Title :
Study of cross coupling in transition bends using cascaded coupler segment method
Author :
Bhatnagar, Anuj ; Nair, K. R Suresh ; Kumar, Rajender ; Chalapati, K. ; Patro, Y.G.K.
Author_Institution :
Soc. for Appl. Microwave Electron. Eng. and Res., Bombay, India
Abstract :
An analysis to find out the cross coupling of transition bend regions in integrated optic directional coupler (IODC) has been carried out using a novel method, namely the cascaded coupler segment method. A study has been conducted to see cross couplings in three types of S-bends, sine, cosine and double arc. It is seen that cosine S-bend offers the lowest cross coupling. Effect of variation in transition lengths on cross coupling is studied. It is then observed that as the transition length increases the cross coupled power also increases. Expression for equivalent interaction length in terms of transition length is derived. The results can be used to arrive at an optimum transition length and type of S-bend.<>
Keywords :
bending; directional couplers; integrated optics; optical couplers; optical waveguide theory; optical waveguides; S-bends; cascaded coupler segment method; cosine; cross coupled power; cross coupling; double arc; equivalent interaction length; integrated optic directional coupler; optimum transition length; sine; transition bends; transition lengths; Directional couplers; Equations; Integrated optics; Optical coupling; Optical devices; Optical interconnections; Optical waveguide components; Optical waveguides; Power system interconnection; Waveguide transitions;
Journal_Title :
Photonics Technology Letters, IEEE
