Optical bandwidth and fabrication tolerances of multimode interference couplers

1994/06/01 by P.A. Besse, P.-A. Besse, M. Bachmann +3 · 3 citations
Engineering · Physics and Astronomy · #Acoustic Wave Resonator Technologies #Photonic and Optical Devices #Semiconductor Quantum Structures and Devices

paper · doi:10.1109/50.296191

openalex publication_date 1994/06/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/30

Abstract

Analytical expressions are derived which relate the optical bandwidth and the fabrication tolerances of multimode interference (MMI) couplers to their most important design parameters. These expressions compare adequately with mode analysis simulations. For strong guided structures, the optical bandwidth is shown to he inversely proportional to the number of input and output ports N and to the length of the device. The fabrication tolerances are independent of N and proportional to the output channel separation D. Measurements on MMI couplers in InP/InGaAsP corroborate the theoretical predictions.>

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