Abstract: The invention relates to a hermetic feedthrough of an optical fiber into a package for an optical module, that includes a package ferrule hermetically attached to the package or integral therewith, a fiber ferrule hermetically sealed around the optical fiber, and a compression sleeve hermetically sealed around the package ferrule. The compression sleeve is hermetically sealed to the fiber ferrule or integral therewith, and wherein a coefficient of thermal expansion (CTE) of the compression sleeve is greater than a CTE of the package ferrule so that a joint between the compression sleeve and the package ferrule is under compressive stress.

Abstract: A computer system may include a chassis defining a front and a rear. The chassis may include a vertically oriented midplane disposed therein, the midplane including a plurality of front module slots for receiving front electronic modules from the front of the chassis, and a plurality of rear module slots for receiving rear electronic modules from the rear of the chassis. A cooling system may be provided within the chassis and may generate an upwardly-directed front air flow within the chassis directed at selected ones of the front electronic modules and an upwardly-directed rear air flow within the chassis directed at selected ones of the rear electronic modules. The front air flow is separate from and independent of the rear air flow. The selected front and rear electronic modules may be disposed in the chassis so as to separate the front air flow into a plurality of substantially equal front air streams and the rear air flow into a plurality of substantially equal rear air streams, respectively.

Abstract: The invention relates to a method and apparatus for acquiring a complex spreading code of a direct sequence spread spectrum signal (DSSS) by acquiring a state of a spreading code generator capable of generating the complex spreading code. A sequence of bipolar differential product values, which sign is independent on data transmitted by the DSSS signal, is obtained by combining in-phase and quadrature samples of the DSSS signal for adjacent chip intervals. This sequence is provided to a linear block decoder for obtaining a codeword of a linear block code, which is defined by a structure of the spreading generator and the differential product operation. The codeword is used to compute the state of the spreading code generator.

Abstract: A M×N wavelength selective switch (WSS) module capable of independently routing any wavelength channel from any input port to any output port is provided. The M×N WSS includes a first beam relayer including first and second elements having optical power, each of which is disposed such that light transmitted to or from a first plurality of ports passes through a common point. The M×N WSS also includes a wavelength dispersive element, a first switching array having M rows including K switching elements, a second beam relayer, and a second switching array including N switching elements. The second switching array includes an optical by-pass disposed at the common point, which provides means for separating the input and output beams of light, and which allows both the input and output optical beams to traverse similar paths throughout the optical train.

Abstract: A system, method and computer-readable code for segmenting an audio stream into a plurality of small digital audio files using gaps in the natural language of the audio stream is provided. The small digital audio files are transmitted, loaded, and played in a specific order, such that from the user's perspective, the audio stream is reproduced in an apparently seamless manner. This is done without reassembling the audio stream, either in whole or in part. The small digital audio files are created using natural language gaps, and are generally small enough to ensure that a first small digital audio file can be downloaded and played without significant delay, while successive small digital audio files are downloaded to be played in the future. Accordingly, the user receives audio-on-demand in a timely manner.

Abstract: Embodiments of the present invention include enhanced functionalities and components within a Communication Endpoint Processor (CEP) that act as an interface between computational and communications domains. The embodiments disclosed herein deliver a complete memory mapped high performance interface that has the ability to support the simultaneous transmission of multiple frames of multiple sizes, and that has the ability to interrupt the transmission of lower priority frames in order to send higher priority frames.

Abstract: A multi-layer hidden hinge and actuator design for high fill factor biaxial MEMS mirror array for wavelength selective switches (WSS) based on a silicon-on-insulator (SOI) process with wafer bonding and coarsely aligned orthogonal vertical comb and/or parallel plate actuator. The present invention relates to a micro-mirror in a MEMS linear piano micro-mirror array comprising a micro-mirror layer, a hinge layer and an electrode/substrate layer. The structure is formed by fabricating the layers separately in SOI structure and then bonding them together.

Abstract: The invention relates to receivers and methods for receiving multi-carrier differentially modulated signals utilizing iterative decision-directed differential detection. The receiver includes a decision feedback loop including a channel estimator for estimating inter-symbol channel variations, and a differential equalizer for correcting channel-induced errors in a differentially detected signal based on the estimated inter-symbol channel variations.

Abstract: A configuration apparatus includes a user interface allowing a user to initiate configuration of at least a target configurable device selected from a plurality of configurable devices. A command module is coupled to the user interface for dynamically generating a sequence of commands required to configure the target configurable device. The sequence of commands includes commands for entering a hidden service-configuration menu of the target configurable device. A communication module is coupled to the command module for transmitting the sequence of commands to the target configurable device.

Abstract: Improved high quality gate dielectrics and methods of preparing such dielectrics are provided. Preferred dielectrics comprise a rare earth doped dielectric such as silicon dioxide or silicon oxynitride. In particular, cerium doped silicon dioxide shows an unexpectedly high charge-to-breakdown QBD, believed to be due to conversion of excess hot electron energy as photons, which reduces deleterious hot electron effects such as creation of traps or other damage. Rare earth doped dielectrics therefore have particular application as gate dielectrics or gate insulators for semiconductor devices such as floating gate MOSFETs, as used in as flash memories, which rely on electron injection and charge transfer and storage.

Abstract: A wavelength selective switch (WSS) based on an array of MEMS mirrors tiltable in 1-dimension about only one axis exhibits “hitting” or unwanted port connections during switching. Two WSS's can be cascaded to create M×N switching functionality in a hitless manner by the inclusion of block ports at specified positions in one or both of the WSS's. Greater use efficiency of ports can be achieved if quasi-hitless performance is acceptable.

Abstract: The invention relates to a method and a graphical user interface for modifying a depth map for a digital monoscopic color image. The method includes interactively selecting a region of the depth map based on color of a target region in the color image, and modifying depth values in the thereby selected region of the depth map using a depth modification rule. The color-based pixel selection rules for the depth map and the depth modification rule selected based on one color image from a video sequence may be saved and applied to automatically modify depths maps of other color images from the same sequence.

Abstract: The invention relates to an apparatus for dynamically controlling the gain of an optically pumped optical amplifier, and the optical amplifier including such apparatus, which utilizes a multiplying digital to analog converter to implement a digitally adjustable analog feed forward control of a source of pump radiation of the optical amplifier.

Abstract: An electrostatic comb actuator having reduced in-plane rotation of a tiltable element is disclosed. The actuator has a stator comb electrode and a tiltable rotor comb electrode. The rotor comb electrode fingers extend from an anchor wall running parallel to the axis of rotation of the rotor at a first distance from the axis of rotation. The rotor comb electrode fingers extend towards the axis of rotation for a length that is smaller than the first distance. The stator electrodes are shifted towards the axis of rotation, so that the stator electrode fingers are only partially overlapping with the rotor electrodes fingers.

Abstract: A waveguide bandpass filter for use in microwave and millimeter-wave satellite communications equipment is presented. The filter is based on a substrate integrated waveguide (SIW) having several cascaded oversized SIW cavities. The filter is implemented in a printed circuit board (PCB) or a ceramic substrate using arrays of standard metalized via holes to define the perimeters of the SIW cavities. Transmission lines of a microstrip line, a stripline or coplanar waveguide are used as input and output feeds. The transmission lines have coupling slots for improved stopband performance. The filter can be easily integrated with planar circuits for microwave and millimeter wave applications.

Abstract: A hermetically packaged, MEMS array-based ROADM module is disclosed. The enclosure sidewalls and a top lid are made of Kovar, and the base is made of alumina ceramic AuSn-soldered to the enclosure sidewalls. The MEMS array is attached to the ceramic base. The optics are passively pre-aligned using a removable template and epoxied to an optical bench. The optical bench is actively aligned as a whole and attached to the ceramic base. A plurality of electrical feedthrough contact pins extend from the bottom of the ceramic base for connecting the MEMS to a connector on a printed circuit board. In one embodiment of the invention, the ceramic base extends beyond the footprint of the sidewalls of the enclosure of the module, for mounting additional electronic components, for example MEMS driver circuitry chips, directly to the ceramic base of the enclosure.

Abstract: The present invention provides a particle standard including particles having optical properties similar to those of a carrier in which the particles are dispersed, as well as a method of calibrating or validating a subject optical particle analyzer with respect to a reference optical particle analyzer by using the particle standard. In the method, the particle standard is analyzed with the reference optical particle analyzer to obtain a reference particle concentration and a reference particle-size distribution. Analogously, the particle standard is analyzed with the subject optical particle analyzer to obtain a subject particle concentration and a subject particle-size distribution. The subject particle concentration and the subject particle-size distribution are then compared to the reference particle concentration and the reference particle-size distribution, respectively, and the subject optical particle analyzer is adjusted accordingly.

Abstract: An engineered structure of a light emitting device comprises multiple layers of alternating active and buffer materials disposed between AC or DC electrodes, which generate an electric field. The active layers comprise luminescent centers, e.g. group IV semiconductor nanocrystals, in a host matrix, e.g. a wide bandgap semiconductor or dielectric material such as silicon dioxide or silicon nitride. The buffer layers are comprised of a wide bandgap semiconductor or dielectric material, and designed with a thickness, in the direction of an applied electric field, that ensures that electrons passing therethrough picks up enough energy to excite the luminescent centers in the adjacent active layer at an excitation energy to emit light efficiently at a desired wavelength.

Abstract: Electroluminescent (EL) light emitting structures comprises one or more active layers comprising rare earth luminescent centers in a host matrix for emitting light of a particular color or wavelength and electrodes for application of an electric field and current injection for excitation of light emission. The host matrix is preferably a dielectric containing the rare earth luminescent centers, e.g. rare earth doped silicon dioxide, silicon nitride, silicon oxynitrides, alumina, dielectrics of the general formula SiaAlbOcNd, or rare earth oxides. For efficient impact excitation, corresponding drift layers adjacent each active layer have a thickness related to a respective excitation energy of an adjacent active layer. A stack of active layers emitting different colors may be combined to provide white light. For rare earth species having a host dependent emission spectrum, spectral emission of the stack may be tuned by appropriate selection of a different host matrix in successive active layers.

Abstract: The present invention relates to a wavelength switch including two switching stages. A single actuation array of reflecting elements of a first switching stage routes sub-beams at different wavelength bands to a plurality of actuation arrays of reflecting elements of a second switching stage. Each second-stage actuation array routes sub-beams to a group of output ports associated with that second-stage actuation array. Advantageously, the sub-beams are redirected from the first switching stage to the second switching stage by a reflecting relay assembly, without being combined or coupled into fibers.