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Wisoptic' standard and precision quality laser windows are fabricated from a variety of substrate
materials, e.g. UVFS
and N-BK7. They are available either with or without AR coatings, and with dia from 12.5 to 101.6 mm and thickness from 1 to 15 mm.
Also we offer uncoated rectangular windows with aperture from 15 x 20 to
50.8 x 50.8 mm and thickness from 2 to 10 mm.
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Thin Film Polarizers are made from composed materials which include a polarizing film, an inner protective film, a pressure-sensitive adhesive layer, and an outer protective film. Polarizer is used to change un-polarized beam into linear polarized beam.
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Optical windows are made in the form of flat plates of a transparent medium that allow light into an instrument. Windows have high optical transmission with little distortion of the transmitted signal, but can not change the magnification of the system.
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Thin Film Polarizers are made from composed materials which include a polarizing film, an inner protective film, a pressure-sensitive adhesive layer, and an outer protective film. Polarizer is used to change un-polarized beam into linear polarized beam.
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When choosing a window, the user should consider whether the material's transmission properties and the mechanical properties of the substrate are consistent with specific requirements of the application. Coating is another important issue for choosing a proper window. WISOPTIC offer a wide variety optical windows with different coatings, e.g. anti-reflection coated precision windows for Nd:YAG laser applications.
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Thin film polarizers are based on interference within a dielectric optical thin-film
coating on a thin glass substrate. They are made from composed materials which include a polarizing film, an inner protective film, a pressure-sensitive adhesive layer, and an outer protective film. Thin film polarizers are used for polarization separation, that's to say
to change un-polarized beam into linear polarized beam.
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WISOPTIC provides sorts of quadric Aspheric Lens and high order Aspheric Lens, as well as infrared Aspheric Lens (ZnS, ZnSe, Ge, etc. ).WISOPTIC Capabilities - Aspheric Lens Medium PrecisionHigh PrecisionAperture5~200 mm20~1000 mmSurface Quality [S/D]< 40/20 [S/D]< 40/20 [S/D]Surface IrregularityPV< 0.5~5 µm RMS< λ/50 @ 632.8 nmAspheric Surface Type Quadric, High order Quadric, High order Manufacture Capability300 pcs/month20 pcs/year
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Compared to more commonly used KTP crystal, KTA
crystal has larger non-linear optical and electro-optical
coefficients. KTA has the added benefit of
significantly reduced absorption in the 2 to 5 μm region. It has found
more and more applications in second harmonic generation (SHG), sum and
difference frequency generation (SFG)/(DFG), optical parametric
oscillation/ amplification (OPO/OPA), and electro-optical Q-switching. WISOPTIC do in-house growing and processing KTA crystal with high optical quality and various options of dimensional and coating specifications.
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Polymer-matrix Gain Medium for Pulsed Dye Laser (PDL)Polymer matrix can be used to make solid laser gain medium of dye lasers. Compared with the commonly used liquid-state dye laser unit, the solid-state material has many advantages, such as the convenience of handling, the various options of dimensions and shapes.
But the dye molecules in the polymer matrix might degradate in a limited time
by triplet excitation, or even destruct permanently. To avoid this shortage, WISOPTIC provides long quality guarantee period of every piece of Dye Laser Cell/Rod made in-house.
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The EO Q-switch (Pockels cell) is an electro-optic device in which the crystal
produces linear changes in the birefringence of the crystal (in contrast
to the Kerr Effect, which is quadratic with E).
Pockels cells are essential components in various optical devices such
as Q-switches for lasers, free space electro-optical modulators, free
space switches. WISOPTIC use highly deuterated DKDP (KD*P) crystal (D%>99%) to make high quality Q-switches with high laser induced damage threshold.
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KTP (KTiOPO4 ) is one of the most commonly used nonlinear optical materials which offers a range of unique features: high optical quality, broad transparency range, wide acceptance
angle, small walk-off angle, and type I and II non-critical
phase-matching (NCPM) in a wide wavelength range.
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The most notable benefit of aspheric lenses is their ability to correct for spherical aberration,
an optical effect which causes incident light rays to focus at
different points when forming an image, creating a blur. Spherical
aberration is commonly seen in spherical lenses, such as plano-convex or
double-convex lens shapes, but aspheric lenses focus light to a small
point, creating comparatively no blur and improving image quality.
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Ceramic Laser Reflector (Ceramic Laser Cavity) works particularly well in Ruby,
Nd:YAG, or Alexendrite laser pumping chambers and can be a highly cost effective
alternative to metal coated reflectors. Compared to metal reflectors, ceramic units offer higher reflectivity
and therefore enhanced laser power. Surfaces can be sealed and coated
with a solarization-resistant glaze to give high bulk reflectivity.
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The Ceramic Laser Reflectors are high reflectance cavities used in solid state and CO2 laser systems. They are built either as a one-piece or two-piece system based on customer requirement.Ceramic cavities produce diffuse reflectance, which offers a very uniform beam profile. This diffuse reflectance also distributes light and consequently decreases hot spots in the pumped medium. These completely dense materials (e.g. Al2O3) exhibit higher strength and scratch resistance than traditional polymeric and thermoplastic materials.
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Dye laser headpiece made from WISOPTIC has very high conversion efficiency: 65%~75% for 532/585nm, 45%~55% for 532/650nm.
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There are four main types of prisms based on the function: dispersion
prism, deflection or reflection prism, rotating prism and offset prism.
Deflection, offset and rotating prisms are commonly used in imaging
applications; diffusion prisms are designed for dispersive light sources
and are not suitable for any application that requires high quality
images.WISOPTIC offers a wide range of optical prisms with various designs, substrates, or coatings.
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Yb:YAG's advantage is a wide pump band and an excellent emission
cross section. It is ideal for diode pumping. The broad absorption band
enables Yb:YAG to maintain uninterrupted pump efficiency across the
typical thermal shift of diode output. High efficiency means a
relatively small dimension Yb:YAG laser crystal will produce high power
output. Based on the YAG host crystal, Yb:YAG can be quickly integrated
into the laser design process.
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Items Specifications Material CTH:YAG (Cr, Tm, Ho - doped YAG)Doping ExtentCr: 0.3~1.2 at%; Tm: 5~6 at%; Ho: 0.3~0.4 at% Crystalline Direction[111] (± 5°)DimensionsDia 3~6 (+0/-0.05) mm × 50~120 (±0.5) mm (customized)Extinction Ratio> 25 dBSingle Pass WFD < λ/8 @633 nm over central areaSurface Quality 10-5 [s-d] per MIL-O-13830BClear Aperture> 90% over central areaEnd-surface Parallelism< 20"Perpendicularity< 5'End-surface Flatness< λ/8 @633 nmChamfer0.2 ± 0.05 mm × 45°Laser CoatingAR/AR @ 209
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KTP Crystal Features• Large Nonlinear Optical (NLO) Coefficients• Wide Phase-matching Acceptance Angle• Broad Temperature and Spectral Bandwidth• High Electro-Optic (E-O) Coefficients
• Nonhygroscopic, Good Chemical and Mechanical Properties
• Relatively High Damage Threshold for E-O modulatorKTP Crystal Applications1. SHG of Nd:Laser - KTP is the most commonly used material for
frequency doubling of Nd:YAG and other Nd-doped lasers, particularly
when the power density is at a low or medium level.
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The improved hydrothermal-grown KTP crystal overcomes the common
electrochromism damage of flux-grown KTP. The hydrothermal-grown KTP (HGTR-KTP, or GTR-KTP) has high damage
threshold, large effective electro-optic coefficients and lower
half-wave voltage. KTP EO Q-switches made by HGTR-KTP crystals utilize thermally compensated
double crystal designs. They are mainly used in pulse lasers with narrow pulse width and high repetition frequency.
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Corner cube prisms are optics which act as corner reflectors.
The basic operation principle is that there are internal reflections on
three mutually orthogonal prism surfaces, producing a direction of a
reflected beam which is nominally parallel to the direction of the
incident beam – with the accuracy limited only by the accuracy of the
surface orientation of the prism.
Precision prisms can offer excellent parallelism of incoming and
reflecting beams.
It is usually specified as an angular deviation, e.g.
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An aspherical lens features a non-spherical but rotationally symmetric
shape with a curvature radius that changes at various points between the
center and the edge. Although producing this type of lens is difficult,
when manufactured properly, it offers greater functionality than a
comparable spherical lens.Spherical Lenses vs. Aspherical LensesSpherical lenses have a spherical surface and the same radius of
curvature across the entire lens. In contrast, aspherical lenses have a
more complicated surface with a gradually changing curvature from center
to edge.
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Polarizing Beamsplitters (PBS) are
designed to split light by polarization state rather than
by wavelength or intensity. PBS are often used in
semiconductor or photonics instrumentation to transmit p-polarized light
while reflecting s-polarized light. Optical isolators use PBS to eliminate feedback-induced damage. PBS are typically designed for 0° or 45° angle of incidence
with a 90° separation of the beams, depending on the configuration.WISOPTIC offers a wide variety of PBS in a
range of configurations including plate, cube, or lateral displacement.
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Potassium dihydrogen phosphate KH2PO4 (KDP) is a
transparent dielectric material best known for its nonlinear optical and
electro-optical properties. Because of its nonlinear
optical properties, it has been incorporated into various laser systems
for harmonic generation and optoelectrical switching.
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