Title :
Phase-sensitive terahertz self-heterodyne system based on photonic techniques
Author :
Hisatake, Shintaro ; Kitahara, G. ; Kukutsu, Naoya ; Fukada, Youichi ; Yoshimoto, Naoto ; Nagatsuma, Tadao
Author_Institution :
Div. of Adv. Electron. & Opt. Sci., Osaka Univ., Toyonaka, Japan
Abstract :
We propose and demonstrate a technique for phase change measurement of continuous terahertz (THz) wave using two 1550 nm laser diodes and optical frequency shifter. Generation of the THz wave is based on photomixing using a uni-traveling-carrier photodiode. Detection of the THz wave is based on heterodyne mixing of the THz wave using a low-temperature-grown GaAs photoconductor with frequency-shifted optical LO beat signal. Measurement of phase shift induced by a single sheet of paper with 85-μm thickness has been demonstrated at 300 GHz.
Keywords :
gallium arsenide; heterodyne detection; microwave phase shifters; microwave photonics; photoconducting materials; semiconductor lasers; terahertz wave detectors; terahertz wave generation; GaAs; THz wave detection; THz wave generation; continuous terahertz wave; frequency-shifted optical LO beat signal; heterodyne mixing; laser diodes; low-temperature-grown gallium arsenide photoconductor; optical frequency shifter; phase change measurement; phase shift measurement; phase-sensitive terahertz self-heterodyne system photonic techniques; photomixing; unitraveling-carrier photodiode; wavelength 1550 nm; Frequency measurement; Imaging; Optical fibers; Optical variables measurement; Phase measurement; Photonics; THz wave; continuous wave; frequency domain spectrometer; low-temperature-grown GaAs; phase sensitive detection; photonic LO; self-heterodyne detection;
Conference_Titel :
Microwave Photonics (MWP), 2012 International Topical Meeting on
Conference_Location :
Noordwijk
Print_ISBN :
978-1-4673-2863-0
DOI :
10.1109/MWP.2012.6474116
