Results 211 to 220 of about 28,722 (257)
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OCEANS 82, 1982
Sperry Research Center and Sperry Corporation have been actively developing fiber optic sensors for a variety of military and commercial applications. Multimode technology has been the preferred approach because appropriate fiber optic components are commercially available.
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Sperry Research Center and Sperry Corporation have been actively developing fiber optic sensors for a variety of military and commercial applications. Multimode technology has been the preferred approach because appropriate fiber optic components are commercially available.
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Tapered enlarged ends in multimode optical fibers
Applied Optics, 1982Radiation characteristics of multimode fibers with enlarged tapers were investigated on a number of samples obtained by varying the fiber drawing speed with a given law corresponding to a prefixed taper profile. The characterization of the fibers was made by near- and far-field intensity pattern measurements as well as by measuring the losses ...
Brenci M, Falciai R, Scheggi AM
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Multimode nonlinear optical fiber calorimetry
CLEO 2023, 2023We show that the thermodynamic approach is able to predict the nonlinear interaction forces among different, orthogonally polarized photon gases in optical fibers. Calorimetry experiments demonstrate the validity of the second principle of thermodynamics.
Ferraro, Mario +5 more
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Wavelength multiplexing in multimode optical fibers
Applied Optics, 1977The capacity of optical fiber transmission systems could be increased by multiplexing several signals at different wavelengths on each fiber. This paper considers various multiplex system designs that might be used with multimode fiber transmission systems.
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Femtosecond Extreme Nonlinear Optics with Multimode Fibers
Optica Nonlinear Optics Topical Meeting 2023, 2023We overview the nonlinear spatiotemporal propagation dynamics of femtosecond laser pulses in multimode optical fibers. Whenever the pulse peak power approaches the fiber breakdown threshold, several exotic nonlinear effects are observed.
Mangini, Fabio +3 more
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Fiber optic interferometric sensors using multimode fibers
SPIE Proceedings, 1991We have considered some problems of applicability of multimode optical fibers in various interferometric configurations for optical fiber sensors development. The analysis was based on theoretical and experimental studies of spatial-temporal coherence function propagation in multimode fibers.
Alexander V. Ignatyev +3 more
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Optical fiber grating sensors in multimode fibers
Smart Materials and Structures, 2000We present a novel class of optical fiber sensors based on fiber Bragg gratings written in germanium-doped silica multimode fibers that can be implemented with inexpensive components. The gratings are inscribed by the phase mask technique in 50/125 μm step-index profile fibers and their temperature and strain responses are investigated.
Wei Zhao, Richard O. Claus
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Multimode-optical-fiber Michelson interferometer
Journal of Lightwave Technology, 1983A multimode-optical-fiber Michelson interferometer is constructed by utilizing a fiber-optic directional coupler as a beam-splitting/recombining element, and is used to measure an amplitude of sinusoidal vibration in a homodyne detection scheme. The mixing efficiency in interferometry is discussed on a simplified assumption of the propagating field and
M. Imai, T. Ohashi, Y. Ohtsuka
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Fiber optic multimode displacement sensor
AIP Conference Proceedings, 1996An underwater Optical Motion Sensor (OMS) based on a design first presented by W. B. Spillman, Schlieren multimode fiber‐optic hydrophone, Applied Physics Letters 37(2), 15 July 1980, p. 145–146 is described. The displacement sensor uses the same acoustooptical intensity modulation mechanism as Spillman, however the sensing mechanism is isolated from ...
Karl A. Fisher, Jacek Jarzynski
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Dispersive Multiplexing in Multimode Optical Fiber
Science, 2000Recently developed ideas in the field of wireless communications suggest that the presence of scattering can be used to enhance, rather than degrade, the total information capacity of a transmission system. This concept is applied to data transmission over multimode optical fiber, and the result is an optical multiplexing that can increase the capacity
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