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1.5%-Δ athermal arrayed-waveguide grating multi/demultiplexer with very low loss groove design

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7 Author(s)
Kamei, S. ; NTT Photonics Labs., NTT Corp., Kanagawa, Japan ; Iemura, K. ; Kaneko, A. ; Inoue, Y.
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We describe a compact 1.5%-Δ athermal silica-based 100-GHz-spacing 16-channel arrayed-waveguide grating (AWG) multi/demultiplexer with a modified groove design for a very low excess loss. We propose new approaches for modifying the shape of the grooves and the arrayed waveguides and optimize the shape modifications for 1.5%-Δ waveguides. By employing this modified groove design, we greatly reduced the groove excess loss from 1.9 to 0.4 dB in the 1.5%-Δ athermal AWG.

Published in:

Photonics Technology Letters, IEEE  (Volume:17 ,  Issue: 3 )