V.A. Grigoriev, Dr. Sc. (Engineering), Head of department of ZAO MNITI; Yu.T. Larin, Dr. Sc. (Engineering), General Director of OOO VNIIKP-OPTIC; A.G. Letyago, Dr. Sc. (Engineering), Adviser to General Director of ZAO MNITI, Corresponding Member of Russian Academy of Rocket and Artillery Sciences, Laureate of the RF State Prize; A.N. Mart’yanov, Dr. Sc. (Engineering), Professor of Peter the Great Military Academy of Strategic Rocket Forces; V.I. Pryadko, Dr. Sc. (Engineering), First Deputy General Director of ZAO Evrika, Laureate of the RF State Prize; A.A. Rakhmanov, Dr. Sc. (Engineering), Professor, Deputy Chief Designer of OOO RTI
Some issues of using the theory of optical transmission lines in physical quantity measurement. Part 2
The efficiency of application of the data transmission line theory and high numerical aperture optical fibers for designing optical sensors with high metrological characteristics was investigated.
R.G. Kuznetsov, Principal Design Engineer of OOO NPP Spetskabel
Estimation of high-frequency cable screening efficiency - issues of importance
A review of domestic standard requirements for screening properties ensuring the electromagnetic compatibility of present-day communication cables designed for digital information transmission within the frequency range up to 3.0 GHz and above. Methods for measuring cable screening parameters recommended by the standards are studied. Screen designs are shown and the results of experimental determination of screening parameters are given illustrated by the example of cables for industrial automation systems, as well as radio-frequency coaxial cables made by NPP Spetskabel. Frequency dependences of screen parameters are explained.
V.N. Korshunov, Dr. Sc. (Engineering), Professor of Multi-Channel Telecommunication Systems Department of Moscow Technical University of Communication and Information Science
Data transmission capacity of trunk optical cables
Methods for ensuring high rates of optical cable data transmission are estimated. High efficiency modulation formats for 100G and above systems are characterized. Optical cable system channel transmission rate was calculated using Nyquist limit. Maximum optical fiber data transmission rates were determined using nonlinear Shennon limit.
Trunk optical cable, optical fiber, data transmission rate, Nyquist limit.
S.S. Fetisov, Cand. Sc. (Engineering), Deputy Division Manager, head of Laboratory; JSC VNIIKP
Superconducting cables for power industry – development progress worldwide and in Russia
Investigations aimed at creating superconducting power cables based on high-temperature superconductivity (HTSC) were started both abroad and in Russia. The main advantage of HTSC cables is due to the fact that cheaper and more available liquid nitrogen is used as a coolant. That is why comparatively cheap cryostats and reliable and more economical cryogenic systems can be used. Active work is carried out in JSC VNIIKP to create power cables based on new superconductors, both with the use of first and second generation HTSC and relatively new MgB2 (magnesium boride). Nowadays HTSC cable lines are globally developed, manufactured and introduced into existing power grids. HTSC cables are the most advanced application of superconductivity in power industry; their importance is recognized all over the world. The paper deals mainly with the review and analysis of superconducting cable development and introduction activities abroad and in Russia. Attention is drawn to the high level of work carried out in Russia. The results of superconducting cable development in VNIIKP are presented, including MgB2 based cable cooled by liquid hydrogen, where liquid hydrogen is also used for power transmission.
Superconductivity, HTSC, superconducting power cables, cable lines.
B.E. Vasiliev, Shop Manager of ZAO Electroprovod; G.A. Ivanov, Dr. Sc. (Chemistry), Head of Laboratory of Kotelnikov Institute of Radiotechnics and Electronics of the RF Academy of Sciences; P.E. Nemtsova, Technician, JSC VNIIKP I.A. Ovchinnikova, Cand. Sc. (Engineering), Head of Laboratory of JSC VNIIKP; Fire-resistant fire-safe cable technologies
The paper addresses matters related to the manufacturing technologies of fire-resistant fire-safe optical cables. Methods for maintaining operational capability of optical fibers under high-temperature exposure are described; results of investigation carried out to study the possibility of improving fire resistance of optical fibers by applying heat-resistant carbon and metal coatings are given; most advanced materials and techniques for manufacturing fire-resistant fire-safe optical cables are revealed and suggested.
Optical cables, optical fibers, fire-resistant optical fibers, installations of increased safety, fire safety, fire resistance, thermal barriers, silicon rubber, technology.