively 64.2 ° and
115.8 °, guarantee THz wave (3) perpendicular to MgO:LiNbO3The outgoing of crystal (2) surface.
7. three-dimensional optical parametric oscillation terahertz radiation source according to claim 6, it is characterised in that: the MgO:
LiNbO3The waist edge length of crystal (2) is 20mm, and upper bottom edge length is 37.4mm, and bottom edge lengths are 20mm, along the thickness of Z axis
For 50mm.
8. three-dimensional optical parametric oscillation terahertz radiation source according to claim 1, it is characterised in that: first pump
Pu light (Lp1), the second pump light (Lp2), third pump light (Lp3), the 4th pump light (Lp4), the 5th pump light (Lp5), the 6th pump
Pu light (Lp6), the 7th pump light (Lp7), the 8th pump light (Lp8), the 9th pump light (Lp9), the tenth pump light (Rp1), the 11st
Pump light (Rp2), the 12nd pump light (Rp3), the 13rd pump light (Rp4), the 14th pump light (Rp5), the 15th pump light
(Rp6), the 16th pump light (Rp7), the 17th pump light (Rp8), the 18th pump light (Rp9), the first Stokes light (Ls1),
Two Stokes light (Ls2), the 3rd Stokes light (Ls3), the 4th Stokes light (Ls4), the 5th Stokes light (Ls5), the 6th Stokes
Light (Ls6), the 7th Stokes light (Ls7), the 8th Stokes light (Ls8), the 9th Stokes light (Ls9), the tenth Stokes light (Rs1)、
11st Stokes light (Rs2), the 12nd Stokes light (Rs3), the 13rd Stokes light (Rs4), the 14th Stokes light (Rs5)、
15th Stokes light (Rs6), the 16th Stokes light (Rs7), the 17th Stokes light (Rs8), the 18th Stokes light (Rs9)
In MgO:LiNbO3Total reflection point in crystal (2) is same point, as the eye point of THz wave (3).
9. three-dimensional optical parametric oscillation terahertz radiation source according to claim 1, it is characterised in that: first pump
Pu light (Lp1), the first Stokes light (Ls1) and the tenth Stokes light (Rs1) composition plane and coordinate surface X-Y plane between folder
Angle is α1, the second pump light (Lp2), the 2nd Stokes light (Ls2) and the 11st Stokes light (Rs2) composition plane and coordinate surface
Angle between X-Y plane is α2, third pump light (Lp3), the 3rd Stokes light (Ls3) and the 12nd Stokes light (Rs3) group
At plane and coordinate surface X-Y plane between angle be α3, the 4th pump light (Lp4), the 4th Stokes light (Ls4) and the 13rd
Stokes light (Rs4) composition plane and coordinate surface X-Y plane between angle be α4, the 5th pump light (Lp5), the 5th Stokes
Light (Ls5) and the 14th Stokes light (Rs5) composition plane and coordinate surface X-Y plane between angle be α5, the 6th pump light
(Lp6), the 6th Stokes light (Ls6) and the 15th Stokes light (Rs6) composition plane and coordinate surface X-Y plane between angle
For α6, the 7th pump light (Lp7), the 7th Stokes light (Ls7) and the 16th Stokes light (Rs7) composition plane and coordinate surface X-
Angle between Y plane is α7, the 8th pump light (Lp8), the 8th Stokes light (Ls8) and the 17th Stokes light (Rs8) composition
Plane and coordinate surface X-Y plane between angle be α8, the 9th pump light (Lp9), the 9th Stokes light (Ls9) and the 18th
Stokes light (Rs9) composition plane and coordinate surface X-Y plane between angle be α9, α1Equal to 0 °, α1、α2、α3、α4、α5、α6、
α7、α8、α9It is sequentially increased, α9Less than 20 °.
10. three-dimensional optical parametric oscillation terahertz radiation source according to claim 1, it is characterised in that: described first
Pump light (Lp1) and the first Stokes light (Ls1) between angle be θ1, the second pump light (Lp2) and the 2nd Stokes light (Ls2)
Between angle be θ2, third pump light (Lp3) and the 3rd Stokes light (Ls3) between angle be θ3, the 4th pump light (Lp4)
With the 4th Stokes light (Ls4) between angle be θ4, the 5th pump light (Lp5) and the 5th Stokes light (Ls5) between angle
For θ5, the 6th pump light (Lp6) and the 6th Stokes light (Ls6) between angle be θ6, the 7th pump light (Lp7) and the 7th
Stokes light (Ls7) between angle be θ7, the 8th pump light (Lp8) and the 8th Stokes light (Ls8) between angle be θ8, the
Nine pump light (Lp9) and the 9th Stokes light (Ls9) between angle be θ9, θ1、θ2、θ3、θ4、θ5、θ6、θ7、θ8、θ9It is equal.
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| CN112670797A (en) * | 2020-12-29 | 2021-04-16 | 华北水利水电大学 | Multi-frequency terahertz radiation source based on optical parametric oscillation |
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