Frequency modulation based continuous-wave terahertz homodyne system | Zendy

Il-Min Lee | Zendy; Namje Kim | Zendy; Eui Su Lee | Zendy; Sang-Pil Han | Zendy; Kiwon Moon | Zendy; Kyung Hyun Park | Zendy

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Frequency modulation based continuous-wave terahertz homodyne system

Author(s) -

Il-Min Lee,

Namje Kim,

Eui Su Lee,

Sang-Pil Han,

Kiwon Moon,

Kyung Hyun Park

Publication year - 2015

Publication title -

optics express

Language(s) - Uncategorized

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.23.000846

Subject(s) - terahertz radiation , optics , homodyne detection , direct conversion receiver , continuous wave , terahertz spectroscopy and technology , modulation (music) , photomixing , frequency modulation , refractive index , materials science , laser , physics , optoelectronics , terahertz metamaterials , far infrared laser , computer science , telecommunications , bandwidth (computing) , acoustics

In this study, inspired by the frequency-modulated continuous-wave (FMCW) method, an operation scheme of continuous-wave (CW) terahertz (THz) homodyne system is proposed and evaluated. For this purpose, we utilized the fast and stable wavelength tuning characteristics of a dual-mode laser (DML) as a beating source. Using the frequency-modulated THz waves generated by DML, a cost-effective and robust operation of CW THz system to be applicable to the measurements of thickness or refractive index of a sample is demonstrated. We believe that the proposed scheme shows a potential to the implementations of compact and fast CW THz measurement systems that can be useful in many THz applications.

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