Abstract: In an optoelectronic assembly in which one or more beam paths are to be aligned with a corresponding number of active optical elements, the cooperation between flexible alignment features and fixed alignment features achieves elastic averaging so as to provide the target accuracy. By averaging dimensional and positional errors over a large number of localized couplings of the flexible and fixed alignment features, elastic averaging provides the same accuracy as the more costly and complex kinematic alignment techniques.

Abstract: An input device includes a positioning element and a spring member. The positioning element comprises a generally disc shaped member. The spring member is a generally annular shaped spring member that is generally planar and that defines a generally serpentine pattern. The spring member is positioned laterally outward relative to the positioning element and is configured to exert a biasing force radially inwardly toward the positioning element.

Abstract: A engine such as a gas turbine engine has a bladed rotor 24 having variable pitch blades 8. In normal operation, the pitch angle of the blades 8 is controlled by a primary pitch control system. A back-up system is provided for controlling the blades 8, for example to displace them to a feathered condition, in the event of failure of the primary pitch control system. The back-up system comprises a pump 32 mounted on the rotor 24, and driven by relative rotation between the rotor 24 and a contra-rotating rotor 23. In response to a failure signal on a conduit 48, the pump delivers hydraulic fluid under pressure to a secondary actuator 30, which acts on the blade 8.

Abstract: An optoelectronic package or sub-assembly includes an edge-emitting laser and a reflector that directs a beam from the laser through a sub-mount. The sub-mount contains passive or active circuit elements that are electrically connected to the laser. The laser can be protected from the environment using either a cap in which the reflector is integrated or using an encapsulant encasing the laser. An alignment post that is sized to fit into a sleeve is mounted where the optical signal emerges from the sub-mount. Plugging the post into one end of the sleeve and inserting an optical fiber into the other end of the sleeve so that the optical fiber abuts the post will then align the optical fiber to receive the optical signal.

Abstract: In an optoelectronic assembly in which one or more beam paths are to be aligned with a corresponding number of active optical elements, the cooperation between flexible alignment features and fixed alignment features achieves elastic averaging so as to provide the target accuracy. By averaging dimensional and positional errors over a large number of localized couplings of the flexible and fixed alignment features, elastic averaging provides the same accuracy as the more costly and complex kinematic alignment techniques.

Abstract: A module-to-fiber connection includes a fiber optic module and a fiber optic cable assembly. The fiber optic module includes (1) a ferrule interface having a port for receiving a ferrule, (2) an optoelectronic device such as a light source or a photodetector, and (3) a first lens having a first focus located at the optoelectronic device. The fiber optic cable assembly includes (1) the fiber and (2) the ferrule receiving the fiber. The tip of the ferrule includes a second lens having a second focus located at the tip of the fiber. When the ferrule is inserted into the port, the optical axes of the first and the second lenses are substantially parallel.

Abstract: In an optoelectronic assembly in which one or more beam paths are to be aligned with a corresponding number of active optical elements, the cooperation between flexible alignment features and fixed alignment features achieves elastic averaging so as to provide the target accuracy. By averaging dimensional and positional errors over a large number of localized couplings of the flexible and fixed alignment features, elastic averaging provides the same accuracy as the more costly and complex kinematic alignment techniques.

Abstract: Optoelectronic device packaging assemblies and methods of making the same are described. In one aspect, an optoelectronic device packaging assembly includes an electrical sub-mount that includes a mounting area, a device turning mount, and a light-emitting device. The device turning mount has a sub-mount mounting side that is attached to the mounting area of the electrical sub-mount and a device mounting side that has a device mounting area that is oriented in a plane that is substantially perpendicular to the mounting area of the electrical sub-mount. The light-emitting device includes one or more semiconductor layers that terminate at a common light-emitting surface and are operable to emit light from the light-emitting surface. The light-emitting device is attached to the device mounting area of the device turning mount with the light-emitting surface oriented in a plane that is substantially parallel to the mounting area of the electrical sub-mount.

Abstract: A method for the purification of pharmaceutical grade 1,1,1,2-tetrafluoroethane (HFC-134a) and polymer grade chlorodifluoromethane (HCFC-22) by contacting a mixture containing 1,1,1,2-tetrafluoroethane or chlorodifluoromethane and methyl chloride with a zeolite such as a molecular sieve, and recovering from said contacted mixture substantially purified 1,1,1,2-tetrafluoroethane or chlorodifluoromethane.

Abstract: A package for a surface-emitting laser encloses the die between a sub-mount and a cap. The sub-mount and the cap can be formed using wafer processing techniques that permit a wafer level packaging process which attaches multiple die to a sub-mount wafer, attaches caps either separated or as part of a cap wafer to the sub-mount wafer, and cuts the structure to separate individual packages. The cap includes a transparent plate that can be processed to incorporate an optical element such as a lens. An alignment post attached to the cap indicates the position of an optical signal from the laser and fits snugly into one end of a sleeve while an optical fiber connector fits into the other end.

Abstract: Systems and methods of capacitive sensing in displacement type point devices are described. In one aspect, a pointing device includes a sense electrode structure and a displaceable member. The sense electrode structure includes an arrangement of peripheral sense electrodes in a peripheral region surrounding a central sense electrode. The displaceable member is movable in an operational zone over the sense electrode structure. The displaceable member includes a target electrode facing the sense electrodes and overlapping at least a respective portion of the central sense electrode in each position of the displaceable member in the operational zone.

Abstract: Systems and methods of indicating status of a diagnostic test system are described. In one aspect, a diagnostic test system includes a housing, an indicator system, and a test unit in the housing. The indicator system produces a non-textual sensory output signal that is perceptible from an area outside the housing. The test unit performs at least one diagnostic test on a diagnostic assay to determine whether at least one analyte is present within a sample. The test unit also produces a status indicator control signal triggering the indicator system to indicate a status of the diagnostic test via the non-textual sensory output signal.

Abstract: A fiber optic cable assembly includes a cable and a connector body receiving the cable. The connector body has a ferrule receiving an unpolished fiber from the cable, wherein the fiber protrudes from a tip of the ferrule.

Abstract: An automatic antenna-switching apparatus is provided for the user to connect a single multiband communications platform to a group of antennas with different frequencies by detecting the RF energy input representing the user's selected frequency and automatically switching to the properly polarized and matched antenna for the intended radio band in the group of antennas. The automatic antenna-switching apparatus includes an RF input port, a means for RF sensing, a means for antenna port selection, a group of RF output connectors and a group of different output antennas. The RF sensing means senses the RF energy with a means for frequency counting that determines the exact frequency represented by the RF energy during a particular radio transmission. The RF sensing means sends a frequency count output to the antenna port selection means that compares the frequency count output with the available connected output antennas.

Abstract: A semiconductor package includes a package substrate, an optical device die atop the package substrate, a transparent optical element atop the die, an optional dam around the die, and an encapsulant entirely covering the die and partially covering the transparent optical element.

Abstract: Optoelectronic device packaging assemblies and methods of making the same are described. In one aspect, an optoelectronic device packaging assembly includes an electrical sub-mount that includes a mounting area, a device turning mount, and a light-emitting device. The device turning mount has a sub-mount mounting side that is attached to the mounting area of the electrical sub-mount and a device mounting side that has a device mounting area that is oriented in a plane that is substantially perpendicular to the mounting area of the electrical sub-mount. The light-emitting device includes one or more semiconductor layers that terminate at a common light-emitting surface and are operable to emit light from the light-emitting surface. The light-emitting device is attached to the device mounting area of the device turning mount with the light-emitting surface oriented in a plane that is substantially parallel to the mounting area of the electrical sub-mount.

Abstract: Waveguide based connector systems for optically coupling a fiber optic cable and an optoelectronic device and a method of fabricating the same are described. In one aspect, a connector system comprises an optical waveguide and an optical turn assembly. The optical waveguide has a first end and a second end. The first end of the optical waveguide is connectable to the fiber optic cable in an orientation aligned with a line-side connection axis. The optical turn assembly has a first optical port that is connected to the second end of the optical waveguide in an orientation aligned with a device-side connection axis, a second optical port that is oriented to communicate optically with the optoelectronic device along a device communication axis substantially intersecting the device-side connection axis, and an optical turn system that is operable to guide light along a path between the first optical port and the second optical port.

Abstract: VCSEL array configurations for use with parallel WDM transmitters are disclosed. Transmitters that use several wavelengths of VCSELs are built up out of multiple die to avoid the difficulty of manufacturing monolithic arrays of VCSELs with different optical wavelengths. VCSEL configurations are laid out to insure that VCSELs of different wavelengths that destined for the same waveguide are close together.

Abstract: A package for a surface-emitting laser encloses the die between a sub-mount and a cap. The sub-mount and the cap can be formed using wafer processing techniques that permit a wafer level packaging process which attaches multiple die to a sub-mount wafer, attaches caps either separated or as part of a cap wafer to the sub-mount wafer, and cuts the structure to separate individual packages. The cap includes a transparent plate that can be processed to incorporate an optical element such as a lens. An alignment post attached to the cap indicates the position of an optical signal from the laser and fits snugly into one end of a sleeve while an optical fiber connector fits into the other end.