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Optical fiber coupling terahertz time-domain spectroscopy testing system

A terahertz time-domain and fiber-optic coupling technology, which is applied in the field of fiber-coupled terahertz time-domain spectroscopy test systems, can solve problems such as high cost, high signal-to-noise ratio, and complex structure, and achieve simple composition, good imaging effect, and easy operation Effect

Inactive Publication Date: 2017-01-11
上海拓领光电科技有限公司
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Problems solved by technology

[0004] The present invention aims at the problems that current terahertz time-domain systems usually have relatively large volume, complex structure, high cost, lack of flexible mobility, and are easily affected by the environment, and proposes a fiber-coupled terahertz time-domain spectrum testing system, which can The test mode can be switched freely, the signal-to-noise ratio is high, and it has the function of terahertz imaging, and the imaging effect is good. It can be widely used in terahertz spectrum testing and imaging in scientific research and industrial fields

Method used

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Embodiment Construction

[0026] Such as figure 1 The schematic diagram of the main components of the fiber-coupled terahertz time-domain spectroscopy test system shown is a femtosecond pulse laser 100, a first mirror 101, a second mirror 102, a third mirror 103, a main fiber coupling system 200, Transmitter transmission fiber 601 , receiver transmission fiber 602 , independent fiber-coupled terahertz transmitter 300 , independent fiber-coupled terahertz receiver 400 , and two-dimensional imaging mobile platform 500 constitute. The laser light emitted by the femtosecond pulse laser 100 is reflected by the three mirrors 101-103 and enters the main fiber coupling system 200. The fiber coupling system 200 divides the laser light into two optical signals, one of which is input to the independent optical fiber through the transmitter transmission optical fiber 601 The coupled terahertz transmitter 300 is used to generate a terahertz signal, and another optical signal is input to the independent fiber-couple...

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Abstract

The invention relates to an optical fiber coupling terahertz time-domain spectroscopy testing system. Lasers emitted by a laser device are reflected by a reflector set to enter a main optical fiber coupling system, the lasers are divided into two paths of light signals through the optical fiber coupling system, one path of light signals is input into an independent optical fiber coupling terahertz emitter through emitter transmission optical fibers for generating terahertz signals, and the other path of light signals is input into an independent optical fiber coupling terahertz receiver through receiver transmission optical fibers for detecting the terahertz signals. The independent optical fiber coupling terahertz emitter and the independent optical fiber coupling terahertz receiver are installed on a two-dimensional imaging movable platform, terahertz emitted by the independent optical fiber coupling terahertz emitter penetrates through a sample or is reflected by the sample to enter the independent optical fiber coupling terahertz receiver, and the sample is tested or imaged. The system can be freely switched between multiple modes according to sample characteristics. The system has the advantages of being rarely limited by space, supporting measuring and imaging of large-size and irregular-size samples, and being good in imaging effect.

Description

technical field [0001] The invention relates to an electromagnetic spectrum test technology, in particular to a fiber-coupled terahertz time-domain spectrum test system. Background technique [0002] Terahertz waves refer to electromagnetic waves with a frequency between 0.1 and 10 THz, which lie between microwaves and infrared rays on the electromagnetic spectrum. Due to the position of the special electromagnetic spectrum where the terahertz wave is located, it has many superior characteristics and can be used in the analysis of special spectral information of material molecules, non-destructive testing and three-dimensional tomography of materials and structures, anti-terrorism inspection of prohibited items, and detection of biological tissues. Research on biopsy, high-precision confidential radar, broadband communication between satellites, etc. The spectral information detected by the terahertz spectrometer can obtain the optical amplitude and phase information of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/3586
CPCG01N21/3586
Inventor 陈向前龙明陆坚金建成陈晓罗坤
Owner 上海拓领光电科技有限公司
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