The paper proposes a conversion method «ILCF-to-amplitude» based on an erbium fiber-optic amplifier. The main design parameters of the conversion device are estimated. It is proposed to select the parameters of the erbium medium in such a way as to obtain the largest steepness of the amplifying characteristic of the converter in the region of the operating wavelength of the segment radiation. On the basis of the stationary model of signal conversion processes in EDFA the basic parameters of the converter are obtained, after which their refinement is performed. Using a specialized simulator, the transfer function of the proposed converter and the possible noise level in the system are determined.
KEYWORDS: Radio optics, Pulse signals, Telecommunications, Unmanned aerial vehicles, Fiber optics, Signal processing, Control systems, Waveguides, Telecommunication networks, Radio over Fiber
The article is devoted to the consideration of the possibility of using the chirp function of optical pulses as a resource for radio segment control in RoF-systems. Such a resource does not belong to the traditional telecommunication resource, is realized at the physical level and is characterized by high speed. The scheme of RoF-segment construction is proposed - using the developed components: the converter «Chirp To Amplitude» and interference splitter. In the case when the antenna array forms a spatial separation of VLANs, it is shown that the parameter of payload of device interfaces improves in relation to the VLANs traditionally formed on the radio segment.
This article is devoted to the generation of surface plasmon at the interface “graphene coating – quartz glass”, as well as on the surface of a round conducting particle. Such plasmons are of interest for creating sensor devices in medicine and biology due to the neutrality of graphene coatings. It is said that to increase the sensitivity of the sensor, the plasmon should be amplified. It has also been shown that the presence of conductive particles in the substance under study affects the overall refractive index of the substance and changes it even at the most insignificant concentration of additional substances (analytes).
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