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Beamsplitters are designed to separate a single beam of light into two beams that are normal to one another. The intensity of the separated beams depends upon the type of coating and the specific properties of the light.
Most beamsplitters use dielectric coatings that are wavelength and polarization sensitive; therefore it is highly recommended that one look carefully at the transmission curves to ensure that the beamsplitter will perform as needed.
Cube beamsplitters with hybrid (dielectric/metal) coatings are relatively insensitive to changes over a broad range of polarization and wavelength, and our laser-line coatings are polarization insensitive at their design wavelength.
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Beamsplitters are used to reflect a certain percentage of incident energy, while transmitting the remaining energy. In most cases, beamsplitters are angle, wavelength, and polarization sensitive.
Most beamsplitter coatings are highly polarization sensitive. Thus, if the source’s polarization state varies with time, as in some randomly polarized lasers, the beamsplitters transmission will also vary with time.
The beamsplitters described here are designed for use at 45° angle of incidence and 10.6µm wavelength. At this angle of incidence, there can be significant differences in the transmittance/reflectance values for s and p-polarizations. It is essential that the laser’s polarization state be specified when ordering these optics. (See our Polarization tutorial for definitions of s and p polarizations.)
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REO's thin film polarizing beamsplitters offer industry leading performance created to the highest standards of quality and verified by state of the art functional metrology. Our high energy Ion Beam Sputtering coating process along with our proprietary adhesive-free bonding process insure that our beamsplitters will exceed all Telcordia requirements for durability and reliability.
With the best extinction and bandwidth specifications in the industry, REO's polarizing beamsplitters are ideal for demanding polarization diversity applications
such as interleavers, switches, circulators, and isolators. REO offers these polarizers in single hypotenuse versions, with right angle deviation between s and p output beams, or double hypotenuse versions, with parallel output beams. They feature the high power handling capability necessary for pump combination applications, and can be customized to match the most demanding requirements for size and cost. REO's beamsplitters can be integrated with our etalons or prisms using our adhesive-free bonding process to make assemblies that provide a precision drop-in optical solution that reduces costly assembly and alignment time
REO has the proven high volume capacity for manufacturing polarizing beamsplitter products using processes that are engineered and controlled to be high quality, high yield, and cost effective. Our established ISO 9001 certified quality system guarantees results that meet every specification, every time.
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Rolyn Pellicle Beamsplitters are precision optical components. The actual pellicle is an ultra-thin membrane. It is bonded to the face of a precision lapped hard anodized aluminum frame which has been optically polished to achieve the absolute ultimate flatness commensurate with the dimensions of the ring.
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Beamsplitters are used to split or combine beam of light. Plates and cubes are the most common types. The performance of beamsplitters are mainly depended on the coating specifications. In selecting beamsplitters, the forms, coating, transmission and damage threshold should be considered.
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Beamsplitters are used to split or combine beams of light. Tower provides some standard beamsplitters, but most are custom made.
Plates are used for most laser applications as they exhibit low absorption. Cubes are a convenient, protected form for low power applications. The performance of the beamsplitters is a function of the beamsplitter coating.
Beamsplitter Cubes
These beamsplitters are based upon using two complementary prisms. The output beam, which is parallel to the input beam, is called the p-polarized beam, while the orthogonal output beam is defined as s-polarized.
Basic Specifications:
Material: BK7
Dimension Range: 3.2mm to 50.8mm
Surface quality: 60/40 scratch and dig
Principal transmittance: Tp > 95% and Ts < 1%
Principal reflectance: Rs > 99% and Rp < 5%
Wavelength range: 226nm to 2300nm
Beamsplitter Plates
Are primarily used to split or re-combine a beam of light, especially in high power lasers. When using beam splitter plates the two partial beams travel different optical paths. The optical paths depend on the incident angle and the thickness of the plates.
Basic Specifications:
Material: BK7
Diameter Range: 10mm to 50.8mm
Flatness: l /4 @ 632.8 nm per 25 mm
Surface quality: 60/40 scratch and dig
T/R: 50/50 ± 5%
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ur standard 50/50 beamsplitters use BK7 optical glass with dielectric coating on the hypotenuse surface. The outside surfaces have MgF2 with 60-40 scratch-dig. The surface flatness is 1 wave NR inch. Angle tolerance is ±5 arc minutes.
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* Aluminum Circular Variable High Precision Beamsplitters
* Aluminum Linear Variable High Precision Beamsplitters
* Cube Beamsplitters All Dielectric
* Cube Beamsplitters Metallic Dielectric
* Diode Laser Non-polarizing Cube Beamsplitters
* Laser Line Non-polarizing Plate Beamsplitters
* Plate Beamsplitters
* Polka Dot Beamsplitters
* Variable Dielectric Circular Beamsplitters For Excimer Lasers
* Variable Dielectric Linear Beamsplitters For Excimer Lasers
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PPC beamsplitter cubes are derived from a unique combination of IBS coatings, ultraprecise fabrication capabilities and our epoxy-free bonding technology--Chemically Activated Direct Bonding (CADB) which results in zero-bondline thicknesses. In addition to the standard sizes and wavelengths shown, we can produce high-energy cube beamsplitters from 1x1 mm2 in size, and in a wide variety of materials including fused silica, BK7, YAG and other optical glasses and crystals.
Whether you need 10 or 10,000 pieces, our precision wafer-based processes result in high yields and competitive costs, especially at higher volumes. These high-precision assemblies have been widely used in telecommunications, semi-conductor and biomedical applications where transmission efficiency, extinction ratio and wavefront quality are all critical specifications.
Call us for more information on high-energy narrowband and broadband polarizing beamsplitter cubes for other wavelengths from 266nm to 2200nm, or to discuss your requirements for custom waveplates, polarizers and micro-optic assemblies.
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Cube Beam Splitters
Size: 4mm to 100mm
Face Flatness: up to %u03BB/10 @ 546.1nm
Surface Quality: up to 20-10
Transmitted Beam Deviation: < 5 arc min
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These are thin film polarizers constructed as a cube. Thin film polarizers utilize the polarization which occurs on reflection from a plane surface. By combining a large number of such surfaces in a stack it is possible to obtain useful extinction ratios. The s-polarization is more than 99% reflected while the p-polarization can be suppressed in the reflected beam and become 95% transmitted. Thin film polarizers can be optimized for a particular wavelength to give superior performance for laser applications.
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Thin Film Plate Polarizers and Dichroic Beamsplitters
Thin-film plate polarizers utilize our advanced ion-beam-sputtered (IBS) coating technology to achieve high-power performance and guaranteed transmission at a specific angle of incidence, with no angle tuning required. By combining durable dielectric coatings with fused silica substrates, we produce robust optical components that are stable, easy to align and exhibit high laser damage thresholds in both reflection and transmission.
High energy plate polarizers separate s and p polarizations with an extinction ratio (Tp/Ts) of greater than 750 to 1000:1 in the transmitted beam. Thus, they are ideal for intracavity or extracavity high-power applications where fluences are greater than 500 mJ/cm2 and calcite or cemented cube polarizers cannot be used.
Among the many diverse custom optical components that PPC offers are diode-pumped Nd:YAG resonator mirrors, 50/50 non-polarizing beamsplitters and thin-film plate polarizing beamsplitters. For all the optical components we provide, we use only ion-beam-sputtered (IBS) coatings. The IBS coating process is both accurate and repeatable, resulting in precision coatings that are easy to clean, chemically resistant and insensitive to moisture and other environmental factors.
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Plate Beam Splitters
Round 4mm to 500mm
Square 4mm to 350mm
R/T Ratio: +/- 5%
Surface Quality: up to 20-10
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The 50% / 50% visible Cube Beamsplitter consists of two cemented right angle prisms. One prism is coated on the hypotenuse to provide a coating that will reflect and transmit the incident light. The coating shows minimum sensitivity to variations in angles of incident and polarizations as compared to plate beamsplitters. The cube beamsplitter generally enables the optical system to have greater resolution than is possible with a plate type beamsplitter since asymmetrical optical aberrations are eliminated. The Cube Beamsplitter is also available in any split between reflection and transmission on special order.
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Thin Film Plate Polarizers
Wide acceptance angle and no angle tuning required
45° design separates transmitted and reflected beams by 90°
Brewster-angle design separates polarizations with < 1000:1 extinction ratio
RoHs Compliant
These thin-film plate polarizers utilize our advanced ion-beam-sputtered (IBS) coating technology to achieve high-power performance and guaranteed transmission at a specific angle of incidence, with no angle tuning required. By combining durable dielectric coatings with fused silica substrates, we produce robust optical components that are stable, easy to align and exhibit high laser damage thresholds in both reflection and transmission.
High energy plate polarizers separate s and p polarizations with an extinction ratio (Tp/Ts) of greater than 750 to 1000:1 in the transmitted beam. Thus, they are ideal for intracavity or extracavity high-power applications where fluences are greater than 500 mJ/cm2 and calcite or cemented cube polarizers cannot be used.
For other wavelengths throughout the visible and near-IR (including Nd:YAG and fiber-laser wavelengths), substrate sizes or angles of incidence, please contact us.
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REO's thin film polarizing beamsplitters offer industry leading performance created to the highest standards of quality and verified by state of the art functional metrology. Our high energy Ion Beam Sputtering coating process along with our proprietary adhesive-free bonding process insure that our beamsplitters will exceed all Telcordia requirements for durability and reliability.With the best extinction and bandwidth specifications in the industry, REO's polarizing beamsplitters are ideal for demanding polarization diversity applications such as interleavers, switches, circulators, and isolators. REO offers these polarizers in single hypotenuse versions, with right angle deviation between s and p output beams, or double hypotenuse versions, with parallel output beams. They feature the high power handling capability necessary for pump combination applications, and can be customized to match the most demanding requirements for size and cost. REO's beamsplitters can be integrated with our etalons or prisms using our adhesive-free bonding process to make assemblies that provide a precision drop-in optical solution that reduces costly assembly and alignment time
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Thin Film Polarizers (TFPs) can split a laser beam into two parts with orthogonal polarizations. Conversely, TFPs can be used to combine two beams with orthogonal polarizations. TFPs consist of a coated plate, which is oriented at Brewster’s angle with respect to the incoming beam. The thin-film coating serves to enhance the beam’s s-polarized reflectivity, while maintaining the p-polarized component’s high transmission.
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In addition to 1” diameter half-wave and quarter-wave retardation plates, PPC also stocks 4” diameter compound zero order waveplate wafers. These large retarders can be sold as-is, core-drilled or diced to almost any size or shape in just a day or two, and they are already coated with our high energy, low loss ion beam sputtered (IBS) anti-reflection coatings.
PPC uses laser-grade crystal quartz to produce multiple-order,
true zero-order and compound zero-order waveplates with retardations
of quarter-wave, half-wave or anything in-between.
Multiple-order retarders are ideal for narrow- or single-wavelength
applications at a specific operating temperature. For increased
bandwidth and thermal stability, zero-order waveplates
are recommended.
For compound zero-order waveplates and multi-element waveplate
assemblies, we use durable IBS coatings and our proprietary
epoxy-free bonding technology—Chemically Activated Direct
Bonding™ (CADB). This unique combination of processes results in
precise, high-energy components that exhibit environmental stability
and improved transmitted wavefront characteristics.
Waveplates are available as standalone components, or as part of
a more complex optical assembly. PPC manufactures custom crystal quartz and sapphire waveplates and multi-element polarization assemblies from 1 mm to 1" for research, semi, biomedical and aerospace applications.
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Waveplates use a phenomenon known as birefringence to alter the incoming laser beam polarization state. The most common waveplate uses are for turning linearly polarized light into circularly polarized light (quarter-wave plates), and to rotate the polarization plane of a linearly polarized source (half-wave plates).
II-VI manufactures both multiple order and zero order waveplates. Zero order waveplates have the dual advantage of being less sensitive to changes in operating temperature and input wavelength.
Applications
* Converting linear to circular polarization
* Rotating the polarization plane
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An Achromatic Waveplate, AWP, is made one piece of Crystal Quartz and one piece of Magnesium Fluoride, MgF2. These materials are birefringent and by matching of the birefringent changes in one material with those of the second, retardation changes are minimized as the wavelength changes. This produces a waveplate whose change in retardation is small for large variations in wavelength.
The AWP’s are available for three wavelength ranges: VIS (465-610nm), NIR (700-1000nm) and IR (1200-1650nm).
Specifications
Substrate Material: Crystal Quartz & MgF2
Retardance: l/4 and l/2
Retardation Tolerance: l/100 over wavelength range
Clear Aperture: 11.5mm
Temp Coefficient of Retardation:
Wavelength ranges(nm): 465-610, 700-1000, 1200-1650
Transmitted Wavefront distortion: l/4@633nm
Surface Quality: 20/10 scratch dig
Parallelism: <1 arc min
AOI range for < 1% change in Retardance: +/-3°
Optical Axis: Marked on the mounting ring
Diameter Mounted: 25.4 mm
Thickness: 9mm
Coating: Ravg<1% at 465-610nm per surface
Ravg<0.6% at 700-1000nm per surface
Ravg<0.5% at 1200-1650nm per surface
Style: Airspaced
AO12A-¼-X, or, AO12A-½-X $695.00
X = 1 for 465-610nm,
X = 2 for 700-1000nm,
X = 3 for 1200-1650nm
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These retarder plates are made from quartz for 1/4 and 1/2 first order. The plates are suitable for low power and high power applications.
* Retarder Plates - Multiple Orders
* Retarder Plates - Zero Order
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Polarizers, Waveplates, Beamsplitters
