|DOI||Resolve DOI: https://doi.org/10.1109/CLEOE-IQEC.2013.6801454|
|Author||Search for: Ortega-Monux, A.; Search for: Halir, R.; Search for: Maese-Novo, A.; Search for: Alonso-Ramos, C.; Search for: Zavargo-Peche, L.; Search for: Perez-Galacho, D.; Search for: Molina-Fernandez, I.; Search for: Wanguemert-Perez, J. G.; Search for: Cheben, P.1ORCID identifier: https://orcid.org/0000-0003-4232-9130; Search for: Schmid, J. H.1; Search for: Lapointe, J.1; Search for: Xu, D.1; Search for: Janz, S.1|
- National Research Council of Canada. Information and Communication Technologies
|Conference||2013 Conference on Lasers & Electro-Optics Europe & International Quantum Electronics Conference 2013, CLEO EUROPE/IQEC, May 12-16 2013, Munich, Germany|
|Subject||Bragg gratings; Talbot effect; integrated optoelectronics; light interference; optical couplers; refractive index|
Multimode-Interference (MMI) devices are fundamental building blocks in photonic integrated circuits, where they are used for power splitting and combining, optical switches and modulators, Mach-Zehnder interferometers and 90o hybrids for coherent optical receivers. MMIs are based on the self-image principle, by which the guided modes of the multimode region interfere to form replicas of the input field with specific amplitude and phase relations. These relations are known to depend on i) the core/cladding refractive indexes (n₁/n₂), ii) the core width (W) and length (L) of the multimode region and iii) the number, width and position of the access ports. In this work, we show that by using sub-wavelength structures within an MMI, the self-imaging properties can be significantly altered, leading to ultra-short or ultra-broadband devices.
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