Title :
Cherenkov phase-matched terahertz wave generation using ridge-type waveguide
Author :
Takeya, K. ; Shuzhen, F. ; Takeuchi, H. ; Kajiki, K. ; Ouchi, Takayuki ; Kawase, Kanta
Author_Institution :
Dept. of Electr. Eng., Nagoya Univ., Nagoya, Japan
fDate :
June 30 2013-July 4 2013
Abstract :
We present efficient terahertz (THz)-wave generation from waveguide propagation using Cherenkov-type radiation with non-linear optical (NLO) crystal. This approach presented the following advantages: 1) many crystals can be used as THz-wave emitters; 2) It is not necessary to satisfy the phase matching condition inside crystal. and 3) THz wave generation is not suppressed by the absorption in the crystal. We demonstrated THz generation using a ridge-type LiNbO3 waveguide with a thickness of 3.8 μm. We obtained THz-wave generation with an ideal temporal half-cycle pulse and a wide tuning range, which is applied to reflection tomography imaging.
Keywords :
Cherenkov radiation; lithium compounds; microwave photonics; optical phase matching; optical tuning; optical waveguides; ridge waveguides; terahertz wave generation; terahertz wave spectra; Cherenkov phase-matched terahertz wave generation; Cherenkov-type radiation; LiNbO3; NLO crystal; THz absorption; THz-wave emitters; THz-wave generation; nonlinear optical crystal; phase matching; reflection tomography imaging; ridge-type waveguide; size 3.8 mum; temporal half-cycle pulse; waveguide propagation; Crystals; Lithium niobate; Nonlinear optics; Optical imaging; Optical reflection; Optical waveguides; Ultrafast optics;
Conference_Titel :
Lasers and Electro-Optics Pacific Rim (CLEO-PR), 2013 Conference on
Conference_Location :
Kyoto
DOI :
10.1109/CLEOPR.2013.6600534
