Abstract: In the case in which an input voltage to a comparator COMP reaches (½)×Vcc from initial Vcc in accordance with lowering of the electric potential at a nodal point N1, an output level of the comparator COMP is inverted to make the output level LOW. In the case in which the output level of the comparator COMP is made LOW, a switch for amplifying part SW3 is connected, and an optical receiver circuit 1 makes the shift to a half start-up state. A signal detector circuit SD as well is started up by the connection of the switch for amplifying part SW3. In the case in which an amplifying part 2 is started up, the signal detector circuit SD judges whether a transmission signal is included in an output from the amplifying part 2. In the case in which the signal detector circuit SD shows that a transmission signal is not included, the resetting switch SW2 is connected to reset a capacitor C1.

Abstract: A load control device is able to receive radio-frequency (RF) signals from a Wi-Fi-enabled device, such as a smart phone, via a wireless local area network. The load control device comprises a controllably conductive device adapted to be coupled in series between an AC power source and an electrical load, a controller for rendering the controllably conductive device conductive and non-conductive, and a Wi-Fi module operable to receive the RF signals from the wireless network. The controller controls the controllably conductive device to adjust the power delivered to the load in response to the wireless signals received from the wireless network. The load control device may further comprise an optical module operable to receive an optical signal, such that the controller may obtain an IP address from the received optical signal and control the power delivered to the load in response to a wireless signal that includes the IP address.

Abstract: Communication from a component in an optical communication system may be effected by modulating a system power voltage across the component to generate voltage signals representing the information to be communicated. The voltage signals generated by the component are detectable in the power feed equipment (PFE) in the optical communication system. Signature analysis may be performed on the system voltage data to identify the voltage signals and determine the information being communicated.

Abstract: The invention is directed to an optical network terminal (ONT) for use in a passive optical network (PON) that provides reliable battery status reporting and, optionally, remote monitoring and configuration of an uninterruptible power supply (UPS) unit. In particular, the UPS unit provides power to the ONT via a power line and transmits data to the ONT via the power line. Generally, the described invention supports one-way or two-way communication of status, alarm, and configuration signals using a single power line. Specifically, such signals may be transmitted over the power line by inserting a carrier frequency, such as a carrier frequency of approximately 1 MHz, onto the power line. In this manner, the invention may provide a simple battery status monitoring system while also reducing the cost of installation.

Abstract: An optical-power-distribution (OPD) subsystem that provides means for supplying optical local-oscillator signals and optical-carrier signals to various optical line cards, without the need for each optical line card to have a corresponding individual laser source. In one embodiment, a single laser coupled to the OPD subsystem provides optical local-oscillator signals and/or optical-carrier signals to multiple optical line cards. In another embodiment, multiple lasers coupled to the OPD subsystem provide multiple optical local-oscillator signals and/or optical-carrier signals to a single line card. An OPD subsystem may provide significant power savings in the operation of the corresponding optical transport system, a reduction in the required equipment-cooling capacity, and/or an increase in the device-packing density within optical line cards and/or inside equipment cabinets that house optical line cards.

Abstract: The invention provides an optically powered device interface module for operating an external device, and an optically powered data link comprising the same. In one embodiment the device interface module includes an optical interface for receiving optical power and data signals, an electrical USB interface for providing USB compliant electrical data signals and a 5V electrical power signal to an external USB device, a transducer coupled to a signal processor for converting the optical power and data signals into the 5V electrical power signal and the USB-compliant electrical data signals, and a power distribution circuit for providing electrical power obtained from the optical power signal to the device interface module circuitry. The transducer may be embodied using a single photovoltaic power converter for receiving the optical power and for receiving and transmitting optical data signals.

Abstract: A removable optical interface module is used to allow an optical transmission apparatus to flexibly respond to a change from a type of service to another that uses a different light wavelength. To this end, the optical transmission apparatus is removably provided with an optical interface module storing attribute information and includes a plurality of service implementation units implementing services using signals transmitted and received through the optical interface module. An operation selecting unit is provided which selects and causes a service implementation unit among the plurality of service implementation units that implement a service corresponding to the attribute information to operate.

Abstract: A process and system are disclosed for supplying electrical energy to a device located in a room housing an imaging system (such as an MRI system, for example), wherein the room is shielded from external electromagnetic fields. Certain embodiments of the present invention provide systems and processes for emitting electromagnetic radiation in the wavelength range of the light spectrum from at least one light emission device. Embodiments of the present invention further provide a process and system for transforming the electromagnetic radiation into electrical energy using at least one transducer device located in the room, and supplying the electrical energy to the device so as to minimize interfering electromagnetic fields within the room.

Abstract: A pluggable optical transceiver with a function not affecting the command status of the host system appeared in the internal bus, which is coupled with the command line within the transceiver, even when the transceiver is plugged in the host system. The optical transceiver provides a power supply circuit and a control unit. The power supply circuit, by receiving an external electric power, generates an internal electric power with a substantial time lag from a moment when the optical transceiver is plugged in the host system. The control unit communicates with the host system through the command line pulled up to the external electric power within the optical transceiver.

Abstract: A light receiving circuit (114) includes a light inputting circuit (113) which converts one-system optical signal to be outputted from an optical transmission path (101) to an electrical signal and inverts a potential of the electrical signal each time the optical signal is detected, and a buffer circuit (110) which amplifies the electrical signal converted by the light inputting circuit and outputs the same. According to such configuration, since one-system optical signal may be inputted to the light receiving circuit, a system circuit configuration can be avoided to be complicated.

Abstract: An aerial platform comprising a kite providing a level of directional stability when elevated by the wind, and an inflated balloon attached above the kite with a cord. The payload is attached to the kite. The physical separation of the balloon from the kite isolates the payload from shocks generated by the balloon. Additional isolation is provided by use of an elastic attachment cord. Electric power is supplied to the aerial platform by means of an optical fiber receiving optical power from a ground-based source, and conversion of the optical power to electrical power on board the platform. In order to provide a strong tether line, the optical fiber is plaited with a jacket braided from high tensile strength fibers. An aerial laser transmitter is described using a ground based laser source transmitting laser power through an optical fiber to an aerial platform for transmission from the platform.

Abstract: In one embodiment, a fiber optic link includes a combined optical link for transmitting high optical power and wide bandwidth signal through a single optical fiber. In one embodiment, a means is provided for combining a high power optical signal and a low power data signal with wavelength selective directional couplers so as to inhibit the low power data transmitter and the low power data receiver from being overloaded with too much power. In one implementation, a method of using double clad fiber is provided, which includes transmitting an optical data signal at an optical data wavelength along an inner core, the inner core being single mode at the optical data wavelength and simultaneously transmitting an optical power signal at a optical power wavelength through a cladding, the cladding serving as a multimode core for a power optical link at the optical power wavelength.

Abstract: The disclosure describes communication of information between a network interface device and subscriber devices over a power line. A UPS unit receives operating power from subscriber premises via a first power line and delivers operating power to the network interface device via a second power line. The network interface device transmits and receives information, such as voice, video and data, to and from the UPS unit via the second power line. The UPS unit receives the information transmitted by the network interface device via the second power line, and transmits the received information to subscriber devices within the premises via the first power line. The UPS unit receives information transmitted by subscriber devices via the first power line, and transmits the received information to the network interface device via the second power line. The first and second power lines each serve as both a power line and a communication medium.

Abstract: Subterranean oilfield sensor systems and methods are provided. The subterranean oilfield sensor systems and methods facilitate downhole monitoring and high data transmission rates with power provided to at least one downhole device by a light source at the surface. In one embodiment, a system includes uphole light source, a downhole sensor, a photonic power converter at the downhole sensor, an optical fiber extending between the uphole light source and the photonic power converter, and downhole sensor electronics powered by the photonic power converter. The photonic power converter is contained in a high temperature resistant package. For example, the high temperature resistant package and photonic power converter may operate at temperatures of greater than approximately 100° C.

Abstract: Exemplary optical communication devices are described which, in certain embodiments, derive power optically from and communicate optically to a reading device. The communication devices may also receive data from modulated light from the reading device to achieve a bi-directional optical communication link between the self-powered optical communication device and the reading device. In some embodiments, the communication device is powered by ambient light, such as sunlight, captures data from a sensor, and communicates the stored data some time later to a reading device. In some embodiments, the communication device is powered locally and communicates through air, optical fiber, or other medium with another communication device.

Abstract: An optical telephone and communication system with interferometers at the transmitter and receiver can use optical time-delay difference and differential frequency shift modulation and multiplexing techniques. The power to the system is provided from either a remote optical source through the optical network or a local optical source. The optical network provides one or two optical connections to the sets. Part of the optical signal from the network is converted to electrical energy stored in a rechargeable battery. The optical sources used have a known coherence function, wavelength and coherence length Lc. The transmitter converts the information to phase variation in one arm of the transmitter interferometer and the receiver recovers this signal by using a matched interferometer. The path imbalance between the two arms of either interferometer is greater than Lc. Each set is assigned a particular time delay difference and/or differential frequency shift for addressing.

Abstract: The invention is directed to an optical network terminal (ONT) for use in a passive optical network (PON) that provides reliable battery status reporting and, optionally, remote monitoring and configuration of an uninterruptible power supply (UPS) unit. In particular, the UPS unit provides power to the ONT via a power line and transmits data to the ONT via the power line. Generally, the described invention supports one-way or two-way communication of status, alarm, and configuration signals using a single power line. Specifically, such signals may be transmitted over the power line by inserting a carrier frequency, such as a carrier frequency of approximately 1 MHz, onto the power line. In this manner, the invention may provide a simple battery status monitoring system while also reducing the cost of installation.

Abstract: A light emitting element driving device of the present invention comprises at least one light emitting element and a power supply device for generating a driving current of the light emitting element. The power supply device has a step-up type DC-DC converter circuit. The step-up type DC-DC converter circuit has a soft-start function for gradually increasing the driving current at a rise of the driving current in generation of the driving current. Thus can be provided a light emitting element driving device which is capable of suppressing an inrush current to be generated at turn-on of the main power supply of the power supply device.

Abstract: A power-down delay unit for delaying cutoff of a voltage is provided in a power supply line which supplies electrical power to an optical module of a transponder unit for each optical wavelength. The power-down delay unit assigns different delays for each wavelength. The length of the delay is a time required by an AMP unit to change from an ALC mode to an AGC mode or longer. When the power sources for supplying electrical power to the transponder units becomes faulty and outputs of several wavelengths are simultaneously going to stop, the power-down delay unit delays cutoff of the supply voltage to the optical modules by keeping supply voltage for a while to the optical modules on behalf of power sources enabling the optical modules to operate after the power sources shutdown, so that the actual optical signals gradually stop one by one.

Abstract: An integrated optoelectronic module and optical fiber for coupling a pair of information system devices having an electrical input/output interface using optical signal communication including an optical fiber; a housing on at least one end of the optical fiber including an electrical connector for coupling with one of said information system devices; an electro-optic subassembly disposed in the housing for coupling to the information system device integrally coupled and attached to the optical fiber for transmitting an optical signal over the fiber; a circuit disposed in the housing for detecting the power of the received optical signal; and a communications interface for communicating the received power level to allow setting of the remove optics transmitter.

Abstract: A method and apparatus for controlling a plurality of infrared devices (ICDs) is provided herein. A remote controller is used to generate an optical signal for controlling a plurality of ICDs. The optical signal generated by the remote controller is converted into an electrical signal by an infrared repeater device. An implementation of such a system includes a rotary mechanical switch to direct the electrical signal generated by the infrared repeater device to a light emitting diode (LED) located near one of the plurality of ICDs. The LED converts the electrical signal into an optical signal and re-transmits the optical signal to the one of the plurality of ICDs. The system allows controlling the plurality of ICDs located in a remote location without having the user commute closer to such ICDs.

Abstract: The present invention allows remote antenna units for radio frequency signal transmission and receipt to operate without the requirement for remote electrical power supplies or for connecting cables that incorporate electrical conductors. According to an aspect of the present invention, an optical communications system employing radio frequency signals comprises a central unit; at least one remote unit having at least one optoelectronic transducer for converting optical data signals to radio frequency signals and converting radio signals to optical signals and at least one antenna to receive and send radio frequency signals; at least one optical fiber data link between the central unit and the remote unit for transmitting optical data signals therebetween; and at least one optical fiber power link between the central unit and the remote unit for providing electrical power at the remote unit.

Abstract: Systems, devices and methods for transmitting and receiving signals on an optical network are disclosed. In one aspect, a micro device for connecting an electronic device to an optical transmission system is disclosed. The micro device can comprise optical components for receiving optical signals and converting the optical signals to electrical signals, a phase shifter for controlling the phase of the electrical signals, and an attenuator for controlling power level of the electrical signals, wherein the micro device is of a size having low electromagnetic interference susceptibility and emissivity.

Abstract: An optical network remote power supply system is proposed, which is designed for use with an optical network for supplying power to a remote switching unit, and which is characterized by the provision of a light source on the local site which can transmit a light beam via the optical transmission line to the remote site, where the light beam is converted into electricity for storage in an electrical energy storage module, such as a rechargeable battery unit or a capacitor. This feature allows the remote switching unit to be powered by the electricity stored in the electrical energy storage module in the event of a failure to the primary channel when the remote switching unit is responsible for switching to the secondary channel.

Abstract: A method and apparatus for transmitting and receiving power over optical fiber is disclosed. In particular, a power over fiber system in which an optical network transmits electrical power via an optical signal and is also transmits data within the optical network as well. The optical signals include a high frequency data portion that includes the data to be transmitted, and either a constant or low frequency power signal portion. The optical signal is received and converted into an electrical signal by a photodetector/photodiode that is electrically filtered to separate the data signal from the power signal. The data signal is then processed using known techniques. The power signal can be conditioned and/or regulated, if necessary, and provided either directly to a terminal piece of equipment to provide all the required power thereto, or may be combined with locally provided power to contribute at least a portion of the power required by the equipment.

Abstract: A mechanism for adjusting or shutting off an optical signal within a network system is provided. The system may include a generating element for providing an optical signal and a bi-directional coupler for transmitting the optical signal to downstream components and fiber links and for transmitting a reflected optical signal based on the reflection characteristics of the downstream components to a converter element. The converter element converts the reflected optical signal to an electrical trigger signal that is used by a processing element to monitor the degradation or operational conditions within the network system. Based on the electrical trigger signal the processing element may adjust or shut off the optical signal at the generating element or at another element within the network system or another network system. The processing element may also send a communication signal to other elements or an operator to indicate unacceptable noise within the network system.

Abstract: A variable beam divergence FSO optical transmitter is described, as well as a method for altering the transmission power being radiated in a telescope for laser on air telecommunications systems. The method calls for the transmission of a very wide angle of the laser beam, in any case sufficient to ensure the quality of the link, when the level of atmospheric attenuation is at a minimum (good visibility conditions) and for a reduction of the beam, in a linear way, in order to increase the density of the power transmitted when visibility becomes poor (increase in atmospheric attenuation due to mist or fog). To increase or decrease the divergence of the beam, the distance between the source of light and the lens is altered in a suitable manner. After evaluating the extent of the variation due to atmospheric attenuation, arrangements are made to alter to a suitable extent the angle of the laser beam that is radiated.

Abstract: A method and apparatus for controlling a plurality of infrared devices (ICDs) is provided herein. A remote controller is used to generate an optical signal for controlling a plurality of ICDs. The optical signal generated by the remote controller is converted into an electrical signal by an infrared repeater device. An implementation of such a system includes a rotary mechanical switch to direct the electrical signal generated by the infrared repeater device to a light emitting diode (LED) located near one of the plurality of ICDs. The LED converts the electrical signal into an optical signal and re-transmits the optical signal to the one of the plurality of ICDs. The system allows controlling the plurality of ICDs located in a remote location without having the user commute closer to such ICDs.

Abstract: A smooth connector circuit for on-line connection of an optical telecommunication module to a main telecommunication unit, where the main unit comprises a common power supply circuit and is connectable to a number of optical telecommunication modules by separately creating with each of them a power connection, a control connection and a communication connection. When inserting an optical module to the main unit, the proposed smooth connector circuit is capable of successively creating the mentioned connections between the optical module and the main unit, so that the power connection is created first and established gradually.

Abstract: The invention relates to a communications backbone interface between at least three members of a communications network for a space vehicle. In the invention, the interface combines various signals received at inlets, which signals may be analog, digital, and optical, coming from two members, and produces a multiplexed optical signal for delivery to a member of the vehicle, such as a piece of equipment. The invention also provides to a communications terminal interface, a communications network having such interfaces, and an optical fiber harness.

Abstract: An optical power distribution system and method permits multiple power consuming devices to be selectively supplied with power using a single fiber optic line. In a described embodiment, multiple electrical power consuming well tools are interconnected to a fiber optic line extending into a well. Control modules are interconnected between the fiber optic line and the well tools. When a particular optical wavelength band is transmitted through the fiber optic line, a corresponding one of the control modules causes the respective well tool to be selected for electrical power to be supplied thereto.

Abstract: For exact level balancing or signal-to-noise ratio balancing of received signals in a wave-length-division multiplex transmission system, the associated transmitted signal power levels are adjusted. If the maximum permissible dynamic range is exceeded, the individual transmitted signal power levels are compressed, while the total transmitted signal power level is kept at least approximately constant.

Abstract: According to one aspect of the present invention, the present invention provides an optical communication system, including: racks mounting many optical communication boards having optical modules thereon, and supplying system power to the mounted optical communication boards; a remote control line supplying a power supplying control signal to the optical communication boards mounted on the optional racks; optical communication boards receiving the system power by being mounted on the racks, and selectively supplying the supplied system power to the optical modules according to the power supplying control signal supplied through the remote control line; and a remote controller preventing the system power from being supplied to the optical modules when the optical communication boards are mounted on the racks while the system power is applied to the racks, and outputting the power to the corresponding optical modules through the remote control line in order to supply the power to the corresponding optical modu

Abstract: The invention concerns a method of establishing and/or maintaining a wake mode in an electrical installation, which in addition to at least one receiving device has at least one transmitting device that is connected through an optical bus system. So as not to always have to operate the different devices in the stand-by mode when no data traffic takes place through the optical bus system, the state of the art proposes activating the receiving device only part of the time. If during that time the receiving device receives a corresponding signal from the transmitting device, the stand-by mode is ended in order to establish the data exchange. However this operating mode is also disadvantageous because of the power consumption.

Abstract: There is disclosed a network architecture comprising a first set of N serially connected power splitting centers connected at one end to receive a power signal and at another end to a termination point, each splitting center having an output associated with a sub-network for delivering a portion of the power signal to that sub-network, wherein the power splitting factor in each power splitting center is variable such that the portion of the power signal delivered to each sub-network is variable. The invention is described with particular relation to a double fiber ring optical network.

Abstract: Optical transmission equipment with more than one power supply which can, when turning on the power supplies, set predetermined function of a signal processing circuit after a predetermined time period after the last turn-on of the power supply and can enable the operation of a drive circuit of the light emitting device after an additional predetermined time period.

Abstract: A first J/B 11 is housed in an instrument panel 21. The first J/B 11 is connected through electric transmission lines 15 to electronic apparatuses A to C, coverts an optical signal from an optical transmission line 13 into an electric signal to output the electric signal to the electronic apparatuses A to C, and converts an electric signal entered from each of the electronic apparatuses A to C into an optical signal to send the optical signal to the optical transmission line 13. A second J/B 12 is housed in a trunk room 22.

Abstract: The invention relates to a communications backbone interface between at least three members of a communications network for a space vehicle. In the invention, the interface combines various signals received at inlets, which signals may be analog, digital, and optical, coming from two members, and produces a multiplexed optical signal for delivery to a member of the vehicle, such as a piece of equipment. The invention also provides to a communications terminal interface, a communications network having such interfaces, and an optical fiber harness.

Abstract: A central power source and method for distributing power to at least one sensor and/or actuators connected to or integrated in an LCC. In an aspect of the invention, a power distribution system is provided comprising a power source, at least one sensor, an LCC structure, and at least one routing means for directing the energy through the LCC structure. In another aspect, the at least one sensor is connected to an LCC bus connected to an electronic system. In still another aspect, an energy storage means for storing the energy received by the at least one sensor is provided. The invention is also directed to a method for distributing power comprising transmitting energy using a power source, directing the energy through an LCC structure, and receiving the energy from the power source using the at least one sensor.