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Terahertz spectrum measuring system and method for analyzing terahertz spectrum of substance

A spectral measurement and terahertz technology, which is applied in the field of terahertz spectral analysis, can solve the problems that cannot be retuned, and the system structure cannot be directly used to detect the terahertz spectrum of substances, so as to avoid the effect of injection locking

Active Publication Date: 2019-08-16
SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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Problems solved by technology

[0004] Although the on-chip terahertz dual-frequency comb system has been developed, it cannot be directly used to detect the terahertz spectrum of matter due to the defects of its system structure, and it is still a long way from being practical.
In addition, once the on-chip dual frequency comb system is fabricated, the coupling efficiency between the two frequency combs is fixed and cannot be retuned

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Embodiment Construction

[0027] A terahertz spectrum measurement system proposed by the present invention will be further described in detail below with reference to the drawings and specific embodiments.

[0028] see figure 1 , 2 ,in figure 1 It is a structural schematic diagram of a terahertz spectrum measurement system in a specific embodiment of the present invention. figure 2 It is a schematic diagram of the connection relationship of a terahertz quantum cascade laser in a terahertz spectrum measurement system in a specific embodiment of the present invention.

[0029] In this specific embodiment, a terahertz spectrum measurement system is provided, including: two terahertz quantum cascade lasers 1, the exit ports of which are arranged oppositely; between mouths.

[0030] In a specific implementation manner, the terahertz quantum cascade laser 1 is a semiconductor laser, and the exit ports of two terahertz quantum cascade lasers 1 are arranged opposite to each other, and the lasing surfaces ...

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Abstract

The invention relates to a terahertz spectrum measuring system and a method for analyzing a terahertz spectrum of a substance. The terahertz spectrum measuring system comprises two terahertz quantum cascade lasers whose emission ports are arranged in an opposite manner and a vacuum cover arranged between the emission ports of the two terahertz quantum cascade lasers. According to the terahertz spectrum measuring system and the method for analyzing the terahertz spectrum of the substance, advantages of an on-chip dual-frequency comb system can be reserved, a terahertz dual-frequency comb is separated, and the defect that the on-chip dual-frequency comb fails to directly measure the terahertz spectrum of the substance is overcome.

Description

technical field [0001] The invention relates to the field of terahertz spectrum analysis, in particular to a terahertz spectrum measurement system and a method for analyzing the terahertz spectrum of substances. Background technique [0002] In the frequency domain, the terahertz spectroscopy measurement system is a broadband coherent light source composed of a series of equally spaced and highly stable frequency lines. The output of the mode-locked laser is a periodic pulse sequence in the time domain. The optical terahertz spectroscopy measurement system with equal frequency spacing in the frequency domain is obtained by leaf transformation. It is precisely because the spectral coverage of the frequency comb is composed of a series of narrow lines, which solves the problem of the traditional harmonic frequency chain system being too complex and bulky and only measuring one frequency. The stable frequency-domain comb characteristics and broadband characteristics of the opt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/3581G01N21/39G01N21/01
CPCG01N21/3581G01N21/39G01N21/01G01N2021/396G01N2021/0112G01N2021/3129H01S5/3402H01S5/4031H01S2302/02H01S5/0623H01S5/02315G01N2201/06113H01S5/042
Inventor 黎华李子平万文坚曹俊诚
Owner SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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