CN107655923B - A kind of adjustable THz wave transmission beam forming system of realization outbound course wide-angle - Google Patents
A kind of adjustable THz wave transmission beam forming system of realization outbound course wide-angle Download PDFInfo
- Publication number
- CN107655923B CN107655923B CN201710951759.1A CN201710951759A CN107655923B CN 107655923 B CN107655923 B CN 107655923B CN 201710951759 A CN201710951759 A CN 201710951759A CN 107655923 B CN107655923 B CN 107655923B
- Authority
- CN
- China
- Prior art keywords
- mirror
- phasing
- angle
- waveguide
- rotary parabolic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N24/00—Investigating or analyzing materials by the use of nuclear magnetic resonance, electron paramagnetic resonance or other spin effects
- G01N24/08—Investigating or analyzing materials by the use of nuclear magnetic resonance, electron paramagnetic resonance or other spin effects by using nuclear magnetic resonance
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
- G01R33/44—Arrangements or instruments for measuring magnetic variables involving magnetic resonance using nuclear magnetic resonance [NMR]
Landscapes
- Physics & Mathematics (AREA)
- High Energy & Nuclear Physics (AREA)
- General Physics & Mathematics (AREA)
- Biochemistry (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Aerials With Secondary Devices (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The invention is a kind of adjustable specular transmission beam forming system of realization outbound course wide-angle, its main feature is that it by the input/output window of corrugated waveguide, rotary parabolic reflecting mirror, adjustable angle phasing microscope group at, and the Transmission system that output field angle can be adjusted with output window direction is devised, very high efficiency of transmission is all kept within the scope of big angle change.Quasi- gaussian model passed through mould corrugated waveguide and is input to system in the invention, was radiated free space, and rotary parabolic reflecting mirror receives this quasi- Gaussian beam, the angulation change of wave beam after reflection, while pack.At this time according to the angle of corrugated waveguide output window, the angle of corresponding adjustment phase place corrective lens (eye protection).Then beams incident is eliminated to phasing Jing Chu, the phase difference of beam cross-section, to form the wave beam that can all meet Gaussian Profile in terms of phase and field intensity two, it can be coupled to well in the corresponding corrugated waveguide of output window.
Description
Technical field:
The present invention relates to a kind of adjustable specular transmission beam forming systems of the outbound course wide-angle applied to DNP-NMR, belong to
In high power THz wave transmission technique field.
Background technique:
Nuclear magnetic resonance (NMR) is the atomic nucleus for capableing of nonzero spin, absorbs and re-emits in external magnetic field low-resonance
The physical phenomenon of a certain specific frequency electromagnetic radiation.NMR is widely used, and in security protection detection, NMR is suitable for non-destructively analyzing
Sample, especially analysis hazardous samples, medically NMR are commonly applied to medical diagnosis and imaging, and chemical field is true by NMR spectra
Determine the molecular structure of compound.But the sensitivity of conventional NMR spectrum is very low, so sensitivity is to this technology
Success is promoted most important.
Since nineteen forty-six observes NMR signal, many new methods, new technology have been derived to improve the sensitivity of NMR, such as
Cross polarization, angle lap rotation, polarization transfer etc..And polarization transfer is a kind of critically important sensitivity Enhancement Method, this process
It occurs mainly between atomic nucleus, between atomic nucleus and electronics.Early in nineteen fifty-three, Overhauser is proposed by being saturated in metal
The transition of electronics polarization from electron transmission to atomic nucleus, after confirmed by experiment.And the polarization between electronics and atomic nucleus
Transfer is exactly dynamical nuclear polarization (DNP), it, which passes to the high polarization of electron spin to nuclear spin, increases nuclear magnetic resonance reality
The sensitivity tested, polarization transmitting are driven by high-frequency millimeter wave or terahertz emission.
Level spacing can be increased by improving magnetic field strength, increase spin energy level population difference Δ n, to improve nuclear magnetic resonance
Sensitivity.Modern NMR spectrum technology develops to high field direction.Developed based on electron cyclotron stimulated radiation principle
The fast wave Cyclotron to get up --- Terahertz gyrotron is used as the terahertz emission source of DNP-NMR.Meanwhile in order to biography
Defeated lines matching improves coupling efficiency, it is desirable that the output field distribution of radiation source is ideal or close to ideal free space height
This distribution.
THz wave frequency band needed for DNP-NMR system is very narrow, and transmission line can be considered as single-frequency transmission.It is a kind of common
Structure is to use mould corrugated waveguide to transmit quasi- gaussian model, it has the characteristics that significant low-loss.Because limited sample
Space limitation, the end of Transmission system are needed energy from one lesser wave of radius of the biggish corrugated waveguide feed-in of a radius
It is transmitted in corrugated waveguide, realizes that this process needs an optical reflection microscope group, it is transferred to NMR and samples after focusing quasi- Gaussian beam
In device.
Summary of the invention:
The purpose of the present invention is improving to existing DNP-NMR system, realize that a kind of outbound course wide-angle is adjustable
Terahertz wave beam transmission, pack and phasing system, it is connected to a biggish ripple of radius in DNP-NMR system
The output end of waveguide, focusing and the phasing of wave beam are realized by rotary parabolic mirror and phasing mirror respectively, to export symbol
Close NMR sample needed for quasi- Gaussian beam, realize high conversion efficiency, low transmission loss, output angle is adjustable, high vector Gaussian at
Divide and take into account the Transmission system of its compactedness.
Outstanding feature of the invention is for complicated actual conditions, and devising output field angle can be with output window direction
The transmission beam forming system of adjustment can change within the scope of 90 °, and suffer from very high transmission within the scope of big angle change
Efficiency (is greater than 95%).
The purpose of the present invention has following technical measures realization:
System includes two mirror surfaces, rotary parabolic reflecting mirror and phasing mirror.
Incident quasi- Gaussian beam is parallel to parabolic mirror axis direction.
The angle of phasing mirror can be in phasing mirror support with the angular adjustment according to output waveguide, angular values
On angle display on check.
There is perturbation on phasing mirror, to realize phasing function.
The present invention has the advantage that
Transmission beam forming system is high-efficient, and the gauss component of output field is fine, and very little is lost.
The output of system can adjust angle with actual needs, have very well to situation and environment complicated in actual use
Adaptability, and still ensure that good laser propagation effect (efficiency of transmission be greater than 95%).
Detailed description of the invention:
Fig. 1 is to realize the adjustable specular transmission beam forming system schematic diagram of outbound course wide-angle.
Fig. 2 is the short distance schematic diagram of the phasing mirror part of system.
Fig. 3 is that phasing mirror is intended to (unit: rice).
In figure:
1 input corrugated waveguide, 2 rotary parabolic reflecting mirrors, 3 phasing mirrors, 4 output ripple waveguides, 5 brackets and pedestal,
Including input/output corrugated waveguide bracket, phasing mirror support.
Specific embodiment:
As shown in Figure 1, realize the adjustable specular transmission beam forming system of outbound course wide-angle mainly by input waveguide 1,
Rotary parabolic reflecting mirror 2, phasing mirror 3, input waveguide 4, bracket 5 form.Bracket is specific again by the branch of support input waveguide
Frame supports the bracket of phasing mirror and angle display, the bracket composition of support rotary parabolic reflecting mirror.Support input waveguide
Bracket fluting with input 1 phase of corrugated waveguide, lower end is connected with pedestal.Phasing mirror support is connected with phasing mirror 3
And be fixed on the base, angle display is rigidly connected by slide bar and phasing mirror, and slide bar relative phase corrects mirror support
It can be with flexible rotating.Rotary parabolic reflecting mirror 2 is taken from a part of complete rotary parabolic mirror, rotary parabolic reflecting mirror
The fixed rotary parabolic reflecting mirror 2 of bracket is simultaneously fixed on the base.Wave beam from input corrugated waveguide 1, reflects through rotary parabolic
It is incident on phasing mirror 3 after the reflection of mirror 2 and convergence, wave beam is emitted in output ripple waveguide 4 after phasing.
Specific embodiment is that quasi- gaussian model passed through mould corrugated waveguide and is input to system, is radiated free space, rotation
Turn parabolic mirror and receives this quasi- Gaussian beam, the angulation change of wave beam after reflection, while pack.Basis is needed at this time
The angle of corrugated waveguide output window, the correspondingly angle of adjustment phase place corrective lens (eye protection).Subsequent beams incident is to phasing Jing Chu, wave
The phase difference of area of beam is eliminated, so that the wave beam that can all meet Gaussian Profile in terms of phase and field intensity two is formed, it
It can be coupled to well in the corresponding corrugated waveguide of output window.
Pedestal long 100mm, wide 60mm, high 2mm；Input the high 85mm of corrugated waveguide bracket；The high 20mm of phasing mirror support,
Phasing mirror length and width are 30mm, and phasing mirror support is away from base edge 10mm；Rotary parabolic mirror support high 35mm, it is wide
25mm；The high 90mm of rotary parabolic reflecting mirror, lower edge connect with rotary parabolic mirror support, away from base edge 10mm；Output wave ripple
Inducement angle can change at any time, fixed form multiplicity, therefore not provide.The operating mode of input is linear polarization mode HE11Mode.Through
It calculates, when output window position changes within the scope of -45 °~45 °: transmission whole efficiency is greater than 98%, and waist radius is respectively
6.0mm and 1.7mm.Scalar gauss component: between -20 °~35 °: greater than 99%, between -43 °~45 °: greater than 95%；
Vector Gaussian ingredient: between -27 °~42 °: greater than 95%.
It can calculate that the angle of phasing mirror (is relative to perpendicular by the angle of output window as needed and actual conditions
Histogram to angle, output window inclination angle, which is negative, indicates that port angular is on the upper side, and the inclination angle of phasing mirror is positive and indicates mirror angle
It is on the upper side), it is linear relationship between them, it is convenient for practical measuring and calculating, their conversion is provided referring to table (angle: °):
| The inclination angle of output window | -45 | -40 | -35 | -30 | -25 | -20 | -15 | -10 | -5 | 0 |
| The inclination angle of phasing mirror | -0.7 | 1.8 | 4.3 | 6.8 | 9.3 | 11.8 | 14.3 | 16.8 | 19.3 | 21.8 |
| The inclination angle of output window | 5 | 10 | 15 | 15 | 25 | 30 | 35 | 40 | 45 | |
| The inclination angle of phasing mirror | 24.3 | 26.8 | 29.3 | 29.3 | 34.3 | 36.8 | 39.3 | 41.8 | 44.3 |
Claims (1)
1. a kind of adjustable specular transmission beam forming system of realization outbound course wide-angle, which is characterized in that including incoming wave ripple
It leads (1), rotary parabolic reflecting mirror (2), phasing mirror (3), output ripple waveguide (4), bracket (5)；Bracket includes that support is defeated
Enter the bracket of waveguide, support the bracket of phasing mirror and angle display, supports the bracket of rotary parabolic reflecting mirror；It supports defeated
The bracket fluting for entering waveguide is connected with input corrugated waveguide (1), and lower end is connected with pedestal；Phasing mirror support and phase school
Telescope direct (3) is connected and is fixed on the base, and angle display is rigidly connected by slide bar and phasing mirror (3), and slide bar is opposite
Phasing mirror support being capable of flexible rotating；Rotary parabolic reflecting mirror (2) is taken from a part of complete rotary parabolic mirror, rotation
Turn parabolic reflective mirror support fixed rotary parabolic reflecting mirror (2) and is fixed on the base；Wave from input corrugated waveguide (1)
Beam is reflected and is assembled through rotary parabolic reflecting mirror (2) and is incident on phasing mirror (3) later, the wave beam after phasing
It is emitted in output ripple waveguide (4)；Pedestal long 100mm, wide 60mm, high 2mm；Input the high 85mm of corrugated waveguide bracket；Phase
The high 20mm of mirror support is corrected, phasing mirror length and width are 30mm, and phasing mirror support is away from base edge 10mm；Rotary parabolic
Mirror support high 35mm, wide 25mm；The high 90mm of rotary parabolic reflecting mirror, lower edge connects with rotary parabolic mirror support, away from base edge
10mm；Output ripple waveguiding angles are alterable, and the operating mode of input is linear polarization mode HE11 mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710951759.1A CN107655923B (en) | 2017-10-13 | 2017-10-13 | A kind of adjustable THz wave transmission beam forming system of realization outbound course wide-angle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710951759.1A CN107655923B (en) | 2017-10-13 | 2017-10-13 | A kind of adjustable THz wave transmission beam forming system of realization outbound course wide-angle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107655923A CN107655923A (en) | 2018-02-02 |
| CN107655923B true CN107655923B (en) | 2019-05-03 |
Family
ID=61117772
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710951759.1A Active CN107655923B (en) | 2017-10-13 | 2017-10-13 | A kind of adjustable THz wave transmission beam forming system of realization outbound course wide-angle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107655923B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109901086A (en) * | 2019-03-29 | 2019-06-18 | 电子科技大学 | A kind of matched quasi-optical cellular construction of realization wave beam |
| CN111948782B (en) * | 2020-08-31 | 2022-06-28 | 长光卫星技术股份有限公司 | Overturning detection device of large-diameter reflector component |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1922519A (en) * | 2004-08-23 | 2007-02-28 | 莫莱克斯公司 | System and tapered waveguide for improving light coupling efficiency between optical fibers and integrated planar waveguides and method of manufacturing same |
| CN1977198A (en) * | 2004-06-29 | 2007-06-06 | 3M创新有限公司 | Method for making an optical waveguide assembly with integral alignment features |
| WO2007104975A1 (en) * | 2006-03-13 | 2007-09-20 | Oxford Instruments Molecular Biotools Limited | Mnr spectroscopy with multiple-coil probes |
| CN204289675U (en) * | 2014-11-18 | 2015-04-22 | 中国电子科技集团公司第十研究所 | Full frequency band covers the coupling transmission of Terahertz frequency range |
| CN105356013A (en) * | 2015-11-20 | 2016-02-24 | 重庆邮电大学 | High-order asymmetric body mode cyclotron oscillation tube quasi-optical mode transformer |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9715988B2 (en) * | 2011-01-29 | 2017-07-25 | Calabazas Creek Research, Inc. | Gyrotron whispering gallery mode coupler with a mode conversion reflector for exciting a circular symmetric uniform phase RF beam in a corrugated waveguide |
-
2017
- 2017-10-13 CN CN201710951759.1A patent/CN107655923B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1977198A (en) * | 2004-06-29 | 2007-06-06 | 3M创新有限公司 | Method for making an optical waveguide assembly with integral alignment features |
| CN1922519A (en) * | 2004-08-23 | 2007-02-28 | 莫莱克斯公司 | System and tapered waveguide for improving light coupling efficiency between optical fibers and integrated planar waveguides and method of manufacturing same |
| WO2007104975A1 (en) * | 2006-03-13 | 2007-09-20 | Oxford Instruments Molecular Biotools Limited | Mnr spectroscopy with multiple-coil probes |
| CN204289675U (en) * | 2014-11-18 | 2015-04-22 | 中国电子科技集团公司第十研究所 | Full frequency band covers the coupling transmission of Terahertz frequency range |
| CN105356013A (en) * | 2015-11-20 | 2016-02-24 | 重庆邮电大学 | High-order asymmetric body mode cyclotron oscillation tube quasi-optical mode transformer |
Non-Patent Citations (1)
| Title |
|---|
| Progress Toward Optimization of Phase-Correcting Mirrors for a Multifrequency 1-MW Gyrotron;Xiaokang Yang et al.;《IEEE TRANSACTIONS ON PLASMA SCIENCE》;20060630;第34卷(第3期);652-658 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107655923A (en) | 2018-02-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8259022B2 (en) | Ultra low loss waveguide for broadband Terahertz radiation | |
| CN107655923B (en) | A kind of adjustable THz wave transmission beam forming system of realization outbound course wide-angle | |
| Nanni et al. | Low-loss transmission lines for high-power terahertz radiation | |
| CN107271470B (en) | A kind of THz wave transmission beam forming system | |
| WO2020037838A1 (en) | Terahertz leaky wave antenna measurement system | |
| CN113721173B (en) | Optical fiber SERF atomic magnetometer device based on reflection type bidirectional pumping | |
| Oda et al. | Measurement of RF transmission mode in ITER relevant EC H&CD transmission line | |
| CN107356911A (en) | A kind of device for reducing laser radar system transmitting laser beam divergence | |
| Gerhard et al. | Coupling into tapered metal parallel plate waveguides using a focused terahertz beam | |
| CN108649344A (en) | A method of being used to prepare Terahertz lens antenna group | |
| Solikhov et al. | Stimulated Brillouin scattering in the field of a two-dimensionally localized pumping wave | |
| Chusseau et al. | Coupling and propagation of Sommerfeld waves at 100 and 300 GHz | |
| CN109901086A (en) | A kind of matched quasi-optical cellular construction of realization wave beam | |
| CN114152249B (en) | Narrow-speed-distribution high-flux cold atomic beam preparation device and method | |
| CN115831429A (en) | Diffuse reflection device for pre-cooling magneto-optical trap and laser cooling method | |
| JP3716940B2 (en) | Measuring method of electromagnetic wave absorption characteristics | |
| Beyer et al. | Loss measurements of the beam waveguide | |
| Linardakis et al. | Plasma-based lens for microwave beam steering | |
| CN110535021B (en) | Wavelength width tuning deep ultraviolet laser system with unchanged direction | |
| CN208125572U (en) | A kind of optical system of high-precision atmosphere particle monitoring radar | |
| Chen et al. | Gaussian beam modes analysis for off-axis mirror with feed position displacement | |
| CN110231623A (en) | A kind of quasi-optical light path device detecting plasma properties | |
| CN217562834U (en) | Lens for terahertz device and terahertz device | |
| CN114865257B (en) | Beam transmission device applied to enhanced nuclear magnetic resonance system | |
| Sangawa | Gradient index lens antennas with controllable aperture field distributions |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |