Abstract: A high density, optical fiber array includes etched silicon front and guide masks anodicly bonded to high temperature glass die plate and/or spacer. Optical fibers secured in the front plate holes have the same thermal expansion coefficient as the masks and die/spacer plates to reduce the need for certain epoxy interplate zones which would have a different thermal expansion coefficient. Methods and a system for making the mask/plate stack are also disclosed along with various plate stacking arrangements and the front plate anodicly bonded to a glass lens array.

Abstract: Optical fiber array apparatus comprising housing front mask having a matrix of fiber seating openings each opening having one or more side walls. An optical fiber extends through each opening and means presses the fiber side surface into engagement with the one or more side walls to precisely position and secure the fiber. Bonding material then fills all voids in and around the opeining. In one embodiment, a clamping wafer behind the front mask moves to clamp the fibers to the front mask opening walls. In another, the front mask defines flexing arms with distal ends that clamp fibers to opening walls and in yet another elongated flexible members lie along front mask slots to clamp fibers in openings that communicate into the slots.

Abstract: A method of making and an etchable wafer substrate for use in making optical fiber array plates includes forming a progressively increasing series of metrology holes when the plate holes are formed. The variation between designed plate hole diameter and actual plate hole diameter is determined by sequentially inserting a probe of known designed diameter into the metrology holes to determine the two size-adjacent metrology holes variation. The plate hole diameter can be determined by comparing one of the size-adjacent metrology hole diameter with the respective art work metrology hole diameter. Plate hole diameters can then be corrected for variation with further processing.

Abstract: A high density optical fiber array assembly and assembly method includes a housing securing a front array mask etched with extreme precision to define openings arranged in a predetermined pattern. A series of guide plates form a series of fiber guide channels that align with the mask openings, which plates are stacked within the housing so that the bottom of one acts as a cover for the channels of another. Fibers can be tool inserted along the channels as one group, such as a row of fibers, or manually inserted and advanced sequentially. Alternately, the mask and guide plate stack are mounted to and within a mounting block and the mounting block assembly inserted into the assembly housing substantially all remaining voids in the housing are filled with bonding material.

Abstract: A system of making high density optical fiber arrays that includes securing the optical fiber ends in the housing front mask openings, then lapping the fiber ends and front mask forward surface to angle the fiber end front surfaces so that reflected wave energy does not interfere with optical signal data when transmitted during use. The opening pattern is preferably 2×2 to 128×128 or higher. Several alternate lap tool designs are disclosed including translational and rotating laps formed from solid bodies or a series of stacked plates. Standard slurry grinding and polishing compounds can be applied as desired. If a layer of epoxy originally covers the mask front face, it is removed by the lap tool as the fiber ends are lapped.

Abstract: A high density optical fiber array assembly and assembly method includes a housing securing a front array mask etched with extreme precision to define openings arranged in a predetermined pattern. A series of guide plates form a series of fiber guide channels that align with the mask openings, which plates are stacked within the housing so that the bottom of one acts as a cover for the channels of another. Fibers can be tool inserted along the channels as one group, such as a row of fibers, or manually inserted and advanced sequentially. Alternately, the mask and guide plate stack are mounted to and within a mounting block and the mounting block assembly inserted into the assembly housing substantially all remaining voids in the housing are filled with bonding material.

Abstract: An optical fiber array connector in which the tolerance of the diameter of the mask openings are not factors in the overall positioning of the plurality of fibers. The array includes a mask element with rear and forward surfaces and a plurality of openings that communicate through these surfaces. A plurality of optical fibers include fiber ends having substantially truncated conical side surfaces that extend through the openings and engage the portions of the mask openings nearest the mask rear surface. A method includes preparing the fibers to form a conical surface at their distal ends, preparing the openings in the primary mask each with a diameter less than the diameter of the fiber cladding or second layer, inserting the conical fiber ends until the conical surfaces engage the mask opening walls, applying bonding material to the mask forward surface and exposed tips, grinding and polishing the exposed tips and bonding material surface to truncate the cones and expose the fiber core diameters.

Abstract: Solar resistant fused silica optical fiber is made by heating the starter rod, drawing the fiber, and preferably immediately diffusing hydrogen into the fiber, then promptly covering the hydrogen diffused fiber with hermetic coating to trap the hydrogen within the fiber. The presence of hydrogen in the fiber neutralizes UV radiation induced defects and because the hydrogen can only migrate through the fiber ends, the life of the solar resistant fiber for transmission wavelengths is increased by several years over conventional solar resistant fiber.

Abstract: A fiber optic, cylindrical, light diffuser for medical use includes an unclad distal fiber end where the exposed core end has a conical shape. The core end is enclosed by a sleeve which contacts the clad portion of the fiber only and defines a closed chamber with the distal end of the fiber. The chamber is filled with light diffusing material. The diffuser exhibits highly uniform output light distribution and is capable of carrying relatively high power densities safely.