Enhancement of terahertz wave difference frequency generation based on a compact walk-off compensated KTP OPO

2010 ◽  
Vol 283 (18) ◽  
pp. 3520-3524 ◽  
Author(s):  
Kai Zhong ◽  
Jianquan Yao ◽  
Degang Xu ◽  
Zhuo Wang ◽  
Zhongyang Li ◽  
...  
Keyword(s):  
Difference Frequency Generation ◽  
Terahertz Wave ◽  
Difference Frequency ◽  
Frequency Generation

Theoretical study of tunable terahertz wave based on difference-frequency generation in AgGaSe2 crystal

2010 ◽  
Vol 22 (11) ◽  
pp. 2653-2657
Author(s):  
徐世林 Xu Shilin ◽  
张会云 Zhang Huiyun ◽  
张玉萍 Zhang Yuping ◽  
王翠玲 Wang Cuiling
Keyword(s):  
Theoretical Study ◽  
Difference Frequency Generation ◽  
Terahertz Wave ◽  
Difference Frequency ◽  
Frequency Generation

scholarly journals Optical external efficiency of terahertz quantum cascade laser based on Čerenkov difference frequency generation

2019 ◽  
Vol 28 (04) ◽  
pp. 1950036
Author(s):  
A. Hamadou ◽  
J.-L. Thobel ◽  
S. Lamari
Keyword(s):  
Quantum Cascade Laser ◽  
Quantum Cascade Lasers ◽  
Difference Frequency Generation ◽  
Terahertz Wave ◽  
Difference Frequency ◽  
Infrared Transmission ◽  
Mid Infrared ◽  
Quantum Cascade ◽  
Frequency Generation ◽  
External Efficiency

In this paper, we consider terahertz sources based on Čerenkov difference frequency generation in a dual-wavelength mid-infrared quantum cascade laser and calculate analytically the optical external efficiency of the out-going terahertz wave. The mid-infrared pumps operate simultaneously and have a common upper level. For short cavity lengths and low terahertz losses in the substrate, we find that implementation of the Čerenkov emission scheme in terahertz difference frequency generation quantum cascade lasers improves the optical external efficiency dramatically. The maximum value of the latter is close to 19%, but is only attainable if the laser exhibits negligible mid-infrared transmission losses.

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