Open AccessGeneration of frequency-modulated sub-terahertz signal using microwave photonic technique
Author(s) -
Ho-Jin Song,
Kyoung-Hwan Oh,
Nobutaka Shimizu,
Naoya Kukutsu,
Yuichi Kado
Publication year - 2010
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.18.015936
Subject(s) - terahertz radiation , photomixing , optics , heterodyne (poetry) , frequency modulation , signal (programming language) , terahertz spectroscopy and technology , phase modulation , microwave , heterodyne detection , photonics , modulation (music) , photodetector , terahertz gap , optoelectronics , materials science , physics , phase noise , radio frequency , terahertz metamaterials , laser , far infrared laser , telecommunications , acoustics , computer science , quantum mechanics , programming language
We present a photonic technique for generating a frequency- modulated sub-terahertz signal for non-destructive or noninvasive sensing and imaging applications. Large frequency deviation was achieved by using optical phase modulation and heterodyne photomixing with an uni-travelling photodetector. The operation principle is theoretically derived and explained. In addition, the generation of 350-GHz frequency- modulated sub-terahertz signal with 6.7-GHz frequency deviation is experimentally demonstrated, and the possibility of frequencies up to 1 THz and wider frequency deviations is discussed.