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Tunable Backward THz-Wave Parametric Oscillator Centered at a High Frequency of 0.87 THz
被引:0
作者:
Muldera, Joselito E.
[1
]
Nawata, Kouji
[1
,2
]
Takida, Yuma
[1
]
Yadav, Deepika
[1
]
Minamide, Hiroaki
[1
]
机构:
[1] RIKEN, Ctr Adv Photon, Tera Photon Res Team, 519-1399 Aramaki Aoba, Sendai, Miyagi 9800845, Japan
[2] Tohoku Inst Technol, Dept Informat & Commun Engn, Sendai, Miyagi 9828577, Japan
来源:
2023 48TH INTERNATIONAL CONFERENCE ON INFRARED, MILLIMETER, AND TERAHERTZ WAVES, IRMMW-THZ
|
2023年
关键词:
D O I:
10.1109/IRMMW-THz57677.2023.10299368
中图分类号:
TM [电工技术];
TN [电子技术、通信技术];
学科分类号:
0808 ;
0809 ;
摘要:
We present the first demonstration of a "high frequency" backward THz-wave parametric oscillator designed for a center frequency of 0.87 THz by quasi-collinear phase matching in a slant-stripe-type periodically poled lithium niobate crystal when pumped with sub-nanosecond pulsed source of lambda = 1064.44 nm. Along with the THz wave, an idler wave appears simultaneously with lambda = 1067.75 nm. We also show that the oscillation frequency is tunable by a simple crystal rotation, spanning the range of 0.836 - 0.905 THz based on the change in the spectral line separation between the pump and idler beams. The threshold pump energy for BW-TPO was determined to be 12.4 mJ, equivalent to a pump intensity of 7.24 GW/cm(2) while obtaining a conversion efficiency as high as 8.39% at a pump energy (intensity) of 15.5 mJ (9.05 GW/cm(2)).
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