Generation of narrowband tunable THz-radiation via optical rectification of fs-pulses in periodically poled nonlinear materials

2003 ◽  
Author(s):  
C. Weiss ◽  
G. Torosyan ◽  
R. Wallenstein ◽  
R. Beigang ◽  
Y. Avetisyan
Keyword(s):  
Optical Rectification ◽  
Thz Radiation ◽  
Periodically Poled ◽  
Nonlinear Materials

scholarly journals Tuning characteristics of narrowband THz radiation generated via optical rectification in periodically poled lithium niobate

2001 ◽  
Vol 8 (9) ◽  
pp. 497 ◽  
Author(s):  
C. Weiss ◽  
G. Torosyan ◽  
J.-P. Meyn ◽  
R. Wallenstein ◽  
R. Beigang ◽  
...  
Keyword(s):  
Lithium Niobate ◽  
Optical Rectification ◽  
Thz Radiation ◽  
Periodically Poled ◽  
Periodically Poled Lithium Niobate

Coherent generation of tunable, narrow-band THz radiation by optical rectification of femtosecond pulse trains

1997 ◽  
Vol 64 (5) ◽  
pp. 619-621 ◽  
Author(s):  
C. Messner ◽  
M. Sailer ◽  
H. Kostner ◽  
R.A. Höpfel
Keyword(s):  
Femtosecond Pulse ◽  
Narrow Band ◽  
Optical Rectification ◽  
Thz Radiation ◽  
Pulse Trains

WIDELY-TUNABLE, MONOCHROMATIC, AND HIGH-POWER TERAHERTZ SOURCES AND THEIR APPLICATIONS

2003 ◽  
Vol 12 (04) ◽  
pp. 557-585 ◽  
Author(s):  
YUJIE J. DING ◽  
WEI SHI
Keyword(s):  
Peak Power ◽  
Difference Frequency Generation ◽  
Thz Radiation ◽  
Narrow Linewidth ◽  
Nonlinear Materials ◽  
Peak Output Power ◽  
Output Peak Power ◽  
Conversion Efficiencies ◽  
Coherence Lengths ◽  
High Coherence

We have demonstrated that coherent terahertz (THz) waves can be efficiently generated and tuned in extremely-wide ranges based on phase-matched difference-frequency generation (DFG) in second-order nonlinear materials. Among all the nonlinear crystals available, we have chosen GaSe and ZnGeP 2, which correspond to two of the best nonlinear materials for the efficient THz generation. This is due to the fact that these two materials have the lowest and next-to-lowest absorption coefficients in the THz domain. In addition, they possess large nonlinear coefficients. For a single GaSe crystal, continuously-tunable and coherent radiation in the extremely-wide ranges of 2.7–38.4 μ m and 58.2–3540 μ m has been achieved. Hence, a novel and promising THz source is finally available. This source has the additional advantages of high coherence (narrow linewidth) and simple alignment. The peak output power for the THz radiation reaches 209 W at the wavelength of 196 μ m (1.53 THz), which corresponds to a power conversion efficiency of 0.055%. On the other hand, for a single ZnGeP 2 crystal we have efficiently generated a monochromatic THz wave continuously-tunable in the ranges of 83.1–1642 μ m and 80.2–1416 μ m . The highest output peak power achieved so far is 134 W. We have also investigated how to use THz waveguides and long coherence lengths for improving the conversion efficiencies. We have reviewed our results on some important applications using these unique sources.

Sub-Wavelength THz Imaging of the Domains in Periodically Poled Crystals Through Optical Rectification

2020 ◽  
Vol 41 (9) ◽  
pp. 1144-1154
Author(s):  
Gizem Soylu ◽  
Emilie Hérault ◽  
Benoît Boulanger ◽  
Fredrik Laurell ◽  
Jean-Louis Coutaz
Keyword(s):  
Optical Rectification ◽  
Thz Imaging ◽  
Periodically Poled ◽  
Sub Wavelength ◽  
Periodically Poled Crystals
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