Title :
Improved design of magnetooptic rib waveguides for optical isolators
Author :
Bahlmann, Norbert ; Chandrasekhara, Vasu ; Erdmann, Andreas ; Gerhardt, Reinald ; Hertel, Peter ; Lehmann, Ralf ; Salz, Dirk ; Schröteler, Franz-Josef ; Wallenhorst, Michael ; Dotsch, Horst
Author_Institution :
Dept. of Phys., Osnabruck Univ., Germany
fDate :
5/1/1998 12:00:00 AM
Abstract :
Garnet films of the following compositions (Lu,Bi)3(Fe,Ga,Al)5O12 and (Tm,Bi)3(Fe,Ga)5O12 are grown by liquid-phase epitaxy on [111]-oriented substrates of gadolinium gallium garnet. Double layers with opposite signs of Faraday rotation and single layers are prepared. Optical monomode rib waveguides are realized using such films. The nonreciprocal phase shift of the fundamental TM-mode is studied both theoretically and experimentally at a wavelength of 1.3 μm. The maximum nonreciprocal effect of double layer films is about 1.7 times larger than that of similar single layer waveguides. Agreement between experiments and calculations is excellent
Keywords :
Faraday effect; bismuth compounds; garnets; liquid phase epitaxial growth; lutetium compounds; magneto-optical isolators; optical communication equipment; optical design techniques; optical rotation; optical waveguides; rib waveguides; (Lu,Bi)3(Fe,Ga,Al)5O12; (LuBi)3(FeGaAl)5O12; (Tm,Bi)3(Fe,Ga)5O12; (TmBi)3(FeGa)5O12; 1.3 mum; Faraday rotation; [111]-oriented substrates; double layer films; double layers; fundamental TM-mode; gadolinium gallium garnet; garnet films; liquid-phase epitaxy; magnetooptic rib waveguide design; maximum nonreciprocal effect; nonreciprocal phase shift; opposite signs; optical isolators; optical monomode rib waveguides; single layers; Equations; Integrated optics; Isolators; Magnetooptic effects; Optical design; Optical films; Optical refraction; Optical variables control; Optical waveguide theory; Optical waveguides;
Journal_Title :
Lightwave Technology, Journal of
