Two photon lithography enables writing custom 3D polymer structures on a variety of substrates and orientations. This may include lenses and total internal reflection mirrors that can be used to collimate, collect, and redirect light. Some examples of applications for these structures include:

• Lenses on waveguide edge couplers or vertical emission ports
• Lenses and mirrors on lasers, fibers, etc. 
• Any other self-connected object – use your imagination!