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In this paper a practical application of an electrooptical communication system based on external modulation is reported. The sixteen ATSC TV-channels located at 2.4 GHz, were transmitted over a 30 km of standard optical fiber. The transmitted TV-signal uses Single-Side Band Full Carrier (SSBFC) modulation, allowing in this way an adequate management of the transmitted power and the bandwidth. The...
In this paper, a theoretical study of the influence of three differents dielectric films in the characteristic impedance of electro-optic modulators is analyzed. These devices are built in lithium niobate substrate and are used in high-speed and high-frequency optical communications. The modulating electric signal is applied to the coplanar waveguide or asymmetric coplanar strip electrodes. In order...
A brief overview from some of the most important applications using integrated optical sensors performed in 2016 are presented. According to the sensing techniques the reviewed papers are classified in order to show the main contributions in the detection of the pH, gas, humidity, chemical species, and antigens, as well as biosensors.
This work describes an electro-optical system capable to transmit a wireless reference signal of 0.915 GHz using the Radio-over-Fiber technique. The reference signal is supplied by a RF multiband transceiver, sensed by an antenna, and coded on the filtered microwave band-pass windows situated at 2.31 GHz, 4.62 GHz, and 6.86 GHz. Mixing the reference signal with an analog microwave signal, the resulting...
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.
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