摘要:
An optical fiber comprising: (i) a core; (ii) a cladding surrounding the core; wherein the cladding comprises a cladding ring that: (a) has a width W equal to or less than 10 microns; (b) includes at least 50 airlines, each airline having a maximum diameter or a maximum width of not more than 2 microns and more than 50% of said airlines have a length of more than 20 m; (c) has an air fill fraction of 0. 1% to 10%, and (d) has an inner radius Rin and an outer radius Rout, wherein 6 μm≦Rin≦14 μm, and 8 μm≦Rout≦14 μm; and (iii) an outer cladding surrounding said cladding ring.
摘要:
An optical fiber comprising: (i) a core; (ii) a cladding surrounding the core; wherein the cladding comprises a cladding ring that: (a) has a width W equal to or less than 10 microns; (b) includes at least 50 airlines, each airline having a maximum diameter or a maximum width of not more than 2 microns and more than 50% of said airlines have a length of more than 20 m; (c) has an air fill fraction of 0.1% to 10%, and (d) has an inner radius Rin and an outer radius Rout, wherein 6 μm≦Rin≦14 μm, and 8 μm≦Rout≦14 μm; and (iii) an outer cladding surrounding said cladding ring.
摘要:
A method of fabricating a microstructure for an optical waveguide such as a photonic bandgap fiber is provided. The method includes the steps of assembling a stack of capillary tubes having substantially identical dimensions, fusing and redrawing the stack into a preform having a plurality of parallel holes of equal diameter, selecting a pattern of the holes for etching in order to increase their diameter, and plugging the unselected holes at one end of the preform against the flow of a pressurized etching fluid. Such plugging of the unselected holes is accomplished applying a layer of a gel-like sealant over the end of the preform, and then pushing the sealant into the holes to form sealant plugs in all of the holes. The sealant plugs are then removed from the selected holes by punching the sealant plugs out of the selected holes. The selected holes are then etched by conducting a pressurized flow of etching fluid to the end of the preform such that etching fluid flows only through the pattern of selected holes. The resulting preform is then fused and drawn into an optical waveguide, where the pattern of etched and unetched holes may form, for example, the microstructure for a photonic bandgap optical fiber.
摘要:
A method of fabricating a photonic crystal or photonic band gap optical fiber comprises providing a preform that includes a plurality of holes in an outer diameter, wherein the holes extend from a first end of a preform to a second end of the preform, and forming at least one radially inwardly-extending slot within the preform such that the slot intersects at least some of the holes, wherein the slot does not intersect at least one hole. The method also includes establishing a first pressure in the holes intersected by the slot by introducing the first pressure to the slot, and establishing a second pressure in the at least one hole not intersected by the slot by introducing the second pressure to an end of the at least one hole not intersected by the slot. The method further includes drawing the preform into a fiber while independently controlling the first and second pressures.
摘要:
Layered glass structures and fabrication methods are described. The methods include depositing soot on a dense glass substrate to form a composite structure and sintering the composite structure to form a layered glass structure. The dense glass substrate may be derived from an optical fiber preform that has been modified to include a planar surface. The composite structure may include one or more soot layers. The layered glass structure may be formed by combining multiple composite structures to form a stack, followed by sintering and fusing the stack. The layered glass structure may further be heated to softening and drawn to control linear dimensions. The layered glass structure or drawn layered glass structure may be configured as a planar waveguide.
摘要:
A glass sheet is formed using a roll-to-roll glass soot deposition and sintering process. The glass sheet formation involves forming a first glass soot layer on a deposition surface of a soot-receiving device, removing the first glass soot layer from the deposition surface, and forming a second glass soot layer on the unsupported first glass soot layer. The resulting composite glass soot sheet is heated to form a sintered glass sheet. The glass sheet can be a substantially homogeneous glass sheet or a composite glass sheet having layer-specific attributes.
摘要:
The invention relates to a burner module having a body that is either sintered or photo-cured, and to methods of making such a burner module. The body (110) of the burner (100) is formed from one of a sintered metal, a sintered alloy, a laminated glass ceramic, and a photo-cured polymer. 1 Sintering and photo-curing may be accomplished by irradiating the body with localized heating using a focused energy source, such as a laser. The burner module is resistant to thermal shock and provides a distributed, even stream of a precursor or precursors to be reacted in a flame of the burner module to form soot, which is to deposited on a receptor surface, and may be used for vapor and liquid precursor delivery systems. A soot deposition system having an array of such burner modules and methods of making a fused silica article by depositing soot using the burner modules are also described.
摘要:
Simultaneous thermal forming of a ferrule and optical fiber as part of a ferrule assembly to thermally form an optical surface in the ferrule assembly. Related fiber optic components, connectors, assemblies, and methods are disclosed. In certain embodiments, the ferrule assembly is comprised of a ferrule and an optical fiber having an end portion extending from an end face of the ferrule. The ferrule may be made from a material or material composition having the same or similar thermal energy absorption characteristics as the optical fiber disposed in the ferrule. Thus, when the end face of the ferrule and an end portion of an optical fiber are simultaneously exposed to a wavelength(s) of a laser beam emitted by a laser, at least a portion of the end face of the ferrule and end portion of the optical fiber are both thermally formed together to form an optical surface.
摘要:
The invention relates to a burner module having a body that is either sintered or photo-cured, and to methods of making such a burner module. The body (110) of the burner (100) is formed from one of a sintered metal, a sintered alloy, a laminated glass ceramic, and a photo-cured polymer. 1 Sintering and photo-curing may be accomplished by irradiating the body with localized heating using a focused energy source, such as a laser. The burner module is resistant to thermal shock and provides a distributed, even stream of a precursor or precursors to be reacted in a flame of the burner module to form soot, which is to deposited on a receptor surface, and may be used for vapor and liquid precursor delivery systems. A soot depostion system having an array of such burner modules and methods of making a fused silica article by depositing sopt using the burner modules are also described.
摘要:
The present invention is directed to a method for making silica. A liquid, preferably halide-free, silicon-containing compound capable of being converted by thermal oxidative decomposition to SiO2 is provided and introduced directly into the flame of a combustion burner, which converts the compound to silica, thereby forming finely divided amorphous soot. The soot is vaporized at the site where the liquid is converted into silica by pneumatically atomizing the liquid with a stream of oxygen gas, or a mixture of oxygen gas and nitrogen gas. The amorphous soot is deposited on a receptor surface where, either substantially simultaneously with or subsequently to its deposition, the soot is consolidated into a body of fused silica glass.