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Photonic crystal fiber, THz wave parametric oscillation generating system and method

A technology of photonic crystal fiber and optical parametric oscillator, which is applied in the field of optical terahertz radiation, can solve the problems of low THz wave radiation power, complex equipment structure, and poor stability, and achieve low cost, low dispersion, and stable performance.

Inactive Publication Date: 2012-07-04
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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Problems solved by technology

[0007] In order to solve the technical problems of poor beam quality, low power, low efficiency, and inability to operate at room temperature in existing methods for optically generating THz waves, the present invention provides a THz wave parametric oscillation generation method based on an octagonal photonic crystal fiber and its device to solve the existing technical problems of low radiation power of photogenerated THz waves, complex equipment structure, high cost and poor stability

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  • Photonic crystal fiber, THz wave parametric oscillation generating system and method
  • Photonic crystal fiber, THz wave parametric oscillation generating system and method
  • Photonic crystal fiber, THz wave parametric oscillation generating system and method

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Embodiment Construction

[0030] The invention is a picosecond THz wave parametric oscillator and its device based on octagonal photonic crystal fiber. The pump light and the signal light undergo four-wave mixing in the photonic crystal fiber to generate radiation output in the THz frequency band. The signal light satisfying the condition of collinear phase matching oscillates in the parametric oscillator.

[0031] The pump source is a picosecond level pump source.

[0032] The four-wave mixing in the octagonal photonic crystal fiber is a degenerate four-wave mixing process. The pump photon transfers energy to the signal photon while the remaining energy is radiated as an idler photon. The idler light here is the THz wave that needs to be output.

[0033] It is advisable to set a 45° total reflection mirror between the erbium-doped fiber amplifier EDFA and the lens L1.

[0034] Between the collimating lens L1 and the plane mirror M, silver mirrors M2 and M3, which reflect the pumping light to M, are p...

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Abstract

The invention discloses a photonic crystal fiber, a THz wave parametric oscillation generating system and a THz wave parametric oscillation generating method. The photonic crystal fiber comprises an outer cladding, an inner cladding arranged in the outer cladding, an interlayer arranged in the inner cladding and a fiber core arranged in the interlayer, wherein the inner cladding comprises a plurality of polytetrafluoroethylene tubes uniformly distributed on the circumference, the interlayer is a polyethylene tube, and the fiber core has an octagonal structure. The technical problems of poor beam quality, low power, low efficiency and incapability of realizing operation at room temperature in the conventional method for optically generating THz wave are solved; and the THz wave parametric oscillation generating method and the THz wave parametric oscillation generating device based on the octagonal photonic crystal fiber solve the technical problems of low radiant power, complex equipment structure, high cost and poor stability in conventional photo-produced THz wave.

Description

technical field [0001] The invention belongs to optical terahertz radiation technology, in particular to a picosecond terahertz wave parametric oscillation generation method and device thereof based on an octagonal photonic crystal fiber. Background technique [0002] Terahertz (THz) radiation usually refers to electromagnetic waves from 0.1 to 10 THz, and its wave band is between microwave and far infrared. On the electromagnetic spectrum, the infrared and microwave radiation technologies on both sides of the THz band are very mature, but the THz technology is not commensurate with these mature technologies on the adjacent bands. From the history of THz radiation research, early people's interest in THz radiation research is mainly due to the strong absorption of THz waves by the atmosphere, so THz spectroscopy is mainly used by chemists and astronomers to study the rotation and vibration of some simple molecules Spectral properties and thermal emission lines. These early...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/036G02F1/35G02F1/39
Inventor 刘红军武辉辉黄楠孙启兵
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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