Coherent and incoherent detection system and detection method based on superconducting thermal electron detector
A superconducting and detector technology, applied in the terahertz field, can solve problems such as limitations, and achieve the effects of improving test accuracy, realizing fast switching, and improving detection efficiency
Active Publication Date: 2022-03-01
ZIJINSHAN ASTRONOMICAL OBSERVATORY CHINESE ACAD OF SCI
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Since the sensitivity of the terahertz mixer is limited by the quantum limit noise during coherent detection, the lower limit of weak signal detection is limited to a certain extent
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[0023] The present invention is described in further detail now in conjunction with accompanying drawing.
[0024] Such as figure 1 As shown, the coherent and incoherent detection system based on superconducting thermionic detectors is characterized by: including chopper 1, beam coupler 2, terahertz local oscillator signal source 3, superconducting thermionic detectors 5, bias- T circuit 6, low-temperature low-noise amplifier 7, DC bias power supply 8, normal temperature intermediate frequency amplifier 9 and lock-in amplifier 10, spectrum analyzer;
[0025] The chopper 1 is connected to the signal input end of the beam coupler 2, the terahertz local oscillator signal source 3 is connected to the signal input end of the beam coupler 2, and the signal output end of the beam coupler 2 is connected to the superconducting thermal electron detector 5 signal connection, the superconducting thermal electron detector 5 is connected to the bias-T circuit 6, and the DC bias power suppl...
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The present invention is based on a coherent and incoherent detection system and detection method of a superconducting thermal electron detector, including a chopper, a beam coupler, a terahertz local oscillator signal source, a superconducting thermal electron detector, a bias-T circuit, a low temperature low Noise amplifier, DC bias power supply, normal temperature intermediate frequency amplifier and lock-in amplifier, spectrum analyzer, among which the low temperature low noise amplifier and normal temperature intermediate frequency amplifier together form the intermediate frequency amplification link, and the intermediate frequency amplification link and the superconducting thermal electron detector together form a coherent The receiving system of the characteristics of detection and non-coherent detection, this kind of detection system can simultaneously take into account and realize the rapid switching of continuous spectrum and high-resolution spectrum detection, obtain more comprehensive target characteristic information in a short time, and improve the detection efficiency of terahertz signals.
Description
technical field [0001] The present invention relates to the field of terahertz technology, specifically based on coherent and incoherent detection systems and detection methods of superconducting thermal electron detectors. Background technique [0002] Similar to other frequency bands, passive detection in the terahertz frequency band is divided into two modes: coherent detection and non-coherent detection. In the terahertz coherent detection mode, the amplitude and phase information of the signal can be detected at the same time, and it is mainly used in spectral line observation with high frequency resolution and antenna interference array with high spatial resolution. The incoherent detection mode in the terahertz frequency band can only detect the amplitude information of the signal, but cannot obtain its phase information. It is mainly used in low-frequency resolution continuum observations and mid-frequency resolution spectral line observations of spectrometers. Gene...
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IPC IPC(8): G01J3/28
CPCG01J3/28
Inventor 史生才林镇辉任远缪巍
Owner ZIJINSHAN ASTRONOMICAL OBSERVATORY CHINESE ACAD OF SCI