Terahertz radiation source based on intracavity optical parameters and difference frequency effect

A terahertz radiation source and optical parameter technology, which is applied in masers, electrical components, circuits, etc., can solve the problems of terahertz wave output energy and low optical conversion efficiency, and achieve improved optical conversion efficiency, simple structure, The effect of improving utilization efficiency

Inactive Publication Date: 2015-01-07
NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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Problems solved by technology

[0004] The purpose of the present invention is to provide a terahertz radiation source based on the optical parameters of the cavity and the difference frequency effect, so as to solve the problems of low terahertz wave output energy and optical conversion efficiency of the current terahertz radiation source

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  • Terahertz radiation source based on intracavity optical parameters and difference frequency effect
  • Terahertz radiation source based on intracavity optical parameters and difference frequency effect
  • Terahertz radiation source based on intracavity optical parameters and difference frequency effect

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Embodiment approach 1

[0024] The technical solution of the present invention is to provide a terahertz radiation source based on the optical parameters of the cavity and the difference frequency effect, such as figure 1 As shown, including the pump light source, the pump light source is composed of plane mirror 1, KD * P crystal 2, polarizer 3, Nd:YAG laser pumping module pumping module 4, plane mirror 14. A harmonic mirror 8 for transmitting pump light and reflecting difference frequency light, a KTP crystal 9, a KTP crystal 10, and a periodically polarized crystal are sequentially arranged on the pump light optical path after the pump module 4 of the Nd:YAG laser pump module. 12. A parabolic mirror 11 and a parabolic mirror 13 are arranged near both ends of the periodically polarized crystal 12 on the optical path of the pump light, and the concave surfaces of the parabolic mirror 11 and the parabolic mirror 13 face the periodically polarized crystal 12 . All the above components are arranged be...

Embodiment approach 2

[0029] Such as figure 2 As shown, a periodically polarized crystal 6 is also arranged between the pump module 4 of the Nd:YAG laser pump module and the harmonic mirror 8, and a parabolic mirror is arranged near the two ends of the periodically polarized crystal 6 on the optical path of the pump light. 5 and the parabolic mirror 7, the concave surfaces of the parabolic mirror 5 and the parabolic mirror 7 face the periodically polarized crystal 6. The configuration of the rest of the terahertz radiation source in this embodiment is the same as that in the first embodiment.

[0030] The 1064nm pump light emitted by the pump light source excites the periodically polarized crystal 6 to generate terahertz waves and first-order Stokes light through optical parametric oscillation. Since the wavelengths of the first-order Stokes light and the pump light are very close, the first-order Stokes light generated from the periodically polarized crystal 6, like the pump light, will oscillat...

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Abstract

The invention relates to a terahertz radiation source based on intracavity optical parameters and a difference frequency effect. The terahertz radiation source comprises a pump light source, a first KTP crystal 9, a second KTP crystal 10 and a periodically poled crystal 12. The pump light source is an optical parametric oscillator composed of the two KTP crystals, two beams of difference frequency light are generated and enter the periodically poled crystal 12, and terahertz waves are generated in a difference frequency light resonant cavity on the basis of the optical difference frequency effect. The two beams of difference frequency light can each serve as pump light to motivate the periodically poled crystal 12, a cascaded optical parameter effect occurs in the difference frequency light resonant cavity, and the terahertz waves are generated. In the whole terahertz wave generation process, the difference frequency light can motivate the periodically poled crystal 12, and the terahertz waves are generated under the cascaded optical parameter effect; one pump photon can generate multiple terahertz photons, and terahertz wave output energy and optical conversion efficiency are effectively improved.

Description

technical field [0001] The invention relates to a terahertz radiation source based on an inner cavity optical parameter and a difference frequency effect, and belongs to the application field of terahertz wave technology. Background technique [0002] Terahertz (Terahertz, referred to as THz, 1THz = 10 12 Hz) waves refer to electromagnetic waves with frequencies in the range of 0.1-10 THz. The frequency range of THz waves is in the transition region from electronics to photonics. In the long-wave direction, it overlaps with millimeter waves; in the short-wave direction, it overlaps with infrared rays. In terms of frequency, THz waves are in the transition zone from macroscopic classical theory to microscopic quantum theory. Due to its special location, THz waves have broad application prospects: (1) THz photons have lower energy, which is 10 times weaker than X-ray photons 7 -10 8 times, it will not cause light damage and photoionization in biological tissues; (2) The vi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S1/00
Inventor 李忠洋吕灵灵周玉谭联刘家豪
Owner NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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