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Research of a Magneto-Optical modulator system for Stokes parameters modulation

Long Renyuan Huang Chunhui Fuzhou University,College of Physics and information Engineering,Fuzhou 350108  
In this paper,by analyzing the curve characteristics of the electromagnet,a digital control constant current source design scheme which aim to make a novel magneto-optical modulator,was proposed.It works at a special zone,so that it avoids the magnetic stranded and saturation effects,and improves the speed to modulate the Stokes parametes.In the optimum range of drive current,it can ensure a linear relationship between the modulation current and the magnetic induction intensity.Compared with the traditional driver circuits,constant current source driver circuit’s modulation speed can be increased by more than 3 times,the system can be applied to a continuous variable coherent optical communication.
【Fund】: 国家自然科学基金(No.61177072)
【CateGory Index】: TN761
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