Schott Corporation

Schott Ag

Scott Technologies, Inc.

Universiteit Twente

Mark J Davis

Paula Vullo

Joseph S Hayden

Martin Letz

Eric Hector Urruti

Bernd Hoppe

Bianca Schreder

Sally Pucilowski

Nathan Aaron Carlie

Bernd Ruedinger

Simi George

Daniela Seiler

Peter Blaum

Elizabeth Chase

Pepijn Pinkse

Maria-Louisa Aigner

Katherine Ann Gudgel

Allard Mosk

William H James, Iii

Samuel David Conzone

Athermal glasses and athermal systems for infrared optical components and systems are disclosed.

Athermal glasses and athermal systems for infrared optics

An apparatus for authenticating an optical key and an apparatus for generating a random number from an optical key are provided. The optical key is used for reliable authenticatability and the random number is stable when or after the optical key is exposed to an external influence such as, but not limited to, a physical or chemical stimulus including a different ambient condition, a mechanical stress, or chemical contact.

Optical key protected authentication and encryption

The invention relates to an optical scattering element suitable for dispersing or scattering light transmitted by optical device by Mie scattering. The optical scattering element comprises a phase-separated or porous borosilicate glass having dispersed phase particles with a particle size of 200 to 500 nanometers or pores with a size of 200 to 500 nanometers, at a number density of 10to 10mm. The optical scattering element can be prepared by subjecting a borosilicate glass to a controlled heat treatment to induce phase separation, and then optionally leaching out one of the phases with an acid leach. The optical scattering element can be, for example, attached to an end of an optical fiber or bundle of optical fibers. The invention also relates to a method of dispersing or scattering light by transmitting the light through the optical scattering element.

Optical element for Mie scattering light from an optical fiber

The invention relates to an optical fiber comprising a core and a cladding, wherein the core is made of a glass composition having a near-zero electrostrictive coefficient M, to reduce the effect of stimulated Brillouin Scattering (SBS). The invention further relates to a compensation fiber segment for connection to a silica optical fiber, the compensation fiber segment being made of a glass composition having an electrostrictive coefficient that opposes that of the silica optical fiber so that an acoustic wave transmitted to compensation fiber segment from the silica optical fiber will generate an acoustic wave within the compensation fiber segment that is about 180 degrees out of phase with the that acoustic wave transmitted from the silica optical fiber, thereby minimizing the effect of stimulated Brillouin Scattering.

Optical fiber for the reduction of stimulated Brillouin scattering in high-power applications

A piezoelectric glass ceramic represented by the formula(MO)-(MO)&#x2014;SiOwherein Mis one or more metals and/or metalloids, Mis one or more metals and/or metalloids, x is a value equal to the valence of M, and y is a value equal to the valence of M. The piezoelectric glass ceramic has a total alkali metal concentration of less than about 1000 parts per million by weight (ppmw). A process of preparing a piezoelectric glass ceramic and a piezoelectric glass ceramic body prepared therefrom.

Piezoelectric glass ceramic compositions and piezoelectric devices made therefrom

Disclosed are processes for preparing conductive glass-ceramic membranes and methods of using them in hydrogen or proton separation.

Glass-ceramic membranes

Discloses are processes for preparing conductive glass-ceramics employ segregation or ion exchange.

Processes for preparing electrically-conductive glass-ceramics

The process of making the glass-ceramic includes ceramicizing a starting glass at a heating or cooling rate during the ceramicization of at least 10 K/min, so that the glass-ceramic contains at least 50% by volume of ferroelectric crystallites with a maximum diameter of from 20 to 100 nm and not more than 10% by volume of nonferroelectric crystallitesis. The glass ceramic produced by the process contains no pores or not more than 0.01% by volume of the pores and a value of e'&#xb7;Vof the glass-ceramic is at least 20 (MV/cm), wherein e&#x2032; is the dielectric constant at 1 kHz and Vis the breakdown voltage per unit thickness. The ferroelectric crystallites preferably have a perovskite structure and are composed of substantially pure or doped BaTiOand/or BaTiO.

Process of producing a glass-ceramic, the glass-ceramic made therby and its uses

A translucent piezoelectric glass ceramic is disclosed. The glass ceramic is prepared from a precursor glass by a ceraming process, using a temperature gradient to effect the precipitation of non-ferroelectric piezo-active crystallites from the precursor glass with a preferred direction of orientation and having an average crystal size of less than 1 micrometer. Alternatively, a translucent piezoelectric glass ceramic comprising ferroelectric crystallites may be prepared by poling. In this case the crystal size is controlled to be smaller than 90 nanometers but preferably larger than 10 nanometers.

Translucent piezoelectric glass ceramic

A method for determining the thermal expansion coefficient of a substance comprises, determining at each of two or more temperatures the absolute position of more than one resonant interference peaks of a Fabry-Perot etalon whose optical path is defined by said substance and calculating said coefficient from observed difference(s) in wavelength or frequency of said positions at said two or more temperatures.

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Clarks Summit, PA, United States of America

Mark J Davis