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4229067 |
Optical waveguide mode scrambler
An optical waveguide mode scrambler including a length of high-alpha optical waveguide optically coupled to a length of low-alpha optical waveguide which provides efficient spatial and angular...
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4229070 |
High bandwidth optical waveguide having B.sub.2 O.sub.3 free core and method of fabrication
A method of forming a preform or blank for a high bandwidth gradient index optical filament, the preform itself and the resulting optical filament is disclosed. The preform which ultimately forms...
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4222631 |
Multicomponent optical waveguide having index gradient
An optical waveguide for a communication system includes a graded index core formed from at least three glass-forming compounds with a profile having at least two α-type index profile terms. The...
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4221825 |
Continuous production of synthetic silica doped with fluorine
The present invention relates to a process for the continuous manufacture of vitreous synthetic silica doped with fluorine. This process consists of decomposing a silicon compound free of hydrogen...
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4212660 |
Method for making multiple mode waveguide having cylindrical perturbations
A multiple mode optical waveguide includes a glass core and a glass cladding around the core. In order to promote coupling between guided modes of light propagation, the core has cylindrical...
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4210386 |
Fluorine out-diffused optical device and method
A fluorine containing silicate glass substrate is heated to a temperature sufficiently high to permit fluorine to out-diffuse from the surface thereof. A surface region is formed having a gradient...
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4205900 |
Optical cables
Optical fibres and optical cables of improved bandwidth, especially intended for use in a communications system. Over-compensated and under-compensated fibres or cable sections are connected...
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4205901 |
Limited mode optical fiber
A single mode optical fiber having a central core region of uniform composition and thickness and core end regions each having a core with a graded composition and increasing thickness towards the...
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4204745 |
Optical fiber
In a graded index optical fiber whose refractive index distribution (n) at the radial length r is given by ##EQU1## where (n 0 ) is the refractive index at the core axis, (a) is the core radius, α...
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4201447 |
Termination for graded index fiber
A short length of step index fibre is placed in front of graded index fibre. Walls of the step index fibre form multiple images of its entrance face which are imaged by the graded index fibre to...
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4194807 |
Optical fiber wave-guides for signal transmission comprising multiple component glass with an adjusted expansion co-efficient between the core and mantle
The present invention discloses an optical fiber wave-guide for signal transmission in which the signal fiber has a linear thermal expansion co-efficient in all of the fiber elements above 15×10...
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4189208 |
Zinc chloride optical fibers for transmission in the infrared
ZnCl 2 optical fibers are advantageously used for transmission of radiation in the infrared portion of the spectrum. Losses as low as 10 -3 dB/km may be obtained when radiation of wavelength...
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4188089 |
Optical fibers having high infrared transmittancy
Optical fibers having high infrared transmittancies are produced by chemical vapor deposition of vitreous layers composed predominantly of anions S, Se and/or Te onto tubes or rods. Cations are Ge,...
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4185890 |
Optical transmission line
In order to expand the product between the transmission length and the transmission bandwidth of an optical fiber for use in the optical communication and to facilitate the connection between the...
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4184859 |
Method of fabricating an elliptical core single mode fiber
A method of fabricating a low loss single mode optical fiber having an elliptically shaped core comprising subjecting a multi-layered coated substrate having at least a barrier, cladding and core...
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4183620 |
Joint doped porous glass article with high modifier concentrations
A glass composition having at least 85 mole percent of SiO 2 , where the improvement comprises at least 7 wt percent of at least one member selected from the group consisting of PbO and Bi 2 O 3 ...
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4181403 |
Optical fiber with compression surface layer
A glass dielectric fiber waveguide with a composition profile varying radially from the center to the surface, the composition profile causing a surface layer which is in compression, said...
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4179188 |
Gradient optical fiber
A gradient optical fiber with an optimized index of refraction profile characterized by the normalized difference in the index of refraction Δ is in a range of 0.005 to 0.011, with -(k o ...
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4176911 |
Graded index optical fiber
A graded index, multimode optical waveguide. The waveguide is characterized by a graded profile region, followed by an abrupt drop in index, then a region of constant index. At predetermined...
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4167305 |
Optical transmission fiber
An optical transmission fiber having improved mechanical strength and suitable for use in optical communication comprising an optical fiber having formed thereover at least one layer of a...
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4163601 |
Multimode waveguide with enhanced coupling with guided modes
In a multimode optical waveguide, coupling is promoted among guided modes while coupling to unguided modes is suppressed. The core includes perturbations having a power spectrum which decreases...
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4159863 |
Coupling of optical glass fibres
The end of a glass fibre of the graded or at least stepped, index type, or in the case of a clad fibre, the end of its core, is etched with an etchant which varies in etching power according to the...
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4158479 |
Gradient fiber
A gradient optical fiber has an index of refraction profile according to n 2 (r) =n 0 2 (1-2Δ((r/a) α -A((r/a) α -(r/a) 2 α))) and has decreased differences for transit times of different...
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4154500 |
Exposure optical system for electrostatic copying machine or the like
In an electrostatic copying machine, a light source radiates an elongated, narrow beam of light onto an original document which is moved perpendicular to the beam of light for scanning. A plurality...
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4152044 |
Galium aluminum arsenide graded index waveguide
A double heterostructure light emitting device has a graded index optical waveguide formed integrally therein. The integrally formed waveguide collects light from the heterojunction and directs the...
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4140505 |
Method of manufacturing a limited mode optical fiber
A single mode optical fiber having a central core region of uniform composition and thickness and core end regions each having a core with a graded composition and increasing thickness. The fiber...
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4134639 |
Optical path-length equalizer with graded refractive index
Signals, especially short pulses, are transmitted by way of cascaded light guides with internally reflecting boundaries (i.e. fibers or foils) between which a transparent body of graded refractive...
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4123483 |
Manufacturing method of an optical waveguide
A method of manufacturing an O-ring type optical waveguide wherein a layer of fused silica is formed on the smooth cylindrical surface of an elongated member of fused silica and thereafter a thin...
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4111525 |
Silica based optical fiber waveguide using phosphorus pentoxide and germanium dioxide
An optical fiber waveguide is disclosed wherein germanium dioxide (GeO 2 ) and phosphorus pentoxide (P 2 O 5 ) are radially graded in the core of the optical fiber for the purpose of achieving...
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4106847 |
Noncircular symmetric optical fiber waveguide having minimum modal dispersion
An optical fiber waveguide is disclosed wherein the cladding surrounds a fiber core having a noncircularly symmetric cross section. Equations are presented which dictate the value of the index of...
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4106850 |
Optical fiber with graded index core and pure silica cladding
An optical fiber having three dopants in the core of the fiber and a pure silicon dioxide cladding is disclosed. Phosphorus pentoxide and germanium dioxide are radially graded in the core of an...
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4105283 |
Compensation for material dispersion in optical fibers
It has been found that in a profiled optical waveguide for guiding a finite spectrum of light, reduction of total dispersion is possible by forming the overall profile in the waveguide as a...
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4099835 |
Optical fibers with helical gradations in composition
This application discloses a technique for producing optical fibers with longitudinal variations in index of refraction. The deposition apparatus is arranged to allow for the formation of an...
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4082420 |
An optical transmission fiber containing fluorine
A process for producing an optical transmission fiber is provided which comprises feeding highly pure halides, hydrides or organic compounds of Si and B by way of carrier gas on the outer surface...
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4077699 |
Optical devices
An opto-electronic element consists of a dielectric optical waveguide having a single crystal core of meta-nitroaniline. The element is made by feeding molten meta-nitroaniline into a hollow fibre...
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4076380 |
Graded index optical fiber
A graded index optical fiber with a structure which results in improved pulse dispersion characteristics is disclosed. The refractive index properties of the fiber core may be defined in terms of...
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4070091 |
Optical fibre with enhanced security
An optical fibre has a light conducting core surrounded by first and second cladding layers of sequentially lower refractive index. A data-carrying signal can be propagated in the core and a...
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4057320 |
Optical fiber waveguide having minimum modal dispersion
A graded index optical fiber waveguide for use in an optical communication system is disclosed. The waveguide is a circular symmetric fiber having a cladding with an index of refraction n 2 ...
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4053205 |
Optical fiber having reduced dispersion
Dispersion is reduced in a graded index optical fiber having a finite number of core layers by introducing slow longitudinal variations into the index of refraction of each layer. The index of...
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4033667 |
Multimode optical fiber
A multimode optical fiber waveguide with graded refractive index for lessening modal dispersion depends upon simultaneous grading of both P 2 O 5 and B 2 O 3 within an otherwise generally...
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4025156 |
Graded-index fiber for multimode optical communication
Graded-index fibers, which are the most promising for first-generation optical communication links, are improved for multimode transmission by employing two or more glassy dopants in the core...
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4019805 |
Optimized parabolic-index optical fiber communication system with incoherent light source
The disclosed optical fiber communication system employs a fiber with a core having an index of refraction graded in an approximately parabolic fashion and a light-emitting diode joined directly to...
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4017288 |
Method for making optical fibers with helical gradations in composition
This application discloses a technique for producing optical fibers with longitudinal variations in index of refraction. The deposition apparatus is arranged to allow for the formation of an...
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4006962 |
Communication system having low dispersion glass optical waveguide
An optical waveguide for use in an optical communication system employing a broad spectral source. Mode coupling is present in the propagation of optical signals in the waveguide, and the...
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4000936 |
Optical fiber jacket designs for minimum distortion loss
Substantial reductions in the distortion loss in an optical fiber waveguide due to the influence of random external forces can be realized by encasing the fiber in a properly designed jacket. In...
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3999835 |
Dielectric optical waveguides
Dielectric optical waveguides can be made having a core of vitreous silica doped with nitrogen in the form of silicon nitride, and a cladding of pure vitreous silica. Silicon nitride may be present...
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3999834 |
Method for producing optical fibers and resulting fibers
Light-focussing type optical fibers are formed from concentric circular sheath-core composite fibers composed of a sheath forming polymer having a defined solubility parameter and a defined...
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3989350 |
Multimode optical fiber
A multimode optical fiber waveguide with graded refractive index for lessening modal dispersion with the gradient produced at least in part by radially decreasing boron oxide content outwardly from...
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3981707 |
Method of making fluorine out-diffused optical device
A fluorine containing silicate glass substrate is heated to a temperature sufficiently high to permit fluorine to out-diffuse from the surface thereof. A surface region is formed having a gradient...
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3942867 |
Optical memory apparatus
An optical memory includes a light beam source, converting means for causing the light beam to take on a predetermined spot size, and a light-focusing fiber guide having a refractive index...
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