Nonreciprocal TE-TM mode conversion based on photonic crystal fibre of air-holes filled with magnetic fluids into a terbium gallium garnet fibre

摘要: The nonreciprocal optical effect of Faraday rotation (FR) is widely exploited in isolators to suppress back-reflections protect sources and other devices from injection noise, or circulators route counter-propagating signals a single physical channel different ports [1]. first concept an integrated isolator was based on TE-TM mode conversion. However, most proposals the waveguide type are conversion [2], coupling between these modes caused by FR if magnetization aligned along z-axis, parallel propagation. can be used for magnet sensors, because Verdet constant silica fibre small (∼1.1 rad/(T.m) at 1064 nm) [3]. In this work, we propose study phenomenon, simulation magneto photonic crystal (MPCF). It consists periodic triangular lattice air-holes filled with magnetic fluids (Fe 3 O 4 ) into Terbium Gallium Garnet (TGG) which kind synthetic garnet chemical composition Tb Ga 5 12 . This chosen as rotator material has excellent transparency properties very resistant laser damage. TGG also high results effect. We simulated influence gyrotropy wavelength, calculated modal birefringence. MPCF fibre, light guided internal total reflection, like classical fibres. it shown that they could function much stronger than conventional