Beam Splitters

A beam splitter is an optical component that is used for splitting an incident light beam in two directions. Beam splitters are used to separate the light by a ratio of power between what is being transmitted through the optic and what is being reflected. Beam Splitters can also be used to separate polarization states as well as different wavelengths of light. Contact an expert at LohnStar Optics to help design and manufacture a thin film coating that meets your specific needs.

Thin Film Polarizers

LohnStar Optics can make plate polarizers in the at virtually all wavelengths. These are typically designed to reflect s-polarized light and transmit p-polarized light. The plot below shows a ZnSe thin film polarizer made for 3950nm. The red line shows S-Pol and the blue line shows P-Pol.

Output Couplers

Output Couplers (also called partial reflectors) are dielectric mirrors used in laser cavities to transmit a portion of the intracavity power. The backside surface is normally coated with an AR coating to minimize back surface reflection. Typical substrate materials for Output Couplers include ZnSe, YAG, Ge, CaF2, and FuSi.

The plot below shows a ZnSe output coupler designed to reflect 40% of the light and transmit 60% at 9300nm.

The plot below shows a InP output coupler designed to reflect 3% at 9100nm