Abstract: Methods and systems are provided for determining the density and/or temperature of a fluid based on the manner in which optical energy is affected as the optical energy propagates across a gap between opposing end faces of optical waveguides, or the manner in which the optical energy is reflected from interfaces of optical waveguides and the fluid.

Abstract: An improved assembly for housing actively aligned VCSELs or detectors to a light transport terminal, such as a ferrule, and a method and technique for actively aligning VCSELs and laser detectors to a light transport terminal, such as a ferrule, are provided. The method actively aligns an array of VCSELs or laser detectors to a light transport terminal, such as a first ferrule. The aligned components can then be secured to a retainer housing which can receive a plug. Then a plug, having a second ferrule with V-groove alignment portions and a substantially rectangular housing encasing the second ferrule, can be inserted into the retainer housing, thereby passively aligning the array of optical fibers carried by the second ferrule of the plug to the array of optical fibers of the first ferrule by way of posts extending from the first ferrule into the V-grooves of the second ferrule. A VCSEL or detector to optical fiber plug assembly is thus provided.

Abstract: An improved assembly for housing actively aligned VCSELs or detectors to a light transport terminal, such as a ferrule, and a method and technique for actively aligning VCSELs and laser detectors to a light transport terminal, such as a ferrule, are provided. The method actively aligns an array of VCSELs or laser detectors to a light transport terminal, such as a first ferrule. The aligned components can then be secured to a retainer housing which can receive a plug. Then a plug, having a second ferrule with V-groove alignment portions and a substantially rectangular housing encasing the second ferrule, can be inserted into the retainer housing, thereby passively aligning the array of optical fibers carried by the second ferrule of the plug to the array of optical fibers of the first ferrule by way of posts extending from the first ferrule into the V-grooves of the second ferrule. A VCSEL or detector to optical fiber plug assembly is thus provided.

Abstract: A system for minimizing a protrusion of a fiber-optic cable from a mounting structure comprises a fiber-optic connector, an adapter for a fiber-optic connector, and a standoff The standoff positions the adapter and the connector at a fixed distance from a front surface of the mounting structure. A fiber-optic cable is routed from the connector through a penetration extending between the front and the rear surfaces of the mounting structure. The standoff has a minimum length that ensures that the connector does not protrude from the rear surface of the mounting structure. This arrangement allows a curvature to be imposed on the cable as it exits the rear surface. By imposing a curvature equal to the minimum bending radius of the cable, and extending this curvature through an arc of 90 degrees, a protrusion of the cable in a direction normal to the rear surface can be limited to the minimum bending radius of the cable.