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Overmoded high power pulse terahertz power detector

A power detector and high-power technology, applied in the field of detectors, can solve the problem that the maximum operating frequency is only 0.17, and achieve the effects of reduced processing integration difficulty, short response time, and fast response speed.

Inactive Publication Date: 2013-11-20
NORTHWEST INST OF NUCLEAR TECH
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  • Description
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AI Technical Summary

Problems solved by technology

So far, the highest operating frequency of this type of detector has only reached 0.17THz

Method used

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  • Overmoded high power pulse terahertz power detector
  • Overmoded high power pulse terahertz power detector
  • Overmoded high power pulse terahertz power detector

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Embodiment Construction

[0029] 1. Receiving waveguide:

[0030] express opinion figure 1 , select a standard rectangular waveguide with an inner cross-section of 0.7112mm×0.3556mm and a length of 25.4mm. The theoretical cutoff frequency of the waveguide is 0.211THz, which is used for terahertz wave transmission in the 0.26-0.4THz frequency band.

[0031] 2. Overmode waveguide:

[0032] express opinion figure 1 , select a standard rectangular waveguide with an inner cross-section of 2.032mm×1.016mm and a length of 25.4mm. The advantage of the overmode waveguide is that the cross section is larger, which not only makes it less restrictive to the detection chip, but also makes it less difficult to integrate the detector.

[0033] 3. Transition waveguide:

[0034] express opinion figure 1 , using a linear gradient transition form: the inner cross-section of one end is 0.7112mm×0.3556mm, which is connected to the receiving waveguide; the inner cross-section of the other end is 2.032mm×1.016mm, and t...

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Abstract

The invention discloses an overmoded high power pulse detector. A hot carrier effect of a strong electric field in a semiconductor is taken as a basic working principle, and measurement is realized according to resistance variation of the semiconductor. The detector comprises a WR2.8 standard waveguide with a smaller outlet surface, a WR2.8-WR8.0 transition waveguide with an outlet surface changing from small to large, a WR8.0 standard waveguide with a relatively larger outlet surface, a semiconductor detection chip and a matching load at the rear end. The peak power which can bear a pulse can reach 100 W, the response speed is smaller than 1 ns, and the difficulty in detection chip processing and detector integration is relatively smaller. The detector is suitable for high power pulse measurement in a frequency range of 0.3-0.4 THz.

Description

technical field [0001] The invention belongs to the design scheme of a power measuring device, and in particular relates to a power measuring device for a frequency of 0.3-0.4THz (terahertz, Terahertz, 1THz=10 12 Hz) range of high-power pulses for power measurement detectors. Background technique [0002] Radiation power is one of the main parameters of terahertz radiation sources, especially high-power pulsed sources. It directly determines the application range of the source and promotes the development of the source. Key and difficult points of the field. As an important part of the terahertz frequency band, the 0.3-0.4THz frequency band has become one of the hotspots in the current international research and application of terahertz technology because it contains several important atmospheric transmission windows (such as 0.34THz and 0.38THz). The research on power pulse measurement has important practical significance for the development of terahertz technology. So f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J1/42
Inventor 王雪锋王光强王建国朱湘琴李爽
Owner NORTHWEST INST OF NUCLEAR TECH
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