The first example of hybrid diffractive/graded-index optical integration is
presented. The demonstrated 1:3 beamsplitter for fiber optics consists of
two GRIN lenses and one diffractive element, which are fabricated by ion ex
change and stacked together to form a solid unit. The unit is coupled with
the input optical fiber and with three output ones. (C) 2001 Society of Pho
to-Optical Instrumentation Engineers.