CN107860741A - The integrating device and method of thermoelectron frequency mixer and Terahertz quantum cascaded laser - Google Patents
The integrating device and method of thermoelectron frequency mixer and Terahertz quantum cascaded laser Download PDFInfo
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- CN107860741A CN107860741A CN201710846796.6A CN201710846796A CN107860741A CN 107860741 A CN107860741 A CN 107860741A CN 201710846796 A CN201710846796 A CN 201710846796A CN 107860741 A CN107860741 A CN 107860741A
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- Prior art keywords
- frequency mixer
- heat superconducting
- spectroscope
- cascaded laser
- quantum cascaded
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000000034 method Methods 0.000 title claims abstract description 8
- 238000005057 refrigeration Methods 0.000 claims abstract description 14
- 238000005086 pumping Methods 0.000 claims abstract description 7
- 230000008878 coupling Effects 0.000 claims abstract description 4
- 238000010168 coupling process Methods 0.000 claims abstract description 4
- 238000005859 coupling reaction Methods 0.000 claims abstract description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 12
- 229910052710 silicon Inorganic materials 0.000 claims description 12
- 239000010703 silicon Substances 0.000 claims description 12
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 9
- 230000003447 ipsilateral effect Effects 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims 1
- 230000009897 systematic effect Effects 0.000 abstract description 5
- 238000009434 installation Methods 0.000 abstract description 4
- 230000005540 biological transmission Effects 0.000 abstract description 3
- 239000010408 film Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005036 potential barrier Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3581—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light using far infrared light; using Terahertz radiation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
Abstract
A kind of integrating device and method of thermoelectron frequency mixer and Terahertz quantum cascaded laser, allow Terahertz quantum cascaded laser in the structure inside-pumping heat superconducting electronics frequency mixer of very little using parabolic mirror and spectroscope, using low-power consumption Terahertz quantum cascaded laser, installation parabolic mirror, installation spectroscope and installation heat superconducting electronics frequency mixer.Terahertz quantum cascaded laser and heat superconducting electronics frequency mixer are integrated in same cavity by the present invention, avoid and place QCL respectively with needing influence of the steam for terahertz signal in adjustment light path and air during heat superconducting electronics frequency mixer using double Dewars, the transmission loss of terahertz signal can be substantially reduced, improve coupling efficiency, so as to reduce receiver noise temperature, improve systematic function, and reduce system bulk, reduce the requirement to the refrigeration work consumption of Cryo Refrigerator, make it possible the follow-up experimental system that further simplifies with improving systematic function.
Description
Technical field
The invention belongs to Terahertz superconduction detection technology field, and in particular to a kind of thermoelectron frequency mixer and Terahertz quantum
The integrating device and method of cascaded laser.
Background technology
The terahertz detector of based superconductive device is by its excellent detection performance in the astronomy of terahertz wave band
Considerable position is occupied in observation.Heat superconducting electronics frequency mixer is due to relatively low noise temperature and with ultra-wide
Working frequency, it has also become terahertz wave band high band coherence detector is preferred.Many Terahertz telescopes all filled in the last few years
Heat superconducting electronics frequency mixer receiver system is matched somebody with somebody, such as U.S.'s SMTO/HHT telescopes, Chilean APEX telescopes, European Space Agency
Herschel space telescopes, virtue cooperation SOFIA flying telescopes etc..
Heat superconducting electronics frequency mixer is deposited on dielectric material by one layer（Si, MgO etc.）On superconducting thin film（Nb, NbN and
NbTiN etc.）Composition, both ends are connected to antenna by metal contact pads.The extremely low sheet of heat superconducting electronics frequency mixer demand
Shake power（~100nW）, it is mixed using the non-linear realization extremely strong near superconducting transition temperature of heat superconducting electronics frequency mixer.Amount
Qc laser be based on electronics in semiconductor quantum well conduction band intersubband transitions and phonon secondary resonance tunnelling principle
Novel unipolar alternate semiconductor devices.Different from the compound stimulated radiation mechanism of electron-hole of traditional p-n junction type semiconductor laser,
QCL stimulated radiation process only has electronics participation, and the selection of excitation wavelength can pass through the potential well and potential barrier of active area
Can band cut realize.The features such as Terahertz quantum cascaded laser is due to itself unipolarity and cascade, can basis
Need to make Terahertz frequency range signal generator, and its transmission power（~mW）Fully meet as heat superconducting electronics frequency mixer sheet
The needs of vibration source.In actual applications, due to being limited by Cryo Refrigerator refrigeration work consumption, typically require that heat superconducting electronics mixes
Frequency device must freeze respectively from QCL in different Dewars recycles spectroscope to make Terahertz quantum cascaded laser
Device pumping heat superconducting electronics frequency mixer.Because the light path between two Dewars can be inhaled by steam to terahertz signal in atmosphere
Receiving influences, and causes pumping to the terahertz signal of heat superconducting electronics frequency mixer greatly to weaken.Another way is by super-conductive electrothermal
Sub- frequency mixer is integrated in same refrigeration platform with QCL, and problem be present is that system bulk is excessively huge, structure mistake
In complexity, disturbing factor is also more, while needs the high refrigeration work consumption of Cryo Refrigerator.
The content of the invention
The present invention's is directed to deficiency of the prior art, there is provided a kind of thermoelectron frequency mixer and Terahertz quantum cascaded laser
The integrating device and method of device.
To achieve the above object, the present invention uses following technical scheme：
A kind of integrating device of thermoelectron frequency mixer and Terahertz quantum cascaded laser, it is characterised in that including：Cavity, too
Hertz QCL, heat superconducting electronics frequency mixer, parabolic mirror and spectroscope；The cavity is fixed on Dewar system
On cold platform, the Terahertz quantum cascaded laser, heat superconducting electronics frequency mixer, parabolic mirror and spectroscope are integrated
In same cavity.
To optimize above-mentioned technical proposal, the concrete measure taken also includes：
The cavity includes pedestal and housing, and the fixing screwed hole being adapted with Dewar refrigeration platform is offered on the pedestal,
The trapezoidal body structure of housing, to be in 45 ° of inclined-plane with pedestal, spectroscope is embedded to be arranged in inclined-plane the one side of housing,
Parabolic mirror is arranged on the bottom surface of housing, and spectroscope and parabolic mirror are in 45° angle, Terahertz quantum cascaded laser
Device is installed on side relative with inclined-plane in the housing so that the signal transmitting terminal and parabola of Terahertz quantum cascaded laser
Speculum is relative, and heat superconducting electronics frequency mixer is arranged on the ipsilateral of Terahertz quantum cascaded laser, and heat superconducting electronics mixes
The signal receiving end of frequency device is relative with spectroscope.
The spectroscope uses spectroscope film, and spectroscope film window is against dewar window.
The top surface of the housing is provided with medium frequency output end mouth, and the side of housing is provided with heat superconducting electronics frequency mixer and quantum stage
Join laser control input.
In addition, it is also proposed that a kind of using the integrated of above-mentioned heat superconducting electronics frequency mixer and Terahertz quantum cascaded laser
The method of work of device, it is characterised in that including：
Terahertz quantum cascaded laser, parabolic mirror are sequentially arranged to the respective design position of cavity, by spectroscope
Tighten and be fixed on design attitude, heat superconducting electronics frequency mixer is fixed on silicon lens center, and the super-conductive electrothermal that will be fixed
Sub- frequency mixer is fixed on design attitude with silicon lens；
Integrated cavity is fixed on the 4K refrigeration platforms of Dewar, spectroscope window will be taken out true against dewar window in Dewar
Empty and refrigeration to temperature reaches 4K；
Launch terahertz signal from Terahertz quantum cascaded laser, by the reflection of parabolic mirror, signal incides
With parabolic mirror on the spectroscope of 45° angle, signal passes through spectroscopical reflection again, incides heat superconducting electronics frequency mixer
On the silicon lens of front end, after the focusing of silicon lens, terahertz signal pumping that Terahertz quantum cascaded laser is sent
Into heat superconducting electronics frequency mixer.
The beneficial effects of the invention are as follows：
1st, substantially reduced using low-power consumption Terahertz quantum cascaded laser, heating power, under the conditions of same refrigeration work consumption, Du
Watt interior temperature can be effectively controlled within heat superconducting electronics frequency mixer critical-temperature；
2nd, using highly integrated Terahertz quantum cascaded laser and heat superconducting electronics frequency mixer, experimental system is simplified, together
When avoid the influence that steam transmits to terahertz signal；
3rd, using highly integrated cavity（block）, avoid the influence brought because adjustment pump signal light path is inaccurate, drop
Low receiver noise temperature, for it is follow-up further simplify system and improve performance be possibly realized.
Brief description of the drawings
Fig. 1 is the overall structure diagram of cavity of the present invention.
Fig. 2 is the operation principle schematic diagram of the present invention.
Fig. 3 is the noise temperature curve of the present invention.
Embodiment
In conjunction with the accompanying drawings, the present invention is further explained in detail.
Thermoelectron frequency mixer as shown in Figure 1 and the integrating device of Terahertz quantum cascaded laser, including：Cavity 1, too
Hertz QCL 2, heat superconducting electronics frequency mixer 3, parabolic mirror 4 and spectroscope 5.Cavity 1 is fixed on Dewar
Freeze on platform, Terahertz quantum cascaded laser 2, heat superconducting electronics frequency mixer 3, parabolic mirror 4 and spectroscope 5 collect
Into in same cavity 1.
Cavity 1 includes pedestal 6 and housing 7, and the fixing screwed hole 8 being adapted with Dewar refrigeration platform is offered on pedestal 6.
The trapezoidal body structure of housing 7, the one side of housing 7 is that spectroscope 5 is embedded to be arranged on inclined-plane 9 in 45 ° of inclined-plane 9 with pedestal 6
In, specific to use spectroscope film, parabolic mirror 4 is arranged on the bottom surface of housing 7, and spectroscope 5 is in parabolic mirror 4
45° angle.Terahertz quantum cascaded laser 2 is arranged on side relative with inclined-plane 9 in housing 7 so that Terahertz quantum level
The signal transmitting terminal of connection laser 2 is relative with parabolic mirror 4, and heat superconducting electronics frequency mixer 3 is arranged on Terahertz quantum level
On the ipsilateral for joining laser 2, the signal receiving end of heat superconducting electronics frequency mixer 3 is relative with spectroscope 5.The top surface of housing 7 is also
Provided with medium frequency output end mouth 10, the side of housing 7 is provided with heat superconducting electronics frequency mixer and QCL control signal
11。
The installation steps of integrating device are as follows：
1st, by Terahertz quantum cascaded laser 2（QCL）It is placed on respective design position；
The 2nd, parabolic mirror 4 is installed to relevant position；
3rd, spectroscope film 5 is tightened and is fixed on design attitude；
4th, heat superconducting electronics frequency mixer 3 is fixed on silicon lens center；
5th, the heat superconducting electronics frequency mixer 3 fixed and silicon lens are fixed on design attitude.
Systematic parameter is as follows：4 diameters of parabolic mirror=20mm, focal length=12mm, rating of set coupling efficiency are
0.945。
With further reference to Fig. 2, pump signal transmission step is as follows：
1st, terahertz signal is launched from Terahertz quantum cascaded laser 2；
2nd, by the reflection of parabolic mirror 4, signal incide with the spectroscope at its angle at 45 ° 5；
3rd, signal is again by the reflection of spectroscope 5, on the silicon lens for inciding the front end of heat superconducting electronics frequency mixer 3；
4th, after the focusing of silicon lens, terahertz signal pumping that Terahertz quantum cascaded laser 2 is sent to heat superconducting
In electronics frequency mixer 3.
In actual use, integrated cavity 1 is fixed on the 4K refrigeration platforms of Dewar, the window face of spectroscope film 5 Du
Watt window, reaches 4K by vacuumizing and freezing in Dewar to temperature.The computerized control fan blades of low temperature electric machine of profit makes its rotation,
Make its switching cold（4K）Heat（295K）Load, measure integrated system noise temperature.
The present invention utilizes paraboloidal mirror and the highly integrated low-power consumption Terahertz quantum cascaded laser of spectroscope and heat superconducting
Electronics frequency mixer, Terahertz quantum cascaded laser and heat superconducting electronics frequency mixer are integrated in same cavity（block）In,
Avoid and place QCL respectively with needing adjustment light path and sky during heat superconducting electronics frequency mixer using double Dewars
Steam influences the terahertz signal of pumping in gas, can substantially reduce the transmission loss of terahertz signal, improves coupling efficiency, so as to
Receiver noise temperature is reduced, improves systematic function.Mixed using low-power consumption Terahertz quantum cascaded laser and heat superconducting electronics
Integrating for frequency device, considerably reduces system bulk, reduces the requirement to the refrigeration work consumption of Cryo Refrigerator, subsequently to enter one
Step simplifies experimental system and is possibly realized with improving systematic function.
It should be noted that cited such as " on ", " under ", the term of "left", "right", "front", "rear" in invention, also
Only understanding for ease of narration, and be not used to limit the enforceable scope of the present invention, its relativeness is altered or modified, in nothing
Under essence change technology contents, when being also considered as the enforceable category of the present invention.
The above is only the preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-described embodiment,
All technical schemes belonged under thinking of the present invention belong to protection scope of the present invention.It should be pointed out that for the art
For those of ordinary skill, some improvements and modifications without departing from the principles of the present invention, the protection of the present invention should be regarded as
Scope.
Claims (6)
- A kind of 1. integrating device of thermoelectron frequency mixer and Terahertz quantum cascaded laser, it is characterised in that including：Cavity （1）, Terahertz quantum cascaded laser（2）, heat superconducting electronics frequency mixer（3）, parabolic mirror（4）And spectroscope（5）；Institute State cavity（1）It is fixed on Dewar refrigeration platform, the Terahertz quantum cascaded laser（2）, heat superconducting electronics frequency mixer （3）, parabolic mirror（4）And spectroscope（5）It is integrated in same cavity（1）In.
- 2. a kind of integrating device of heat superconducting electronics frequency mixer and Terahertz quantum cascaded laser as claimed in claim 1, It is characterized in that：The cavity（1）Including pedestal（6）And housing（7）, the pedestal（6）On offer and Dewar refrigeration platform The fixing screwed hole being adapted（8）, the housing（7）Trapezoidal body structure, housing（7）One side be and pedestal（6）In 45 ° Inclined-plane（9）, spectroscope（5）It is embedded to be arranged on inclined-plane（9）In, parabolic mirror（4）Installed in housing（7）Bottom surface on, Spectroscope（5）With parabolic mirror（4）In 45° angle, Terahertz quantum cascaded laser（2）Installed in housing（7）In with tiltedly Face（9）On relative side so that Terahertz quantum cascaded laser（2）Signal transmitting terminal and parabolic mirror（4）Phase It is right, heat superconducting electronics frequency mixer（3）Installed in Terahertz quantum cascaded laser（2）Ipsilateral on, heat superconducting electronics mixing Device（3）Signal receiving end and spectroscope（5）Relatively.
- 3. a kind of integrating device of heat superconducting electronics frequency mixer and Terahertz quantum cascaded laser as claimed in claim 2, It is characterized in that：The spectroscope（5）Using spectroscope film, spectroscope film window is against dewar window.
- 4. a kind of integrating device of heat superconducting electronics frequency mixer and Terahertz quantum cascaded laser as claimed in claim 2, It is characterized in that：The housing（7）Top surface be provided with medium frequency output end mouth（10）, housing（7）Side be provided with heat superconducting electronics Frequency mixer and QCL control signal（11）.
- 5. a kind of integrating device of heat superconducting electronics frequency mixer and Terahertz quantum cascaded laser as claimed in claim 1, It is characterized in that：The parabolic mirror（4）Diameter 20mm, focal length 12mm, the power coupling efficiency of integrating device are 0.945。
- A kind of 6. heat superconducting electronics frequency mixer and Terahertz quantum cascaded laser using as described in any in claim 1-5 Integrating device method of work, it is characterised in that including：By Terahertz quantum cascaded laser（2）, parabolic mirror（4）It is sequentially arranged at cavity（1）Respective design position, By spectroscope（5）Tighten and be fixed on design attitude, by heat superconducting electronics frequency mixer（3）Silicon lens center is fixed on, and will be solid The heat superconducting electronics frequency mixer set（3）Design attitude is fixed on silicon lens；By integrated cavity（1）It is fixed on the 4K refrigeration platforms of Dewar, spectroscope（5）Window is against dewar window, by Dewar Inside vacuumize and freeze and reach 4K to temperature；From Terahertz quantum cascaded laser（2）Launch terahertz signal, by parabolic mirror（4）Reflection, signal Incide and parabolic mirror（4）In the spectroscope of 45° angle（5）On, signal passes through spectroscope again（5）Reflection, incide Heat superconducting electronics frequency mixer（3）On the silicon lens of front end, after the focusing of silicon lens, Terahertz quantum cascaded laser（2） The terahertz signal pumping sent is to heat superconducting electronics frequency mixer（3）In.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710846796.6A CN107860741A (en) | 2017-09-19 | 2017-09-19 | The integrating device and method of thermoelectron frequency mixer and Terahertz quantum cascaded laser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710846796.6A CN107860741A (en) | 2017-09-19 | 2017-09-19 | The integrating device and method of thermoelectron frequency mixer and Terahertz quantum cascaded laser |
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| Publication Number | Publication Date |
|---|---|
| CN107860741A true CN107860741A (en) | 2018-03-30 |
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|---|---|---|---|
| CN201710846796.6A Pending CN107860741A (en) | 2017-09-19 | 2017-09-19 | The integrating device and method of thermoelectron frequency mixer and Terahertz quantum cascaded laser |
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|---|---|---|---|---|
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2017
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