Ultrawide AWG with hyper-Gaussian profile

@article{Fondeur2004UltrawideAW,
  title={Ultrawide AWG with hyper-Gaussian profile},
  author={B. Fondeur and A. L. Sala and Hirohito Yamada and Russell Brainard and Eric Egan and S. Thekdi and N. Gopinathan and D. Nakamoto and Aditya Vaidyanathan},
  journal={IEEE Photonics Technology Letters},
  year={2004},
  volume={16},
  pages={2628-2630}
}
We present the principle of hyper-Gaussian arrayed waveguide grating (AWG), applied successfully to realize an ultraflat 500-GHz spacing demultiplexer with 1-dB passband above 80% of the channel spacing, and a zero chromatic dispersion 50-GHz spacing wide-band AWG.