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A dual-wavelength, narrow-linewidth terahertz wave parametric oscillator

A dual-wavelength, narrow-linewidth technology, applied in the field of terahertz wave optoelectronics, can solve the problems of terahertz wave wavelength fine tuning to be further improved, single frequency tuning method, poor mechanical stability, etc., and achieve flexible wavelength tuning method Variety, small size, simple and compact structure

Active Publication Date: 2018-07-03
NORTHWEST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This common flat-flat cavity structure terahertz wave parametric oscillator has a relatively simple frequency tuning method, and generally can only generate a bunch of narrow-band, continuously tunable terahertz waves.
When the wavelength tuning output is realized by rotating the platform on which the resonant cavity is placed, the mechanical stability of the device is also poor, and the fine tuning of the terahertz wave wavelength needs to be further improved

Method used

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  • A dual-wavelength, narrow-linewidth terahertz wave parametric oscillator
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  • A dual-wavelength, narrow-linewidth terahertz wave parametric oscillator

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Embodiment Construction

[0023] see figure 1 , figure 1 It is a schematic diagram of the overall structure of the dual-wavelength, narrow-linewidth terahertz wave parametric oscillator of the present invention. It includes a resonant cavity, which is composed of a rectangular prism 5, a 45° total reflection mirror 6, a double blazed grating 7, a first plane total reflection mirror 8 and a second plane total reflection mirror 9; the resonance cavity is built with MgO:LiNbO 3 The crystal 3 has a silicon prism array device 4 placed on its surface; the pump light enters the resonant cavity and forms an angle of 1.5° with the cavity axis of the resonant cavity; the generated dual-wavelength continuously tunable terahertz wave 10 passes through the silicon prism array device The silicon prism array 4 emits.

[0024] The dual-wavelength, narrow-linewidth terahertz wave parametric oscillator given in this embodiment uses the fundamental frequency light (1064nm) output of the electro-optic Q-switched pulse N...

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Abstract

The invention discloses a terahertz wave parametric oscillator with dual wavelengths, narrow linewidth and high working stability. Its resonant cavity consists of a right-angle prism, a 45° total reflection mirror, a double blazed grating, a first plane total reflection mirror and a third plane total reflection mirror. It is composed of two plane total mirrors; the resonant cavity has a MgO:LiNbO3 crystal built in, and a silicon prism array device is placed on its surface; the pump light enters the resonant cavity and forms an angle of 1.5° with the cavity axis of the resonant cavity. The double blazed grating is a cross-period double blazed grating. One blaze angle corresponds to the highest ‑1 order diffraction efficiency, and the other blaze angle corresponds to the highest ‑2 order diffraction efficiency, and the diffraction efficiencies of the two are approximately equal. By rotating the 45° total reflection mirror, the double blazed grating, the first plane total reflection mirror and the second plane total reflection mirror, any dual-wavelength terahertz wave tunable output can be achieved, and the dual-wavelength output does not affect each other. It can be widely used in terahertz optoelectronic technology fields such as terahertz wave radar, fine spectrum analysis, biomedical imaging, and terahertz communication.

Description

technical field [0001] The invention relates to the technical field of terahertz wave optoelectronics, in particular to a dual-wavelength, narrow-linewidth terahertz wave parametric oscillator. Background technique [0002] Terahertz waves refer to electromagnetic waves with a frequency in the range of 0.1 to 10 THz, and their wave band is between 30 μm and 3 mm, which is in the transition region between millimeter waves and infrared waves, electronics and photonics. Due to the characteristics of high penetration, low energy, high coherence, and fingerprint characteristics, terahertz waves are currently widely used in basic research fields such as biology, physics, chemistry, astronomy, and medical science, as well as biomedical imaging and live detection. , communication radar, national security and anti-terrorism and other applied technology research fields. The development of a terahertz wave radiation source with excellent performance is one of the main key technologies...

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 孙博田方贾静白先鹏
Owner NORTHWEST UNIV
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