The four outer surfaces are coated with our Broadband Multilayer Antireflection Coating with per surface reflectance of 0.5%. The interface between the prisms is a dielectric, achromatic beamsplitter coating which produces a 50/50 split ±5% across the visible spectrum when used with unpolarized light. with P-polarized light the ratio of R/T is 30/70, and with S-polarized, 70/30, approximately. With grade A glass and all dielectric coatings, the insertion loss is negligible. However, because the Prisms are cemented together, use with high-power lasers which may burn the cement should be avoided.

*Polarization-State-Preserving

THE OFR PSP BEAMSPLITTER utilizes

The state of polarization(SOP) of a beam of light can be described in terms of its S and P components, and the phase angle between them. In many beamsplitter applications, it is desirable that there be no change in the SOP between the input and the output beams. However, it is a natural phenomenon that the SOP of the input beam will be modified at the beamsplitting boundary, for non-normal incidence.
Various attempts to preserve the SOP have been made, for example ¡°non-polarizing¡±beamsplitters. However, because of limitations of traditional coating techniques, these merely maintain the S and P amplitudes but not the phase angle between them. In addition, they are characterized by narrowbandwidths and fields-of-view.




 

unique and proprietary technology. It is the only beamsplitter on the market that preserves the SOP of the input beam, and is characterized by wide bandwidths (50-100nm) and wide fields-of-view(¡Ã5¢ª). The PSP Beamsplitter produces a 50/50 split within 3% for both output beams, and preserves the SOP and phase angle of the polarized components of the input.

BEAMSLITTERS AND SOP

Fresnel's reflection coefficients describe the state of polarization(SOP) of reflected light in terms of the intensities of its S and P components. When the angle of incidence is non-perpendicular, the SOP of the reflected light will be different from beams are derived from equations that relate the angle of incidence at the boundary surface and the indices of refraction of the incident and transmission media. See formulas on the second side of the front cover of this that of the incident light.
The descriptions of the two resultant split section.

Broadband PSP* Beamsplitter
*Polaization State Preserving
BANDWIDTH : ¥ë±50-100MM

State of Polarization (SOP) of Both Outputs

For applications in which it is necessary to equalize the energy density across an expanded laser beam, the Flat-Top Apodizer Plate utilizes a plano-convex, neutral gray glass lens cemented against a plano-concave, clear glass lens. The result is a plane-parallel plate with a radially-varying neutral attenuation. With a correctly expanded beam, this combination produces a "flat-top" energy distribution from a Gaussian beam, with ~35% of the original laser power retained.
Antireflection coatings are not available.