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Photonic crystal fiber THz laser device

A photonic crystal fiber and laser technology, applied in the field of terahertz lasers, to achieve the effects of reduced transmission loss, low transmission loss, and a good foundation for technological transformation

Active Publication Date: 2015-06-10
TIANJIN UNIV
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  • Photonic crystal fiber THz laser device
  • Photonic crystal fiber THz laser device
  • Photonic crystal fiber THz laser device

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[0021] The present invention uses a photonic crystal fiber with a large core diameter as a gas pool for the interaction between carbon dioxide (CO2) laser and methanol (CH3OH) vapor, which greatly reduces the volume of the THz source, increases the intensity of the interaction between CO2 laser and CH3OH gas, and simultaneously designs Large-core photonic crystal fibers can reduce the transmission loss of CO2 lasers, improve the conversion efficiency of lasers, and provide a new way to realize THz lasers with high beam quality, low transmission loss, reliability, stability and small size.

[0022] The new photonic crystal fiber THz laser proposed by the present invention mainly adopts a large-diameter hollow-core photonic crystal fiber as a THz wave generation tube, reduces the transmission loss of CO2 laser, enhances the intensity of interaction between CO2 laser and CH3OH gas, and improves the conversion of THz Efficiency, to achieve a reliable and stable THz laser with small...

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Abstract

The invention relates to the technical field of a terahertz laser device. In order to lessen the volume of the THz laser device and enhance the conversion efficiency of the THz laser device, the invention discloses a novel THz laser device with high optical quality, low transmission loss, reliability, steadiness and small volume. For the purpose, the technical scheme of the photonic crystal fiber THz laser device is that infrared waves outputted by the laser device are converged to the fiber core of the big-core photonic crystal fiber II through a zinc selenide converging lens, a barium fluoride sealing cap, and a big-core bare fiber adapter I; the output end of the big-core photonic crystal fiber II sequentially passes through a big-core bare fiber adapter II and a bare fiber adapter bushing, and then connects with the big-core bare fiber adapter II and the big-core photonic crystal fiber I; except for the laser device and the zinc selenide converging lens, said components are arranged in an air chamber. The laser device is mainly applied to design and manufacturing of the THz laser device.

Description

technical field [0001] The invention relates to the technical field of terahertz lasers, in particular to a novel photonic crystal fiber THz laser. Background technique [0002] THz lasers emit electromagnetic waves with a wavelength between 30 μm and 3 mm, which is an electromagnetic radiation area between millimeter waves and infrared light waves. THz waves have lower photon energy and can penetrate tissues and organs like X-rays without causing damage to tissues. Due to the relatively strong absorption of water molecules to THz, it can be used to separate organic tissues from regions of changing water composition, thus being widely used in medical diagnosis. In addition, many biomacromolecules, such as amino acids, explosives and drugs, will have strong absorption and resonance on the corresponding THz waves, making THz spectroscopy widely used in the analysis and research of physical and chemical properties of biomacromolecules, security supervision, anti-drug anti-terr...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/034
Inventor 史伟张海伟姚建铨
Owner TIANJIN UNIV
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