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A photon mixing terahertz wave detection device

A terahertz detection and detection device technology, applied in the field of terahertz wave detection, can solve the problems of laser power drift accumulation, extra time consumption, impractical compensation methods, etc., and achieve a high signal-to-noise ratio effect

Active Publication Date: 2021-03-19
CHINA JILIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the extra time required for two measurements in the spectrum test, and errors such as laser power drift will also accumulate, this compensation method is not practical

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  • A photon mixing terahertz wave detection device
  • A photon mixing terahertz wave detection device
  • A photon mixing terahertz wave detection device

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Embodiment Construction

[0024] The specific implementation manner of the present invention will be described below in conjunction with the accompanying drawings.

[0025] The photon mixing terahertz wave detection device includes a first laser 11, a second laser 12, a first laser beam splitter 21, a second laser beam splitter 22, a laser phase modulator 3, a first laser beam combiner 41, a Two laser beam combiners 42 , a first photoconductive terahertz detection antenna 51 , a second photoconductive terahertz detection antenna 52 , a terahertz beam splitter 6 and a signal processing module 7 .

[0026] The first laser 11 is a continuous output linearly polarized semiconductor laser with an output wavelength of 1550.03 nm and an output power of 50 mW. The second laser 12 is a continuous output linearly polarized semiconductor laser with adjustable output laser frequency, the output wavelength is 1520-1630 nm, and the output power is 50 mW. Both the output ends of the first laser 11 and the second las...

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Abstract

The invention discloses a photon frequency mixing terahertz detection device. The device comprises two lasers, two laser beam splitters, two laser beam combiners, two terahertz photoconductive detection antennas, a laser phase modulator, a terahertz beam splitter and a signal processing module. The photon frequency mixing terahertz detection device can solve the problem that a detection signal ina terahertz photon frequency mixing system is influenced by a terahertz wave phase, and outputs a terahertz wave amplitude signal irrelevant to the phase. The photon frequency mixing terahertz detection device can be used for application scenes with strict requirements on detection time, such as spectral scanning, real-time imaging and the like.

Description

technical field [0001] The invention belongs to the field of detection of terahertz waves, in particular to a terahertz detection device based on photon mixing. Background technique [0002] In the field of terahertz waves, terahertz wave detection devices can be divided into thermal effect detectors and electric field effect detectors. Pyroelectric detectors, Golay Cell and other thermal effect-based detectors generally have shortcomings such as large size and slow response speed, which are not suitable for fast detection. There are many different types of terahertz electric field effect detectors, such as electro-optical sampling detectors, photoconductive antenna detectors, and heterodyne detectors. Among them, the electro-optical sampling detectors and photoconductive antenna detectors based on femtosecond pulse sampling can only be used in terahertz time-domain spectrometers. The heterodyne detector represented by the Schottky device is small in size and fast in respo...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01J3/433G01J3/02
CPCG01J3/0216G01J3/433G01J2003/4332
Inventor 刘建军洪治陈玲玲吴霞
Owner CHINA JILIANG UNIV