A new method of optical interconnection for multiply stacked planar optical circuit boards using 45° reflection coupling

We developed, for the first time to our knowledge, a new method of providing optical interconnection for multiply stacked planar optical waveguide boards, using 45 degrees reflection coupling. This consists of two 45 degrees reflection mirrors vertically stacked and facing each other. We developed special molds that can imprint rectangular polymer waveguides and 45 degrees reflection mirrors simultaneously. This opens up new ways of optically integrating multiple stacks of optical wire circuit boards for high-density photonic circuit integration application. (C) 2009 Elsevier B.V. All rights reserved.