Showing papers by "Leimeng Zhuang published in 2009"
12 Feb 2009
TL;DR: TriPleXTM waveguide as mentioned in this paper is a low-loss integrated optical waveguide structure as CMOS-compatible industrial standard for photonic integration on silicon or glass, which is basically formed by a rectangular silicon nitride (Si3N4) shell filled with and encapsulated by silicon dioxide (SiO2).
Abstract: We present a new class of low-loss integrated optical waveguide structures as CMOS-compatible industrial standard for photonic integration on silicon or glass. A TriPleXTM waveguide is basically formed by a -preferably rectangular- silicon nitride (Si3N4) shell filled with and encapsulated by silicon dioxide (SiO2). The constituent materials are low-cost stoichiometric LPVCD end products which are very stable in time. Modal characteristics, birefringence, footprint size and insertion loss are controlled by design of the geometry. Several examples of new applications will be presented to demonstrate its high potential for large-scale integrated optical circuits for telecommunications, sensing and visible light applications.
44 citations
07 Mar 2009
TL;DR: In this paper, the authors describe the development of a prototype 8x1 optical beam forming network using cascades of optical ring resonators as part of a breadboard Ku-band phased array antenna.
Abstract: For enhanced communication on board aircraft, novel antenna systems with broadband satellite-based capabilities are required. The technology will enhance airline operations by providing in-flight connectivity for flight crew information and will bring live TV and high-speed Internet connectivity to passengers. The installation of such systems on board aircraft requires for aerodynamic reasons the development a very low-profile aircraft antenna, which can point to satellites anywhere in the upper hemisphere. Major keystones for the success of steerable low-profile antennas are multi-layer printed circuit boards (PCBs) with an array of broadband antenna elements, and compact micro-wave systems with appropriate beam steering capabilities. The present paper describes the development of a prototype 8x1 optical beam forming network using cascades of optical ring resonators as part of a breadboard Ku-band phased array antenna.
26 citations
08 Oct 2009
TL;DR: In this paper, an optical phase synchronization system using a power feedback loop technique is experimentally demonstrated, which allows coherent combining of signals modulated on the same optical carrier in a hybrid optical beam forming system setup.
Abstract: An optical phase synchronization system using a power feedback loop technique is experimentally demonstrated. The system allows coherent combining of signals modulated on the same optical carrier in a hybrid optical beam forming system setup.
9 citations
Proceedings Article•
01 Dec 2009TL;DR: In this article, a ring resonator-based photonic beamforming network (OBFN) was developed for continuous and squint-free control of the reception angle of broadband phased array antenna systems.
Abstract: A novel ring resonator-based photonic beamformer has been developed for continuous and squint-free control of the reception angle of broadband phased array antenna systems. The core of the system is a ring resonator-based optical beamforming network (OBFN) used for delay synchronization and coherent signal combining. The OBFN is integrated in a single chip realized in CMOS-compatible optical waveguide technology together with an optical sideband filter for singlesideband suppressed-carrier modulation, and an optical carrier reinsertion circuit for balanced coherent detection. This paper demonstrates the system functionality by RF-to-RF measurements of the phase and power responses of the integrated OBFN.
4 citations