Abstract
Crystal growth of Cd 1− x Mn x Te ( x > 0.4) with giant Faraday rotation has been studied for applications as fiber-optic magnetic field sensors. These crystals contain two types of inclusions: large-sized (>10 μm) manganese oxide and small-sized (<2 μm) manganese telluride. Both inclusions decreased with purification of the Mn metal surface and optimisation of growth conditions. As a result, single crystals with low extinction ratio ( <10 −4) and transmission loss ( < 0.45 dB/mm) at 660 nm were obtained.
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