A method of coupling at least two planar optical devices that includes the
steps of aligning a first optical device having a substrate and at least
one waveguide to a second optical device having a substrate and at least
one waveguide such that the optical devices have aligned waveguides, and
abutting the aligned waveguides of the first and second optical devices.
The method further includes coupling the respective substrates of the
optical devices together, and fusing the optical waveguide of the first
optical device to the optical waveguide of the second optical device.