Corning Incorporated

Joohyun Koh

Ming-Jun Li

Xin Chen

Daniel Aloysius Nolan

Ji Wang

George Edward Berkey

Luis Alberto Zenteno

Donnell Thaddeus Walton

Anping Liu

Prantik Mazumder

Kevin Wallace Bennett

Keith Leonard House

Jean-Philippe J De Sandro

Dana Craig Bookbinder

Robert R Alfano

Jianguo Wang

Alan Frank Evans

William Allen Wood

Timothy Leonard Hunt

Christine L Tennent

Henry Sztul

Deborah Lynn Marlatt

Julie E Caplen

Jean-Philippe J deSandro

Dual coated optical fibers and methods for forming dual coated optical fibers are disclosed herein. The dual coated optical fibers include a glass fiber comprising a core region, a cladding region and a dual coating layer surrounding the glass fiber. The dual coating layer includes an inner coating and an outer coating. The inner coating surrounds the glass fiber and includes a first polyimide material. In one embodiment the first polyimide material also includes an adhesion promoter. The outer coating surrounds and is in direct contact with the inner coating and includes a second polyimide material having a decomposition threshold temperature greater than the first polyimide material. The second polyimide material may also have a modulus of elasticity greater than the first polyimide material and a moisture uptake lower than the first polyimide material.

Dual coated optical fibers and methods for forming the same

A large-mode-area (LMA) optical fiber () that operates as a single-mode optical fiber. The optical fiber includes a core region () surrounded by an inner cladding (), which in turn is surrounded by an outer cladding (). The inner cladding includes at least one up-doped ring region (R). The ring region is configured to form a large attenuation differential between the higher-order modes and the fundamental mode so only that the fundamental mode remains traveling in the optical fiber. If necessary, the optical fiber can include a bend (B) having a select 'resonant' bend diameter (DB) that increases the relative attenuation of the fundamental and higher-order modes. The optical fiber supports an effective mode field diameter (MFD) of up to 40 &#x3bc;m to 50 &#x3bc;m. As a result, detrimental non-linear effects are suppressed, which allows the optical fiber to carry substantially more optical power than conventional LMA optical fibers. The LMA optical fiber is thus eminently suited for a number of optical-fiber-based applications calling for high optical power, such as fiber lasers and pump sources for wavelength conversion.

Large mode area optical fiber

A method for making low PMD fiber comprising the steps of: (i) making an initial fiber preform; (ii) modifying said initial fiber preform to introduce higher birefringence than that of the initial fiber preform into modified preform; and (iii) drawing an optical fiber from the modified preform and bi-directionally spinning the drawn fiber during draw.

Ultra low PMD fibers and method of making

Generation of a cylindrically polarized light beam, and in particular, a hybrid-azimuthal-radial polarization beams, called HARP modes, generated from an input linearly polarized Gaussian beam using a spun optical waveguide device is taught. The HARP modes are comprised of hybrid-azimuthal polarization (HAP) and hybrid-radial polarization (HRP) superposition modes. These beams possess a non-zero local angular momentum density that is spatially varying and a zero total angular momentum.

+cylindrical polarization beams

A detection system comprising: (i) an optical fiber, the optical fiber having (a) a length L&#x2267;1 km; (b) beat length between 10 m and 100 m; and (c) beat length uniformity over any distance of at least 100 m within the length L is characterized by standard deviation &#x3c3;, where |&#x3c3;|&#x2266;10 m; (ii) an OTDR coupled to the fiber and including (a) a radiation source providing pulsed radiation to the fiber, (b) a detection system capable of detecting radiation that is backscattered back through the fiber; and (iii) at least one polarizer situated between the fiber and the detector, such that the backscattered radiation passes through the polarizer before reaching the detector.

Detection system and optical fiber for use in such system

A double-clad optical fiber includes a core, an inner cladding and an outer cladding of silica-based glass. The core may have a radius of less than about 5 &#x3bc;m, a first index of refraction nand does not contain any active rare-earth dopants. The inner cladding may surround the core and includes a radial thickness of at least about 25 &#x3bc;m, a numerical aperture of at least about 0.25, and a second index of refraction nsuch that n&#x3c;n. The relative refractive index percent (&#x394;%) of the core relative to the inner cladding may be greater than about 0.1%. The outer cladding may surround the inner cladding and include a radial thickness from about 10 &#x3bc;m to about 50 &#x3bc;m and a third index of refraction nsuch that n&#x3c;n. The relative refractive index percent (&#x394;%) of the inner cladding relative to the outer cladding may be greater than about 1.5%.

Double-clad optical fibers and devices with double-clad optical fibers

According to one example of the invention an optical fiber comprises: (i) a core comprising of Al doped silica having a first index of refraction n; (ii) at least one silica based cladding surrounding the core and having a second index of refraction n, such that n&#x3e;n; (iii) a hermetic carbon based coating surrounding said cladding, said hermetic coating being 300 nm-1000 nm thick; and (iv) a second coating surrounding said hermetic coating, said second coating being 5 &#x3bc;m to 80 &#x3bc;m thick.

Aluminum doped optical fiber

An optical fiber, comprising: (i) a core having a core center and a radius or a width a, (ii) a cladding surrounding the core, and (iii) at least one stress member situated proximate to the fiber core within the cladding, said stress member comprising silica co-doped with F and at least one dopant selected from the list consisting of: GeO, PO, YO, TiOand AlO,

Polarization maintaining and single polarization optical fiber

According to one example of the invention an optical fiber comprises: (i) a silica based core, said core having a core diameter greater than 80 &#x3bc;m and a numerical aperture NA&#x2267;0.24; and (ii) a silica based cladding in contact with and surrounding the core and having a second index of refraction n, such that n&#x3e;n; wherein the cladding includes B and F. Preferably the numerical aperture NA is at least 0.3.

Optical fiber and a method of making

An optical fiber includes a core and a cladding, said cladding having a refractive index na first coating directly contacting the cladding of said fiber, said coating having a thickness of less than 10 microns, said coating having a refractive index delta %=100&#xd7;(n&#x2212;n)/2nless than &#x2212;1 percent. In another aspect, an optical fiber includes a core and a cladding, said cladding having a refractive index n, a first coating directly contacting the cladding of said fiber, said fiber comprising a glass diameter less than 100 microns, said coating having a thickness of at least 8 microns, said coating having a refractive index delta %=100&#xd7;(n&#x2212;n)/2nless than &#x2212;1 percent.

Low bend loss coated optical fiber

A method for measuring fundamental mode cutoff wavelength of single polarization fiber comprising: (i) launching pulsed light of at least one wavelength &#x3bb;into one end of the single polarization fiber; (ii) measuring backscattered light intensity corresponding to said wavelength to obtain the backscattered light intensity as a function of fiber position, wherein the backscattered light propagates through the same end of the fiber; and (iii) determining at least one cutoff wavelength and the corresponding position within said fiber for the cutoff wavelength, based on a specified threshold light intensity level.

Single polarization fiber and method of evaluating fiber cutoff wavelengths using optical time domain reflectometry

An optical fiber comprising: (i) a silica based passive core having a first index of refraction n; (ii) a silica based cladding surrounding the core and having a second index of refraction n, such that n&#x3e;n, said cladding having at least one stress rod and at least one air hole extending longitudinally through the length of said optical fiber; and (iii) wherein said optical fiber supports a single polarization mode or poses polarization maintaining properties within the operating wavelength range.

Optical fiber with plurality of air holes and stress rods

An optical fiber including: (i) a silica based, rare earth doped core having a first index of refraction n; and (ii) at least one silica based cladding surrounding the core and having a second index of refraction n, such that n&#x3e;n, said cladding having a plurality of stress rods and a plurality of air holes extending longitudinally through the length of said optical fiber; wherein said optical fiber supports a single polarization mode or poses-polarization maintaining properties within the operating wavelength range.

Growing community of inventors

Painted Post, NY, United States of America

Joohyun Koh