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Multimode Fiber

Multimode Fiber-related patent applications - as published by the U.S. Patent and Trademark Office (USPTO).


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Method for qualifying the effective modal bandwidth of a multimode fiber over a wide wavelength ...
Draka Comteq B.v.
June 22, 2017 - N°20170176285

The invention relates to a method for qualifying the actual effective modal bandwidth of a multimode optical fiber over a predetermined wavelength range, comprising the steps of: carrying out (30) a dispersion modal delay (dmd) measurement of the multimode optical fiber at a single wavelength to obtain an actual dmd plot; generating (32) at least two distinct modified dmd plots from the ...
Single multimode fiber endoscope
The Regents Of The University Of Colorado, A Body Corporat
June 01, 2017 - N°20170153440

Some embodiments of the invention include a multimode fiber endoscope. The endoscope may include an elongated body having a proximal end and a distal end; a multimode fiber disposed within the elongated body and extending from the proximal end to the distal end of the elongated body, the multimode fiber; a light source disposed relative to the proximal end of ...
Multicore/multimode fiber coupling device
Optoquest Co., Ltd
February 16, 2017 - N°20170045687

A device for coupling a multicore/multimode fiber that can transmit a large quantity of information. This multicore/multimode fiber coupling device has a first fiber group (11), a first light converging system (13), a first mode converter (15), a second fiber group (21), a second light converging system (23), and light converging system (33) for multicore fibers. By means of the first mode converter (15), light ...
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Optical fiber
Sumitomo Electric Industries, Ltd.
January 05, 2017 - N°20170003446

An optical fiber comprises a glass fiber which comprises a core and a cladding, a primary resin coating layer which covers the periphery of the glass fiber, and a secondary resin coating layer which covers the periphery of the primary resin coating layer. The glass fiber is a multimode fiber having a core diameter of 40-60 μm and ...
Inspection apparatus and method, lithographic apparatus, lithographic processing cell and device manufacturing method
Asml Netherlands B.v.
December 29, 2016 - N°20160377990

The present invention determines property of a target (30) on a substrate (w), such as a grating on a wafer. An inspection apparatus has an illumination source (702, 710) with two or more illumination beams (716, 716′, 716″, 716′″) in the pupil plane of a high numerical aperture objective lens (l3). The substrate and target are illuminated via the objective lens from different ...
Multimode fiber for modulatable source
Hewlett Packard Enterprise Development Lp
November 24, 2016 - N°20160344478

Examples include generating a signal using a modulatable source. The signal may be propagated using a multi-mode fiber to receive the signal from the modulatable source. The fiber has a diameter d and a far-field divergence angle associated with the propagated signal that corresponds to a product of the diameter (d) and the far-field divergence angle. The product may be ...
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Fiber source with cascaded gain stages and/or multimode delivery fiber with low splice loss
Nlight, Inc.
September 29, 2016 - N°20160285227

An apparatus includes an optical gain fiber having a core, a cladding surrounding the core, the core and cladding defining an optical gain fiber numerical aperture, and a multimode fiber having a core with a larger radius than a radius of the optical gain fiber core, a cladding surrounding the core, the core and cladding of the multimode fiber defining ...
Fiber coupling efficiency of diode lasers
Bae Systems Information And Electronic Systems Integration Inc.
September 15, 2016 - N°20160268762

A system and method for increasing the fiber coupling efficiency of diode lasers is disclosed. The diode laser has a diode pump source for generating a force to pump a laser and a double clad fiber directly coupled to the diode pump source instead of coupling to the multimode fiber. The pumped laser is transmitted directly through the double clad ...
Methods and apparatus for measurement of modal characteristics of multimode fiber using rayleigh scatter
Intuitive Surgical Operations Inc.
September 08, 2016 - N°20160258839

One or more modal characteristics are determined for a waveguide that supports more than two modes. In an example implementation, optical frequency domain reflectometry (ofdr) is used to couple light into the waveguide and detect rayleigh scatter reflections associated with a segment of the waveguide. An original set of rayleigh scatter data associated with the detected rayleigh scatter reflections is ...
A method of characterizing a multimode optical fiber link and corresponding methods of fabricating multimode ...
Draka Comteq B.v.
September 01, 2016 - N°20160254861

The invention concerns a method of characterizing a multimode optical fiber link comprising a light source and a multimode fiber, which comprises: a step (170) of characterizing the multimode fiber using a measurement of the dispersion modal delay (dmd) and delivering fiber characteristic data; a step (171) of characterizing the light source by at least three source characteristic curves showing three parameters ...
Wireless distributed antenna mimo
Draka Comteq B.v.
June 23, 2016 - N°20160182181

The present disclosure relates to system applications of multicore optical fibers. One embodiment relates to a base transceiver station for a wireless telecommunication system comprising a plurality of antenna units arranged in a mimo configuration and adapted for transmission and/or reception of radio-frequency signals, an optical transmitter in the form of an electro-optic conversion unit for each of said ...
Moatless bend-optimized multimode fiber
Corning Incorporated
December 31, 2015 - N°20150378092

An optical fiber including a multimode core having a radius, r1, and a maximum relative refractive index, α1max, at a wavelength λ0, an inner clad region surrounding the core and having a radial thickness, t2, and a minimum relative refractive index, Δ2min, of about 0. 0% at a wavelength of λ0, and an outer clad layer, which ...
Multimode optical fiber transmission system including single mode fiber
Corning Incorporated
November 19, 2015 - N°20150333829

Some embodiments of the disclosure relate to an optical transmission system that operates at a wavelength in the range from 950 nm to 1600 nm and that employs a single-mode optical transmitter and an optical receiver optically coupled to respective ends of a multimode fiber designed for 850 nm multimode operation. The optical transmission system also employs at least one single mode fiber ...
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N-input receiver: rfog obi mitigation with retransmission
Arris Enterprises, Inc.
October 22, 2015 - N°20150304034

A multimode combiner or coupler (mmc) may combine the inputs into a larger core multimode fiber. The multimode combiner may be combined with a re-transmitting laser for detecting and re-transmitting signals. Thus, the multi-mode combiner may detect and combine input signals, and then retransmit the detected, combined signal. The detection can be implemented with multiple single mode fibers to small ...
Method and apparatus for a photoacoustic probe using a multimode fiber
Ecole Polytechnique Federale De Lausanne (epfl)
September 24, 2015 - N°20150265157

This invention is a method and apparatus to pick up a photoacoustic signal purely via optical means and via an endoscope. The photoacoustic endoscope invention relies only on optical excitation and detection methods. A light focus spot generates a photoacoustic signal at the distal end of a multimode fiber endoscope. A membrane is positioned at the distal end whose vibration ...
Broadband multi-mode optical fibers with flat-zone in dopant concentration profile
Ofs Fitel, Llc
September 10, 2015 - N°20150253499

Described is a design approach to fabricating broadband graded-index multimode fibers where the concentration profile of at least one dopant in the core region includes at least one flat-zone. Designs for use in cwdm applications are also disclosed.
Displays employing multimode optical fiber and low-speckle light sources
Jgm Associates, Inc.
June 18, 2015 - N°20150168738

An apparatus comprising a visible light source(s), multimode optical fiber(s), light coupler(s), an optional spatial light modulator(s), and an optional projection lens(es). The light source has a 1/e half-width emission bandwidth. The light coupler couples the light source to the multimode optical fiber(s) such that objective speckle contrast is reduced. The multimode optical fiber(...
Method for brightness enhancement and modes manipulation of a multimode optical fiber
Jgm Associates, Inc.
May 14, 2015 - N°20150131936

The invention relates to adaptive optics techniques applied to alter the modal structure of light propagating in an optical fiber. In particular the invention relates to altering the modal structure in a multimode beam propagating in a multimode fiber by lowering the number of higher modes. The method comprises combining a wavefront sensor and/or a power sensor with a ...
Universal optical fibers for optical fiber connectors
Corning Cable Systems Llc
March 05, 2015 - N°20150063754

An optical fiber for use as a stub fiber in an optical fiber connector is disclosed. The optical fiber is configured with a segmented core that includes a single-mode segment with a step-index profile and at least one multimode segment having at least one alpha profile. A connector that employs the stub fiber can connect to both a single mode ...
System for transmission over a multi-mode and/or multi-core optical fiber
Corning Cable Systems Llc
October 23, 2014 - N°20140314410

A transmitter for an optical telecommunication system on a weakly multimode fiber is disclosed. One aspect is a transmitter including an encoder transforming each block of symbols to be transmitted into a code matrix, each element of the matrix being relative to a time of use and to a propagation mode of the weakly multimode fiber. The transmitter can include ...
Method for single-fiber microscopy using intensity-pattern sampling and optimization-based reconstruction
Corning Cable Systems Llc
August 21, 2014 - N°20140235948

A method for imaging an object with resolution that exceeds the number of spatial modes per polarization in a multimode fiber is disclosed. In some embodiments, the object is interrogated with a plurality of non-spot-sized intensity patterns and the optical power reflected by the object is detected for each intensity pattern. The plurality of optical power values is then used ...
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