Open AccessTunable continuous-wave terahertz generation/detection with compact 155 μm detuned dual-mode laser diode and InGaAs based photomixer
Author(s) -
Namje Kim,
Shihui Han,
Hyunsung Ko,
Young Ahn Leem,
Han-Cheol Ryu,
Chul Wook Lee,
Donghun Lee,
Min Yong Jeon,
Sam Kyu Noh,
Kyung Hyun Park
Publication year - 2011
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.19.015397
Subject(s) - terahertz radiation , optics , optoelectronics , continuous wave , laser , photomixing , diode , materials science , detector , physics , far infrared laser , terahertz metamaterials
We demonstrate a tunable continuous-wave (CW) terahertz (THz) homodyne system with a novel detuned dual-mode laser diode (DML) and low-temperature-grown (LTG) InGaAs photomixers. The optical beat source with the detuned DML showed a beat frequency tuning range of 0.26 to over 1.07 THz. Log-spiral antenna integrated LTG InGaAs photomixers are used as THz wave generators and detectors. The CW THz radiation frequency was continuously tuned to over 1 THz. Our results clearly show the feasibility of a compact and fast scanning CW THz spectrometer consisting of a fiber-coupled detuned DML and photomixers operating in the 1.55-μm range.