Title :
Tunable Narrow-band Terahertz Generation based on Quasi Phase Matching Structures by Femtosecond Pulses
Author :
Nan Ei Yu ; Kang, Chul ; Jung, Changsoo ; Kee, Chul-Sik ; Lee, Yeung Lak ; Yu, Bong-Ahn ; Ko, Do-Kyeong ; Lee, Jongmin ; Kitamura, Kenji ; Takekawa, Shunji
Author_Institution :
Adv. Photonics Res. Inst., Gwangju Inst. of Sci. & Technol., Gwangju
Abstract :
Terahertz generation was demonstrated around 1~3 THz via difference frequency generation (DFG) using femtosecond pulses in a periodically poled lithium niobate (PPLN) and stoichiometric lithium tantalate (PPSLT) crystals. Two different types of terahertz radiation, forward and backward, could be generated in the quasi-phase matching (QPM) structures by the DFG process. A backward terahertz radiation was measured around 1.3 THz at PPLN and 3 THz at PPSLT. The frequency of terahertz radiation can be controlled by varying the QPM structures.
Keywords :
high-speed optical techniques; lithium compounds; optical frequency conversion; optical phase matching; stoichiometry; submillimetre wave generation; LiNbO3; LiTaO3; backward terahertz radiation; difference frequency generation; femtosecond pulses; forward terahertz radiation; frequency 1 THz to 3 THz; narrowband terahertz generation; periodically poled lithium niobate; quasiphase matching; stoichiometric lithium tantalate crystals; tunable terahertz generation; Biomedical optical imaging; Crystals; Frequency conversion; Narrowband; Nonlinear optics; Optical pulse generation; Optical sensors; Pulse generation; Tunable circuits and devices; Ultrafast optics;
Conference_Titel :
Lasers and Electro-Optics - Pacific Rim, 2007. CLEO/Pacific Rim 2007. Conference on
Conference_Location :
Seoul
Print_ISBN :
978-1-4244-1173-3
Electronic_ISBN :
978-1-4244-1174-0
DOI :
10.1109/CLEOPR.2007.4391312
