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Terahertz time domain spectral radiation and detecting device

A technology of terahertz time-domain and spectral radiation, which is applied in the field of terahertz time-domain spectral radiation and detection devices, and can solve problems such as limiting the highest pulse energy

Inactive Publication Date: 2016-07-06
CHINA COMM TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the traditional solid fiber technology must use a grating or a pair of prisms for dispersion compensation due to dispersion problems; secondly, due to self-phase modulation, pulse broadening limits the highest pulse energy used in terahertz radiation devices and detection devices

Method used

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  • Terahertz time domain spectral radiation and detecting device
  • Terahertz time domain spectral radiation and detecting device

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Embodiment Construction

[0023] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the associated drawings. Preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention. As used herein, the term "and / or" includes any and all combinations of one or more of ...

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Abstract

The invention relates to a terahertz time domain spectral radiation and detecting device. In the terahertz time domain spectral radiation and detecting device, femto second laser which is emitted from a femto second laser device is divided into pump light and probe light. Furthermore the pump light and the probe light are transmitted in a hollow photonic crystal fiber. In the terahertz time domain spectral radiation and detecting device, through reasonably selecting central wavelength of a pulse which is output from the femto second laser device, a two-order fiber dispersion which is generated in transmission of a laser pulse in the hollow photonic crystal fiber is a negative value, and the two-order fiber dispersion is neutralized with a positive dispersion which is generated by an optical isolator, a beam splitter, etc. The terahertz time domain spectral radiation and detecting device prevents inconvenience and cost of grating or a pair of prisms for compensating the dispersion. Secondly, because the pulse is basically transmitted in the hollow photonic crystal fiber, the energy of the pulse with pulse width of dozens of femto seconds can reach several hundreds of nanojoules. Furthermore pulse width increase because of self phase modulation is prevented. A high-energy laser pulse is supplied for a terahertz radiation device and a detecting device.

Description

technical field [0001] The invention relates to the field of terahertz technology, in particular to a terahertz time-domain spectral radiation and detection device. Background technique [0002] Terahertz (THz, 1THz=10 12 Hz) frequency band refers to the range of electromagnetic radiation with a frequency from 0.1 THz to 10 THz and a wavelength between microwave and infrared light. Due to its short time scale, terahertz radiation can provide the ability of ultrafast time-resolved spectroscopy. It can be used to penetrate some materials such as organisms, dielectric materials, and gas phase substances. It can be obtained by analyzing the transflective terahertz signal of the sample material. Information about the composition of the material, as well as its physical, chemical, biological state, etc. Also because of the wide frequency band of terahertz wave and the small photon energy, it will not cause damage to the detection material, so terahertz technology can be applied ...

Claims

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Application Information

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IPC IPC(8): G01J3/28G01J3/02
CPCG01J3/28G01J3/0218
Inventor 潘奕彭世昌丁庆李辰
Owner CHINA COMM TECH CO LTD
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