Terahertz-Wave Parametric Sources

Hayashi, Shinichiro; Kawase, Kodo

doi:10.5772/6909

Cited by 3 publications

(2 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In order to explore the mechanism of THz output enhancement with pump recycling technique, the principle of TPO is explained in a different way here. As we know, the THz generation in TPO involves the second-order and third-order nonlinear processes [17]. On one hand, the Stokes and THz waves are initially generated from the stimulated polariton scattering (SPS) under the condition of noncollinear phase-matching, which occurs above the threshold.…”

Section: Resultsmentioning

confidence: 99%

Efficient Ring-Cavity Terahertz Parametric Oscillator With Pump Recycling Technique

Tang

Wang

et al. 2019

IEEE Photonics J.

View full text Add to dashboard Cite

The energy scaling of THz wave in wide range based on surface-emitted (SE) ringcavity terahertz parametric oscillator (TPO) with pump recycling technique is demonstrated in this paper. The continuously tunable range from 1.24 to 3.77 THz was achieved with full pump beam recycling, whereas the tunable range was 1.24-2.72 THz without pump beam recycling. The terahertz output energy and conversion efficiency increased more than seven times throughout the whole tuning range. The maximum enhancement ratio of the terahertz output energy was 12.8 times at 2.72 THz. Additionally, under the same experimental conditions, THz conversion efficiency was increased from 7.77 × 10 −6 to 7.85 × 10 −5 and the threshold energy was significantly reduced by 41% at 1.63 THz. Moreover, through the theoretical analysis, the enhancement mechanism of TPO by pump recycling was verified to originate from the threshold reduction of the stimulated polariton scattering (SPS) process and the interaction improvement between the pump and Stokes waves in the difference frequency generation (DFG) process.

show abstract

Section: Resultsmentioning

confidence: 99%

Efficient Ring-Cavity Terahertz Parametric Oscillator With Pump Recycling Technique

Tang

Wang

et al. 2019

IEEE Photonics J.

View full text Add to dashboard Cite

show abstract

“…Terahertz (THz, 1THz=10 12 Hz) waves are the electromagnetic radiation whose frequency ranges (about 0.1~10THz) from millimeter waves to the far infrared [1] . The THz frequency range lies in the middle of the electromagnetic spectrum, between the microwaves and visible light.…”

Section: Introductionmentioning

confidence: 99%

Numerical study on terahertz-source-based on difference generation intro OPO cavity

Yang

2011

SPIE Proceedings

View full text Add to dashboard Cite

We numerically studied the terahertz wave generation in quasi phase matched Gallium Arsenide (QPM-GaAs) based on difference frequency generation (DFG) process between resonating signal and idler waves of the type-Ⅱphase matched periodically poled LiNbO 3 (PPLN) optical parametric oscillator (OPO). The optimal GaAs length for maximum conversion efficiency was obtained considering the wave propagation loss in the GaAs crystal by adding a loss term in the coupled wave equations. THz source, optical parametric oscillation(OPO), difference frequency generation(DFG).

show abstract