Abstract:
In accordance with the present invention, there is an optical amplifier fiber comprising a core manufactured from a phosphate glass doped with a rare earth element and a cladding manufactured from a phosphate glass surrounding the core. The core has a radiative lifetime in the range of 7 to 9 milliseconds at 1535 nm, a fluorescence lifetime of greater than 7.5 milliseconds at 1535 nm. The optical amplifier fiber has a diameter ratio in the range of 0.036 to 0.044, a transformation point difference of the core and the cladding, measured in (°C), less than 5%. Further, the optical amplifier fiber has a coefficient of thermal expansion, measured in (/°C), difference between the core and cladding is less than 2% and an absorption cross section in the range of 0.60 x 10 m to 0.72 x 10 m , in the range of 1530 nm to 1540 nm.
Abstract translation:根据本发明,存在一种光放大器光纤,其包括由掺杂有稀土元素的磷酸盐玻璃制成的芯和由围绕芯的磷酸盐玻璃制成的包层。 核心在1535 nm处具有7至9毫秒范围内的辐射寿命,在1535 nm处的荧光寿命大于7.5毫秒。 光放大器光纤的直径比在0.036至0.044的范围内,以(℃)测量的芯和包层的相变点差小于5%。 此外,光放大器光纤具有以(℃)测量的热膨胀系数,芯与包层之间的差小于2%,吸收截面在0.60×10 24 m 2的范围内 > 0.72×10 24 m 2,在1530nm至1540nm的范围内。
Abstract:
Preforms are obtained (900) and drawn (910). Different preforms of different materials are also obtained (920) and drawn (930). The preforms are then stacked (950) and inserted into a tube (960). The result is then draw (970) into a lightguide that can be an optical fiber or laser or amplifer.
Abstract:
A photonic band gap fiber and method of making thereof is provided. The fiber is made of a non-silica-based glass and has a longitudinal central opening, a microstructured region having a plurality of longitudinal surrounding openings, and a jacket. The air fill fraction of the microstructured region is at least about 40%. The fiber may be made by drawing a preform into a fiber, while applying gas pressure to the microstructured region. The air fill fraction of the microstructured region is changed during the drawing.
Abstract:
To overcome problems of fabricating conventional core-clad optical fibre from non-silica based (compound) glass, it is proposed to fabricate non-silica based (compound) glass optical fibre as holey fibre i.e. one contining Longitudinal holes in the cladding. This removes the conventional problems associated with mismatch of the physical properties of the core and clad compound glasses, since a holey fibre can be made of a single glass composition. With a holey fibre, it is not necessary to have different glasses for the core and cladding, since the necessary refractive index modulation between core and cladding is provided by the microstructure of the clad, i.e. its holes, rather than by a difference in materials properties between the clad and core glasses. Specifically, the conventional thermal mismatch problems between core and clad are circumvented. A variety of fibre types can be fabricated from non-silica based (compounds) glasses, for example: single-mode fibre; photonic band gap fibre; highly non-linear fibre; fibre with photosensitivity written gratings and other refractive index profile structures; and rare-earth doped fibres (e.g. Er, Nd, Pr) to provide gain media for fibre amplifiers and lasers.
Abstract:
PROBLEM TO BE SOLVED: To provide an amplifying optical fiber doped with rare earth elements capable of maximizing gain medium efficiency in a specific gain configuration. SOLUTION: The present invention relates to an amplifying optical fiber having a central core and an optical cladding surrounding the central core wherein the central core is based on a silica matrix including nanoparticles composed of a matrix material including doping ions of at least one of an rare earth element. The matrix of the nanoparticle is selected to assist rare earth solubility and dispersion, and to assist an amplification process. Furthermore, the present invention relates to optical amplifier and an optical laser including the optical fiber according to the present application. Furthermore, the present invention relates to a method of preparing the nanoparticles, a method of manufacturing the optical fiber according to the present application, and the use of the optical fiber. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a wavelength converting member and a manufacturing method thereof which ensure good surface accuracy and dimensional accuracy, even when it is worked into various member shapes. SOLUTION: The manufacturing method of a wavelength converting member includes a process for heating and processing a spare molded body comprising a mixed powder containing a glass powder and an inorganic fluorescent powder so as to obtain a powder sintered substance and a process for repress-molding the powder sintered substance by using a metal mold. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a method by which a glass optical element can be manufactured in a high yield even when appearance defect (haze) occurs on the surface of a glass molded body due to the damage of a mold releasing film at the surface of a mold or the damage of a mold releasing functional film at the surface of a glass preform. SOLUTION: In the method for manufacturing the glass optical element, a molded surface is subjected to precision working on the basis of the desired shape of the optical element, the glass preform is subjected to press forming in the mold on which a mold releasing film is deposited, by a mold pressing method, and the surface of the glass molded body is polished so that the polishing margin becomes ≤500 nm. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
Polyphosphate glass microspheres (PGMs) are prepared using a polyphosphate coacervate. PGMs can be loaded with various therapeutic agents and can be used for various medical and dental procedures and treatments.
Abstract:
A thermoplastic filament comprising multiple polymers of differing flow temperatures in a regular geometric arrangement, and a method for producing such a filament, are described. Because of the difference in flow temperatures, there exists a temperature range at which one polymer is mechanically stable while the other is flowable. This property is extremely useful for creating thermoplastic monofilament feedstock for three-dimensionally printed parts, wherein the mechanically stable polymer enables geometric stability while the flowable polymer can fill gaps and provide strong bonding and homogenization between deposited material lines and layers. These multimaterial filaments can be produced via thermal drawing from a thermoplastic preform, which itself can be three-dimensionally printed. Furthermore, the preform can be printed with precisely controlled and complex geometries, enabling the creation of monofilament and fiber with unique decorative or functional properties.