Title :
Two-dimensional electro-optic sampling of THz radiation using high-speed CMOS camera combined with arrayed polarizers
Author :
Kitahara, Hideaki ; Yonera, Taijiro ; Miyamaru, Fumiaki ; Tani, Masahiko ; Hangyo, Masanon
Author_Institution :
Inst. of Laser Eng., Osaka Univ., Japan
fDate :
27 Sept.-1 Oct. 2004
Abstract :
We have developed a terahertz (THz) imaging system based on two-dimensional electro-optic sampling using a high speed CMOS camera and a arrayed-polarizer matched to the camera. By operating the CMOS camera in a normalized differential mode on the single-shot basis synchronized to the pump laser pulses, a better signal-to-noise ratio is achieved in comparison to the system with a non-differential, low-frame-rate CCD camera.
Keywords :
CCD image sensors; CMOS image sensors; electro-optical devices; optical polarisers; submillimetre wave imaging; arrayed polarizers; high speed CMOS camera; low frame rate CCD camera; nondifferential CCD camera; normalized differential mode; pump laser pulses; signal-to-noise ratio; single-shot basis synchronization; terahertz imaging system; terahertz radiation; two dimensional electro-optic sampling; CMOS image sensors; Cameras; Charge-coupled image sensors; Laser excitation; Laser modes; Lasers and electrooptics; Optical imaging; Polarization; Pump lasers; Sampling methods;
Conference_Titel :
Infrared and Millimeter Waves, 2004 and 12th International Conference on Terahertz Electronics, 2004. Conference Digest of the 2004 Joint 29th International Conference on
Print_ISBN :
0-7803-8490-3
DOI :
10.1109/ICIMW.2004.1422212
