Terahertz effective radiation power high-accuracy measurement technology based on twinborn compensation model

Abstract

The invention discloses a Terahertz effective radiation power high-accuracy measurement technology based on a twinborn compensation model, and belongs to the technical field of Terahertz power measurement. The Terahertz effective radiation power comprises the following steps: constructing a twinborn compensation model of which other conditions are the same as those of a Terahertz measurement device except that a Terahertz signal is not received, and realizing measurement of thermal radiation noise power such as environment thermal radiation and circuit thermal radiation on time domain distribution; when a terahertz radiation source works, a terahertz power measuring device is used for measuring an overall detection signal containing terahertz effective power signals and thermal radiation noise complex coupling; and through differential processing of the total detection signal and the thermal radiation noise, complex decoupling of the terahertz effective power signal and the thermal radiation noise is realized, so that the terahertz effective radiation power is accurately obtained. Furthermore, corresponding twin compensation models are configured according to different terahertz radiation power measuring devices, so that high-accuracy measurement of the terahertz radiation power by different measuring devices can be realized.

Description

Technical Field

[0001] This invention belongs to the field of terahertz power measurement technology, and specifically relates to a high-accuracy measurement technology for terahertz effective radiated power based on a twin compensation model. Background Technology

[0002] Terahertz waves refer to electromagnetic waves with frequencies ranging from 0.1 to 10 THz, situated at the intersection of electronics and photonics. Due to their unique frequency band, terahertz waves possess distinctive characteristics such as strong penetration, wide bandwidth, and high spectral resolution, making them highly promising for applications in communications, imaging, and spectral analysis. However, the lack of effective methods for detecting various parameters of terahertz waves (power, frequency, polarization, and phase, etc.) has long hampered the development of current terahertz technology, leaving technological gaps and failing to meet the needs of high-end terahertz instrument design, production, and use, let alone the rapidly evolving demands of various cutting-edge scientific fields. Therefore, solving the problem of accurate measurement of terahertz parameters is a crucial issue that urgently needs to be addressed to achieve wider application of terahertz technology.

[0003] Power is one of the key parameters of terahertz waves, and accurate power measurement is fundamental to the rapid development of fields such as medical imaging, environmental monitoring, security inspection, and military communications. Typically, radiated power is measured using a terahertz radiation power meter. The specific measurement principle involves converting the incident terahertz signal into a thermal signal or similar form through an absorption conversion structure, and then measuring and displaying the thermal signal to output the corresponding terahertz radiated power. Therefore, a terahertz radiation power meter can effectively measure terahertz radiated power.

[0004] However, in the actual measurement of terahertz radiation power, a series of thermal radiation noises, such as background environmental thermal radiation and circuit thermal radiation, form a complex coupling relationship with the effective terahertz radiation signal. This results in the actual converted thermal signal containing not only the weak thermal signal converted from terahertz radiation but also the noise thermal signal converted from thermal radiation noise, making it difficult to accurately measure the actual terahertz radiation power. Therefore, how to reduce the influence of noise during terahertz radiation power measurement is one of the urgent problems to be solved to achieve high-accuracy measurement of terahertz radiation power. Summary of the Invention

[0005] A high-accuracy measurement technique for terahertz effective radiated power based on a twin compensation model is characterized by the fact that, during the actual measurement of terahertz radiated power, due to the presence of thermal radiation noise (from the environment, circuitry, etc.), the obtained overall detection signal contains not only the terahertz effective power signal but also thermal radiation noise. To achieve high-accuracy measurement of terahertz radiated power, a twin compensation model identical to the measuring device is configured. Except for not receiving terahertz signals, all other conditions are the same as the measuring device, enabling the measurement of thermal radiation noise. The overall detection signal obtained by the measuring device is differentially processed with the measured thermal radiation noise to decouple the terahertz effective radiation signal from the thermal radiation noise, thereby achieving a more accurate measurement of the terahertz effective radiated power.

[0006] The above-mentioned high-accuracy measurement technology of terahertz effective radiation power based on twin compensation model is characterized in that: the measuring device used is usually composed of a terahertz radiation source, a terahertz beam collimator, a terahertz power attenuator, an aperture and a terahertz power meter, wherein the terahertz power attenuator may not be used.

[0007] The above-mentioned high-accuracy measurement technology of terahertz effective radiation power based on twin compensation model is characterized in that: the measuring device performs the measurement in the working state of the terahertz radiation source, realizing the measurement of the overall detection signal including terahertz effective radiation power and thermal radiation noise.

[0008] The above-mentioned high-accuracy measurement technology of terahertz effective radiation power based on twin compensation model is characterized in that: the twin compensation model used is the same as the measurement device, which is also composed of terahertz radiation source, terahertz beam collimator, terahertz power attenuator, aperture and terahertz power meter.

[0009] The aforementioned high-accuracy measurement technique for terahertz effective radiated power based on a twin compensation model is characterized in that: the twin compensation model performs the measurement when the terahertz radiation source is not in operation, thereby achieving the measurement of the time-domain distribution of thermal radiation noise.

[0010] The above-mentioned high-accuracy measurement technology of terahertz effective radiated power based on twin compensation model is characterized by: performing differential processing on the overall detection signal and thermal radiation noise obtained by simultaneous measurement to decouple the terahertz effective radiated power from the thermal radiation noise, thereby achieving high-accuracy measurement of terahertz radiated power.

[0011] This invention has the following innovations and advantages:

[0012] 1. This invention proposes a method for measuring thermal radiation noise based on a twin compensation model. Typically, the thermoelectric conversion circuit used in terahertz power meters has high temperature resolution, and even slight temperature changes caused by ambient and circuit thermal radiation noise can significantly affect the measurement results. By configuring a twin compensation model identical to the terahertz radiation power measurement device, except for not receiving terahertz radiation signals, all other conditions are the same as the measurement device. This allows for the measurement of the spatial distribution of temperature noise caused by thermal radiation noise, providing a foundation for high-accuracy measurement of subsequent terahertz effective radiation power.

[0013] 2. This invention proposes a method for decoupling terahertz effective power signals from thermal noise based on differential signal processing. In actual terahertz radiation power measurement, the overall detection signal obtained by the terahertz radiation power measuring device comprises two parts: the terahertz effective power signal and thermal radiation noise. By differentially processing the overall detection signal with the thermal noise signal obtained from the aforementioned twin measurement model, a complex decoupling of the terahertz effective power signal from the thermal radiation noise is achieved, thereby improving the accuracy of terahertz radiation power measurement.

[0014] 3. This invention proposes a general method for high-accuracy measurement of terahertz radiation power based on a twin compensation model. High-accuracy measurement of terahertz radiation power is achieved by configuring a twin compensation model. The device used in this method is simple and easy to operate. Without increasing system complexity, only a twin compensation model identical to the measuring device is needed to decouple the effective terahertz power signal from thermal radiation noise. Therefore, this is a general method for high-accuracy measurement of terahertz radiation power.

[0015] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0016] The accompanying drawings described below are merely some examples. Those skilled in the art can derive other drawings from these drawings without any inventive effort. In the drawings:

[0017] Figure 1 This is a schematic diagram of the high-accuracy measurement device for terahertz effective radiated power based on the twin compensation model described in this invention.

[0018] Figure 2 This is a schematic diagram of the terahertz radiation power measuring device described in this invention.

[0019] Figure 3 This is a schematic diagram of the twin compensation model device described in this invention.

[0020] Figure 4This is a schematic diagram of the time-domain distribution of thermal radiation noise measured by the twin compensation model as described in this invention.

[0021] Figure 5 This is a schematic diagram of the overall detection signal obtained by the terahertz radiation power measuring device described in this invention.

[0022] Figure 6 This is a schematic diagram illustrating the high-accuracy measurement of terahertz effective power signals achieved through differential processing of the overall detection signal and thermal radiation noise, as described in this invention. Detailed Implementation

[0023] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings:

[0024] Appendix Figure 1 This is a schematic diagram of the high-accuracy terahertz effective radiation power measurement device based on the twin compensation model described in this invention. In the diagram, 1 is a terahertz radiation source, 2 is a terahertz beam collimator, 3 is an aperture, 4 is a terahertz radiation power meter, 5 is a stage, and 6 is a terahertz beam. This device enables high-accuracy measurement of terahertz radiation power.

[0025] Appendix Figure 2 This is a schematic diagram of the terahertz radiation power measuring device described in this invention. The device performs measurements when the terahertz radiation source is operating, and the resulting measurement is a total detection signal that includes the effective terahertz radiation signal and thermal radiation noise.

[0026] Appendix Figure 3 This is a schematic diagram of the twin compensation model described in this invention. Except for the terahertz radiation source not being operational, the device operates under the same conditions as the terahertz radiation power measurement device, and the resulting measurement is thermal radiation noise including ambient thermal radiation and circuit thermal radiation.

[0027] Appendix Figure 4 This is a schematic diagram of the time-domain distribution of thermal radiation noise measured by the twin compensation model according to the present invention. It shows the measurement results of the twin compensation model device when the terahertz radiation source is not working.

[0028] Appendix Figure 5 This is a schematic diagram of the overall detection signal obtained by the terahertz radiation power measuring device according to the present invention, and it shows the measurement results of the terahertz radiation power measuring device when the terahertz source is working.

[0029] Appendix Figure 6This is a schematic diagram illustrating the high-accuracy measurement of terahertz effective power signals achieved through differential processing of the overall detection signal and thermal radiation noise, as described in this invention. By differentially processing the overall detection signal and thermal radiation noise, a complex decoupling of the terahertz effective power signal and thermal radiation noise is achieved, thereby accurately obtaining the terahertz effective radiation power and improving the accuracy of terahertz radiation power measurement.

Claims

1. A high-accuracy measurement technique for terahertz effective radiated power based on a twin-compensation model, characterized in that: In the process of measuring the power of terahertz radiation, the total detection signal obtained contains not only the effective power signal of terahertz radiation, but also the thermal radiation noise due to the existence of thermal radiation noise (environment, circuit, etc.). In order to realize high-accuracy measurement of the power of terahertz radiation, a twin compensation model identical to the measuring device is configured, except that it does not receive the terahertz signal, and the rest of the conditions are the same as the measuring device, to realize the measurement of the thermal radiation noise. The total detection signal obtained by the measuring device is processed by difference with the measurement of the thermal radiation noise, to realize the decoupling of the effective power signal of terahertz radiation and the thermal radiation noise, so as to more accurately measure the effective power of terahertz radiation.

2. The high-accuracy measurement technique of effective radiated power in terahertz based on a twin-compensation model according to claim 1, characterized in that: The measuring device is usually composed of a terahertz radiation source, a terahertz beam collimator, a terahertz power attenuator, an aperture and a terahertz power meter, wherein the terahertz power attenuator can not be used.

3. The high-accuracy measurement technique of effective radiated power in terahertz based on a twin-compensation model according to claim 1, characterized in that: The measuring device measures in the working state of the terahertz radiation source, to realize the measurement of the total detection signal containing the effective power of terahertz radiation and the thermal radiation noise.

4. The high-accuracy measurement technique of effective radiated power in terahertz based on a twin-compensation model according to claim 1, characterized in that: The twin compensation model is identical to the measuring device and is also composed of a terahertz radiation source, a terahertz beam collimator, a terahertz power attenuator, an aperture and a terahertz power meter.

5. The high-accuracy measurement technique of effective radiated power in terahertz based on a twin-compensation model according to claim 1, characterized in that: The twin compensation model measures in the state that the terahertz radiation source is not working, to realize the measurement of the thermal radiation noise in the time domain distribution.

6. The high-accuracy measurement technique of effective radiated power in terahertz based on a twin-compensation model according to claim 1, characterized in that: The total detection signal and the thermal radiation noise measured at the same time are processed by difference, to decouple the effective power of terahertz radiation and the thermal radiation noise, and to realize high-accuracy measurement of the power of terahertz radiation.

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