Polarisation-insensitive semiconductor arrayed waveguide grating integrated with spotsize converter

A polarisation-insensitive semiconductor arrayed waveguide grating integrated with a spotsize converter has been fabricated which features a low loss of 7 dB and a low polarisation-dependent loss of 0.2 dB on average when coupled to a flat-ended fibre. The channel crosstalk is lower than 27 dB for all channels, and the misalignment tolerance is increased to /spl plusmn/2 /spl mu/m.

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