Performance improvement in silicon arrayed waveguide grating by suppression of scattering near the boundary of a star coupler.

@article{Park2015PerformanceII,
  title={Performance improvement in silicon arrayed waveguide grating by suppression of scattering near the boundary of a star coupler.},
  author={Jaegyu Park and Gyungock Kim and Hyundai Park and Jiho Joo and SangGi Kim and Myung-Joon Kwack},
  journal={Applied optics},
  year={2015},
  volume={54 17},
  pages={
          5597-602
        }
}
We investigate the reduction of transition loss across the star coupler boundary in a silicon arrayed waveguide grating (AWG) by suppressing multimode generation and scattering near the boundary of a star coupler. Eight-channel silicon AWGs were designed with optimal conditions based on enhanced field matching in combination with ultrashallow etched structures. The fabricated AWG demonstrates an insertion loss down to 0.63 dB with a cross talk of -23 to -25.3 dB, exhibiting ~0.8 dB improvement… CONTINUE READING
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