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Proceedings Paper

Integrated photonic beamformer employing continuously tunable ring resonator-based delays in CMOS-compatible LPCVD waveguide technology
Author(s): C. G. H. Roeloffzen; A. Meijerink; L. Zhuang; D. A. I. Marpaung; R. G. Heideman; A. Leinse; M. Hoekman; W. van Etten
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Paper 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).

Paper Details

Date Published: 18 November 2008
PDF: 11 pages
Proc. SPIE 7135, Optoelectronic Materials and Devices III, 71351K (18 November 2008); doi: 10.1117/12.803719
Show Author Affiliations
C. G. H. Roeloffzen, Univ. of Twente (Netherlands)
A. Meijerink, Univ. of Twente (Netherlands)
L. Zhuang, Univ. of Twente (Netherlands)
D. A. I. Marpaung, Univ. of Twente (Netherlands)
R. G. Heideman, LioniX, BV (Netherlands)
A. Leinse, LioniX, BV (Netherlands)
M. Hoekman, LioniX, BV (Netherlands)
W. van Etten, Univ. of Twente (Netherlands)

Published in SPIE Proceedings Vol. 7135:
Optoelectronic Materials and Devices III
Yi Luo; Jens Buus; Fumio Koyama; Yu-Hwa Lo, Editor(s)

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