Open AccessMonolithic dual-mode distributed feedback semiconductor laser for tunable continuous-wave terahertz generation
Author(s) -
Namje Kim,
Jae-Wook Shin,
Eundeok Sim,
Chul Wook Lee,
Dae-Su Yee,
Min Yong Jeon,
Yudong Jang,
Kyung Hyun Park
Publication year - 2009
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.17.013851
Subject(s) - terahertz radiation , materials science , laser , continuous wave , optics , optoelectronics , semiconductor laser theory , distributed feedback laser , semiconductor , far infrared laser , terahertz spectroscopy and technology , photomixing , tunable laser , wavelength , physics , terahertz metamaterials
We report on a monolithic dual-mode semiconductor laser operating in the 1550-nm range as a compact optical beat source for tunable continuous-wave (CW) terahertz (THz) generation. It consists of two distributed feedback (DFB) laser sections and one phase section between them. Each wavelength of the two modes can be independently tuned by adjusting currents in micro-heaters which are fabricated on the top of the each DFB section. The continuous tuning of the CW THz emission from Fe(+)-implanted InGaAs photomixers is successfully demonstrated using our dual-mode laser as the excitation source. The CW THz frequency is continuously tuned from 0.17 to 0.49 THz.