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A particular Full-Duplex microwave photonic filter is proposed and simulated. The main goal of this work is to demonstrate that filtering effect is formed in a bi-directional way by using a single optical source. The series of simulations carried out allow establishing the optimal conditions for a practical implementation of this architecture in an optical communication system with a high degree of...
We experimentally demonstrate the generation and distribution of a microwave signal by using an optoelectronic oscillator. This system can be easily configured to generate microwave signals tuned over a very broad frequency range by selecting an appropriate optical delay. Experimental results show a good signal-to-noise-ratio at 4.1GHz.
A new kind of microwave true time delay (TTD) device based on the dispersion of PbS colloidal quantum dots (QDs) in the commercially available photoresist SU8 is presented. For this purpose PbS-SU8 nanocomposites are integrated on a silicon platform in the form of ridge waveguides. When these structures are pumped at wavelengths below the band-gap of the PbS QDs, a phase shift in an optically conveyed...
In this paper, performance for a particular unamplified microwave photonic filter, based on Intensity Modulation - Direct Detection, is evaluated using three figures of merit: RF gain, noise figure, and spurious-free dynamic range. Values obtained by simulation and experiment allow defining the quality of this electro-optical architecture.
This work describes a microwave photonic filter (MPF) that exhibits five band-pass windows at multiples of 2.0GHz into the frequency range of 0.1–12GHz. A novel electrical microwave band-pass filter (BPF) is designed and fabricated to operate at 4.0GHz. The fabricated BPF exhibits a compact size, low losses, high selectivity and high spurious frequency; these characteristics permit its inclusion into...
A novel scheme for the control of microwave signals carried at optical wavelengths by use of PbS colloidal quantum dots embedded in PMMA waveguides is presented. When these structures are pumped at wavelengths where PbS has efficient absorption (980 or 1310 nm), a phase shift in a signal carried at 1550 nm is induced. Optimal conditions have been analyzed by studying the influence of the microwave...
We show a hybrid fiber-radio system incorporating optical microwave generation, wireless transmission, and optical long haul transmission. Microwave signal generation is achieved by using optical heterodyne technique in the frequency range of 0.1–4.0 GHz. The microwave signal obtained is used as demodulated signal as well as electrical carrier. Microwave signal is mixed with a TV-signal, and used...
Experimental tuning of a microwave photonic filter is achieved by varying the optical link length. Filtering effect is obtained by the interaction of an externally modulated multimode optical source and a dispersive channel. Experimental transmission of TV-signal using this filter is also described in this paper.
A microwave photonic filter based on a Sagnac fiber loop is presented. The frequency response is obtained by phase modulating the clockwise and counterclockwise propagating optical signals inside the Sagnac loop at different times. Experimental results match closely with the theoretical analysis. Finally two schemes for transmission process are proposed to demonstrate its application on optical telecommunications...
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