Nested coupling terahertz wave parameter oscillator

A terahertz and wave parametric technology, which is applied in the application field of terahertz wave technology, can solve problems such as low efficiency and low power of terahertz radiation sources, and achieve the effects of reducing output loss, improving utilization efficiency, and increasing optical conversion efficiency

Inactive Publication Date: 2019-01-01
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 nested coupled terahertz wave parametric o

Method used

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  • Nested coupling terahertz wave parameter oscillator
  • Nested coupling terahertz wave parameter oscillator
  • Nested coupling terahertz wave parameter oscillator

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Embodiment Construction

[0030] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0031] Such as figure 1 As shown, a nested coupled terahertz wave parametric oscillator includes a KD*P crystal 1, a polarizer 2, a Nd:YAG laser pump module 3, a GaAs crystal 10, and mirrors arranged around the GaAs crystal 10;

[0032] The pumping source consists of KD*P crystal 1, polarizer 2, Nd:YAG laser pump module 3, first reflector 5, second reflector 6, third reflector 7, fourth reflector 8 and fifth reflector The pump light 4 emitted by the pump source resonates in the resonant cavity composed of the first reflector 5, the second reflector 6, the third reflector 7, the fourth reflector 8 and the fifth reflector 9. Enlarge; the pump source used in this embodiment is Nd:YAG pulsed laser, the wavelength is 1064nm, the pulse width is 20ns, the repetition frequency is 20Hz, the beam diameter is 6mm, and the power density is 10MW / cm 2 .

[0033] The pum...

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Abstract

The invention discloses a nested coupling terahertz wave parameter oscillator. The nested coupling terahertz wave parameter oscillator comprises a KD*P crystal, a polarization plate, a Nd: YAG laser pumping module, a GaAs crystal and reflectors arranged around the GaAs crystal; the pumping source is composed of the KD*P crystal, the polarization plate, the Nd: YAG laser pumping module and a firstreflector, a second reflector, a third reflector, a fourth reflector and a fifth reflector; and the pumping light emitted by the pumping source is resonated and amplified in a resonant cavity definedby the first reflector, the second reflector, the third reflector, the third reflector and the fifth reflector. In the optical parameter process, the Stokes light and the pump light in the cavity canbe recycled, so that the pump light utilization efficiency is effectively improved; and four beams of THz waves are perpendicular to the GaAs crystal to emit, so that no coupling output device is needed, and terahertz wave output loss is effectively reduced.

Description

technical field [0001] The invention belongs to the application field of terahertz wave technology, and in particular relates to a nested coupling 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 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. GaAs crystals have a large second-order nonlinear coefficient, and GaAs crystals have a small absorption coefficient for terahertz waves, so GaAs crystals are used as gain media to generate high-power terahertz waves through optical parametric effects. Contents of the invention [0003] The purpose of the present inventio...

Claims

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Application Information

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IPC IPC(8): G02F1/35G02F1/39H01S1/02
CPCG02F1/35G02F1/39H01S1/02
Inventor 李忠洋陈露露袁胜谭联徐娟李永军袁斌张红涛陈建明
Owner NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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