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 PDF

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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
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mirror
phasing
angle
waveguide
rotary parabolic
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CN107655923A (en
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刘頔威
沈皓
王维
宋韬
邓世超
张宁
王诚海
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University of Electronic Science and Technology of China
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N24/00Investigating or analyzing materials by the use of nuclear magnetic resonance, electron paramagnetic resonance or other spin effects
    • G01N24/08Investigating or analyzing materials by the use of nuclear magnetic resonance, electron paramagnetic resonance or other spin effects by using nuclear magnetic resonance
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00Arrangements or instruments for measuring magnetic variables
    • G01R33/20Arrangements or instruments for measuring magnetic variables involving magnetic resonance
    • G01R33/44Arrangements or instruments for measuring magnetic variables involving magnetic resonance using nuclear magnetic resonance [NMR]

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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

A kind of adjustable THz wave transmission beam forming system of realization outbound course wide-angle
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.
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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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Patent Citations (5)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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 *

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