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We propose a novel technique to our knowledge to estimate the beat spectrum linewidth of a free-running heterodyning scheme using an optical discriminator. Utilizing a dense wavelength division multiplexing (DWDM) filter as an optical discriminator, the phase modulation (PM) to intensity modulation (IM) conversion is achieved. Thus converted phase noise of the laser into RIN (relative intensity noise)...
A novel optical beamformer concept is introduced that can be used for seamless control of the reception angle in broadband wireless receivers employing a large phased array antenna (PAA). The core of this beamformer is an optical beamforming network (OBFN), using ring resonator-based broadband delays, and coherent optical combining. The electro-optical conversion is performed by means of single-sideband...
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.
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...
For enhanced communication on board an 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 highspeed Internet connectivity to passengers. The installation of such systems on board an aircraft requires for aerodynamic reasons...
A broadband, continuously tunable receiver system for phased array antennas is described. It uses a ring resonator-based optical beamforming network, filter-based optical SSB-SC modulation and balanced coherent detection. The system is modeled as an equivalent RF two-port system and its performance is analyzed, identifying and modeling dominant noise and distortion sources. Numerical theoretical performance...
A novel optical beamformer system for phased array transmit antennas is proposed and experimentally demonstrated. It is based on an optical IM/DD link through a ring resonator-based optical beam forming network chip.
A novel noise reduction scheme called Balanced Modulation and Detection (BMD) is proposed. In this scheme, the modulating RF signal is half-wave rectified in the optical domain, eliminating the DC optical power resulting from pre-biasing of the optical source. A link model employing this scheme has been developed and key parameters describing link performance have been calculated. A comparison with...
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