Series Classification
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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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Phase Delay
The multi-order waveplate (Lower waveplate) is composed of a single quartz or MgF2 crystal, through which the optical path difference of the crystal O light and E light is different, so as to obtain the required phase delay. Compared with zero-order wave plate, low-order waveplate has simple structure and lower cost, and is suitable for large batch industrial occasions. Due to the monolithic structure, it has a relatively high damage threshold.
Multi -wavelength waveplates are made of single quartz crystals or MgF2 crystals, which can provide phase delays of quarter or half of different wavelengths, and can also be customized with any delay according to customer requirements. Commonly used in solid-state frequency doubling lasers to improve laser conversion efficiency.A multi-wavelength waveplate is a special type of multi-order waveplate that can obtain the desired phase delay by fitting the refractive index at different wavelengths, but this phase delay is generally multi-order.
The Rotation plate is made of quartz crystal. Quartz crystals are naturally optically active, so they can be used to rotate the polarization direction of linearly polarized light without changing the properties of linearly polarized light. The Angle of rotation is related to the thickness of the crystal, and the rotation direction is currently available in left and right rotation.
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