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Method for measuring pumping electrooptics of Terahertz impulse energy

A technology of terahertz pulse and measurement method, which is applied in the field of pump electro-optical measurement of terahertz pulse energy, can solve problems such as the inability to directly measure energy, and achieve the effect of overcoming the inability to directly measure energy

Active Publication Date: 2010-10-27
中国航天科工集团第二研究院二〇七所
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Problems solved by technology

[0004] The purpose of the present invention is to provide a pumping electro-optic measurement method for terahertz pulse energy, which can effectively measure the energy of terahertz pulses, thereby overcoming the current problem of being unable to directly measure energy due to the lack of terahertz wave direct response components

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  • Method for measuring pumping electrooptics of Terahertz impulse energy
  • Method for measuring pumping electrooptics of Terahertz impulse energy
  • Method for measuring pumping electrooptics of Terahertz impulse energy

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Embodiment Construction

[0030] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0031] In the experiment, the central wavelength of the pump laser is λ 0 =800nm, pulse width 60fs, repetition frequency 10Hz, laser beam diameter 4.5cm, laser pulse energy irradiated on the terahertz photoconductive antenna is 6mJ. The method for measuring terahertz pulse energy by using pump electro-optic detection technology includes the following steps:

[0032] (1) Obtain the detection laser spectrum: adopt such as figure 1 In the single-chirped pulse electro-optic detection scheme shown, by adjusting the positions of the quarter-wave plate 9 and the polarization cube 10, the crystal axis of the quarter-wavelength and the polarization direction of the laser form an included angle of 45 degrees, and pass through the beam splitter 2 After the separated detection beam passes through neutral filter 3, grating 4, off-axis parabolic mirror 5, zinc tell...

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Abstract

The invention belongs to the technical field of electrooptics, in particular to a method for measuring pumping electrooptics of Terahertz impulse energy. The method is characterized by comprising the following steps: firstly, acquiring Terahertz absolute electric field strength; then, collecting Terahertz light spot, and obtaining energy of Terahertz impulse through integral of the Terahertz light spot on certain area and impulse duration. The method solves the problem of energy measurement of Terahertz impulse to overcome the defect that the existing method can not directly measure the energy because of shortage of a direct Terahertz wave response element, provides an effectively technical proposal for Terahertz energy meter designing, and provides a reference calibrating method for high-power Terahertz radiation source study.

Description

technical field [0001] The invention relates to the field of optoelectronic technology, in particular to a pumping electro-optic measurement method for terahertz pulse energy. Background technique [0002] Terahertz spectroscopy and imaging technologies have developed rapidly in recent years. In these technologies, only the relative electric field strength of the terahertz signal needs to be known, so researchers have paid little attention to the measurement of absolute electric field strength for a long time. In addition, so far, there is still a lack of components that directly respond to terahertz pulses in daily life, which is also a factor that makes it impossible to directly measure the absolute electric field strength and energy of terahertz, and it is also an important factor that has hindered the rapid development of terahertz technology for a long time. reason. [0003] However, with the development and application of terahertz technology, people realize that tera...

Claims

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Application Information

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IPC IPC(8): G01J3/28G01R29/00
Inventor 孙金海
Owner 中国航天科工集团第二研究院二〇七所
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