Open Access13-μm dual-wavelength DFB laser chip with modulation bandwidth enhancement by integrated passive optical feedback
Author(s) -
Fei Guo,
Dan Lü,
Lu Guo,
Songtao Liu,
Wu Zhao,
Hao Wang,
Ruikang Zhang,
Qiang Kan,
Ji Chen
Publication year - 2016
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.24.028869
Subject(s) - optics , materials science , bandwidth (computing) , laser , photonics , optoelectronics , photonic integrated circuit , wavelength , distributed feedback laser , chip , modulation (music) , physics , telecommunications , computer science , acoustics
We report a 1.3-μm dual-wavelength distributed feedback (DFB) photonic integrated chip with modulation bandwidth enhancement using integrated optical feedback section. The dual-wavelength DFB lasers were realized using the upper separate confinement heterostructure (SCH) selective area growth (SAG) approach. A modified butt-joint technique was also adopted to achieve high-quality active-passive interface and minimize unintentional intra-cavity optical feedbacks. The fabricated photonic chip exhibited stable single mode operations with a wavelength separation of 2.06 nm. The 3-dB modulation bandwidth was enhanced through the photon-photon resonance effect with f 3dB > 17 GHz and open eyes up to 25 Gbit/s for both channels were also obtained. The design can also be scaled up to higher channel counts and higher data rate.