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

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Roeloffzen, C.G.H. and Meijerink, A. and Zhuang, L. and Heideman, R.G. and Leinse, A. and Hoekman, M. and Etten van, W.C. (2008) Integrated photonic beamformer employing continuously tunable ring resonator-based delays in CMOS-compatible LPCVD waveguide technology. In: SPIE APOC Asia-Pacific Optical Communications, 26-30 Oct 2008, Hangzhou, China.

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Abstract: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).
Item Type:Conference or Workshop Item
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Electrical Engineering, Mathematics and Computer Science (EEMCS)
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Link to this item:http://purl.utwente.nl/publications/62570
Official URL:http://dx.doi.org/10.1117/12.803719
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