Here, we propose to use the interference pattern which arises from the superposition of two coherent free space tilted beams at the input facet of an optical waveguide to excite selectively a given optical mode. By tuning the period of the interference fringes, it is possible to select the excited mode in the waveguide by maximizing the overlap integral with the modal optical field. Our setup is based on a free space interferometer that is theoretically capable of selectively exciting higher order modes in a micron-sized waveguide with an average cross-talk of 37 dB and a mode selectivity higher than 90%. The system is easily reconfigurable and can be straightforwardly integrated on a chip to enhance miniaturization, compactness, and stability. Published by AIP Publishing.

Oblique beams interference for mode selection in multimode silicon waveguides / Signorini, Stefano; Borghi, Massimo; Mancinelli, Mattia; Bernard, Martino; Ghulinyan, Mher; Pucker, Georg; Pavesi, Lorenzo. - In: JOURNAL OF APPLIED PHYSICS. - ISSN 1089-7550. - 2017, 122:11(2017), pp. 113106.1-113106.7. [10.1063/1.5003252]

Oblique beams interference for mode selection in multimode silicon waveguides

Signorini, Stefano;Borghi, Massimo;Mancinelli, Mattia;Bernard, Martino;Ghulinyan, Mher;Pavesi, Lorenzo
2017

Abstract

Here, we propose to use the interference pattern which arises from the superposition of two coherent free space tilted beams at the input facet of an optical waveguide to excite selectively a given optical mode. By tuning the period of the interference fringes, it is possible to select the excited mode in the waveguide by maximizing the overlap integral with the modal optical field. Our setup is based on a free space interferometer that is theoretically capable of selectively exciting higher order modes in a micron-sized waveguide with an average cross-talk of 37 dB and a mode selectivity higher than 90%. The system is easily reconfigurable and can be straightforwardly integrated on a chip to enhance miniaturization, compactness, and stability. Published by AIP Publishing.
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Signorini, Stefano; Borghi, Massimo; Mancinelli, Mattia; Bernard, Martino; Ghulinyan, Mher; Pucker, Georg; Pavesi, Lorenzo
Oblique beams interference for mode selection in multimode silicon waveguides / Signorini, Stefano; Borghi, Massimo; Mancinelli, Mattia; Bernard, Martino; Ghulinyan, Mher; Pucker, Georg; Pavesi, Lorenzo. - In: JOURNAL OF APPLIED PHYSICS. - ISSN 1089-7550. - 2017, 122:11(2017), pp. 113106.1-113106.7. [10.1063/1.5003252]
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11572/192245
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