Abstract
We have developed an $N
\times N$ cyclic-frequency router with improved performance
by employing two types of modified configuration; a uniform-loss and cyclic-frequency
(ULCF) arrayed-waveguide grating (AWG) and an interconnected multiple AWG.
We have demonstrated a compact 50-GHz-spacing 64$\,\times\,$64 ULCF-AWG router with low
and uniform insertion losses of 5.4–6.8 dB and frequency deviations
from the grid of less than $\pm
{8}~{\rm GHz}$. We have also demonstrated a 100-GHz-spacing
8$\,\times\,$8
interconnected multiple-AWG router with a practical configuration, very low
and uniform insertion losses of 2.3–3.4 dB, and frequency deviations
from the grid of less than $\pm
{6}~{\rm GHz}$. We discuss the suitable or realizable scale $N$ of the two types
of routers by comparison with a conventional AWG router in terms of optical
and dimensional performance and productivity.
© 2009 IEEE
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