Journal articles: 'Communication fibre optic'

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(ed), N. Grote and H. Venghaus. "Fibre Optic Communication Devices." Measurement Science and Technology 12, no. 9 (August 16, 2001): 1609. http://dx.doi.org/10.1088/0957-0233/12/9/707.

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ALORF, ISSA OBAID. "The Recent Trends in Fibre Optic Communication." IOSR Journal of Electrical and Electronics Engineering 9, no. 2 (2014): 41–49. http://dx.doi.org/10.9790/1676-09264149.

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Malki, Abdelrafik, Rachid Gafsi, Pierre Lecoy, and Yves Mevel. "Fibre-optic microphone for optical communication systems." Measurement Science and Technology 7, no. 6 (June 1, 1996): 908–10. http://dx.doi.org/10.1088/0957-0233/7/6/008.

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Johannessen, Kjetil, Jon Steinar Andreassen, and Sigurd Moe. "Integrated Fibre Optic Subsea System." Measurement and Control 42, no. 4 (May 2009): 107–12. http://dx.doi.org/10.1177/002029400904200403.

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StatoilHydro, Weatherford, FMC Technologies and Nexans Norway are cooperating in a project called Integrated Fibre Optic Subsea System (IFOSS), where multiple aspects of utilizing optical fibre subsea for enhancing bandwidth and reach are addressed, when compared to conventional control systems. The project scope includes utilizing techniques and components from the telecom industry. A holistic approach is taken to include digital communication and transport of analogue signals from fibre based sensors.

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Sidelnikov, O. S., S. Sygletos, F. Ferreira, and M. P. Fedoruk. "Numerical modelling of multimode fibre-optic communication lines." Quantum Electronics 46, no. 1 (January 31, 2016): 76–80. http://dx.doi.org/10.1070/qe2016v046n01abeh015841.

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Konyshev, V. A., O. E. Nanii, A. G. Novikov, V. N. Treshchikov, and R. R. Ubaydullaev. "Design principles for modern fibre-optic communication lines." Quantum Electronics 49, no. 12 (December 13, 2019): 1149–53. http://dx.doi.org/10.1070/qel17164.

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Bose, D. N., and Arvind Kumar. "InGaAsp-i-n photodiodes for fibre-optic communication." Sadhana 17, no. 3-4 (September 1992): 385–89. http://dx.doi.org/10.1007/bf02811349.

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Swatland, H. J. "On correlating penetrometry with photometry in beef roasts (short communication)." Archives Animal Breeding 48, no. 4 (October 10, 2005): 318–23. http://dx.doi.org/10.5194/aab-48-318-2005.

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Abstract. A fibre-optic probe mounted on the strain gauge of a compression tester was pushed into beef roasts. Reflectance decreased through the subcutaneous adipose tissue and was inversely correlated with resistance to penetration (r = −0.82 at 450 nm and r = −0.84 at 700 nm, P < 0.01). Resistance peaked in the connective tissue of spinales dorsi. Despite illuminating several cubic centimetres of meat, the fibre-optic probe responded mainly to tissues in the near field. The length of the light-path through the meat was minimal (≤ 1 mm).

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Abolade, Robert Oluwayimika, Oluwaseun Olayinka Tooki, and David Oluwagbemiga Aborisade. "REVIEW ARTICLE ON THE MITIGATION OF FOUR WAVE MIXING IN OPTICAL COMMUNICATION SYSTEM." FUTA JOURNAL OF ENGINEERING AND ENGINEERING TECHNOLOGY 15, no. 1 (April 6, 2021): 53–65. http://dx.doi.org/10.51459/futajeet.2021.15.1.266.

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The main challenge faced in today's telecommunication is the ever increasing demand for bandwidth and data rates. The desire to expand the capacity of fiber optic communication to accommodate this demand accelerated the development of high capacity Dense Wavelength Division Multiplexing (DWDM) transmission equipment. However, nonlinear impairments are the fundamental limiting mechanisms to the amount of data that can be transmitted in DWDM. In DWDM, Four Wave Mixing is the most critical of nonlinear effects in fibre optics communication. This effect limits the DWDMâ€™s channel capacity. There are numerous researches on nonlinear impairments that show the intricacy of FWM phenomena in DWDM system. This article present review of the several measures which have been carried out by researchers to overcome nonlinear effects in DWDM. Such measures include Modulation Formats, Channel Spacing, Channel Shuffling Algorithm and Electro-Optic Phase Modulation. The review provides insight into the methods, parameters and approaches used by other researchers. This will pave way for can thus lead to significant improvement in the design of DWDM system.

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Meyer-Ebrecht, D., B. Fasel, and F. Vossebürger. "ImNet: a fibre optic LAN for digital image communication." European Journal of Radiology 10, no. 3 (May 1990): 230–33. http://dx.doi.org/10.1016/0720-048x(90)90147-4.

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Tang, R., P. Devgan, V. S. Grigoryan, and P. Kumar. "Inline frequency-non-degenerate phase-sensitive fibre parametric amplifier for fibre-optic communication." Electronics Letters 41, no. 19 (2005): 1072. http://dx.doi.org/10.1049/el:20052681.

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Akhwaba, James. "Leadership skills, stakeholder management and execution of fibre-optic infrastructure: intervening influence of government policy." Organization, Technology and Management in Construction: an International Journal 13, no. 1 (January 1, 2021): 2426–37. http://dx.doi.org/10.2478/otmcj-2020-0014.

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Abstract Communication technology has drastically evolved in the last 10 years across the globe. With increased demand for data and voice traffic, fibre-optic network is preferred to transmit high-speed broadband. Nonetheless, fibre-optic infrastructure involves huge construction challenges and continues to fail because of ineffective leadership, stakeholder management and government policies. The main purpose of this study was to investigate how government policy intervenes on the joint influence of leadership skills and stakeholder management on execution of fibre-optic infrastructure in Nairobi County, Kenya. This study adopted the pragmatism paradigm approach, with a cross-sectional survey design. Census was used to select 187 respondents from a target population of 187 functional staff in fibre-optic infrastructure departments. A questionnaire was used to collect quantitative data while an interview guide was used to collect qualitative data. Statistical analysis techniques were used to analyse the data. It was demonstrated that government policy has a significant intervening influence on the joint influence of leadership skills and stakeholder management on execution of fibre-optic infrastructure. Therefore, governments should come up with policies to guide and regulate execution of fibre-optic infrastructure, review building code to allow for fibre-optic services in new buildings, develop right of way conduits and establish a centrally coordinated authority to facilitate time-bound issuance of permits and related services. It was suggested that similar studies should be carried out in other countries and target vendors and contractors engaged in supply of equipment and construction of fibre-optic infrastructure.

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Phillips, A. J., R. A. Cryan, and J. M. Senior. "Optically preamplified pulse-position modulation for fibre-optic communication systems." IEE Proceedings - Optoelectronics 143, no. 2 (1996): 153. http://dx.doi.org/10.1049/ip-opt:19960180.

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Siergiejczyk, Mirosław. "Availability of the Motorway Emergency Communications." Journal of Konbin 5, no. 2 (January 1, 2008): 291–306. http://dx.doi.org/10.2478/v10040-008-0053-3.

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Availability of the Motorway Emergency Communications The paper presents issues related to the assessment of availability of one of the motorway telematics systems: the emergency communication system. The essence and tasks of transport telematic systems have been presented in a general outline. The architecture of the fibre optic emergency communication system and the tasks of particular subsystems have also been presented. Using the functional structure and the method of sending information through the system, a method for calculating the availability of the motorway emergency communication system was proposed.

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Swatland, H. J. "Fibre-optic spectrophotometry of beef relative to sarcomere length (short communication)." Archives Animal Breeding 46, no. 1 (October 10, 2003): 31–34. http://dx.doi.org/10.5194/aab-46-31-2003.

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Abstract. Fibre-optic spectrophotometry of beef longissimus thoracis showed reflectance was correlated negatively with sarcomere length, reaching a maximum at 470 nm (r = −0.46, P < 0.025, n = 20) with mean sarcomere length 1.75 ± 0.15 mm. The beef had never been frozen and was extensively aged (30.5 ± 5.0 days). This conflicts with other relationships in attempts to predict tenderness from light scattering.

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Fenta, Mulugeta C., David K. Potter, and János Szanyi. "Fibre Optic Methods of Prospecting: A Comprehensive and Modern Branch of Geophysics." Surveys in Geophysics 42, no. 3 (March 9, 2021): 551–84. http://dx.doi.org/10.1007/s10712-021-09634-8.

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AbstractOver the past decades, the development of fibre optic cables, which pass light waves carrying data guided by total internal reflection, has led to advances in high-speed and long-distance communication, large data transmission, optical imaging, and sensing applications. Thus far, fibre optic sensors (FOSs) have primarily been employed in engineering, biomedicine, and basic sciences, with few reports of their usage in geophysics as point and distributed sensors. This work aimed at reviewing the studies on the use of FOSs in geophysical applications with their fundamental principles and technological improvements. FOSs based on Rayleigh, Brillouin, and Raman scatterings and fibre Bragg grating sensors are reviewed based on their sensing performance comprising sensing range, spatial resolution, and measurement parameters. The recent progress in applying distributed FOSs to detect acoustic, temperature, pressure, and strain changes, as either single or multiple parameters simultaneously on surface and borehole survey environments with their cable deployment techniques, has been systematically reviewed. Despite the development of fibre optic sensor technology and corresponding experimental reports of applications in geophysics, there have not been attempts to summarise and synthesise fibre optic methods for prospecting as a comprehensive and modern branch of geophysics. Therefore, this paper outlines the fibre optic prospecting methods, with an emphasis on their advantages, as a guide for the geophysical community. The potential of the new outlined fibre optic prospecting methods to revolutionise conventional geophysical approaches is discussed. Finally, the future challenges and limitations of the new prospecting methods for geophysical applications are elucidated.

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Zhitelev, A. E., V. A. Konyshev, S. N. Lukinykh, O. E. Nanii, V. N. Treshchikov, and R. R. Ubaydullaev. "Nonlinear distortions as nonlinear noise in coherent fibre-optic communication lines." Quantum Electronics 47, no. 12 (December 27, 2017): 1135–39. http://dx.doi.org/10.1070/qel16559.

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Chandramohan, Sujatha, and JP Raina. "Receivers for Digital Fibre Optic Communication Systems: State-of-the Art." IETE Journal of Research 32, no. 4 (July 1986): 273–80. http://dx.doi.org/10.1080/03772063.1986.11436607.

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Bartelmess, Juergen, David Zimmek, Matthias Bartholmai, Christoph Strangfeld, and Michael Schäferling. "Fibre optic ratiometric fluorescence pH sensor for monitoring corrosion in concrete." Analyst 145, no. 6 (2020): 2111–17. http://dx.doi.org/10.1039/c9an02348h.

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Et. al., Masharipov Otaboy Matyoqubovich,. "On A Methods Of Using Weighted Simulation Improving Reliability To Redundant Fiber Optic Communication Systems." Turkish Journal of Computer and Mathematics Education (TURCOMAT) 12, no. 5 (April 11, 2021): 1538–50. http://dx.doi.org/10.17762/turcomat.v12i5.2125.

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The article describes the methodology of weighted modelling to increase the reliability of redundant fibre-optic communication systems. In a specific example, a network graph of a many-node fibre-optic communication system is considered. Applying general ideas to determine the reliability characteristics of systems consisting of a large number of different types of elements with different functional relationships between them is quite a difficult task. The materials presented in this article are intended to solve this problem. Along with their relative simplicity, they are highly accurate. The numerical examples in this chapter show that the use of these methods for highly reliable systems can reduce the variance of the estimate by several orders of magnitude compared to the direct modelling method, and thus reduce the time required for calculations on electronic computers by several orders of magnitude. The purpose of the study is to increase the reliability of fibre-optic communication systems. The research methodology is based on models with a limited number of monotonous failure chains, which is available for visual enumeration of the reliability of highly reliable systems. As a result, it is proposed to obtain an approximate formula for assessing the reliability of a highly reliable system, both by modelling and analytically, and calculations using it can be performed using the quadrature method or moment methods. This allows you to build a model according to the block principle, including full-scale blocks or records of the results of their tests, simplifies the interpretation of the results, and creates convenience in software implementation.

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Ali, Adnan, and Alaa Farhood. "Design and Performance Analysis of the WDM Schemes for Radio over Fiber System With Different Fiber Propagation Losses." Fibers 7, no. 3 (February 26, 2019): 19. http://dx.doi.org/10.3390/fib7030019.

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The integration of optical and wireless networks increases mobility and capacity and decreases costs in access networks. Fibre optic communication can be considered optical communication that combines the methodologies of two communications, and it may be utilised in systems of wired and wireless communication. The solution for many problems is radio over fibre (RoF) because it can control many base stations (BS) that are connected to a central station (CS) with an optical fibre. The received RoF signal head for in a low quality; thus, many factors will result in some problems such as a high bit error rate (BER) and low Q-factor values, and the receiver might not be operating in a high data rate network. Wavelength division multiplexing (WDM) network can offer a solution to these problems where the transmission of different signals can be done with a single-mode fibre. BER should be reduced to assured values, and the Q-factor must be increased. The investigation of WDM-RoF with different lengths of fibre at various channel spacing will be simulated using Optisystem software, and the RoF’s receiver performance is measured and analyzed depending on the acquired BER, the value of the Q-factor, and the height of the opening of the eye diagram. The degradation factors effect such as attenuation and dispersion are significantly limited with the addition of an EDFA amplifier to a Single Mode Fibre (SMF).

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Akhwaba, James Konya, Omondi Bowa, and Peter Keiyoro. "Leadership Skills, Stakeholder Management and Execution of Fibre Optic Infrastructure." Journal of Engineering, Project, and Production Management 10, no. 1 (January 1, 2020): 80–86. http://dx.doi.org/10.2478/jeppm-2020-0010.

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AbstractThe main purpose of this study was to investigate how leadership skills and stakeholder management acting together to influence the execution of fibre optic infrastructure. The study adopted the pragmatism research paradigm, with a cross-sectional survey design. Census was used to select 187 respondents from a target population of 187 functional members of staff in fibre optic infrastructure departments of two mobile telecommunication and four internet service companies in Nairobi County, Kenya. A self-administered structured questionnaire was used to collect quantitative data while an interview guide and document review guide were used to collect qualitative data. Inferential statistical analysis was performed using multiple regression. It was demonstrated that leadership skills and stakeholder management act together to have a significant positive influence on the execution of fibre optic infrastructure. Therefore, there is a need for companies to ensure that stakeholders are involved in all phases of a project from inception to closure. Mobile telecommunication and internet service providing companies should also develop training programs to improve the leadership skills of project leaders and make use of conflict management strategies and communication skills to ensure appropriate management of change. It was suggested that similar and comparable studies should be conducted in other countries across the world.

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Kiktenko, E. O., N. O. Pozhar, A. V. Duplinskiy, A. A. Kanapin, A. S. Sokolov, S. S. Vorobey, A. V. Miller, et al. "Demonstration of a quantum key distribution network in urban fibre-optic communication lines." Quantum Electronics 47, no. 9 (September 29, 2017): 798–802. http://dx.doi.org/10.1070/qel16469.

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Lao, Z. H., D. Clawin, E. Schlag, U. Langmann, and J. N. Albers. "Silicon bipolar 1:16-demultiplexer for 10 Gbit/s fibre optic communication system." Electronics Letters 30, no. 15 (July 21, 1994): 1214–16. http://dx.doi.org/10.1049/el:19940818.

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Lygouras, J. N., A. Kapsopoulos, and Ph G. Tsalides. "High speed RS-232 fibre optic communication system for underwater remotely operated vehicles." Microprocessors and Microsystems 19, no. 3 (January 1995): 115–20. http://dx.doi.org/10.1016/0141-9331(95)96905-k.

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Hu, Hao, and Leif K. Oxenløwe. "Chip-based optical frequency combs for high-capacity optical communications." Nanophotonics 10, no. 5 (February 3, 2021): 1367–85. http://dx.doi.org/10.1515/nanoph-2020-0561.

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AbstractCurrent fibre optic communication systems owe their high-capacity abilities to the wavelength-division multiplexing (WDM) technique, which combines data channels running on different wavelengths, and most often requires many individual lasers. Optical frequency combs, with equally spaced coherent comb lines derived from a single source, have recently emerged as a potential substitute for parallel lasers in WDM systems. Benefits include the stable spacing and broadband phase coherence of the comb lines, enabling improved spectral efficiency of transmission systems, as well as potential energy savings in the WDM transmitters. In this paper, we discuss the requirements to a frequency comb for use in a high-capacity optical communication system in terms of optical linewidth, per comb line power and optical carrier-to-noise ratio, and look at the scaling of a comb source for ultra-high capacity systems. Then, we review the latest advances of various chip-based optical frequency comb generation schemes and their applications in optical communications, including mode-locked laser combs, spectral broadening of frequency combs, microresonator-based Kerr frequency combs and electro-optic frequency combs.

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Kumar, Arun, and L. Anjaneyulu. "Design and Development of Redeployable Underwater Data Communication Link for Defence Application." Defence Science Journal 68, no. 1 (December 18, 2017): 111. http://dx.doi.org/10.14429/dsj.68.11837.

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<p class="p1">Testing of underwater system for defence application is carried out from submersible platform at specified depth. The underwater platform houses the article under test, equipment and instruments required to conduct the test and to control the platform. During development phase of defence systems, large numbers of sensors are mounted on the test article and data is collected to validate the design. Data acquisition system, video camera and high speed video cameras are positioned on the platform to record physical parameters and observe visually the performance of the article under evaluation. Since the data and video signals are parallely recorded on ship, the bandwidth demand for real-time data communication from underwater platform to control station is very high. The existing technology presently used for underwater communication has limitation of bandwidth and not suitable for defence application. This paper describes in detail the design and development of a re-deployable data communication link by laying a specially designed negatively buoyant fibre optic cable in high-sea from ship to underwater platform to provide higher bandwidth required for defence application. The link has been successfully used for sea state less than one during evaluation of underwater defence system. The availability of bandwidth from underwater platform to control system can be increased significantly by laying fibre optic cable in high sea. It also provides unlimited bandwidth for the above requirement.<span class="Apple-converted-space"> </span></p>

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Moslehi, B., W. Parkyn, and K. Shirk. "Low-cost fibre optic tree couplers with applications to communication and sensing distribution networks." Electronics Letters 27, no. 10 (May 9, 1991): 851–53. http://dx.doi.org/10.1049/el:19910533.

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Tomizawa, M. "Chirped pulse colour modulation and its maximum likelihood detection in fibre optic communication systems." Electronics Letters 40, no. 8 (2004): 500. http://dx.doi.org/10.1049/el:20040320.

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Leilabady, P. Akhavan, A. P. Wayte, M. Berwick, J. D. C. Jones, and D. A. Jackson. "A pseudo-reciprocal fibre-optic Faraday rotation sensor: Current measurement and data communication applications." Optics Communications 59, no. 3 (September 1986): 173–76. http://dx.doi.org/10.1016/0030-4018(86)90279-8.

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Shikoski, Jovan, Rumen Arnaudov, and Tinko Eftimov. "A study of the frequency characteristics of a photovoltaic convertor РРС-4Е." Photonics Letters of Poland 10, no. 3 (October 1, 2018): 70. http://dx.doi.org/10.4302/plp.v10i3.839.

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The paper considers the possibility to use the fiber-compatible photovoltaic converter РРС-4Е simultaneously as a detection photodetector for the combined transmission of photonic power and optical communication signals along a single fiber. We have studied the frequency transfer characteristics of the specialized converter РРС-4Е designed primarily for photovoltaic conversion. Full Text: PDF ReferencesPowering Remote Data Links over Fiber, www.lumentum.com, Lumentum LLC, 2015. DirectLink Basanskaya, A.: Electricity over Glass. Spectrum, IEEE, Vol. 40, No. 10, page 18, 2005. DirectLink Cohen, M.: Power-over-fibre drives remote data exchange. OPTO and Laser Europe, pages 27-29, 2006. DirectLink Yasui, T.; Ohwaki, J.; Mino, M.; Sakai, T.: A Stable 2-W Supply Optical-Powering System. 28th Photovoltaic Specialists Conference, pages 1614-1617, 2000. CrossRef Werthen, J.-G.: Powering Next Generation Networks by Laser Light over Fiber. Optical Fiber communication/National Fiber Optic Engineers Conference, pages 1-3, 2008. DirectLink Iniewski K., Medical Imaging: Principles, Detectors and Electronics, p. 292, New Jersey, 2009. DirectLink Kartalopoulos, S., Optical Bit Error Rate: An Estimation Methodology (2004) Willey- IEEE Press. DirectLink Electronic Devices and Circuits: Discrete and integrated, Chapter 14 Active filters, Denton J. Daily, Prentice Hall, 2001. DirectLink

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Dhanapal, S., and M. Mukunda Rao. "Optimistation of the Bias of an Injection Laser in a Digital Fibre Optic Communication System." IETE Journal of Research 32, no. 4 (July 1986): 343–45. http://dx.doi.org/10.1080/03772063.1986.11436618.

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Xu, B., and J. Xie. "Low-density parity-check code for high-speed fibre-optic communication and its experimental verification." IET Communications 4, no. 10 (2010): 1247. http://dx.doi.org/10.1049/iet-com.2009.0534.

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Chang, Gee-Kung, and Lin Cheng. "The benefits of convergence." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 374, no. 2062 (March 6, 2016): 20140442. http://dx.doi.org/10.1098/rsta.2014.0442.

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A multi-tier radio access network (RAN) combining the strength of fibre-optic and radio access technologies employing adaptive microwave photonics interfaces and radio-over-fibre (RoF) techniques is envisioned for future heterogeneous wireless communications. All-band radio spectrum from 0.1 to 100 GHz will be used to deliver wireless services with high capacity, high link speed and low latency. The multi-tier RAN will improve the cell-edge performance in an integrated heterogeneous environment enabled by fibre–wireless integration and networking for mobile fronthaul/backhaul, resource sharing and all-layer centralization of multiple standards with different frequency bands and modulation formats. In essence, this is a ‘no-more-cells’ architecture in which carrier aggregation among multiple frequency bands can be easily achieved with seamless handover between cells. In this way, current and future mobile network standards such as 4G and 5G can coexist with optimized and continuous cell coverage using multi-tier RoF regardless of the underlying network topology or protocol. In terms of users’ experience, the future-proof approach achieves the goals of system capacity, link speed, latency and continuous heterogeneous cell coverage while overcoming the bandwidth crunch in next-generation communication networks.

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Casadevall, F., and J. Pastor. "Performance of fractional tap-spacing equalizers for long-haul high-capacity digital fibre-optic communication systems." Optical and Quantum Electronics 18, no. 3 (May 1986): 189–201. http://dx.doi.org/10.1007/bf02030989.

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Curran, Stephen John. "Broadband Communications for Aircraft in Oceanic and Other Remote Areas." International Journal of Aviation Systems, Operations and Training 1, no. 1 (January 2014): 51–59. http://dx.doi.org/10.4018/ijasot.2014010106.

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Data communication with aircraft presents unique technical challenges and these challenges are more pronounced when the aircraft are travelling over oceanic or other remote areas. When in populated areas, systems are available that can support high speed data services, one Gigabit per second (Gbps) and beyond via, terrestrial ground stations. However no such systems exist to provide airborne communications with high bandwidths among aircraft and between aircraft and the ground in more remote regions. Passengers will expect data service on the aircraft similar to what they typically experience on the ground. Multimedia activities, such as video streaming, are very bandwidth intensive and the provision of these services presents a serious technical challenge. On the ground, fibre optic cables are the method of choice for the provision of high speed data service, and in contrast, an airborne high speed data communications solution will need to be a wireless one.

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Graovac, Radojica, and Dragomir Markovic. "New role for communication fibre optic cables in water utility for leak detection on main water pipeline." Tehnika 70, no. 6 (2015): 1073–76. http://dx.doi.org/10.5937/tehnika1506073g.

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Khabarova, K. Yu, K. S. Kudeyarov, G. A. Vishnyakova, and N. N. Kolachevsky. "Short-haul fibre-optic communication link with a phase noise compensation system for optical frequency signal transmission." Quantum Electronics 47, no. 9 (September 29, 2017): 794–97. http://dx.doi.org/10.1070/qel16471.

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Skidin, A. S., O. S. Sidelnikov, and M. P. Fedoruk. "Application of combined optical signal processing methods to compensate for nonlinear effects in fibre-optic communication links." Quantum Electronics 48, no. 12 (December 18, 2018): 1160–63. http://dx.doi.org/10.1070/qel16849.

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Krull, Ulrich J., Chrisula Bloore, and Gareth Gumbs. "Communication. Supported chemoreceptive lipid membrane transduction by fluorescence modulation: the basis of an intrinsic fibre-optic biosensor." Analyst 111, no. 2 (1986): 259. http://dx.doi.org/10.1039/an9861100259.

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Mogensen, F., B. Pedersen, and B. Nielsen. "New polarisation-insensitive and robust all-fibre-optic interferometer for FM to AM conversion in optical communication." Electronics Letters 29, no. 16 (1993): 1469. http://dx.doi.org/10.1049/el:19930982.

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Karimi, M., M. Nasiri-Kenari, F. S. Tabataba, and S. M. Aghajanzadeh. "Multistage decoding for an internally coded fibre-optic time-hopping∕optical code division multiple access communication system." IET Communications 3, no. 4 (2009): 655. http://dx.doi.org/10.1049/iet-com.2008.0345.

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Bogdanov, S. A., and O. S. Sidelnikov. "Use of complex fully connected neural networks to compensate for nonlinear effects in fibre-optic communication lines." Quantum Electronics 51, no. 5 (May 1, 2021): 459–62. http://dx.doi.org/10.1070/qel17518.

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Okeke, R. O., V. E. Idigo, M. O. Akemi, and S. K. Ogbuokebe. "Passive Optical Network: A Fibre to the ‘X’ Approach." European Journal of Engineering and Technology Research 6, no. 3 (April 6, 2021): 1–9. http://dx.doi.org/10.24018/ejers.2021.6.3.2398.

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With the rapid increasing bandwidth demand mainly driven by the development of advanced broadband multimedia application, such as video-on-demand (VoD), interactive high-definition digital television (HDTV) and video conference, new access network solutions that provide high capacity are highly needed to satisfy these emerging services. In a largely populated and technologically exposed institution such the University of Port Harcourt, this demand is truly great. The Passive Optical Network (PON), which utilizes the Fibre Optic Technology, is a suitable solution to this problem. Hence this is geared towards the design and simulation of a Passive Optical Network for the University’s campus district. This Campus based Local Area Network consists of the Various Faculty buildings, the Senate building which is the central administrative building, and was centralized at the Information and Communication Technology Center (ICTC), which served as the Central Office of the network. The Wavelength Division Multiplexing (WDM) technique was utilized because of its dedicated bandwidth for each subscriber and more flexible bandwidth management. The validation was carried out on a virtual computation environment called OptiSystem©.

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Blanutsa, Victor I. "The effect of cross-border fibre-optic transitions on the information and communication connectivity of the Russian cities." Baltic Region 10, no. 4 (2018): 4–19. http://dx.doi.org/10.5922/2079-8555-2018-4-1.

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The Russian cities are connected by many telecommunication lines. The information flow between any two cities can be sent via multiple routes, including those running through the networks of other countries. Cross-border transitions are created to connect the Russian lines with the international networks. The effect of these transitions on the connectivity of the cities has not been analysed earlier, either for Russia or for any other country. Using my own database on the Russian telecommunication lines, the Rosstat data on the cities’ population, and the results of the scanning of the Internet topology, I attempt to assess the effect of these transitions on the connectivity of the Russian cities. The assessment is carried out at the physical, economic, and digital levels of connectivity. For each level, I calculate the proportion of cities and their residents interacting directly with international telecommunication networks. Of the three categories of physical connectivity, the system of the Russian cities is associated with the worst option — the exogenous connectivity. This is explained by the impossibility of connecting the Kaliningrad region with mainland Russia without using international networks. An analysis of the traffic redistribution between the core cities of the autonomous systems shows that closed flows and internal economic connectivity are predominant in Russia. The calculation of information flow delays between all the Russian cities and the cores of the national and international digital agglomerations makes it possible to establish what cities are affected by the international cores. I conclude that the cross-border transitions have little effect on the information and communication connectivity of the Russian cities.

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Rusan, Igor, and Yevhenii Korotkov. "Analytical review of developments and im-provements of the working body of the cable-layer at trenchless laying of cables." Gіrnichі, budіvelnі, dorozhnі ta melіorativnі mashini, no. 96 (December 31, 2020): 35–41. http://dx.doi.org/10.32347/gbdmm2020.96.0402.

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The article provides an analytical review of scientific developments to improve the process of cable laying in general and specifically the working body of the cable layer in the trenchless laying of cables in different geological conditions. Using the patent documentation, the search and analysis of materials for the improvement of the working body of the cable layer and the main advantages of trenchless cable laying were carried out. The task of trenchless laying is: laying of water supply networks, sewerage, gas pipeline; laying of power supply cables, telephone and fibre-optic cable communication and alarm lines; laying on the bottom of rivers and reservoirs; laying in mountainous areas; replacement of worn-out communications with new ones. The article analyzes the improvement of the design of cable-laying with active earth-moving working bodies (ZRO), the principle of operation of which is based on the trenchless method, which has limited working speed and relative working speed, design complexity and low operational reliability.

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Liga, Gabriele, Astrid Barreiro, Hami Rabbani, and Alex Alvarado. "Extending Fibre Nonlinear Interference Power Modelling to Account for General Dual-Polarisation 4D Modulation Formats." Entropy 22, no. 11 (November 20, 2020): 1324. http://dx.doi.org/10.3390/e22111324.

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In optical communications, four-dimensional (4D) modulation formats encode information onto the quadrature components of two arbitrary orthogonal states of polarisation of the optical field. Many analytical models available in the optical communication literature allow, within a first-order perturbation framework, the computation of the average power of the nonlinear interference (NLI) accumulated in coherent fibre-optic transmission systems. However, all such models only operate under the assumption of transmitted polarisation-multiplexed two-dimensional (PM-2D) modulation formats, which only represent a limited subset of the possible dual-polarisation 4D (DP-4D) formats. Namely, only those where data transmitted on each polarisation channel are mutually independent and identically distributed. This paper presents a step-by-step mathematical derivation of the extension of existing NLI models to the class of arbitrary DP-4D modulation formats. In particular, the methodology adopted follows the one of the popular enhanced Gaussian noise model, albeit dropping most assumptions on the geometry and statistic of the transmitted 4D modulation format. The resulting expressions show that, whilst in the PM-2D case the NLI power depends only on different statistical high-order moments of each polarisation component, for a general DP-4D constellation, several other cross-polarisation correlations also need to be taken into account.

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Burnett, Douglas R., and Lionel Carter. "International Submarine Cables and Biodiversity of Areas Beyond National Jurisdiction." Brill Research Perspectives in the Law of the Sea 1, no. 2 (July 4, 2017): 1–72. http://dx.doi.org/10.1163/24519359-12340002.

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If one uses Facebook, Facetime, Skype, Netflix, or any application of the internet internationally, a submarine cable is involved. Fibre optic cables bind the world together from governments, banks, shipping, airlines and other major logistic industries to homes and personal electronic devices. Server farms maintained by major telecom and content companies allow vast amounts of data to be stored and retrieved from thecloud. Not often appreciated is the fact that these server locations worldwide are connected by submarine fibre optic cables. In this sense, thecloudis beneath the sea. While submarine communication cables have been in steady use since 1850, their preeminent place in the modern world has never been as dominant and personal as now. Since 1884, this critical international infrastructure has rested upon international treaties, now reflected in universally accepted provisions of the 1982 United Nations Convention on the Law of the Sea (unclos) that provides for freedoms to lay and maintain international submarine cables. Recently, calls have mounted in the context of marine biodiversity beyond national jurisdiction (bbnj) for centralized control of submarine cables and for express orde factodiminishment of the freedoms related to them that have served the world’s peoples for so long. This monograph examines the time proven importance of the existing international treaties, the largely peer review science on the environmental interaction of submarine cables with high seas environments, and the current submarine cable issues in the context of thebbnjdebates.

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Sidelnikov, O. S., A. S. Skidin, and M. P. Fedoruk. "Investigation of nonlinear effects in the transmission of a QAM signal in fibre optic communication lines using different carrier pulses." Quantum Electronics 47, no. 12 (December 27, 2017): 1140–43. http://dx.doi.org/10.1070/qel16537.

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Hall, David, Yu-Hsin Liu, and Yu-Hwa Lo. "Single photon avalanche detectors: prospects of new quenching and gain mechanisms." Nanophotonics 4, no. 4 (November 6, 2015): 397–412. http://dx.doi.org/10.1515/nanoph-2015-0021.

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AbstractWhile silicon single-photon avalanche diodes (SPAD) have reached very high detection efficiency and timing resolution, their use in fibre-optic communications, optical free space communications, and infrared sensing and imaging remains limited. III-V compounds including InGaAs and InP are the prevalent materials for 1550 nm light detection. However, even the most sensitive 1550 nm photoreceivers in optical communication have a sensitivity limit of a few hundred photons. Today, the only viable approach to achieve single-photon sensitivity at 1550 nm wavelength from semiconductor devices is to operate the avalanche detectors in Geiger mode, essentially trading dynamic range and speed for sensitivity. As material properties limit the performance of Ge and III-V detectors, new conceptual insight with regard to novel quenching and gain mechanisms could potentially address the performance limitations of III-V SPADs. Novel designs that utilise internal self-quenching and negative feedback can be used to harness the sensitivity of single-photon detectors,while drastically reducing the device complexity and increasing the level of integration. Incorporation of multiple gain mechanisms, together with self-quenching and built-in negative feedback, into a single device also hold promise for a new type of detector with single-photon sensitivity and large dynamic range.

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Journal articles on the topic 'Communication fibre optic'

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