Open Access1 × 8 MMI based multi-channel interference laser integrated with SOA through a 2-port multimode interference reflector
Author(s) -
Quanan Chen,
Chong Jiang,
Xiang Ma,
Ye Liu,
Dongtang Yang,
Weihua Guo
Publication year - 2018
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.26.019940
Subject(s) - materials science , optics , laser , multi mode optical fiber , optoelectronics , interference (communication) , coupling loss , reflector (photography) , port (circuit theory) , fabrication , optical fiber , channel (broadcasting) , physics , telecommunications , electronic engineering , medicine , light source , alternative medicine , pathology , computer science , engineering
A 1 × 8 multimode interferometer (MMI) based multi-channel interference (MCI) widely tunable laser integrated with semiconductor optical amplifier (SOA) through a 2-port multimode interference reflector (MIR) is reported in this paper. The 2-port MIR can be fabricated with deeply etched waveguides of the MCI laser with no extra fabrication process, which decreases the fabrication complexity greatly. To reduce the loss arising from mode mismatch between surface and deep ridge waveguides, a tapered shallow-deep transition structure is designed and fabricated with a loss of 0.09 dB ± 0.03 dB. The MCI laser with integrated SOA achieves a tuning range of 52.5 nm with side mode suppression ratios higher than 40 dB across the tuning range and more than 13 dBm output power coupled into a lensed fiber at room temperature.