Abstract:
The invention relates to a method of selective doping of a material by a) radiating a predetermined pre-treated pattern/region into the material, b) treating the material for producing reactive groups in the pre-treated pattern/region, and c) doping the material by the atomic layer deposition method for producing a pattern/region doped with a dopant in the material. The invention further relates to a selectively doped material, a system for preparing a selectively doped material, and use of said method.
Abstract:
An active, double-clad optical fiber comprising: (i) a silica based glass, rare earth doped core having a first index of refraction n 1 ; (ii) a silica based glass inner cladding surrounding the core having a second index of refraction n 2 , such that n 1 >n 2 ; (iii) a silica based glass outer cladding surrounding the inner cladding having a third index of refraction n 3 such that n 2 > n 3 , wherein inner cladding diameter is at least 125µm. The inner cladding diameter is preferably 125 µm to 350 µm; the outer cladding diameter is preferably 145µm to 500 µm. The fiber is for use with high power light power light sources or in optical fiber lasers and optical amplifiers.
Abstract:
High rate deposition methods comprise depositing a powder coating from a product flow. The product flow results from a chemical reaction within the flow. Some of the powder coatings consolidate under appropriate conditions into an optical coating. The substrate can have a first optical coating onto which the powder coating is placed. The resulting optical coating following consolidation can have a large index-of-refraction difference with the underlying first optical coating, high thickness and index-of-refraction uniformity across the substrate and high thickness and index-of-refraction uniformity between coatings formed on different substrates under equivalent conditions. In some embodiments, the deposition can result in a powder coating of at least about 100 nm in no more than about 30 minutes with a substrate having a surface area of at least about 25 square centimeters.
Abstract:
The present invention concerns a preform for an optical fibre, an optical fibre so obtained and methods for making the same. The fibre is characterized in that porous glass doped with at least one dopant is used. Resulting fibres can be used to make high attenuation fibres.
Abstract:
A fiber for optical amplification, characterized in that it exhibits a full width at half maximum in a wavelength spectrum of gain coefficient of 45 nm or more, and a maximum value of power transform efficiency of 80 % or more; and a method for producing a rare earth element doped glass for use in manufacturing the above fiber which comprises a first deposition step of depositing fine vitreous silica particles and a co−dopant (a) to prepare an aggregate of fine vitreous silica particles doped with the co−dopant (a), and a second deposition step of immersing the aggregate of fine vitreous silica particles prepared in the first step in a solution containing a rare earth element and a co−dopant (b) to thereby dope the aggregate of fine vitreous silica particles with components of the rare earth element component and the co−dopant (b).
Abstract:
An optical fiber for transmitting ultraviolet ray, comprising a core (5) formed of a silica glass containing a specified amount of fluorine and a clad (6a) formed of a silica glass containing a specified amount of fluorine or boron, a clad (6b) using an ultraviolet ray transmitting resin, or a clad (6c) having hollow holes (H), a protective layer installed on the outer periphery of the clad, and a protective layer covering layer further installed on the protective layer, wherein hydrogen treatment is applied to the core, clad, and protective layer so that the core, clad, and protective cover are not deteriorated, particularly, by the radiation of ultraviolet ray with high transmittance, whereby first the transmittance of ultraviolet ray of the optical fiber can be increased and the deterioration of the optical fiber by the radiation of ultraviolet ray thereon can be eliminated and second vacuum ultraviolet ray and deep ultraviolet ray can be propagated with a high transmittance, the deterioration by the radiation of ultraviolet ray thereon can be reduced, and a prescribed sharp part can be formed at the tip part of the optical fiber by etching; an optical fiber probe (1), comprising a sharp part (3) formed by sharpening the tip part of the optical fiber (2) with etchant and a metallic film (4) for light shielding formed on the outer peripheral surface of the sharp part (3).
Abstract:
A method for depositing a presintered glass layer (20) rather than fine soot particles on a substrate for use in an integrated optical component. Varying the ratio of the fuel mixture components or fuel rate of the burner (26) (or both) provides control over the microuniformity of the deposited glass layer (20) upon the substrate (22). The presintered glass layer (20) provides a planar optical waveguide with better compositional microuniformity and surface roughness values.
Abstract:
A method for making a glass ceramic, optoelectronic material such as a clad optical fiber or other component for use in an optoelectronic device. The method comprises preparing a glass composition batch to yield a precursor glass for a nanocrystalline glass-ceramic that is doped with at least one kind of optically active ion, such as a transition metal or lanthanide element; melting the batch; forming a glass cane; surrounding the cane with a chemically inert cladding material shaped in the form of a tube; drawing a glass fiber from the combined precursor-glass "cane-in-tube" at a temperature slightly above the liquidus of the precursor glass composition, and heat treating at least a portion of the drawn clad glass fiber under conditions to develop nanocrystals within the core composition and thereby forming a glass ceramic.
Abstract:
A method of creating a codoped layer (18) includes creating a first layer (14) having a first dopant and at least one other layer (16) have another dopant, then interdiffusing the dopant to create a substantially homogeneous codoped layer. More than one dopant may be deposited in a single layer. The creating conditions may be optimized for each layer (14, 16). Further, when the creation of a layer includes sequential deposition and consolidation, conditions for each process may be optimized within the layer creation. While at least two layers (14, 16) are formed, the interdiffusion substantially eliminates any stratification or layer structure.
Abstract:
고속 증착 방법은 생성물 플로우로부터 분말 코팅을 증착하는 단계를 구비한다. 상기 생성물 플로우는 플로우 내의 화학 반응에 기인한다. 분말 코팅 중 일부가 적절한 조건하에서 광학 코팅으로 응집화된다. 기판이 갖는 제1 광학 코닝 상에 분말 코팅이 위치될 수 있다. 응집화 이후에 얻어지는 광학 코팅은 상기 기판에 걸쳐 아래의 제1 광학 코팅과의 커다란 굴절율 차이, 높은 두께 및 굴절율 균일성 및 동일한 조건하에서 상이한 기판들 상에 형성된 코팅들간의 높은 두께와 굴절율 균일성을 가질 수 있다. 일부 실시예에서는 증착에 의해, 약 25 ㎠ 이상의 표면적을 갖는 기판에 있어서 약 30분 이내에 약 100 nm 이상의 분말 코팅을 얻을 수 있다.