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DFB laser array based on four phase-shifted sampled Bragg gratings with precise wavelength control

Authors :
Yiming Sun
Bocheng Yuan
Xiao Sun
Song Liang
Yongguang Huang
Ruikang Zhang
Shengwei Ye
Yizhe Fan
Weiqing Cheng
John H. Marsh
Lianping Hou
Source :
Optics Letters. 47:6237
Publication Year :
2022
Publisher :
Optica Publishing Group, 2022.

Abstract

A four-laser array based on sampled Bragg grating distributed feedback (DFB) lasers in which each sampled period contains four phase-shift sections is proposed, fabricated, and experimentally demonstrated. The wavelength spacing between adjacent lasers is accurately controlled to 0.8 nm ± 0.026 nm and the lasers have single mode suppression ratios larger than 50 dB. Using an integrated semiconductor optical amplifier, the output power can reach 33 mW and the optical linewidth of the DFB lasers can be as narrow as 64 kHz. This laser array uses a ridge waveguide with sidewall gratings and needs only one metalorganic vapor-phase epitaxy (MOVPE) step and one III-V material etching process, simplifying the whole device fabrication process, and meeting the requirements of dense wavelength division multiplexing systems.

Details

ISSN :
15394794 and 01469592
Volume :
47
Database :
OpenAIRE
Journal :
Optics Letters
Accession number :
edsair.doi...........a6fc8442f245829777b9b091889a8fe8
Full Text :
https://doi.org/10.1364/ol.475909