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Device and method for detecting terahertz signal multi-dimensional image through dual fourier transformation

A technology of Fourier transform and image detection, which is applied in the field of multi-dimensional image detection devices for terahertz signals, can solve problems such as system integration technology bottlenecks, achieve good quality of observation data, and improve detection efficiency

Active Publication Date: 2014-07-23
ZIJINSHAN ASTRONOMICAL OBSERVATORY CHINESE ACAD OF SCI
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Problems solved by technology

Therefore, the development of ultra-large-scale terahertz direct detection focal plane array imaging Fourier spectrometer equipment will inevitably have a bottleneck problem in system integration technology

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  • Device and method for detecting terahertz signal multi-dimensional image through dual fourier transformation

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Embodiment Construction

[0043] In order to clarify the technical scheme and technical purpose of the present invention, the present invention will be further introduced below in conjunction with the accompanying drawings and specific implementation methods.

[0044] Such as figure 1 As shown, a double Fourier transform terahertz signal multi-dimensional image detection device includes:

[0045] The focal plane array receiver 2 is used to detect terahertz signals, including a KID detector array 21 and a broadband low-temperature low-noise amplifier 22 for amplifying and outputting the comb signal of the KID detector array; The number of pixels of the KID detector array is n×m, wherein n and m are integers greater than or equal to 2, preferably both n and m are 8, that is, the KID detector array includes 64 pixels. The KID detector is a quasi-optical high-sensitivity superconducting KID direct detector detector.

[0046] The spectroscopic device is preferably a Michelson interferometer, including a f...

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Abstract

The invention discloses a device and method for detecting a terahertz signal multi-dimensional image through dual Fourier transformation. The device comprises a focal plane array receiver, a light splitting device, a frequency division multiplexing readout device and a system control module. A terahertz signal is outputted to a KID detector array after being processed by the light splitting device, a multi-tone signal generated by the frequency division multiplexing readout module is inputted to the KID detector array of the focal plane array receiver, and a multi-tone signal outputted by the KID detector array is outputted to the frequency division multiplexing readout module after being processed by a broadband low-temperature and low-noise amplifier so that real-time spectrum processing can be conducted on the multi-tone signal. The system control module controls the light splitting device and the frequency division multiplexing readout module, reads a broadband continuous spectrum signal amplitude and spectrum signal interference map, conducts low-medium resolution spectrum processing on the interference map, and conducts multi-dimensional terahertz image signal processing on the read signal. According to the device and the method, the technology of highly flexibly detecting a terahertz signal broadband continuous spectrum and low-medium resolution spectrum map can be achieved, and the terahertz signal multi-dimensional image can be detected.

Description

technical field [0001] The present invention relates to a terahertz signal multi-dimensional image detection device, in particular to a terahertz signal multi-dimensional image high-sensitivity detection device based on KID (Kinetic Inductance Detector) detector array double Fourier transform and a terahertz signal multi-dimensional image detection device based on the detection device. Image detection method. Background technique [0002] Terahertz is generally defined as the frequency range of 0.1~10THz. Terahertz single-antenna telescope is the main observation equipment for terahertz astronomical observation research. Its most important advantage is the high-efficiency mapping observation of celestial objects by using focal plane array receivers. . At present, ground-based single-antenna terahertz telescope systems such as APEX, ASTE, CCAT, and JMCT, as well as space or airborne terahertz / far-infrared telescopes such as Herschel, JAXA, SPICA, and SOFIA, are equipped or p...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J3/28
Inventor 史生才林镇辉李婧
Owner ZIJINSHAN ASTRONOMICAL OBSERVATORY CHINESE ACAD OF SCI
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