Journal ArticleDOI
Applications of GRIN-rod lenses in optical fiber communication systems.
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TLDR
In this article, the authors present a detailed review of the performance of various GRIN-rod lens devices, including connectors, attenuators, directional couplers, switches, isolators and wavelength division multiplexers.Abstract:
Graded-refractive-index-rod lenses (GRIN-rod lenses) have a number of features that make them particularly suitable for use in optical devices for manipulating and processing the optical signals in fiber communication systems. Such lenses can be cemented directly to the other elements of a device, thus giving a structure that is compact, solid, stable, and rugged. They also have significantly smaller aberrations than equivalent simple homogeneous lenses, and this results in lower insertion losses. Designs for various GRIN-rod lens devices, including connectors, attenuators, directional couplers, switches, isolators and wavelength-division multiplexers are reviewed. A consistent set of loss estimates is provided for all the device designs considered.read more
Citations
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Journal ArticleDOI
Stacked planar optics: an application of the planar microlens
TL;DR: This paper presents a new development of the distributed-index planar microlens of 2.5-3-mm focal length and 0.15 N.A. and shows that it is usable with optical components in fiber communications and proposes a concept of stacked planar optics consisting of a stack of arrayed planarmicrolenses and other optical components.
Journal ArticleDOI
General formula for coupling-loss characterization of single-mode fiber collimators by use of gradient-index rod lenses
Shifu Yuan,Nabeel A. Riza +1 more
TL;DR: A general formula for determining the coupling loss between two single-mode fiber collimators with the simultaneous existence of separation, lateral offset and angular tilt mis alignment, and spot-size mismatch is theoretically derived by use of the Gaussian field approximation.
Patent
Integrated bi-directional axial gradient refractive index/diffraction grating wavelength division multiplexer
TL;DR: In this article, the authors proposed a wavelength division multiplexer that integrates an axial gradient refractive index element with a diffraction grating to provide coupling from a plurality of input optical sources (each delivering a single wavelength) which are multiplexed to a single polychromatic beam for output to an output optical receiver.
Patent
Tilt adjustable optical fibre connectors
TL;DR: In this article, an adjustable connector for optically connecting a pair of optical fibres in end-to-end relation, whereby insertion and tilt losses at the connector are minimized, is disclosed.
Journal ArticleDOI
Foundations for low-loss fiber gradient-index lens pair coupling with the self-imaging mechanism
Martin van Buren,Nabeel A. Riza +1 more
TL;DR: For the first time to the authors' knowledge, the mathematical foundations are laid for employing self-imaging-type fiber collimators in SMF-based free-space systems allowing optimal design for ultra-low-loss coupling.
References
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Journal ArticleDOI
Wavelength multiplexing in multimode optical fibers.
TL;DR: This paper considers various multiplex system designs that might be used with multimode fiber transmission systems, and the required multiplexer size and material properties are calculated as functions of the basic parameters of the fiber system.
Journal ArticleDOI
Offset and tilt loss in optical fiber splices
TL;DR: In this article, the authors found that offsets of 0.1 of the core radius (or tilts of the fiber numerical aperture) cause an average loss of 1.1 dB in the case of steady-state conditions, and between 0.34 and 0.38 dB if the power distribution is assumed as uniform.
Journal ArticleDOI
Color-center laser generates picosecond pulses and several watts cw over the 1.24 - 1.45-Mu m range.
TL;DR: A laser utilizing F2+ centers in KF and yielding pulses 3–5 psec wide continuously tunable over the 1.24–1.45-μm range is described, finding that time-average mode-locked output power was at least half the corresponding cw value.
Journal ArticleDOI
Multireflection optical multi/demultiplexer using interference filters
TL;DR: In this article, a multireflection multi/demultiplexer using interference filters is proposed, where light waves of different wavelengths are combined or separated while they propagate between two filter arrays.
Journal ArticleDOI
Optical multiplexer for multimode fiber transmission systems
W. Tomlinson,G. D. Aumiller +1 more
TL;DR: In this paper, an optical multiplexer for use with multimode optical fibers was constructed and tested using a blazed plane reflection grating with a single GRIN-rod lens.