What Does Birefringent Crystal Mean?
What Does Birefringent Crystal Mean?
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各向异性透明晶体如方解石、石英等的折射率，是其固有的特性，称为永久双折射。
Equally, the polarization state of a laser beam in a very laser crystal with thermally induced birefringence is distorted. The kind of distortion will depend on the place, since the birefringent axis includes a different (e.
The birefringence of nonlinear crystal components permits birefringent period matching of nonlinear interactions. Effectively, this means that birefringence compensates the wavelength dependence from the refractive index.
The optical route variation is really a classical optical notion connected to birefringence, and both equally are outlined with the relative stage shift involving the regular and remarkable rays because they emerge from an anisotropic content. Generally speaking, the optical path variation is computed by multiplying the specimen thickness by the refractive index, but only once the medium is homogeneous and isn't going to include sizeable refractive index deviations or gradients.
polarization. Circular birefringence is often induced by a magnetic field; This can be known as the Faraday outcome. See the post on optical activity for information.
In laser technologies and nonlinear optics, the phenomenon of birefringence occurs generally in the context of non-isotropic crystals:
Figure 7 illustrates a birefringent (anisotropic) crystal positioned among two polarizers whose vibration Instructions are oriented perpendicular to one another (and lying in Instructions indicated because of the arrows close to the polarizer and analyzer labels).
Observe that these axes are perpendicular to each other. The crystal optical axis, that makes an equal angle (103 degrees) with all three crystal faces joined in the corner, is usually indicated with the reduce percentage of the crystal. The degree of birefringence in calcite is so pronounced that the photographs from the letter A fashioned through the everyday and remarkable rays are completely separated. This higher volume of birefringence is just not observed in all anisotropic click here crystals.
光纤和其它波导中，采用有效折射率差值描述更好。这与传播常数虚部的差值直接相关。
双折射现象的明显例子是方解石。透过方解石的菱面体就可以看到明显重影。
Conversely, the slowest wavefronts arise when the wave travels together the brief axis of your ellipsoid. This axis is termed the sluggish axis. Between both of these extremes, wavefronts touring in other directions experience a gradient of refractive index, and that is dependent upon orientation, and propagate with velocities of intermediate values.
这一效应可应用于双折射调谐器中，因为它是与波长相关的（尽管折射率差与波长无关）。该效应通过自相位调制和交叉相位调制而与功率相关（参阅非线性偏振态旋转），有时用于光纤激光器中的被动锁模。
Lots of microscope makers take advantage of this sensitivity by giving an entire-wave retardation plate or initially-get red compensator with their polarizing microscopes to help scientists in analyzing the Attributes of birefringent elements.
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No, that has nothing to carry out with optical nonlinearities. It only signifies that the refractive index turns into dependent on the spatial course.