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CoupletechCo.Ltd.

CoupletechCo.Ltd.
location Jinan, China

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Our Products

  1. Laser Crystal 25 Products available
  2. Optical Element 22 Products available
  3. Nolinear Optical Crystal 17 Products available
  4. Pockels Cell 14 Products available
  5. Polarizing Optic 12 Products available
  6. Diode Pumped Pulsed 3 Products available
  7. Pockels Cell Driver 3 Products available
  8. Mirror / Crystal Mount 2 Products available
  9. Diode Pumped CW 1 Products available
  10. Accessories 1 Products available

Polarizing Optic

We are manufacturer of Polarization Rotator in China, if you want to buy Polarizing Opic, Polarizing Filter, Circular Polarizer Filter, please contact us.

Optical Isolator

Optical isolator is a combination of a polarization Beam splitter cube ( PBS ) and a quarter wave plate made of crystal quartz. Incident light is linearly polarized by PBS and converted to circular polarization by the quarter wave plate, it only allows light to travel in one direction. If any portion of the emerging beam is reflected back into the isolator, the quarter wave plate will convert the reflected beam into a linearly polarized beam which is perpendicular to the input beam. This beam is then blocked by PBS and it will not return to the input side of the system. An optical isolator is an optical component which allows the transmission of light in only one direction. It is typically used to prevent unwanted feedback into an optical oscillator, such as a laser cavity. It is a block optical feedback, with passive isolation of linearly polarized light, it has high isolation.
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Glan Thompson Polarizer Calcite

Glan Thompson polarizer ismade of two calcite prisms or a -BBO prisms cemented together. Two types ofGlan Thompsons are available. One is the standard form and the other is thelong form. Their length to aperture ratios are 2.5 : 1 and 3.0 : 1respectively. Glan Thompsons tend to have higher extinction ratio than airspaced polarizers. In the ultra violet spectrum, their transmission is limitedby absorption in birefriengent materials as well as the cement layer. a -BBOpolarizers and Calcite polarizers can be used from about 220 to 900nm and 350to 2300 nm respectively.The polarizers have the widest field angle of any design. Thestandard form of this polarizer with 2.5:1 length to aperture ratio has a fullacceptance cone angle of more than 15 @ 589nm, symmetric about the inputaxis, whilst the long form with 3:1 ratio has a field angle >26 . Gran Thompson polarizer is characterized by wide field Angle bonding, suitable for low-power applications and high polarization purity.
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Polarizing Plate Beam Splitter

Polarizing Plate Beam Splitter is including 45 degree Polarizing Plate Beamsplitter with UV Fused Silica and 56.3 degree Polarizing Plate Beamsplitter with BK7 material or UV Fused Silica. The front surface of Coupletechs' Polarizing Plate Beamsplitter has anarrow band splitter that is used for a variety of laser wavelengths. And needto Brewster Angle 56.3 degree of incidence of the traditional polarization splittingdifferent lens, or the optical components requires a 45 Angle of incidence, andtherefore easier to install. Although the Angle can be adjusted, this canresult in the reduction of the achievable extinction ratio. Polarizing Plate Beamsplitter is composed ofultraviolet quartz glass or BK7 Material. These beam splitter mirrors the s polarized light at a 45 degree Angle, ppolarized light transmission. Beam, in fact, these points can be regarded as 45 high reflector, the two reflection band to compensate each other, makes thehigh p polarization component, s high polarization component reverse at thesame time. As well as 56.3 degree. The hard coating on the polarizable plate splitter has a higher damagethreshold than the ordinary coating. For applications requiring high extinctionratio, high transmittance and high damage threshold, these splitter mirrors aremore suitable than polarized beam cubes. Thecharacteristics of polarizing spectroscope are separated from beam and P beam, and the Angle of brewster Angle is applied to high power applications.
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Rochon Prism Polarizer Quartz

Rochon polarizer is made of two birefringent material prisms cementedtogether. Both ordinary and extraordinary beams propagate collinearly down theoptic axis in the first prism under the ordinary refractive index. Uponentering the second prism the ordinary beam experiences the same refractiveindex and continues undeviated. The extra-ordinary beam, however, now has alower refractive index and is refracted at the interface. The angle ofrefraction is further increased at the birefringent materialair exit surface. Anyseparation angle can be designed for specific wavelength upon customer's requests. The feature of Rochon polarizer is light glue, and it is suitable for medium and high power laser, the wavelength bandwidth coverage is visible and mid-infrared, in the time, the Rochon Polarizer Prism is higher degree of polarization than other kind of Polarizers.Rochon Prism Polarizers is made of Quartz, A-BBO, Calcite and YVO4 crystal.
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Wollaston Prism Polarizers Quartz

Wollaston Prism Polarizer is made of two birefringent material prisms thatare cemented together. The deviations of the ordinary and extraordinary beamsare nearly symmetrical about the input beam axis, so that Wollaston polarizingbeam splitter has approximately twice the deviation of the Rochon. Theseparation angle exhibits chromatic dispersion, as shown in the blow. Anyseparation angle can be designed upon the requirement. The separation angle ofstandard products versus wavelength is shown in the plot below. Wollaston Polarizer has advantages of very wide wavelength range, low power application, broadband 10000 : 1 extinctionratio, both ordinary andextraordinary beams are deviated, besides, it suits for lowpower application and where the large deviation is required.
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