CN115173008A - Tubular channel type terahertz frequency divider based on Fabry-Perot resonance - Google Patents
Tubular channel type terahertz frequency divider based on Fabry-Perot resonance Download PDFInfo
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- CN115173008A CN115173008A CN202210684355.1A CN202210684355A CN115173008A CN 115173008 A CN115173008 A CN 115173008A CN 202210684355 A CN202210684355 A CN 202210684355A CN 115173008 A CN115173008 A CN 115173008A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
- H01P1/213—Frequency-selective devices, e.g. filters combining or separating two or more different frequencies
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P7/00—Resonators of the waveguide type
- H01P7/06—Cavity resonators
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/90—Non-optical transmission systems, e.g. transmission systems employing non-photonic corpuscular radiation
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Abstract
The invention relates to a tubular channel type terahertz frequency divider based on Fabry-Perot resonance, which is characterized in that the tubular channel type terahertz frequency divider is of an input multi-output circular tubular channel structure, broadband terahertz waves enter an input port of the terahertz frequency divider in a grazing incidence mode and then enter a plurality of paths of circular tubular output channels, the terahertz waves carry out Fabry-Perot resonance in the tubular channels, and a plurality of terahertz signals with different main frequencies are output through a plurality of circular tubular output ports. The terahertz wave frequency division can be realized by constructing tubular channels with different inner diameters in the homogeneous block material, the material is selected more (such as plastic, organic glass and the like), the processing method of the channel structure is simple (such as 3D printing, integral punching of the material and the like), and special cladding design is not needed, so that the complexity and the cost of the frequency divider are reduced. The spatial distribution of the frequency division signals is determined by the position arrangement of the output channels, and the frequency division signals can be output by a linear array or an area array and can be specially customized, so that the frequency division signals have strong expansibility for different application scenes.
Description
Technical Field
The invention relates to a terahertz regulation and control technology, in particular to a tubular channel type terahertz frequency divider based on Fabry-Perot resonance.
Background
Terahertz waves generally refer to electromagnetic waves with the frequency in the range of 0.1-10 THz, and due to the advantages of instantaneity, wide frequency, coherence, penetrability to nonpolar substances and the like, terahertz technology is widely applied to various fields of medicine, biology, materials science, chemistry, military, national defense, security inspection and the like.
Especially in the aspect of communication, the terahertz frequency band is also a core frequency band of the future 6G communication technology. However, compared with other mature frequency bands, a series of problems of the terahertz frequency band are still discovered, and the problems include the frequency division problem of the terahertz frequency band. The existing communication frequency division modes, such as a fused biconical taper optical fiber frequency divider, an integrated optical waveguide type wavelength division multiplexer and the like, are not suitable for terahertz frequency bands, and have complex structures and high manufacturing cost.
Disclosure of Invention
Aiming at the problem of terahertz frequency division, a tubular channel type terahertz frequency divider based on Fabry-Perot resonance is provided, the characteristic that the main frequency of terahertz Fabry-Perot (F-P) resonance can be regulated and controlled by the inner diameter of a channel is utilized, and frequency division of a terahertz frequency band is realized through a plurality of ports with different calibers.
The technical scheme of the invention is as follows: a tubular channel type terahertz frequency divider based on Fabry-Perot resonance is of an input-output circular tubular channel structure, broadband terahertz waves enter an input port of the terahertz frequency divider in grazing incidence mode and then enter a plurality of circular tubular output channels, the terahertz waves are subjected to Fabry-Perot resonance in the tubular channels, and a plurality of terahertz signals with different main frequencies are output through a plurality of circular tubular output ports.
Preferably, the diameter of the circular-tube-shaped output channel is determined by the size of the terahertz main frequency to be divided, and the terahertz signal main frequency output by the circular-tube-shaped output port is as follows:
wherein f is terahertz main frequency output by a certain output channel port, d is the inner diameter of the corresponding circular tubular output channel, and c is the light speed in vacuum; theta is an included angle between the terahertz wave incident into the input port and the normal line of the inner wall of the channel.
Preferably, the output channel ports are not limited to be distributed in a linear array or an area array in space.
Preferably, the terahertz frequency divider is manufactured by processing a channel structure in a homogeneous massive non-metal material.
A broadband terahertz wave frequency division method is characterized in that broadband terahertz waves enter an input port in a grazing incidence mode, the input port is divided into at least 2 tubular channels to be output, the terahertz waves carry out Fabry-Perot resonance in the tubular channels, terahertz waves with different main frequencies are output corresponding to output channels with different pipe diameters, and the relationship between the output terahertz wave main frequencies f and the diameter d of the output channels is as follows:
where c is the speed of light in vacuum; theta is an included angle between the terahertz wave incident into the input port and the normal line of the inner wall of the channel.
The invention has the beneficial effects that: according to the tubular channel type terahertz frequency divider based on Fabry-Perot resonance, tubular channels with different inner diameters are constructed in a homogeneous block material, terahertz wave frequency division can be achieved, the number of materials is large (such as plastic and organic glass), the processing method of the channel structure is simple (such as 3D printing and integral punching of the material), and special cladding design is not needed, so that the complexity and the cost of the frequency divider are reduced. The spatial distribution of the frequency division signals is determined by the position arrangement of the output channels, and the frequency division signals can be output by a linear array or an area array and can be specially customized, so that the frequency division signals have strong expansibility for different application scenes.
Drawings
Fig. 1 is a schematic structural diagram of an input port of a tubular channel-type terahertz frequency divider according to the present invention;
FIG. 2 is a schematic diagram of a frequency division structure of a tubular channel type terahertz linear array based on Fabry-Perot resonance in the invention;
fig. 3 is a schematic diagram of the structure of the area array frequency division output terminal of the present invention.
Detailed Description
The invention is described in detail below with reference to the figures and the specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
The broadband terahertz wave glancing incidence (glancing incidence refers to that light is transmitted from an optically thinner medium to an optically denser medium and glancing incidence is performed when the incidence angle is close to 90 degrees) enters an input port of the frequency divider, then enters a multi-path circular tubular output channel, terahertz waves perform F-P resonance in the tubular channel, finally a plurality of terahertz signals with different main frequencies are output by a plurality of circular tubular output ports, and the output channel ports can be distributed in a linear array or planar array form in space.
The terahertz main frequency divided by the different output channels is regulated and controlled by the inner diameter of the corresponding output channel, and the specific corresponding relation is
Wherein f is terahertz main frequency output by a certain output channel port, d is the inner diameter of the corresponding circular tubular output channel, c is the speed of light in vacuum, and 3 x 10 8 m/s; theta is an included angle between the terahertz wave incident into the input port and the normal line of the inner wall of the channel. As shown in fig. 1, which is a schematic view of the input port structure, the F-P resonance dominant frequency F depends only on the inner diameter d of the circular tube-shaped output channel, θ is an angle between the incident terahertz wave in the channel and the normal of the inner wall, and the angle in fig. 1 is 86.5 °.
Fig. 2 is a schematic diagram of a tubular channel type terahertz linear array frequency division structure, wherein a terahertz transmitting antenna 1 is adopted to generate a broadband terahertz wave grazing incidence frequency divider 2 input port, the broadband terahertz wave is output in the frequency divider 2 through different circular tubular output channels arranged in a linear array, and terahertz signals with different output main frequencies are detected by a plurality of receiving antennas 3 opposite to output ports. According to the formula, the inner diameters of different structures correspond to different main frequency outputs, when the required frequencies are 1.2THz, 0.7THz and 0.2THz, the required inner diameters of the output ports are 1.025mm, 1.756mm and 6.15mm respectively through calculation of the formula. After the frequency divider structure is processed according to the parameters, frequency division of the terahertz signals can be achieved according to needs.
Fig. 3 is a schematic structural diagram of an area array frequency division output end, and compared with linear array frequency division, under the condition that the inner diameter of an output port is not changed, only the spatial positions of the output ports need to be rearranged, and then two-dimensional plane frequency division of terahertz signals can be realized.
The material used by the tubular channel type terahertz frequency divider is basically not limited as long as the tubular channel type terahertz frequency divider is beneficial to structure processing, such as non-metallic materials like plastics and organic glass.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (5)
1. A tubular channel type terahertz frequency divider based on Fabry-Perot resonance is characterized in that the tubular channel type terahertz frequency divider is of an input multi-output circular tubular channel structure, broadband terahertz waves enter an input port of the terahertz frequency divider in a grazing incidence mode and then enter a plurality of paths of circular tubular output channels, the terahertz waves are subjected to Fabry-Perot resonance in the tubular channels, and a plurality of terahertz signals with different main frequencies are output through a plurality of circular tubular output ports.
2. The Fabry-Perot resonance-based tubular channel type terahertz frequency divider according to claim 1, wherein the diameter of the circular tubular output channel is determined by the size of terahertz main frequency needing to be divided, and the terahertz signal main frequency output by the circular tubular output port is as follows:
wherein, f is terahertz main frequency output by a certain output channel port, d is the inner diameter of the corresponding circular tubular output channel, and c is the light velocity in vacuum; theta is an included angle between the terahertz wave incident into the input port and the normal line of the inner wall of the channel.
3. The tubular channel terahertz frequency divider based on Fabry-Perot resonance as claimed in claim 1 or 2, wherein the output channel ports are not limited in space to be distributed in a linear array form or an area array form.
4. The tubular channel-type terahertz frequency divider based on Fabry-Perot resonance according to claim 3, wherein the terahertz frequency divider is manufactured by processing a channel structure inside a homogeneous massive non-metal material.
5. A frequency division method for broadband terahertz waves is characterized in that broadband terahertz waves enter an input port in a grazing incidence mode, the input port is divided into at least 2 tubular channels to be output, the terahertz waves carry out Fabry-Perot resonance in the tubular channels, terahertz waves with different main frequencies are output corresponding to output channels with different pipe diameters, and the relationship between the output terahertz wave main frequency f and the diameter d of the output channels is as follows:
wherein c is the speed of light in vacuum; theta is an included angle between the terahertz wave incident into the input port and the normal line of the inner wall of the channel.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210684355.1A CN115173008B (en) | 2022-06-17 | 2022-06-17 | Tubular channel terahertz frequency divider based on Fabry-Perot resonance |
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| CN202210684355.1A CN115173008B (en) | 2022-06-17 | 2022-06-17 | Tubular channel terahertz frequency divider based on Fabry-Perot resonance |
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Citations (5)
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|---|---|---|---|---|
| US20130195129A1 (en) * | 2012-01-30 | 2013-08-01 | Agilent Technologies, Inc. | Phase-continuous tunable laser |
| CN206147136U (en) * | 2016-10-31 | 2017-05-03 | 清华大学 | Terahertz wave leads device |
| CN107276540A (en) * | 2017-08-10 | 2017-10-20 | 四川久成泰安科技有限公司 | A kind of Terahertz image frequency suppresses mixting circuit |
| US20190020120A1 (en) * | 2017-06-26 | 2019-01-17 | Nidec Corporation | Method of producing a horn antenna array and antenna array |
| CN110793943A (en) * | 2019-11-20 | 2020-02-14 | 中国科学院电子学研究所 | Reflection type terahertz imaging method and device based on spiral phase contrast imaging |
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2022
- 2022-06-17 CN CN202210684355.1A patent/CN115173008B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130195129A1 (en) * | 2012-01-30 | 2013-08-01 | Agilent Technologies, Inc. | Phase-continuous tunable laser |
| CN206147136U (en) * | 2016-10-31 | 2017-05-03 | 清华大学 | Terahertz wave leads device |
| US20190020120A1 (en) * | 2017-06-26 | 2019-01-17 | Nidec Corporation | Method of producing a horn antenna array and antenna array |
| CN107276540A (en) * | 2017-08-10 | 2017-10-20 | 四川久成泰安科技有限公司 | A kind of Terahertz image frequency suppresses mixting circuit |
| CN110793943A (en) * | 2019-11-20 | 2020-02-14 | 中国科学院电子学研究所 | Reflection type terahertz imaging method and device based on spiral phase contrast imaging |
Non-Patent Citations (1)
| Title |
|---|
| ANDRÉ D. GOMES等: "Optical Harmonic Vernier Effect: A New Tool for High Performance Interferometric Fiber Sensors", 《SENSORS》, pages 1 - 18 * |
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