A Ring Cavity Terahertz Wave Parametric Oscillator

A terahertz and annular cavity technology, applied in the application field of terahertz wave technology, can solve the problems of low efficiency and low power of terahertz radiation source, and achieve the effects of reducing output loss, improving utilization efficiency, and increasing optical conversion efficiency

Inactive Publication Date: 2020-12-01
NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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Problems solved by technology

[0009] The purpose of the present invention is to provide a ring cavity terahertz wave parametric oscillator to solve the problems of low power and low efficiency of existing terahertz radiation sources

Method used

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  • A Ring Cavity Terahertz Wave Parametric Oscillator
  • A Ring Cavity Terahertz Wave Parametric Oscillator
  • A Ring Cavity Terahertz Wave Parametric Oscillator

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Embodiment Construction

[0029] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0030] Such as figure 1 As shown, a ring cavity terahertz wave parametric oscillator includes a pump source, a GaP crystal 7 and mirrors arranged around the GaP crystal 7, and the pump source is provided by KD * P crystal 1, polarizer 2, Nd:YAG laser pump module 3, first reflector 5 and second reflector 6 are formed; The resonant cavity inside the resonant cavity composed of mirror 6 is amplified. The pump source used in this embodiment is a Nd:YAG pulsed laser with a wavelength of 1064 nm, a pulse width of 10 ns, a repetition rate of 10 Hz, a beam diameter of 5 mm, and a power density of 20 MW / cm 2 .

[0031] The back-and-forth oscillating pump light 4 is incident on the GaP crystal 7, and four beams of Stokes light and four beams of terahertz waves are generated by the optical parametric effect. The four beams of Stokes light are respectively the first S...

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Abstract

The invention discloses a ring cavity terahertz wave parametric oscillator, which comprises a pump source, a GaP crystal and reflecting mirrors arranged around the GaP crystal, wherein the pump sourceis composed of a KD*P crystal, a polarizer, an Nd:YAG laser pumping module, a first reflecting mirror and a second reflecting mirror; and the pump light oscillating back and forth shoots into the GaPcrystal and generates four beams of Stokes light and four beams of terahertz waves through an optical parametric effect, the four beams of Stokes light are respectively first Stokes light, second Stokes light, third Stokes light and fourth Stokes light, and the four beams of terahertz waves are respectively first terahertz beams, second terahertz beams, third terahertz beams and fourth terahertzbeams. In the optical parametric process, the Stokes light and the pump light in the cavity can be recycled, and thus the utilization efficiency of the pump light is effectively improved.

Description

technical field [0001] The invention belongs to the application field of terahertz wave technology, and in particular relates to a ring cavity terahertz wave parametric oscillator. Background technique [0002] Terahertz (THz) wave refers to the frequency between 0.1-10THz (1THz=10 12 Hz) range, between millimeter waves and infrared waves. Terahertz waves are different from millimeter waves and infrared waves and have many unique properties: [0003] (1) Subbands and microbands, rotational and vibrational transition energies of a large number of organic molecules and semiconductors are all in the THz range. The spectral resolution characteristics of THz waves make THz detection technology, especially THz spectral imaging technology, in addition to distinguishing the morphology of substances In addition, it can also identify the composition of substances. [0004] (2) From the perspective of its spectrum and imaging through different materials, THz radiation can penetrate ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S1/02G02F1/35
CPCG02F1/35H01S1/02
Inventor 李忠洋李君曹永梅袁斌李永军谭联袁胜邴丕彬邓荣鑫
Owner NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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