Low-cost packaging of VCSELs (vertical cavity surface emitting lasers) is essential for their applications in computers, communications and sensing.   We discuss the fabrication of polymer-based microlenses on VCSEL arrays for beam shaping and efficient coupling with optical fibers.             Drop–on-Demand Microfab Inkjet technique is employed to deposit SU8 lenses on GaAs substrates and on arrays of high-performance,...Continue Reading