Electromagnetic wave sensor based on optical fiber and metamaterial
A metamaterial and electromagnetic wave technology, which is applied in the direction of electric power measurement by thermal method, can solve the problems of low detection sensitivity, susceptibility to electromagnetic interference, unfavorable production integration, etc., and achieve the effect of high detection sensitivity, favorable production integration, and simple structure
Active Publication Date: 2014-10-22
KUANG CHI INST OF ADVANCED TECH +1
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However, the above-mentioned existing electromagnetic wave sensors have low detection sensitivity, large volume, complex structure, are not conducive to production integration and are susceptible to electromagnetic interference
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[0023] Absorbing material refers to a material that can convert incident electromagnetic wave energy into heat energy or other forms of energy and dissipate it. The basic physical principle of the absorbing material is that the material can effectively absorb the incident electromagnetic wave, convert and dissipate the energy of the electromagnetic wave. The material should have two characteristics, namely impedance matching characteristic and attenuation characteristic. The impedance matching characteristic refers to the reflection characteristic formed by the electromagnetic wave incident on the surface of the absorbing material from free space and reflected by the surface of the absorbing material. When an ideal absorbing material achieves perfect impedance matching characteristics, the electromagnetic wave incident from free space should form zero reflection on the surface of the ideal absorbing material, that is, all electromagnetic waves enter the interior of the ideal ab...
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The invention relates to an optic fiber and metamaterial-based electromagnetic wave sensor which comprises a wave absorbing metamaterial, a first coupler, a first optic fiber arm, a second optic fiber arm and a second coupler, wherein the wave absorbing metamaterial is used for changing autologous temperature by absorbing electromagnetic waves and conducting the changed temperature to the first optic fiber arm; the first coupler is used for separating a light beam into a first light beam and a second light beam; the first optic fiber arm is used for conducting the first light beam and the second optic fiber arm is used for conducting the second light beam; when the temperature of the wave absorbing metamaterial changes to cause the temperature of the first optic fiber arm to change, the phase of the first light beam changes in response to the temperature change of the first optic fiber arm; and the phase-changed first light beam generates interference with the second light beam through the second coupler. The optic fiber and metamaterial-based electromagnetic wave sensor has the advantages of high detection sensitivity, small volume, simple structure, benefit in manufacturing and integration and no electromagnetic interference.
Description
technical field [0001] The invention relates to a sensor for detecting electromagnetic waves, in particular to an electromagnetic wave sensor based on optical fibers and metamaterials. Background technique [0002] Electromagnetic wave (also known as electromagnetic radiation) is an electric field and a magnetic field that oscillate in phase and are perpendicular to each other and move in the form of waves in space. Its propagation direction is perpendicular to the plane formed by the electric field and magnetic field, and effectively transmits energy and momentum. Classified by frequency, from low frequency to high frequency, electromagnetic waves include radio waves, microwaves, terahertz waves, infrared rays, visible light, ultraviolet light, X-rays, and gamma rays. [0003] The electromagnetic wave sensor is a device for obtaining electromagnetic wave radiation information. The existing electromagnetic wave sensor is usually composed of four basic parts: collector: respo...
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IPC IPC(8): G01R21/02
Inventor 刘若鹏徐冠雄
Owner KUANG CHI INST OF ADVANCED TECH