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Nonpolarizing Beamsplitters

Photonics Spectra
Apr 2011
Research Electro-Optics Inc. (REO)Request Info
 
Cube beamsplitters from REO are intended for demanding dense wavelength division multiplexing applications in telecommunications. Optimized for use in Gires-Tournois interferometer-based interleavers and dispersion compensators, the nonpolarizing beamsplitters provide broadband, polarization-insensitive operation and suitable path length matching for reflected and transmitted beams. This technology offers the transmission and channel isolation characteristics required by long-haul and metro network applications. Traditional nonpolarizing beamsplitters are limited by either a narrow operating band or high internal absorption, according to the company, which says that it avoids these drawbacks by employing all-dielectric, ion-beam-sputtered coatings, together with a contrast material set with a high index of refraction. The devices are available in sizes from 3 to 12.5 mm and are fabricated from fused-silica substrates.


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GLOSSARY
dielectric
Exhibiting the characteristic of materials that are electrical insulators or in which an electric field can be sustained with a minimum dispersion of power. They exhibit nonlinear properties, such as anisotropy of conductivity or polarization, or saturation phenomena.
fused silica
Glass consisting of almost pure silicon dioxide (SiO2). Also called vitreous silica. Frequently used in optical fibers and windows.
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