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A multipolarized periodic terahertz parametric oscillator

A terahertz oscillator technology, applied in the field of multi-polarization periodic terahertz wave parametric oscillators, can solve the problems of low power and low efficiency of terahertz radiation sources, and achieve improved utilization efficiency, reduced output loss, and optical conversion The effect of increased efficiency

Inactive Publication Date: 2019-01-11
NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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Problems solved by technology

[0003] The purpose of the present invention is to provide a multi-polarization periodic 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 multipolarized periodic terahertz parametric oscillator
  • A multipolarized periodic terahertz parametric oscillator
  • A multipolarized periodic terahertz parametric oscillator

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Embodiment Construction

[0024] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0025] Such as figure 1 Shown is a structural principle diagram of an embodiment of a multi-polarization periodic terahertz wave parametric oscillator of the present invention. It can be seen from the figure that the terahertz radiation source includes: reflectors 1 and 5 , KD*P crystal 2 , polarizer 3 , laser pumping module 4 , and multi-polarization period PPLN crystal 6 .

[0026] The pump source is composed of reflectors 1, 5, KD*P crystal 2, polarizer 3, and laser pump module 4. The pump light 7 emitted by the pump source is resonantly amplified in the resonant cavity composed of reflectors 1 and 5. . The pump source used in this embodiment is a Nd:YAG quasi-continuous laser with a wavelength of 1064 nm, a pulse width of 30 ns, a repetition rate of 20 KHz, a beam diameter of 1 mm, and a power density of 100 MW / cm2.

[0027] The X-axis is parallel to t...

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Abstract

A multipolarized periodic terahertz wave parametric oscillator includes a pump source, a multipolarized periodic PPLN crystal, and a first parabolic mirror and a second parabolic mirror arranged on both sides of the multipolarized periodic PPLN crystal. Stokes (Stokes) light and terahertz (THz) waves are generated by optical parametric effect in PPLN crystals pumped by reciprocating pump (pump) light. The generated Stokes light oscillates back and forth in the ring resonator and amplifies the THz wave through the optical parametric effect. The generated THz wave emits perpendicularly to the surface of PPLN crystal. In the process of optical parameters, Stokes light and pump light can be recycled to improve the utilization efficiency of pump light. The generated THz wave is emitted perpendicular to the surface of PPLN crystal, and no coupling device is needed to reduce the THz wave output loss.

Description

technical field [0001] The invention relates to a multi-polarization period terahertz wave parametric oscillator, belonging to the field of terahertz wave technology application. Background technique [0002] Terahertz (THz) waves refer to electromagnetic waves with frequencies in the range of 0.1-10 THz (1 THz=1012 Hz), which are located between millimeter waves and infrared waves. Terahertz waves have broad application prospects in spectral detection, imaging, remote sensing, communications, biomedicine, and military affairs. So far, there is still a lack of terahertz radiation sources with high power, high efficiency, coherence, tunability, miniaturization, and room temperature operation. The PPLN crystal has a large second-order nonlinear coefficient, and the absorption coefficient of the PPLN crystal to the terahertz wave is small, so the PPLN crystal is used as the gain medium, and the high-power terahertz wave can be generated through the optical parametric effect. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S1/02
CPCH01S1/02
Inventor 邴丕彬王花张红涛谭联李忠洋李永军袁斌袁胜邓荣鑫陈建明
Owner NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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