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

Volume

16

Issue

5

fYear

1998

fDate

5/1/1998 12:00:00 AM

Firstpage

818

Lastpage

823

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;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/50.669010

Filename

669010