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Optica Applicata

Tytuł artykułu

Improving the self-imaging in multimode interference (MMI) couplers

Autorzy Yin, R. 
Treść / Zawartość
Warianty tytułu
Języki publikacji EN
EN A new structure is firstly proposed to be used as the multimode interference (MMI) region in this paper. For comparison with conventional MMI region, two extra layers with thin thickness and lower index beside the core layer are introduced to increase the difference of propagation constant between the first two modes. Meanwhile, high order modes are not affected so much. Thus the propagation constant errors of the guided modes are decreased and better self-imaging is realized. The designing process is also given in this paper. This new structure can be applied to any kind of M×N MMI couplers. By incorporating this new structure, an MMI based power splitter is 1/6 shorter and contrast of MMI optical switch is 10 dB higher according to the results of exact mode analysis.
Słowa kluczowe
EN integrated optics   multimode interference (MMI)   self-imaging  
Wydawca Oficyna Wydawnicza Politechniki Wrocławskiej
Czasopismo Optica Applicata
Rocznik 2011
Tom Vol. 41, nr 3
Strony 679--685
Opis fizyczny Bibliogr. 8 poz.
autor Yin, R.
  • College of Information Science and Engineering, Shandong University, Jinan, Shandong, China 250100
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[2] LAI Q., HUNZIKER W., MELCHIOR H., Low-power compact 2×2 thermooptic silica-on-silicon waveguide switch with fast response, IEEE Photonics Technology Letters 10(5), 1998, pp. 681–683.
[3] PAIAM M.R., MACDONALD R.I., Polarisation-insensitive 980/1550 nm wavelength (de)multiplexer using MMI couplers, Electronics Letters 33(14), 1997, pp. 1219–1220.
[4] LORENZO R.M., LLORENTE C., ABRIL E.J., LOPEZ M., Improved self-imaging characteristics in 1×N multimode couplers, IEE Proceedings Optoelectronics 145(1), 1998, pp. 65–69.
[5] HUANG J.Z., SCARMOZZINO R., OSGOOD R.M., A new design approach to large input/output-number multimode interference couplers and its application to low-crosstalk WDM routers, IEEE Photonics Technology Letters 10(9), 1998, pp. 1292–1294.
[6] YIN R., YANG J., JIANG X., LI J., WANG M., Improved approach to low-loss and high-uniformity MMI devices, Optics Communications 181(4–6), 2000, pp. 317–321.
[7] YIN R., JIANG X., YANG J., WANG M., Structure with improved self-imaging in its graded-index multimode interference region, Journal of the Optical Society of America B 19(6), 2002, pp. 1301–1303.
[8] THOEN E.R., MOLTER L.A., DONNELLY J.P., Exact modal analysis and optimization of N×N×1 casaded waveguide structures with multimode guiding sections, IEEE Journal of Quantum Electronics 33(8), 1997, pp. 1299–1307.
Kolekcja BazTech
Identyfikator YADDA bwmeta1.element.baztech-article-BPW7-0018-0047