Study of cross coupling in transition bends using cascaded coupler segment method

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 do...

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Bibliographic Details
Published in:IEEE photonics technology letters 1994-08, Vol.6 (8), p.1004-1007
Main Authors: Bhatnagar, A., Nair, K.R.S., Kumar, R., Chalapati, K., Patro, Y.G.K.
Format: Article
Language:English
Subjects:
Applied sciences
Circuit properties
Directional couplers
Electric, optical and optoelectronic circuits
Electronics
Equations
Exact sciences and technology
Integrated optics
Miscellaneous
Optical and optoelectronic circuits
Optical coupling
Optical devices
Optical interconnections
Optical waveguide components
Optical waveguides
Power system interconnection
Waveguide transitions
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Summary: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.< >
ISSN:1041-1135
1941-0174
DOI:10.1109/68.313077