期刊
OPTICS EXPRESS
卷 17, 期 14, 页码 11543-11549出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.17.011543
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- Ministry of Education, Culture, Sports, Science, and Technology (MEXT) of Japan [18GS0208]
We proposed a novel THz generation technique beyond the limitation of the input optical pulse width, based on phase modulation via cascaded chi((2)) process. When intense THz electric field generated by optical rectification lies in electro-optic (EO) crystal, emitted THz field gives phase modulation to the optical excitation pulse. The phase modulation causes excitation pulse narrowing and consequently gives rise to the enhancement of conversion efficiency and THz wave bandwidth broadening. We experimentally realize this generation technique with high chi((2)) EO crystal LiNbO3 and with subpicosecond pulse from Yb-doped fiber laser. It opens new concept of THz technologies.. 2009 Optical Society of America
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