Phase error compensation for multilayered AWG in LCOS-based WSS

Keisuke Sorimoto; Kenji Kintaka; Hitoshi Kawashima; Masahiko Mori; Toshifumi Hasama; Hiroshi Ishikawa; Hiroyuki Tsuda; Hisato Uetsuka

doi:10.1587/elex.8.2054

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Phase error compensation for multilayered AWG in LCOS-based WSS

Keisuke Sorimoto, Kenji Kintaka, Hitoshi Kawashima, Masahiko Mori, Toshifumi Hasama, Hiroshi Ishikawa, Hiroyuki Tsuda, Hisato Uetsuka

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Keywords: wavelength selective switch, liquid crystal on silicon, arrayed waveguide grating, multilayered waveguide, phase error compensation

JOURNAL FREE ACCESS

2011 Volume 8 Issue 24 Pages 2054-2060

DOI https://doi.org/10.1587/elex.8.2054

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Abstract

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.

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