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Yttrium alumate (YVO4) is an excellent birefringent crystal material, which is a negative uniaxial crystal. The crystal has good physical and mechanical properties, wide light transmission range, high transmittance, large birefringence coefficient and easy processing. YVO4 crystal can replace ice SPAR and crystal red stone in the field of optical fiber communication, is the key material in optical communication passive devices such as optical isolators, circulators, polarization splitters, polarizers.
Caicite Crystal is a kind of natural birefringent material, in the shape of diamond, birefringence coefficient is large, through the spectrum is wide, from visible to near infrared has relatively good optical properties. Although the mechanical strength of Iceland SPAR material is soft and easy to scratch, it still does not affect its wide application in polarization devices. Caicite is mainly used in Glan POLARIZER.
LiNbO3 is widely used in optical fiber communication as a birefringent crystal. The crystal has good physical and mechanical properties, wide light transmission range, high transmittance, easy processing, and lower material cost than other materials. Lithium niobate crystals are widely used in passive optical communication devices such as optical isolators, circulators, polarization splitters, polarizers, etc
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Window
Wedge window is a kind of optical prism with inclined bevel, which is mainly used in the optical field to control the optical drift. The Angle of both sides of the wedge Angle is relatively small. It can make the light path to the thicker side of the deflection, if only one wedge window can be used to offset the incident light path at a certain Angle, two wedge window pieces can be used as a deformation mirror, mainly used to correct the laser beam. The wedge window is an ideal optical path adjustment device in the optical field. Two rotating wedge Windows can adjust the direction of the outgoing beam within a certain range (10°). Used in infrared imaging or monitoring, telemetry or infrared spectroscope and other optical systems.
The Output Coupler is also called a Partial Mirror, which can reflect part of the total energy of the laser back to the resonator, and let the other part of the energy transmitted for processing. In industrial lasers, the output mirror is mainly used to ensure the laser power and output mode in the laser resonator.
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