Numerical Modeling of an Injection-Seeded Terahertz-Wave Parametric Generator

We have constructed a numerical model for injection-seeded terahertz-wave parametric generators in which the pump depletion, the duration of the pump pulse, as well as the spatial modes of the pump and seed beams are taken into consideration. Compared with other models which only provide the paramet...

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Bibliographic Details
Published in:Journal of infrared, millimeter and terahertz waves millimeter and terahertz waves, 2020-03, Vol.41 (3), p.276-290
Main Authors: Qin, Yu, Li, Zeyu, Yan, Qiang, Zhou, Xun, Zou, Mingrui, Kong, Weipeng
Format: Article
Language:English
Subjects:
Classical Electrodynamics
Depletion
Electrical Engineering
Electronics and Microelectronics
Engineering
Instrumentation
Lithium niobates
Mathematical models
Numerical models
Symmetry
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Summary:We have constructed a numerical model for injection-seeded terahertz-wave parametric generators in which the pump depletion, the duration of the pump pulse, as well as the spatial modes of the pump and seed beams are taken into consideration. Compared with other models which only provide the parametric gain under the assumption of low pump depletion, our model can make the predictions on the energy as well as spatial and temporal profiles of the generated terahertz-wave. Besides, the appropriate value of nonlinear coefficient of MgO:LiNbO 3 in terahertz regime is difficult to find in the published works. To solve this problem, Miller’s rule is applied for the wavelength scaling of the nonlinear coefficient during calculation. We present a detailed description of the model and show that its predictions agree well with the reported experimental results. The presented model allows the performance to be estimated when designing an injection-seeded terahertz-wave parametric generator.
ISSN:1866-6892
1866-6906
DOI:10.1007/s10762-019-00662-5