Penalty-free polarisation compensation of SiO/sub 2//Si arrayed waveguide grating wavelength multiplexers using stress release grooves

摘要

A new method for the compensation of polarisation sensitivity of arrayed waveguide grating wavelength multiplexers based on SiO/sub 2/ is presented. By means of stress release grooves, fabrication induced waveguide birefringence is compensated without performance degradation. Reductions of TE/TM passband shifts from 0.66 nm to >0.05 nm are demonstrated.