0.15 dB/cm loss in Unibond SOI waveguides

The optical loss of Unibond waveguides is measured and reported for the first time, using grating couplers. At a wavelength of 1.3 /spl mu/m, a loss of 0.15/spl plusmn/0.05 dB/cm is obtained for TE polarisation. This allows good quality low loss integrated optical circuits to be fabricated at low cost.