Optical Sciences

Biomolecules and nanostructures

The Optical Sciences group studies the interaction of light and matter. Our current focus is on detection and sensing/imaging with an emphasis on the development of integrated photonics. We are part of Twente University's Department of Science and Technology and member of the MESA+ institute.


High bit rate on-chip nanoamplifiers in Er3+ doped double tungstate

  • Sonia GarcĂ­a Blanco - Scientific Staff
  • Jinfeng Mu - PhD student
  • Mustafa Akin Sefunc - Former member

  • The aim of this project is to develop Er3+ doped photonic wire amplifiers integrated on two of the most promising passive generic integration platforms currently proposed for very large photonic integration, TriPleXTM and silicon-on-insulator (SOI). The material proposed for the amplifier is a potassium double tungstate doped with erbium ions. The high absorption and emission cross-sections of erbium ions in this host material, together with a potentially high erbium concentration and the very high electromagnetic field confinement in the small waveguide cross-section of the photonic wires will enhance the achievable gain per unit length. The amplifiers will be integrated onto TriPleXTM and SOI photonic motherboards.
    Bonding and transfer techniques will be developed in this project to permit the transfer of a thin layer of amplifier material onto a passive photonic substrate. This thin layer will then be used to fabricate the photonic wire amplifiers. Low loss coupling schemes to bring both the optical pump and signal to the on-chip amplifier will be developed. High-speed amplification (>Tbps) on a photonic wire amplifier providing a total gain similar to a typical EDFA (10-20 dB), very low noise figure, at a device length of merely a few millimeters and consuming 2-3 mW of pump power will be demonstrated. The proposed amplifiers will constitute a very important milestone towards the practical utilization of photonics in on-chip optical networks.

    Er<sup>3+</sup> doped KYW amplifier onto a passive nanophotonic circuit   proposed photonic wire structure with input/output dielectric waveguides

    Fig. 1| (a) Er3+ doped KYW amplifier onto a passive nanophotonic circuit; (b) proposed photonic wire structure with input/output dielectric waveguides.


    The following articles have been published regarding this project:

    Low-Loss Highly Tolerant Flip-Chip Couplers for Hybrid Integration of Si3N4 and Polymer Waveguides

    (abstract) (full pdf)
    Jinfeng Mu, Theonitsa Alexoudi, Yean-Sheng Yong, Sergio A. Vázquez-Córdova, Meindert Dijkstra, Kerstin Wörhoff, Jeroen Duis, and Sonia M. García-Blanco
    IEEE Photonics Technology Letters
    vol. 28, issue 23, december 1, 2016

    A Low-Loss and Broadband MMI-Based Multi/Demultiplexer in Si3N4 / SiO2 Technology

    (abstract) (full pdf)
    Jinfeng Mu, Sergio A. Vázquez-Córdova, Mustafa Akin Sefunc, Yean-Sheng Yong, and Sonia M. García-Blanco
    Journal of Lightwave Technology
    vol 34, issue 15, aug. 1, 2016

    Design and fabrication of adiabatic vertical couplers for hybrid integration by flip-chip bonding

    (abstract) (full pdf)
    Jinfeng Mu, Mustafa A. Sefunc, Bojian Xu, Meindert Dijkstra, Sonia M. García-Blanco
    SPIE Proceedings vol 9750, Integrated Optics: Devices, Materials, and Technologies XX
    975012 March 1, 2016
    Printable version