scholarly journals Study of imaging system based on the tunable terahertz wave source with quasi-Gaussian beam output

2008 ◽  
Vol 57 (8) ◽  
pp. 4984
Author(s):  
Zhang Xian-Bin ◽  
Shi Wei
Keyword(s):  
Gaussian Beam ◽  
Imaging System ◽  
Terahertz Wave ◽  
Wave Source ◽  
Beam Output

scholarly journals Wave Structure Function and Long-Exposure MTF for Gaussian-Beam Waves Propagating in Anisotropic Maritime Atmospheric Turbulence

2020 ◽  
Vol 10 (16) ◽  
pp. 5484
Author(s):  
Bing Guan ◽  
Haiyang Yu ◽  
Wei Song ◽  
Jaeho Choi
Keyword(s):  
Structure Function ◽  
Gaussian Beam ◽  
Atmospheric Turbulence ◽  
Isotropic Turbulence ◽  
Imaging System ◽  
Wave Structure ◽  
Modulation Transfer ◽  
Horizontal Path ◽  
Kolmogorov Turbulence ◽  
Waves Propagation

The expressions of wave structure function (WSF) and long-exposure modulation transfer function (MTF) for laser beam propagation through non-Kolmogorov turbulence were derived in our previous work. In this paper, based on anisotropic maritime atmospheric non-Kolmogorov spectrum, the new analytic expression of WSF for Gaussian-beam waves propagation through turbulent atmosphere in a horizontal path is derived. Moreover, using this newly derived expression, long-exposure MTF for Gaussian-beam waves is obtained for analyzing the degrading effects in an imaging system. Using the new expressions, WSF and MTF for Gaussian-beam waves propagating in terrestrial and maritime atmospheric turbulence are evaluated. The simulation results show that Gaussian-beam waves propagation through maritime turbulence obtain more degrading effects than terrestrial turbulence due to the humidity and temperature fluctuations. Additionally, the degrading effects under anisotropic turbulence get less loss than that of isotropic turbulence.

Development of Gyrotron FU CW GIII with a Gaussian beam output

2012 ◽  
Author(s):  
Yoshinori Tatematsu ◽  
Yuusuke Yamaguchi ◽  
Toshitaka Idehara ◽  
Tatsuru Kawase ◽  
Hideaki Kato ◽  
...  
Keyword(s):  
Gaussian Beam ◽  
Beam Output

scholarly journals Continuous-terahertz-wave molecular imaging system for biomedical applications

2016 ◽  
Vol 21 (7) ◽  
pp. 076006 ◽  
Author(s):  
Rui Zhang ◽  
Liangliang Zhang ◽  
Tong Wu ◽  
Ruixue Wang ◽  
Shasha Zuo ◽  
...  
Keyword(s):  
Molecular Imaging ◽  
Biomedical Applications ◽  
Imaging System ◽  
Terahertz Wave

1 MW and long pulse operation of Gaussian beam output gyrotron with CVD diamond window for fusion devices

2001 ◽  
Vol 53 (1-4) ◽  
pp. 399-406 ◽  
Author(s):  
Atsushi Kasugai ◽  
Keishi Sakamoto ◽  
Koji Takahashi ◽  
Ken Kajiwara ◽  
Hiroaki Shoyama ◽  
...  
Keyword(s):  
Gaussian Beam ◽  
Cvd Diamond ◽  
Pulse Operation ◽  
Beam Output ◽  
Long Pulse

Design of Terahertz-Wave Transmission Imaging System

2013 ◽  
Vol 347-350 ◽  
pp. 1940-1944 ◽  
Author(s):  
Jie Pei ◽  
Gang Chen
Keyword(s):  
Imaging System ◽  
Image Data ◽  
Terahertz Wave ◽  
Incident Wavelength ◽  
Backward Wave Oscillator ◽  
Transmission Imaging ◽  
Wave Oscillator ◽  
Object Movement ◽  
Wave Image ◽  
Data Acquisition Unit

An imaging system based on the transmission and reflection modes in the terahertz (THz) region is developed by using a backward-wave oscillator (BWO) as source, a Golay-Cell as detector, and an oscilloscope as data acquisition unit. The system software based on the oscilloscope is designed to control the object movement, and the capture and display of the continuous THz wave image data. The imaging of different objects is tested at the frequencies of 450 GHz and 890 GHz to show the validity of the imaging system at room temperature. The influence of objects humidity and thickness, incident wavelength, and translation step on the THz imaging is discussed in details.

Terahertz-Wave Imaging System Based on Backward Wave Oscillator

2012 ◽  
Vol 2 (5) ◽  
pp. 504-512 ◽  
Author(s):  
Gang Chen ◽  
Jie Pei ◽  
Fei Yang ◽  
Xiao Yang Zhou ◽  
Z. L. Sun ◽  
...  
Keyword(s):  
Imaging System ◽  
Terahertz Wave ◽  
Backward Wave Oscillator ◽  
Wave Oscillator ◽  
Backward Wave ◽  
Wave Imaging
Sign in / Sign up

Export Citation Format

Share Document