The invention relates to phosphate-based glasses suitable for use as a solid laser medium, doped with Er3+ and sensitized with Yb, in “eye-safe” applications. In particular, the invention relates to improving the physical properties of such phosphate-based laser glass composition, particularly with regards to strength of the glass structure and improved thermal shock resistance.

A quantum dot (“QD”) glass aging device including a bottom part including a flat surface defined by a first direction and a second direction intersecting the first direction; a side wall part including a side surface defined by the first direction and a third direction intersecting the bottom part, and a seating part disposed between the bottom part and the side wall part. The seating part includes a plurality of protrusion parts extending in the first direction and arranged in the second direction. A plurality of QD glasses is arranged on the plurality of protrusion parts. A plurality of light sources is disposed in the plurality of grooves defined between the protrusion parts and between the side wall part and a first protrusion part adjacent to the side wall part. Heights of upper surfaces of the protrusion parts gradually decrease from the side wall part to the bottom part.

A quantum dot (“QD”) glass aging device including a bottom part including a flat surface defined by a first direction and a second direction intersecting the first direction; a side wall part including a side surface defined by the first direction and a third direction intersecting the bottom part, and a seating part disposed between the bottom part and the side wall part. The seating part includes a plurality of protrusion parts extending in the first direction and arranged in the second direction. A plurality of QD glasses is arranged on the plurality of protrusion parts. A plurality of light sources is disposed in the plurality of grooves defined between the protrusion parts and between the side wall part and a first protrusion part adjacent to the side wall part. Heights of upper surfaces of the protrusion parts gradually decrease from the side wall part to the bottom part.

The invention relates to glass ceramics and glasses with a europium content, containing the following components:

TABLE-US-00001 Component wt.-% SiO.sub.2 30.0 to 75.0 Al.sub.2O.sub.3 10.0 to 45.0 Europium, calculated as Eu.sub.2O.sub.3 0.05 to 5.0

and which are suitable in particular for the production of dental restorations, the fluorescence properties of which largely correspond to those of natural teeth.

The invention relates to glass ceramics and glasses with a europium content, containing the following components:

TABLE-US-00001 Component wt.-% SiO.sub.2 30.0 to 75.0 Al.sub.2O.sub.3 10.0 to 45.0 Europium, calculated as Eu.sub.2O.sub.3 0.05 to 5.0

and which are suitable in particular for the production of dental restorations, the fluorescence properties of which largely correspond to those of natural teeth.

The technology of this application relates to the field of communication technologies, and an optical fiber raw material composition, an optical fiber, and an optical fiber product. The optical fiber raw material composition includes components of the following molar percentages: AlF.sub.3 10%-50%, BaF.sub.2 3%-20%, CaF.sub.2 3%-20%, YF.sub.3 1%-15%, SrF.sub.2 3%-20%, MgF.sub.2 3%-20%, and TeO.sub.2 1%-35%. The optical fiber prepared by using the optical fiber raw material composition provided in this disclosure can be used in aspects such as a mid-infrared band transmission optical fiber, an optical fiber amplifier, a fiber laser, and an optical fiber sensor.

A tamper-evident glass and methods of using the tamper-evident glass are provided herein. The tamper-evident glass comprising at least a first plurality of tamper-evident elements, which may be unique or near unique to each manufacturing of tam per-evident glass. The initial state of tamper-evident glass and positioning of the plurality of tamper-evident elements may be mapped through digital scanning to create a digital file of the current state of the tamper-evident glass. The tamper-evident glass may be scanned again to create a new digital file for comparison and to determine if a tampering event has occurred. The tamper-evident elements may include any combination of inorganic fluorescent material, crystals grown through nucleation and crystallization, or added colorants.

An example glass composition comprises rare earth content (e.g., rare earth oxides, elements, and/or ions) of from about 0.5 mol % to about 20 mol %. The glass composition may have a liquidus temperature that is within a specified range, a softening point that is within a specified range, a working point that is within a specified range, and/or a coefficient of thermal expansion (CTE) that is within a specified range.

An example glass composition comprises rare earth content (e.g., rare earth oxides, elements, and/or ions) of from about 0.5 mol % to about 20 mol %. The glass composition may have a liquidus temperature that is within a specified range, a softening point that is within a specified range, a working point that is within a specified range, and/or a coefficient of thermal expansion (CTE) that is within a specified range.

Provided is a wavelength conversion member that can easily reduce the leakage of excitation light in an ultraviolet range to the outside. A wavelength conversion member for use to convert excitation light having a wavelength of 250 to 280 nm to visible light contains a glass matrix and a phosphor dispersed in the glass matrix, and a total light transmittance of the glass matrix at a thickness of 1 mm is 0.1 to 80% at a wavelength of 250 to 280 nm.