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IEICE Electronics Express
Vol. 8 (2011) No. 24 P 2054-2060

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http://doi.org/10.1587/elex.8.2054

LETTER

We propose a novel method to compensate for the phase errors of a multilayered arrayed waveguide grating (AWG) used in a liquid-crystal-on-silicon (LCOS)-based wavelength selective switch (WSS). In this scheme, an additional LCOS is employed to externally compensate for the phase errors of the AWG in a layer-by-layer manner for both planes of polarization. This compensation scheme enables us to improve the yield of the WSS: specifically, we demonstrate that the additional LCOS drastically reduces the loss and polarization-dependent loss (PDL) of the WSS.

Copyright © 2011 by The Institute of Electronics, Information and Communication Engineers

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