Patent ID: 6418255
Filing Date: 2002-07-09
Classification: B82Y,G02F

Abstract:
A device for modulation of optical radiation and transmission of information based on Faraday effect, containing optically connected magneto-optical element, transmitting optical radiation, and a separator of waves having different polarizations, thereto said magneto-optical element comprises an optical element, made from magneto-optical material and means, creating variable magnetic field in said optical element,CHARACTERIZED in that it additionally contains a nonlinear-optical element, mounted between said magneto-optical element and said separator of waves of different polarizations, thereto said nonlinear-optical element is made with possibility of propagation in it at least two unidirectional distributively coupled waves of different polarizations, thereto the nonlinear coefficient of said nonlinear-optical element is larger than the threshold nonlinear coefficient, thereto a length of the nonlinear-optical element is not less than the length, which is necessary for switching or transfer at least 10% of a power from one said unidirectional distributively coupled waves to another unidirectional distributively coupled wave with different polarization, thereto the length of the nonlinear-optical element, which is necessary for switching or transfer at least 10% of a power of one of said unidirectional distributively coupled waves to another unidirectional distributively coupled wave with different polarization, does not exceed the length at which a power of the most attenuated wave, from the unidirectional distributively coupled waves of different polarizations, is attenuated by a factor 20 or less.