Abstract: A component includes a diffusion coating comprising an inter-diffusion zone between the diffusion coating and a substrate and a non-metallic inclusions zone adjacent to an outer surface of the diffusion coating. A method of coating a component includes applying an aluminizing slurry to a localized area of a component and applying a chromizing slurry to the localized area of the component subsequent to heat treating the aluminizing slurry.

Abstract: A diffuser system for a centrifugal compressor is provided. The diffuser system includes a nozzle base plate that defines a diffuser gap, support blocks, and a drive ring rotatable relative to the support blocks. The drive ring includes cam tracks and bearing assemblies positioned proximate an outer circumference of the drive ring. The diffuser system further includes drive pins extending through the support blocks and the nozzle base plate. The first end of each drive pin includes a cam follower mounted into a cam track on the drive ring. The second end of each drive pin is coupled to a diffuser ring. Rotation of the drive ring causes axial movement of the drive pins by movement of the cam followers in the cam tracks. This results in movement of the diffuser ring to control fluid flow through the diffuser gap.

Abstract: A stand-on blower is provided that allows for fully powered nozzle angle adjustment. The blower may deliver an airflow for pneumatic cleanup tasks in different directions, including horizontal or left-right and vertical or up-down direction variability of the airflow. Position or angle of the blower's nozzle may be automatically reversed or driven to a rotational or angle limit upon demand.

Abstract: A rotary machine includes a rotary shaft that rotates around an axis, a plurality of rotor blades arranged on an outer peripheral side of the rotary shaft in a circumferential direction in which the rotor blade has a blade root, a platform, and a blade main body; and each damper member provided radially inward of the platform, in which the platform includes a first end surface that faces one side in the circumferential direction, and a second end surface that faces the other side in the circumferential direction so that the second end surface faces the first end surface of the adjacent other platform, and the damper member includes a first damper provided on the first end surface and having a first abutting surface, a second damper that has a second abutting surface slidably abutting the first abutting surface of the first damper and is abuttable on the second end surface, and an elastic member that bonds together the first damper and the second damper.

Abstract: Rotor blade for a wind power installation, rotor for a wind power installation, and wind power installation. The disclosure relates in particular to a rotor blade for a wind power installation, having a rotor blade length, having a profile depth established between a leading edge and a trailing edge, and having a profile thickness established between a suction side and a pressure side, wherein the rotor blade has a trailing edge region, which adjoins the trailing edge and extends with a region extent of less than 20%, in particular less than 10%, of the profile depth in the direction of the leading edge, wherein the trailing edge region has at least one acoustic opening.

Abstract: A plurality of wind turbine blades or blade portions have substantially the same size and outer geometrical shape, and corresponding plies of the blades or blade portions having the same position within the respective wind turbine blades or blade portions have different fibre orientation angles relative to a pitch axis of the respective wind turbine blade or blade portion. By changing the fibre orientation angles of the corresponding plies a bend-to-twist coupling of the blade or blade portions may be varied amongst the plurality of blades or blade portions. The blades may then be tailored according to their siting within or on a wind turbine park. A common mould shape may be used across the plurality of wind turbine blades or blade portions, together with a more streamlined blade design process.

Abstract: According to one system, the system includes a chassis defining an enclosure and containing one or more slots. The system further includes a radio frequency identification (RFID) reader module comprising at least one processor and one or more RFID readers located within the enclosure, wherein the one or more RFID readers are configured to read data stored in RFID tags associated with one or more unpowered network taps. The RFID reader module is configured to receive, from a first RFID reader associated with a first slot of the chassis, information regarding a first unpowered network tap in the first slot, to determine, using a known location of the first RFID reader, a slot identifier associated with the first unpowered network tap, wherein the slot identifier indicates that the first unpowered network tap is in the first slot, and to provide the information and the slot identifier to a management system.

Abstract: A method of loading a fiber optic transport system includes adding one or more control channels to an optical fiber having one or more channels, wherein each of the control channels comprises a pair of signals that are cross-polarized and each of the pair of signals is at a different frequency from one another; measuring optical power on the optical fiber; and adjusting optical power of the one or more control channels based on the measured optical power.

Abstract: An optical system is provided that converts optical signals received over an optical trunk from a first optical switch to client optical signals intended for a second optical switch. The first and second optical switches operate in accordance with a Fiber Channel (FC) protocol. An interruption of the optical signals on the optical trunk is detected. Responsive to the interruption, a Not Operational State (NOS) message sent to the second optical switch is delayed so as to delay triggering of an FC link initialization in the second optical switch. While the NOS message is delayed, idle messages are sent to the second optical switch.

Abstract: Device for modulating the intensity of an optical signal on four levels, this device comprising: a first resonant ring modulator comprising an output port capable of delivering a first modulated optical signal, a second resonant ring modulator comprising an output port capable of delivering a second modulated optical signal, an optical assembler comprising: a first input optically coupled to the output port of the second resonant ring modulator, a second input optically coupled to the output port of the first resonant ring modulator, and an output capable of delivering the optical signal of which the intensity is modulated on four different levels constructed by combining the optical signals received on its first and second inputs.

Abstract: A radio frequency over glass (RFoG) system may be modified to extend a downstream band. A transimpedance amplifier with a downstream path may be used in the RFoG system in combination with an upstream path having greater than 200 MHz radio frequency (RF) bandwidth to provide the greater than 1.2 GHz downstream bandwidth overlapping with the greater than 200 MHz upstream bandwidth. The RFoG system may include a gateway facilitating an optical network unit and modem connection, the gateway having an express upstream port and an express downstream radio frequency (RF) port. The gateway may be configured for processing legacy RFoG signals in an upstream and a downstream direction and for at least one of generating or processing, via the express ports on the modem, RFoG signals in an extended spectrum beyond 42 MHz in the upstream direction and beyond 1000 MHz in the downstream direction.

Abstract: An optical transmission method wavelength-multiplexing and transmitting multiple channels including data. The data are composed of data areas independent between the channels and data areas non-independent between the channels. Data patterns of the data areas non-independent between the channels are variable. The data patterns of the data areas non-independent between the channels are set so that in time periods of the non-independent data areas on an optical transmission section, a time period during which polarization states of the multiple channels are correlated in the optical transmission section has a length such that an error rate is less than or equal to a threshold value, the error rate being determined from a temporal distribution of bit errors obtained from a result of error decision after demodulation in an optical receiver.

Abstract: A receiver for an optical communications system which corrects distortion of a received signal. A clock recovery system utilizing a feedback and feedforward system are provided. The feedback loop comprises a phase detector and a clock source, while the feedforward loop comprises the phase detector and a delay element for delaying the output of distortion correction system. The feedback loop has a significantly lower bandwidth than the feedforward path. There are also provided methods of optimizing tap weights and of acquiring initial tap weights.

Abstract: A segmented traveling wave Mach Zehnder optical modulator is described. The segmented traveling wave Mach Zehnder optical modulator may comprise two or more radio frequency (RF) segments, and each RF segment may be configured to support a modulating RF signal. The modulating RF signals may be configured to modulate an optical signal propagating along an optical path of the segmented traveling wave Mach Zehnder optical modulator. The RF modulating signal in the second RF segment may be generated by amplifying the modulating RF signal of the first RF segment, using an RF amplifier. The RF amplifier may be configured to amplify a band-pass spectral portion of the modulating RF signal.

Abstract: An out-of-band (OOB) signal detector is disclosed. The OOB signal detector may include a first node configured to receive an alternating current (AC) portion and a direct current (DC) portion of an electrical signal. The AC portion may include modulated OOB data carried by the electrical signal. The OOB signal detector may also include a current to voltage processing circuit configured to extract the AC portion of the electrical signal. The OOB signal detector may additionally include a limiting amplifier circuit configured to receive the extracted AC portion and to generate an amplified signal based on the extracted AC portion. The OOB signal detector may further include an analog-to-digital convertor circuit configured to sample the amplified signal and to generate a digital sample that represents the modulated OOB data.

Abstract: A method of performing optical serial-to-parallel conversion of an optical signal includes performing phase modulation of the optical pulse stream and outputting a phase-modulated optical signal as a result thereof. The method also includes performing optical switching of the phase-modulated optical signal by optical switches connected to each other in a series relationship on a signal path. The method further includes performing optical switching of a reference optical clock signal by optical switches connected to each other in a series relationship on a reference path.

Abstract: The present disclosure discloses a connectivity identification system for identifying connectivity in a OFC network (100) in a central office. The connectivity identification system comprises a transducer device (101) and an ultrasound communicator (107). When the transducer device (101) is connected to a first node (102), the ultrasound communicator (107) is configured to transmit an ultrasound signal modulated with a unique identifier, through an outer jacket of a Fiber Optic (FO) patch cord, connected between a transmitting port (105) of the first node (102) and a receiving port (106) of a second node (103). When the transducer device (101) is connected to the second node, the ultrasound communicator (107) is configured to receive the ultrasound signal from the transceiver unit (301), demodulate the ultrasound signal to retrieve the unique identifier and identify the receiving port (106) based on the demodulated unique identifier.

Abstract: A method and a device are provided for processing data in an optical network. The method includes the steps of events of a login scan are recorded by a first optical network element; the events are conveyed to a second optical network element; and the events are processed by the second optical network element. A communication system is described that includes the device.

Abstract: A system includes an optical Y-junction coupler to receive a first modulated optical signal on a wide input path of the optical Y-junction coupler and to receive a second modulated optical signal on a narrow input path of the optical Y-junction coupler, wherein the optical Y-junction coupler generates a combined optical signal from signals received on the wide input path and the narrow input path. A multimode waveguide receives the combined optical signal from the optical Y-junction coupler and propagates a spatially multiplexed optical output signal along a transmission path.

Abstract: An optical signal output apparatus includes: a switch having a first state or a second state in accordance with user's operation; and an optical signal output section that outputs a low-level optical signal when the switch is in the first state, whereas outputting a high-level optical signal when the switch is in the second state.