A Laminate Cantilever Waveguide Optical Switch

This paper describes the use of optical laminate optics that utilizes both passive 2-D optical elements and active components. This is demonstrated in a proof-of-concept 1x2 optical switch concept that is compatible with micro electrical mechanical systems (MEMS) fabricated in laminates. The device uses a waveguide structure that is precision cut to form a cantilever structure. The cantilever, which acts as a bendable waveguide, can be positioned into two locations to align with one of two corresponding waveguides. A light beam is directed into the front end of the cantilever which couples the signal to the tip of the cantilever. The cantilever tip can be positioned to align with one of two second waveguides, thereby sending the optical signal into a specified output. The cantilever is moved using an electromagnetic actuation force, and can be magnetically latched in position so that no further power is required to hold it in place. The unique aspect of this work is that the entire device can be fabricated using laminate technology commonly found in packaging and precision PCB foundries. This allows one to utilize materials and manufacturing methods not available to silicon processing, such as the use of a flexible polymer cantilever waveguide and magnetic materials. Further, it allows integration into printed circuits. We have demonstrated proof-of-concept for this device. This paper describes the design of the structure in laminates and shows initial results.