Journal ArticleDOI
Precision Beam Splitters for CO 2 Lasers
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TLDR
The semiconductors investigated were GaAs, CdTe, and ZnSe in addition to one alkali-halide KCl, and standard deviations for the beam splitter ratios of 1% over the power range were typical.Abstract:
Beam splitters for 10-μm lasers are discussed and then applied to the precision measurement of high average powers. In particular, beam splitter stability has been investigated in various materials over the 20–600-W power range with power densities up to 1 kW/cm2. The absolute beam splitter ratios are given along with the achieved measurement precisions. The semiconductors investigated were GaAs, CdTe, and ZnSe in addition to one alkali-halide KCl. Standard deviations for the beam splitter ratios of 1% over the power range were typical. Absolute ratios agree with the predictions from Fresnel’s equations to 1% or better. The best measurement was made on ZnSe when a standard deviation of 0.4% was obtained for the measurement of a ratio that agreed with a calculation from Fresnel’s equations to better than 0.5%.read more
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Journal ArticleDOI
Refractive Index of ZnS, ZnSe, and ZnTe and Its Wavelength and Temperature Derivatives
TL;DR: In this article, the authors search, compile, and analyze refractive index data of ZnS, ZnSe, and ZnTe and generate the recommended values of refractive indices for the transparent spectral region.
Journal ArticleDOI
Simultaneous reflection and refraction of light without change of polarization by a single-layer-coated dielectric surface.
TL;DR: The reflection and refraction of light of wavelength lambda at an angle of incidence Phi by the interface between two dielectric media of refractive indices N(0) and N(2) can be made completely independent of polarization by introducing a thin layer ofRefractive index N(1) = (N(0)-N(2))(1/2) and thickness d = (lambda/4) (N-1)(2) - N-0)(2).
Patent
Adjustable beam splitter
TL;DR: An adjustable beam splitter as discussed by the authors includes a pentaprism type reflector unit including a housing, a splitter mirror positioned in the housing for transmitting a portion of an input energy beam and for reflecting the reflected portion of the input beam.
Journal ArticleDOI
High‐power CO2 laser‐beam monitor
TL;DR: A diagnostic system for measuring the beam power and quality of a high-power cw CO(2) electro-aerodynamic laser is described and a small fraction of the main laser beam was split off for diagnostic purposes.
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