Open AccessDistributed feedback laser diode integrated with distributed Bragg reflector for continuous-wave terahertz generation
Author(s) -
Namje Kim,
Shihui Han,
Han-Cheol Ryu,
Hyunsung Ko,
JeongWoo Park,
Donghun Lee,
Min Yong Jeon,
Kyung Hyun Park
Publication year - 2012
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.20.017496
Subject(s) - distributed bragg reflector , optics , materials science , distributed feedback laser , laser , terahertz radiation , optoelectronics , distributed bragg reflector laser , continuous wave , fiber bragg grating , diode , tunable laser , semiconductor laser theory , laser diode , wavelength , physics
A widely tunable dual mode laser diode with a single cavity structure is demonstrated. This novel device consists of a distributed feedback (DFB) laser diode and distributed Bragg reflector (DBR). Micro-heaters are integrated on the top of each section for continuous and independent wavelength tuning of each mode. By using a single gain medium in the DFB section, an effective common optical cavity and common modes are realized. The laser diode shows a wide tunability of the optical beat frequency, from 0.48 THz to over 2.36 THz. Continuous wave THz radiation is also successfully generated with low-temperature grown InGaAs photomixers from 0.48 GHz to 1.5 THz.