A device and methods, the device comprising: a photo detector comprising a waveguide; two metal layers connected to the photo detector; a measurement device connected between the two metal layers, for measuring an electric parameter between the two metal layers, said electric parameter indicative of an amount of light propagating through the waveguide; and a voltage source connected between the two metal layers, wherein applying voltage between the two metal layers changes a refraction index of the waveguide, thereby affecting a phase of light propagating through the waveguide, and wherein the voltage to be applied is determined in accordance with the resistance measured by the resistance measurement device.

A sensor assembly comprises a remote data concentrator (RDC) and an optically powered transducer module (OPTM). The RDC transmits a first optical pulse including a parameter request signal along an optical fiber. The OPTM is connected to the optical fiber, and comprises a photodiode, an energy storage device, a sensor, a processor, and a laser. The photodiode receives the first optical pulse, and the energy storage device is charged by the photodiode. The sensor, processor, and laser are powered by discharging the energy storage device. The sensor senses a parameter specified by the parameter request signal. The processor generates a signal packet from the output of the first sensor. The laser transmits a second optical pulse including the signal packet along the optical fiber to the RDC

The invention relates to an optical light guiding system, comprising an interface for coupling in and/or an interface for decoupling data and at least one data channel for transmitting data, and a method for transmitting data in optical systems, comprising the steps of coupling data into an interface of a beam guidance element; the transmission of the data by means of a first and/or a second data channel, which are arranged within the beam guiding element (or the casing), wherein the data channels can also be used for the fractional monitoring of the beam guiding element; and decoupling the data from an interface.

The invention relates to an optical light guiding system, comprising an interface for coupling in and/or an interface for decoupling data and at least one data channel for transmitting data, and a method for transmitting data in optical systems, comprising the steps of coupling data into an interface of a beam guidance element; the transmission of the data by means of a first and/or a second data channel, which are arranged within the beam guiding element (or the casing), wherein the data channels can also be used for the fractional monitoring of the beam guiding element; and decoupling the data from an interface.

A sensing system utilizes multiple wavelengths communicated on a single pulse to a sensor, for example, an optical fiber. Backscattered or reflected light from a number of locations or depths along the sensor are analyzed to correct for 2π phase jump error. A phase sensing method detects the 2% phase jump error associated with one or more measurements from the sensor. Correcting for the 2π phase jump error provides increased accuracy of the one or more measurements, for example, improved vertical sensing profiling, production and fracture monitoring, and micro-seismic monitoring.

A sensing system utilizes multiple wavelengths communicated on a single pulse to a sensor, for example, an optical fiber. Backscattered or reflected light from a number of locations or depths along the sensor are analyzed to correct for 2π phase jump error. A phase sensing method detects the 2% phase jump error associated with one or more measurements from the sensor. Correcting for the 2π phase jump error provides increased accuracy of the one or more measurements, for example, improved vertical sensing profiling, production and fracture monitoring, and micro-seismic monitoring.

A multiplexed sensor system includes a control unit in communication with a plurality of sensors. A plurality of optic fibers defines a communication path between the plurality of sensors and the control unit. A multiplexing portion communicates with a plurality of sensors along a common one of the plurality of optic fibers and a protected channel through which at least a portion of the optic fibers are routed. The protected channel at least partially surrounds the optic fibers and shields the optic fibers from an environment outside the protected channel. A cooling flow is provided through the protective channel for minimizing temperature fluctuations within the protective channel. A method is also disclosed.

A multiplexed sensor system includes a control unit in communication with a plurality of sensors. A plurality of optic fibers defines a communication path between the plurality of sensors and the control unit. A multiplexing portion communicates with a plurality of sensors along a common one of the plurality of optic fibers and a protected channel through which at least a portion of the optic fibers are routed. The protected channel at least partially surrounds the optic fibers and shields the optic fibers from an environment outside the protected channel. A cooling flow is provided through the protective channel for minimizing temperature fluctuations within the protective channel. A method is also disclosed.

At least two cascaded chains of intelligent support boxes linked by optical cable provide the needed elements to link the electric AC power line and low voltage DC power lines to the many known outlets and switches (wiring devices) and their loads be it AC or DC operated, with the AC and DC lines are separately drawn through separated conduits and ducts safely and accurately controlled by an home controller and/or via a command converter and a distributor.

At least two cascaded chains of intelligent support boxes linked by optical cable provide the needed elements to link the electric AC power line and low voltage DC power lines to the many known outlets and switches (wiring devices) and their loads be it AC or DC operated, with the AC and DC lines are separately drawn through separated conduits and ducts safely and accurately controlled by an home controller and/or via a command converter and a distributor.