Device and method for rapidly detecting terahertz output frequency instability of carcinotron

A technology of output frequency and instability, applied in the field of terahertz frequency measurement, to achieve the effect of improving accuracy, avoiding noise and fast response speed

Active Publication Date: 2018-02-23
UNIV OF SHANGHAI FOR SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

So far, there is no easy way to measure the instability of the return wave tube. Even though there are a few terahertz detectors that can observe the instability of the source, there is no way to calibrate its instability.

Method used

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  • Device and method for rapidly detecting terahertz output frequency instability of carcinotron
  • Device and method for rapidly detecting terahertz output frequency instability of carcinotron
  • Device and method for rapidly detecting terahertz output frequency instability of carcinotron

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Embodiment

[0068] figure 2 It is a schematic diagram of eight segments of one cycle of the intercepting oscilloscope in the embodiment of the present invention

[0069] Such as figure 2 As shown, the position of the detector 4 is moved back and forth, and it is observed on the oscilloscope 5 that the amplitude and shape of the signal change periodically, and after multiple sets of data research, the period of the signal change is about half a wavelength. Among them, after observation, the signal oscillation amplitude is the smallest at the strongest and weakest signal, so this position is used as the characteristic position for calculation.

[0070] image 3 is a schematic diagram of Fabry-Perot multi-beam interference in an embodiment of the present invention, Figure 4 It is two simulation fragment diagrams when the wavelength change rate in the embodiment of the present invention is zero and larger.

[0071] Such as image 3 with Figure 4 As shown, the formula is derived as f...

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Abstract

The invention discloses a device and a method for rapidly detecting the terahertz output frequency instability of a carcinotron. The device is used for detecting the output frequency of the carcinotron which is provided with a light-reflecting diffuse reflection body fixed at the tail end, and comprises a visible laser device for emitting laser, so that the laser reaches the light-reflecting diffuse reflection body, an off-axis paraboloid mirror which is arranged on the same horizontal line of the light-reflecting diffuse reflection body for collecting and collimating scattered light formed byreflecting laser of the light-reflecting diffuse reflection body to obtain parallel light beams, a detector which is arranged behind the off-axis paraboloid mirror, detects the parallel light beams and converts the optical signals of the parallel light beams into electric signals, an oscilloscope electrically connected with the detector and used for guiding out the electric signals detected by the detector so as to obtain the position of the signal amplitude; and a three-dimensional manual platform for bearing the detector and adjusting the three-dimensional space position of the detector.

Description

technical field [0001] The invention relates to the field of terahertz frequency measurement, in particular to a device and method for quickly detecting the instability of the terahertz output frequency of a return wave tube. Background technique [0002] Terahertz refers to electromagnetic waves with a frequency between 0.1 and 10 THz, which is located between microwave and infrared in the electromagnetic spectrum. Since terahertz is located in a special electromagnetic wave band, it has many unique and superior properties, and has very strong complementary characteristics with electromagnetic waves in other wave bands in terms of application. With the continuous development and innovation of terahertz radiation source and detection technology, the application fields of terahertz technology are expanding, such as in material detection, security imaging, biomedicine, product quality inspection, environmental monitoring, space communication and astronomy and other fields wil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J3/45
CPCG01J3/45
Inventor 舒天娇郭旭光游冠军朱亦鸣
Owner UNIV OF SHANGHAI FOR SCI & TECH
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