Do you know what is the optic isolator?This is for you may be a strange concept. Never mind,as a fiber isolator manufacturer from china,we will tell you optic isolator works.
The main advantage of optical isolator Faraday effect of magneto-optic crystal. Faraday Faraday effect was first observed in 1845 does not have the optically active material in the magnetic field by rotating the polarization direction of the light occurs the substance, also known as magneto-optical effects. Polarized along the transmission direction of the magnetic field, whose direction of polarization rotation angle θ and the magnetic field strength B and the length of the material proportional to the product of L.
For normal incident signal light, after the passage to become a linearly polarized light from the polarizer, the Faraday rotating magnetic medium, together with the external magnetic field so that the right-handed polarization direction of the signal light 45, and just make a low loss through a polariser 45 placement of the analyzer. For the reverse light of the analyzer when a linearly polarized light through the medium is placed, the deflection direction is right-rotated by 45 degrees so that the polarization direction of the light and the backward direction perpendicular to the polarizer, the reflected light is completely blocked transmission .
Faraday magnetic media within 1μm ~ 2μm wavelength range usually low optical loss yttrium iron garnet (YIG) single crystal. Novel pigtail input and output optical isolators have a fairly good performance, the minimum insertion loss of about 0.5dB, isolation of 35 ~ 60dB, up to 70dB.
Through this article, I believe you have a certain understanding of the optic isolators. if you want to buy fiber optic products,you can contact us or visit:www.fiber-resources.com. More surprise and discount is waiting for you! Look forward serve for you!
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