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Optical delay line device and terahertz time-domain spectroscopy system

An optical delay line and terahertz time-domain technology, which is applied in the field of optical delay line devices and terahertz time-domain spectroscopy systems, can solve problems such as inability to perform fast scanning, achieve fast terahertz spectroscopy and imaging, expand application range, and reduce costs low effect

Inactive Publication Date: 2014-02-12
SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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  • Abstract
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Problems solved by technology

[0004] Based on this, it is necessary to provide an optical delay line device capable of fast scanning for the above-mentioned problem that fast scanning cannot be performed

Method used

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  • Optical delay line device and terahertz time-domain spectroscopy system

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Embodiment Construction

[0018] figure 1 is a schematic structural diagram of a terahertz time-domain spectroscopy system in an embodiment. The terahertz time-domain spectroscopy system includes a beam splitter 100 , an emitter 200 , a parabolic mirror group 300 , a detector 400 and an optical delay line device 500 arranged on an optical path.

[0019] In this embodiment, both the emitter 100 and the detector 400 are provided with photoconductive antennas. The material used for the photoconductive antenna medium is LT-GaAs (Low temperature grown GaAs) crystal.

[0020] The parabolic mirror group 300 is an off-axis parabolic mirror group, including a plurality of off-axis parabolic mirrors. Further, the parabolic mirror group 300 includes a first parabolic mirror 310 , a second parabolic mirror 320 , a third parabolic mirror 330 and a fourth parabolic mirror 340 arranged in sequence along the optical path.

[0021] The optical delay line device 500 includes a mirror group 510 , a mirror base (not sh...

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Abstract

The invention relates to an optical delay line device and a terahertz time-domain spectroscopy system. The optical delay line device comprises a reflector set, a reflector base and a voice coil motor platform, wherein the reflector set is installed on the reflector base, and is used for scanning the delay of terahertz light, the reflector base is fixed to the voice coil motor platform, and the voice coil motor platform drives the reflector set to carry out linear reciprocating movement to carry out scanning. Due to the fact that the voice coil motor platform is used for driving the reflector set to scan the time delay of terahertz pulses, the defects that due to the fact that an electric horizontal-movement platform is limited by mechanical inertia, the electric horizontal-movement platform is low in transmission response speed, and the transmission response of the electric horizontal-movement platform is hysteretic are overcome, the different delay of the terahertz pulses can be scanned, the detection time of the terahertz pulses can be greatly shortened, a terahertz spectrum can be rapidly implemented, terahertz imaging can be rapidly achieved, the cost is low, operation is convenient, integration is easy, a time window is large, and the range of application of the terahertz time-domain spectroscopy system is greatly expanded.

Description

technical field [0001] The invention relates to an optical system, in particular to an optical delay line device and a terahertz time-domain spectroscopy system. Background technique [0002] Terahertz wave refers to coherent electromagnetic radiation with a frequency in the far-infrared band of 0.1THz--10THz. It is in a special position in the electromagnetic spectrum in the transition from electronics to photonics, so it has unique properties such as perspective, safety, and spectral resolution. It has very important academic value and application prospect. With the development of terahertz technology, terahertz spectroscopy and imaging have shown great application potential in many fields such as biology, medical disease diagnosis, material science, military and basic chemical research, and have quickly become a cutting-edge research direction that attracts attention. . Terahertz time domain spectroscopy (THz-TDS) technology is one of the application technologies of ter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J3/06G01J3/28G02B17/08
Inventor 鲁远甫刘文权冯广智
Owner SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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