Highly efficient generation of narrowband terahertz radiation driven by a two-spectral-line laser in PPLN.
Opt Lett
; 47(10): 2374-2377, 2022 May 15.
Article
em En
| MEDLINE
| ID: mdl-35561354
ABSTRACT
We demonstrate record â¼0.9% efficiencies for optical conversion to narrowband (<1% relative bandwidth) terahertz (THz) radiation by strongly cascaded difference frequency generation. These results are achieved using a novel, to the best of our knowledge, laser source, customized for high efficiencies, with two narrow spectral lines of variable separation and pulse duration (≥250â
ps). THz radiation generation in 5% MgO-doped periodically poled lithium niobate (PPLN) crystals of varying poling period was explored at cryogenic and room temperature operation as well as with different crystal lengths. This work addresses an increasing demand for high-field THz radiation pulses which has, up to now, been largely limited by low optical-to-THz radiation conversion efficiencies.
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MEDLINE
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En
Ano de publicação:
2022
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Article