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Fiber Optic Data Bus Radiation Effects Study
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Book Synopsis Fiber Optic Data Bus Radiation Effects Study by :
Download or read book Fiber Optic Data Bus Radiation Effects Study written by and published by . This book was released on 1992 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report summarizes a study of radiation effects in components of a proposed fiber optic data bus for space, including models of the natural radiation environment. This test procedure outlines methods for measuring both the steady state response of optical fibers and cables exposed to continuous radiation and the transient response of optical fibers and cables exposed to a pulse of radiation. It can be used to determine the level of radiation-induced attenuation produced in single-mode or multimode optical fibers, in either cabled or uncabled form.
Book Synopsis Radiation Effects on Fiber Optics by : James A. Wall (Jr.)
Download or read book Radiation Effects on Fiber Optics written by James A. Wall (Jr.) and published by . This book was released on 1975 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: Samples representative of most of the optical fibers presently available in lengths of 10 m or more were tested for their responses to energetic radiation. Glass fibers doped with three different levels of cesium were also prepared and tested. Permanent and transient x-radiation effects tests were performed. Neutron effects tests were performed. All of the fibers tested showed decreases in transmission when exposed to radiation. All of the fibers emitted fluorescent light pulses when exposed to intense x-ray pulses.
Book Synopsis Radiation Effects on Fiber Optics and Opto Electronics by : IGIC, Inc. Staff
Download or read book Radiation Effects on Fiber Optics and Opto Electronics written by IGIC, Inc. Staff and published by Information Gatekeepers Inc. This book was released on 1994 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Radiation Effects on Fiber Optics and Opto Electronics by :
Download or read book Radiation Effects on Fiber Optics and Opto Electronics written by and published by . This book was released on 1990 with total page 183 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Accuracy of Analog Fiber-Optic Links in Pulsed Radiation Environments by :
Download or read book Accuracy of Analog Fiber-Optic Links in Pulsed Radiation Environments written by and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Interferometric fiber-optic links used in pulsed-power experiments are evaluated for accuracy in the presence of radiation fields which alter fiber transmission. Amplitude-modulated format (e.g., Mach-Zehnder) and phase-modulated formats are compared. Historically, studies of radiation effects on optical fibers have focused on degradation and recovery of the fibers transmission properties; such work is either in the context of survivability of fibers in catastrophic conditions or suitability of fibers installed for command and control systems within an experimental facility [1], [2]. In this work, we consider links used to transmit realtime diagnostic data, and we analyze the error introduced by radiation effects during the drive pulse. The result is increased uncertainties in key parameters required to unfold the sinusoidal transfer function. Two types of modulation are considered: amplitude modulation typical of a Mach-Zehnder (M-Z) modulator [3], and phase modulation, which offers more flexible demodulation options but relies on the spatiotemporal coherence of the light in the fiber. The M-Z link is shown schematically in Fig. 1, and the phase-modulated link is shown in Fig. 2. We present data from two experimental environments: one with intense, controlled radiation fields to simulate conditions expected at the next generation of pulsed-power facilities, and the second with radiation effects below the noise level of the recording system. In the first case, we intentionally expose three types of single-mode fiber (SMF) to ionizing radiation and study the response by simultaneously monitoring phase and amplitude of the transmitted light. The phase and amplitude effects are evidently dominated by different physical phenomena, as their recovery dynamics are markedly different; both effects, though, show similar short-term behavior during exposure, integrating the dose at the dose levels studied, from 1 to 300 kRad, over the exposure times of 50 ps and 30 ns. In the second case, we present data using a state-of-the-art fiber-optic link for single-shot transmission and recording, fielded at the OMEGA laser facility on high-yield fusion experiments. Gamma reaction history data are measured with a gas Cherenkov detector (GCD) [4], [5] and transmitted by M-Z link to a 12 GHz digitizer. Since radiation effects on the fibers are not above the noise floor, the error analysis for the unfolded data is dominated by the performance of the fast digitizer, the photoreceiver, and the laser.
Book Synopsis Radiation Effects in Fiber Optic Waveguides by : G. H Sigel (Jr)
Download or read book Radiation Effects in Fiber Optic Waveguides written by G. H Sigel (Jr) and published by . This book was released on 1973 with total page 93 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive review is presented on the effects of ionizing radiation on the performance of fiber optic cables, and on the materials used for fabrication of optical fibers. This includes a summary of the permanent and transient radiation-induced losses in optical transmission of state of the art fibers, a detailed discussion of the mechanisms responsible for the losses observed, and a report on inhouse materials development to achieve radiation hardened fiber optic glasses.
Book Synopsis Fiber Optics in Transient Radiation Fields by :
Download or read book Fiber Optics in Transient Radiation Fields written by and published by . This book was released on 1985 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Fiber optics have been utilized in a variety of sensor and data transmission roles, some of which are complicated by the presence of ionizing radiation. In this paper, transient radiation effects in fibers are reviewed. Both luminescence and absorption processes are discussed in this paper, with emphasis on the latter subject. Most discussions are on effects occurring below 100 ns, with limited data in the microsecond time regime. This paper is intended as a review paper and its scope is restricted to previously published work. Areas that will profit from further study are highlighted.
Book Synopsis NSEP FIBER OPTICS STUDY BACKGROUND REPORT : NUCLEAR EFFECTS ON FIBER OPTIC TRANSMISSION SYSTEMS. by : Joseph A. Hull
Download or read book NSEP FIBER OPTICS STUDY BACKGROUND REPORT : NUCLEAR EFFECTS ON FIBER OPTIC TRANSMISSION SYSTEMS. written by Joseph A. Hull and published by . This book was released on 1987 with total page 105 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Radiation Effects on Fiber Optic Systems and Components by :
Download or read book Radiation Effects on Fiber Optic Systems and Components written by and published by . This book was released on 1988 with total page 600 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Radiation Effects on Fiber Optics and Opto-Electronics by : Information Gatekeepers, Inc
Download or read book Radiation Effects on Fiber Optics and Opto-Electronics written by Information Gatekeepers, Inc and published by . This book was released on 1987 with total page 141 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Study of Fiber Nonlinear Effects on Fiber Optic Communication Systems by : Bo Xu
Download or read book Study of Fiber Nonlinear Effects on Fiber Optic Communication Systems written by Bo Xu and published by . This book was released on 2003 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Proceedings of the Fiber Optics in the Nuclear Environment Symposium 25-27 March 1980. Volume II. Radiation Physics by : R. C. Webb
Download or read book Proceedings of the Fiber Optics in the Nuclear Environment Symposium 25-27 March 1980. Volume II. Radiation Physics written by R. C. Webb and published by . This book was released on 1980 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contents: Radiation-Induced Defect Centers in Fiber Optic Glasses; The Role of the Multidopants Sb/P in Radiation Hardening of Optical Fibers; Radiation Damage of Optical Fiber Waveguides at Long Wavelengths; Temperature Dependence of Radiation Darkening in Optical Waveguides; Radiation Performance of Germanium Phosphosilicate Optical Fibers as a function of Temperature; Fast Recovery in Optical Fibers Exposed to Pulsed Radiation; Short-Term Radiation Effects in Optical Fibers; Radiation Response Measurement of Fibers in the Picosecond Region; Photobleaching Effects in Optical Fiber Waveguides; Electron-Beam Induced Absorption and Hardening in Fiber-Optic Waveguides to 1060-NM Laser Pulses; Characterization of Low-Loss Multimode Optical Fibers for Nuclear Diagnostics; Radiation Degradation and Recovery in Long Fiber-Optics Data Links; Neutron Damage Effects in Ga sub 1-x Al sub x As LEDs; Temperature Dependence of Neutron Damage to Commercial GaAsP LED Devices; Transient Effects of Ionizing Radiation in Si, InGaAsP, GaAlSb, and Ge Photodiodes; and A Radiation-Hardening Scheme for an Analog Fiber-Optic Data Link.
Book Synopsis The Effects of Contaminants on Fiber Optic Connector Radiation Patterns by : G. Kosmos
Download or read book The Effects of Contaminants on Fiber Optic Connector Radiation Patterns written by G. Kosmos and published by . This book was released on 1974 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: The study of how liquid contaminants affect transmission within fiber connectors in installing fiber optic systems has shown that fiber optic connectors which are contaminated by oils and grease generally enhance light transmissions, thus eliminating one of the objections to fiber optic communications. It was found that some of the contaminants that attenuate transmission are opaque and that they can be removed from the connector during normal maintenance. (Author).
Book Synopsis Radiation-induced Transient Attenuation of PCS Fiber by :
Download or read book Radiation-induced Transient Attenuation of PCS Fiber written by and published by . This book was released on 1983 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Some applications of optical fibers require their exposure to intense radiation fields. This exposure can potentially degrade performance of a fiber data link. Research at Los Alamos National Laboratory has recently concentrated on development of an understanding of such radiation effects at short times, less than 100 ns. In previous papers we have identified a particular type of fiber, ITT plastic-clad-silica (PCS) with Suprasil core as optimum for short time radiation-induced attenuation, but that work used very large doses of ionizing radiation, close to 1 Mrad. For these high dose exposures, moderate success in understanding the transient nature of the attenuation was realized with a geminate recombination model. In this paper, we report further studies with ITT PCS fiber over a range of doses and wavelengths. Data on other PCS fibers is included that provide performance comparable to the ITT product. Comparison to several fluorsilicate fibers is also included.
Book Synopsis Overview of Fiber Radiation Effects Testing at the Los Alamos National Laboratory by :
Download or read book Overview of Fiber Radiation Effects Testing at the Los Alamos National Laboratory written by and published by . This book was released on 1983 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Fiber optics offer potential benefits in diagnostic measurements associated with nuclear testing. Such applications require that optical fibers be located in close proximity to a nuclear test and provide a reliable data transmission path during exposure to intense radiation. The Los Alamos effort has thus concentrated on measurement and understanding of radiation effects in optical fibers at very short times (
Book Synopsis Radiation Effects on Transmission in Optical Fiber Systems by : William Hunter Hilarides
Download or read book Radiation Effects on Transmission in Optical Fiber Systems written by William Hunter Hilarides and published by . This book was released on 1981 with total page 51 pages. Available in PDF, EPUB and Kindle. Book excerpt: A study was done of the effects of 14.7 Mev neutrons on transmission in optical fibers. This study was done with monochromatic light in the spectral range from 700 to 1700 nanometers. Of the fibers studied, two were high purity silica fibers, and two were Germanium doped core silica fibers. An important result of the study was that the radiation induced damage was wavelength related. The induced damage decreased rapidly as the wavelength increased from 800 to 1100 nanometers, with minimal damage noted above 1300 nanometers. This trend was due primarily to the energy levels of traps formed as the bombarding neutrons broke bonds within the silica. Several other interesting trends were noted. First, the water content of the fiber affected the amount of induced damage. Second, the method by which the fiber was made affected the damage levels. Third, the dopant used affected the damage levels. These trends deserved further study, but because the data base was so small, more specific conclusions were not possible. (Author).
Book Synopsis Radiation Hardened Fiber Optics for Fusion Reactor Diagnostic Systems. Final Technical Report by :
Download or read book Radiation Hardened Fiber Optics for Fusion Reactor Diagnostic Systems. Final Technical Report written by and published by . This book was released on 1998 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt: This final report comprises a brief synopsis of the following original papers published in refereed journals. For further details, these papers themselves should be consulted. (1) ''Fast-neutron radiation effects in a silica-core optical fiber studied by a CCD-camera spectrometer, '' D.L. Griscom, M.E. Gingerich, E.J. Friebele, M. Putnam, and W. Unruh, Appl. Optics 33, 1022-1028 (1994). (2) ''Radiation hardening of pure-silica-core optical fibers by ultra-high-dose [gamma]-ray pre-irradiation, '' D.L. Griscom, J. Appl. Phys. 77, 5008-5013 (1995). (3) ''[gamma]-radiation resistance of aluminum-coated all-silica optical fibers fabricated using different types of silica in the core, '' D.L. Griscom, K.M. Goland, A.L. Tomashuk, D.V.; Pavlov, and Yu. A. Tarabrin, Appl. Phys. Lett. 69, 322-324 (1996). (4) ''[gamma] and fission-reactor radiation effects on the visible-range transparency of aluminum-jacketed, all-silica optical fibers, '' D.L. Griscom, J. Appl. Phys. 80, 2142-2155 (1996). (5) ''Visible/infra-red absorption study in fiber geometry of metastable defect states in high-purity fused silicas, '' D.L. Griscom, Proc. 13th Int'l Conf. on Defects in Insulating Materials, Wake Forest University, Winston-Salem, NC, July 1996. (6) ''Influence of the cladding thickness on the evolution of the NBOHC band in optical fibers exposed to gamma radiations, '' O. Deparis, D.L. Griscom, P. Megret, M. Decreton, and M. Blondel, J. Non-Cryst. Solids 216, 124-128 (1997).
