<title>High-efficiency all-dielectric strip-coated beam splitters for the equipartition of infrared input power</title>

Abstract

We describe efficient beam splitters for the equi-partition of infrared input power using combined reflection and transmission by a strip-coated all-dielectric slab. Because no metal coating is used, high efficiency is achieved. The beam splitters use a fused silica parallel-slab that is strip coated with germanium on the front and back sides. Specific designs for operation at 1 .55, 2.02 and 5.0 jim wavelengths are presented.