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Multimode interference couplers for the conversion and combining of zero- and first-order modes

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5 Author(s)
Leuthold, J. ; Inst. for Quantum Electron., Swiss Fed. Inst. of Technol., Zurich, Switzerland ; Eckner, J. ; Gamper, E. ; Besse, P.A.
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Optical waveguide mode-combiners for fundamental and first-order modes, based on multimode interference (MMI) couplers are presented. These devices convert a fundamental mode into a transversal first-order mode and combine it in lossless fashion with a second fundamental mode. They can separate zero- and first-order modes in a common waveguide and allow the splitting and combining of zero- and first-order modes with nonuniform power splitting ratios. Realizations in InGaAsP-InP are demonstrated. These new components have successfully been integrated into all-optical switches and were found to have advantageous characteristics in all-optical devices

Published in:

Lightwave Technology, Journal of  (Volume:16 ,  Issue: 7 )

Date of Publication:

Jul 1998

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