Temperature insensitive arrayed waveguide grating...

Optical waveguides – With optical coupler – Input/output coupler

Reexamination Certificate

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C385S014000

Reexamination Certificate

active

07965912

ABSTRACT:
Two methods are presented in order to properly compensate the changes of the optical characteristics, which are caused by the optical path length change. First, a path length compensation method in which the additional optical path length, equivalent to the dicing kerf width of the substrate, is added onto the diced-to-be waveguide part of the AWG chip during the waveguide design process and fabrication process so that the compensated optical path length is maintained even after dicing. In addition, a position compensation method is provided in which an additional waveguide is added at the position shifted by a distance equivalent to the kerf width of the substrate such that the additional waveguide undergoes the minimized path length change after dicing is performed.

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