Integrated photonic beamformer employing continuously tunable ring resonator-based delays in CMOS-compatible LPCVD waveguide technology

C.G.H. Roeloffzen, Arjan Meijerink, L. Zhuang, Rene Heideman, Arne Leinse, M. Hoekman, Wim van Etten

    Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

    2 Citations (Scopus)
    1 Downloads (Pure)


    In this paper a novel CW laser-compatible, squint-free, continuously tunable ring resonator-based optical beamformer mechanism for a phased array receiver system is proposed and partly demonstrated. When the optical delay elements and optical signal processing circuitry are integrated on a chip, a single-chip optical beam forming network (OBFN) is obtained. The optical delay elements are ideally continuously tunable to achieve continuous control of the beam direction, and should have a flat delay and magnitude response over the signal band, to avoid distortion. In the proposed system architecture, filter-based optical single-sideband suppressed-carrier modulation and balanced coherent optical detection are used. Such architecture has significant advantages over a straightforward architecture using optical intensity modulation and direct optical detection, namely reduced complexity of the OBFN chip, and enhanced dynamic range. Measurements on an actual 1×8 OBFN chip and an optical sideband filter chip are presented. Both are realized in CMOS-compatible planar optical waveguide technology (TriPleX).
    Original languageEnglish
    Title of host publicationOptoelectronic Materials and Devices III
    Subtitle of host publication27–30 October 2008, Hangzhou, China
    EditorsYi Luo, Jens Buus, Fumio Koyama, Yu-Hwa Lo
    Place of PublicationBeijing
    Number of pages11
    ISBN (Print)9780819473752
    Publication statusPublished - 18 Nov 2008
    EventAsia-Pacific Optical Communications Conference, SPIE APOC 2008 - Zhejiang World Trade International Exhibition Center, Hangzhou, China
    Duration: 27 Oct 200830 Oct 2008

    Publication series

    NameProceedings of Spie
    ISSN (Print)0277-786X


    ConferenceAsia-Pacific Optical Communications Conference, SPIE APOC 2008
    Abbreviated titleSPIE APOC


    • METIS-252136
    • IR-62570
    • EWI-14260
    • Beam forming
    • CMOS-compatible waveguide technology
    • optical beam forming network (OBFN)
    • optical ring resonator (ORR)
    • phased array antenna


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