Abstract: An optical receiving apparatus, including an optical interferometer including first and second optical waveguides having light paths different in length and converting a phase modulated signal received by the optical receiving apparatus into an intensity modulated signal, monitors the results of the detecting by the temperature detector and the measuring by the electric current measure while sweeping the temperature of the first optical waveguide in a predetermined range; selects the temperature of the first optical waveguide at which temperature the average photocurrent has an extreme value based on the result of the monitoring; and varies the temperature of the first optical waveguide to the selected temperature.

Abstract: A method and system for single laser bidirectional links are disclosed and may include communicating a high speed optical signal from a transmit CMOS photonics chip to a receive CMOS photonics chip and communicating a low-speed optical signal from the receive CMOS photonics chip to the transmit CMOS photonics chip via one or more optical fibers. The optical signals may be coupled to and from the CMOS photonics chips utilizing single-polarization grating couplers. The optical signals may be coupled to and from the CMOS photonics chips utilizing polarization-splitting grating couplers. The optical signals may be amplitude or phase modulated. The optical fibers may comprise single-mode or polarization-maintaining fibers. A polarization of the high-speed optical signal may be configured before communicating it over the single-mode fibers. The low-speed optical signal may be generated by modulating the received high-speed optical signal or from a portion of the received high-speed optical signal.

Abstract: An optical transmission assembly consists of an upper cladding; a lower cladding; a core formed between the upper cladding and the lower cladding; a surface light emitting device mounted to an upper surface at one end of the upper cladding, a light emitting surface of the surface light emitting device facing the core and emitting wavelength ?1 light thereto; a reflective surface formed in the core and at a position facing the light emitting surface of the surface light emitting device, and inclined in a longitudinal direction of the core; an inclined surface formed in the core and facing the reflective surface in a longitudinal direction of the core, and inclined in a thickness direction of the upper or lower cladding; a wavelength filter formed on the inclined surface and transmitting wavelength ?1 light incident in a longitudinal direction of the core while reflecting wavelength ?2 (?2??1) light incident in the opposite longitudinal direction of the core to the incident direction of the wavelength ?1 light,

Abstract: The method for filtering an optical signal comprising a plurality of channels lying on a grid of optical frequencies equally spaced by a frequency spacing and occupying an optical bandwidth, comprises: a) operating an optical filter comprising a plurality of resonators, wherein a first resonator of the plurality is optically coupled to the optical signal and the remaining resonators are optically coupled in series to the first resonator, so that a respective resonance of each one of the plurality of resonators falls within a first frequency band having bandwidth less than or equal to 15 GHz; b) operating the optical filter so as to obtain a separation between said respective resonance of at least one resonator with respect to said respective resonance of at least another different resonator, the separation being greater than or equal to 25 GHz; c) operating the optical filter so that said respective resonance of each one of the plurality of resonators falls within a second frequency band, different from the f

Abstract: A technique for securing data transmission via an optical communication line comprising an optical fiber extending between a first network element and a second network element; the technique comprises conveying a first optical signal carrying data via the optical fiber from the first network element towards the second network element at a predetermined optical wavelength, and conveying a second optical signal at the same predetermined optical wavelength via the same fiber in the opposite direction to create within the optical fiber a combined optical signal such that combination of the first and second optical signals is adapted to hamper an unauthorized non-intrusive extraction of the first optical signal from the combined optical signal.

Abstract: Multiplex-demultiplex (mux/demux) “groups” multiplex and demultiplex a predetermined maximum number of optical wavelengths. A method for assigning wavelengths of fiber links and mux/demux groups to given traffic (or traffic segments) in an optical communications network, minimizes over all terminals a total number of mux/demux groups required. The method (FIG. 5) involves (510) sorting the terminals in order of size of load. Further, for each traffic segment between pairs of first and second terminals, the method involves (516) assigning a smallest wavelength that is available between the first and second terminals and that is available on the segment path between the terminals; and in the terminals, (518) deploying mux/demux groups supporting the assigned wavelengths. A modified method (FIGS. 6A, 6B), as well as a method for dynamically assigning and deploying newly arriving traffic segments (FIG. 7), are also provided.

Abstract: A remote sensing system comprises a micro-electromechanical sensor (MEMS) device comprising an optical energy absorbing sensing element that resonates by thermal expansion induced by absorption of optical signals, a remotely located optical source for transmitting driving optical signals to induce resonation in the sensing element, and a remotely located reader circuitry to read an original frequency of the sensing element using reader optical signals for determining a condition to which the MEMS device is exposed.

Abstract: A communication includes an analog input configured to receive an analog signal. An analog to digital converter configured to provides a digital signal output based upon the analog input. A modulator is configured to modulate a laser based upon the digital signal thereby generating a modulated optical signal. An optical fiber carries the modulated optical signal and an optical detector arranged to receive the modulated optical signal from the optical fiber and provide a received output. A digital to analog converter digitizes the received output and provides an analog output based respective of the analog signal provided to the analog input.

Abstract: An optical code division multiple access communication system using a processor processes at least one collimated input beam which has been modulated with a data signal to produce multiple time-delayed output beams. The multiple time-delayed output beams are spatially distributed and independently phase shifted. An integration lens receives the phase modulated output beams and reintegrates the phase modulated output beams into a single encoded beam with a time series chip sequence. The integrated encoded beam is transmitted. A receiving system includes a processor to process the encoded collimated light beams received from a transmitter to produce multiple time-delayed output beams. The multiple time-delayed output beams are spatially distributed and independently phase shifted. An integration lens receives the phase-shifted output beams and reintegrates the phase-shifted output beams into a single decoded beam.

Abstract: Optical fiber interconnection devices, which can take the form of a module, are disclosed that include an array of optical fibers and multi-fiber optical-fiber connectors, for example, a twenty-four-port connector or multiples thereof, and three eight-port connectors or multiples thereof. The array of optical fibers is color-coded and is configured to optically interconnect the ports of the twenty-four-port connector to the three eight-port connectors in a manner that preserves transmit and receive polarization. In one embodiment, the interconnection devices provide optical interconnections between twenty-four-fiber optical connector configurations to eight-fiber optical connector configurations, such as from twenty-four-fiber line cards to eight-fiber line cards, without having to make structural changes to cabling infrastructure. In one aspect, the optical fiber interconnection devices provide a migration path from duplex optics to parallel optics.

Abstract: The present invention relates to an installation for conveying electrical signals carried by a first triaxial cable (1) to a second triaxial cable (18). It comprises: a first interface (15) between the first triaxial cable (1) and a fibre optic cable (9) and a second interface (16) between the fibre optic (9) cable and the second triaxial cable (18). A television camera (17) is connected to a remote camera control unit (14) via this installation. The first triaxial cable (1) connects CCU (14) with the interface (15). The interface (15) comprises an adapter converting electrical signals, conveyed by the triaxial cable (1), to optical signals. The fibre optic cable (9) transmits optical signals to the second interface (16). The interface (16) comprises an adapter converting optical signals to electrical signals. The second triaxial cable (18) transmits the electrical signals to the television camera (17). A mirror image of the adapters allows transmitting electrical signals from the camera (17) to the CCU (14).

Abstract: An efficient means for transmitting digitized return path signals over a cable television return path is disclosed. In one embodiment of the invention, the cable television return path includes a node that receives an analog return signal from a subtree of the cable television system and generates a digital transport signal representative of the analog return path signal. The digital transport signal, however, is not a digitized form of the analog return signal. Rather, the digital transport signal is encoded such that fewer bits are used to represent the analog return signal without substantially impacting the accuracy and dynamic range of the signal. At the hub, the digital transport signal is decoded and converted to produce an analog signal that is a close approximation of the analog return signal.

Abstract: An optical signal transfer device includes a transmitter system and a receiver system for signal transfer between a base unit and a rotary unit. The receiver system includes a natural number n of light receiving portions forming a ring-like light receiving area around the rotary axis and a light reception controller. The transmitter system includes a light emitting portion, an emission controller, and an optical guide which guides a light beam from the light emitting portion to a light emitting area facing the light receiving area. The optical guide guides a light beam to the light emitting area in one of n equally divided areas of a ring-like opposing area which opposes the light receiving area. Therefore, one of the n light receiving portions always face the light emitting area irrespective of rotary position of the receiver system around the rotary axis relative to the transmitter system.

Abstract: An optical/electrical composite cable in which a first connector having an optical transmission unit is connected to a second connector having an optical reception unit via an electrical wire and an optical wiring line includes a state detection unit that detects a connection state of the first connector, a connection state of the second connector, a power supply state of a transmission-side electronic device connected to the first connector and a power supply state of a reception-side electronic device connected to the second connector, and an electrical power supply control unit that controls supply of electrical power to the optical transmission unit and optical reception unit according to the detected states.

Abstract: A USB compatible apparatus for connecting an optical universal serial bus (USB) (or an optical serial bus; OSB) device and an electrical USB device, and a structure of the apparatus are provided. More particularly, a USB compatible apparatus for guaranteeing a connection between an optical USB device for inputting/outputting an optical signal and an electrical USB device for inputting/outputting an electrical signal, for example, signal transmission and reception between an electrical USB device (e.g., an electrical USB memory) and an optical USB device (e.g., a computer) having an optical USB port, and a structure of the USB compatible apparatus (a first exemplary embodiment), and a USB compatible apparatus for guaranteeing signal transmission and reception between an optical USB device (e.g., an optical USB memory) and an electrical USB device (e.g., a portable telephone) having an electrical USB port, and a structure of the USB compatible apparatus (a second exemplary embodiment) are provided.

Abstract: A system for optoelectrical communication includes a transmitter configured to transmit optical signals. It also includes a pluggable form factor module. The module includes an input port, an output port, and a receiver configured to convert optical signals received at the input port into electrical signals. The system further includes an optoelectrical connector coupled to the module and the transmitter. The connector includes an embedded fiber coupled to the transmitter and configured to transmit the optical signals from the transmitter to the output port of the module. The connector also includes electrical contacts configured to receive the electrical signals from the receiver. The system includes a cage in a pluggable form factor configured to house the module and the connector, wherein the transmitter is positioned outside the cage.

Abstract: An optical module with a ferrule assembly able to be easily produced is disclosed. The ferrule with a tubular shape provides first to third bores. The first bore receives the optical fiber with a sheath, the second bore receives only the glass core of the fiber, which is obtained by removing the sheath, and the third bore has a diameter substantially equal to the outer diameter of the glass core of the fiber. A resin is filled in the gap between the sheath and the third bore, and in the gap between the glass core of the fiber and the second bore. The tip of the glass core is tilted with the axis and protrudes from the end surface of the ferrule.

Abstract: Digital optical networks for communication between digital consumer electronic devices are disclosed. A digital optical network can include an input interface configured to electrically couple to a DVI or HDMI receptacle of a source device. The input interface includes an optical transmitter for converting a TMDS signal into an optical signal. An input optical fiber optically coupled to the optical transmitter receives the optical signal. A coupler is coupled to the input optical fiber and couples the optical signal with at least one of multiple output optical fibers coupled to the coupler. Output interfaces each include an optical transmitter for converting the optical signal back into the electrical TMDS signal. The output interfaces are configured to electrically couple the TMDS signals with respective DVI or HDMI receptacles of DVI or HDMI sink devices.

Abstract: Plasmonic systems and devices that utilize surface plasmon polaritons (or “plasmons”) for inter-chip and/or intra-chip communications are provided. A plasmonic system includes a microchip that has an integrated circuit module and a plasmonic device configured to interface with the integrated circuit module. The plasmonic device includes a first electrode, a second electrode positioned at a non-contact distance from the first electrode, and a tunneling-junction configured to create a plasmon when a potential difference is created between the first electrode and the second electrode.

Abstract: A light transmission system has a light transmission module having a light transmission path that transmits a data signal as an optical signal, wherein the light transmission module converts the optical signal transmitted through the light transmission path to an electrical signal and outputs the converted optical signal as a binarization signal, an electrical transmission path that outputs a clock signal as a binarization signal, a reception processing unit that performs a reception process on each of the data signal and the clock signal, and a first delay unit that delays a rise start time of the clock signal with respect to a rise start time of the data signal for the binarization signal. A delay amount of the clock signal by the first delay unit is a time less than or equal to a maximum value of a data dependency jitter (DDJ).

Abstract: An efficient means for transmitting digitized return path signals over a cable television return path is disclosed. In one embodiment of the invention, the cable television return path includes a node that receives an analog return signal from a subtree of the cable television system and generates a digital transport signal representative of the analog return path signal. The digital transport signal, however, is not a digitized form of the analog return signal. Rather, the digital transport signal is encoded such that fewer bits are used to represent the analog return signal without substantially impacting the accuracy and dynamic range of the signal. At the hub, the digital transport signal is decoded and converted to produce an analog signal that is a close approximation of the analog return signal.

Abstract: An optical module includes a fiber array, a laser diode array, a photodiode array and a micro-lens array. The fiber array includes optical fibers which are divided to a transmitter group and a receiver group. The laser diode array includes laser diodes which are grouped in a transmitter group. The photodiode array includes photodiodes which are divided to a monitor group and a receiver group. The laser diode array is provided between the fiber array and the photodiode array. The optical fibers of the transmitter group are optically aligned with the laser diodes of the transmitter group, respectively. The micro-lens array is provided between the laser diode array and the photodiode array, and optically aligns the laser diodes of the transmitter group and the optical fibers of the receiver group with the photodiodes of the monitor group and the photodiodes of the receiver group, respectively.

Abstract: A light transmission module has a light transmitting unit having a light emitting portion for outputting an optical signal corresponding to a data signal input as an electrical signal, and a first power supply controller for controlling a drive power supply of the light emitting portion, a light transmission path for transmitting the optical signal introduced from the light transmitting unit, a light receiving unit having a light receiving portion for receiving the optical signal output from the light transmission path and outputting an electrical signal corresponding to the optical signal, and a second power supply controller for controlling a drive power supply of the light receiving portion, and at least one electrical transmission path, connecting the light transmitting unit and the light receiving unit, for transmitting a control signal for controlling power supply to the light emitting portion and the light receiving portion to the first power supply controller and the second power supply controller.

Abstract: Digital electronic devices for optical communication of digital video and/or audio signals between a digital source device and a digital sink device. A digital source device includes a transition minimized differential signaling (TMDS) transmitter for receiving control and digital video signals from a source controller and for converting the control and digital video signals into electric TMDS signals. An interface receives a first end of an optical fiber. An optical transmitter converts the electric TMDS signals to at least one optical signal and transmits the at least one optical signal to the first end of the optical fiber. A digital sink device receives the at least one optical signal from a second end of the optical fiber and converts the optical signal into TMDS signals. A TMDS receiver converts the TMDS signals into control and digital video signals and transmits the control and digital video signals to the sink controller.

Abstract: A transmission device having optical fiber high definition digital audio-video data interface (HDMI/DVI/UDI), in which optical fiber is utilized as the physical connection for the logical channels of the transmission device, and is used to carry images, voices and auxiliary data of the logic channels. For the half-duplex transmission mode utilized by the display data channel, the reverse unit, the serial unit, and the multi-serial unit are properly arranged, thus fulfilling the DC balance requirement of optical fiber transmission, and resolving the lower tolerance rate shortcomings of the I2C bus specification of display data channel (DDC) and the customer electronics control (CEC) channel.

Abstract: Provided are a multi-aperture optical detector that can address structural problems such as a complex signal wiring in array type optical detectors, and a need for a plurality of low noise amplifiers, signal to noise ratio detectors, etc., and an optical signal detecting circuit including the multi-aperture optical detector. The multi-aperture optical detector includes transmission lines having two output terminals; and a plurality of unit optical detectors which respectively have random polarities through the transmission lines and are connected in parallel, and optical signals from each of the unit optical detectors are added and output through the two output terminals. The multi-aperture optical detector has a high operation band width and can detect optical signals with a high sensitivity by connecting a plurality of unit optical detectors that respectively have a low optical detecting sensitivity and are physically compact and small.

Abstract: Utility data modulation is superimposed on a payload data modulator optical signal by exploiting spread spectrum techniques by virtue of one embodiment of the present invention. Utility data transmission rates of e.g., 200 Kbps, can be achieved without impairment to payload data transmission. The utility data modulated signal spectrum overlaps or is entirely within the payload data modulation spectrum, therefore, overcoming problems with optical amplifier gain control and pink noise.

Abstract: A narrow-linewidth micropulse LIDAR transmitter based on a low-SBS single clad, small-mode-area optical fiber. High narrow-linewidth peak powers are achieved through the use of an erbium doped fiber with an acoustic waveguide. Over 6 ?J per pulse (100 ns pulse width) is achieved before a weak form of stimulated Brillouin scattering appears. This laser has the potential to scale to very high power in a low-SBS dual clad fiber.

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: Optical fiber interconnection devices, which can take the form of a module, are disclosed that include an array of optical fibers and multi-fiber optical-fiber connectors, for example, two twelve-port connectors or multiples thereof, and three eight-port connectors or multiples thereof. The array of optical fibers is color-coded and is configured to optically interconnect the ports of the two twelve-port connectors to the three eight-port connectors in a manner that preserves transmit and receive polarization. In one embodiment, the interconnection devices provide optical interconnections between twelve-fiber optical connector configurations to eight-fiber optical connector configurations, such as from twelve-fiber line cards to eight-fiber line cards, without having to make structural changes to cabling infrastructure. In one aspect, the optical fiber interconnection devices provide a migration path from duplex optics to parallel optics.

Abstract: A system includes a transmitter is configured to transmit an electromagnetic signal to a receiver, which is configured to receive the electromagnetic signal and another electromagnetic signal for mixing therewith. Propagation paths of the signals to the transmitter and receiver include a first propagation path of the electromagnetic signal to the transmitter, and a second propagation path of the other electromagnetic signal to the receiver. The arrangement, which is located along either or each of the propagation paths of signals to the transmitter and receiver, is configured to alter the length of a respective propagation path. And the processor configured to recover an amplitude and phase of the transmitted electromagnetic signal, including being configured to receive a sequence of samples of the received electromagnetic signal, and Discrete Fourier Transformation process the sequence of samples.

Abstract: Super-structured fiber Bragg gratings (SSFBGs) of s optical pulse time spreaders are provided with N unit FBGs disposed starting from an input/output end in the order of first to N-th unit FBGs, where s is a parameter less than or equal to a parameter N, a natural number. The unit FBGs are configured such that the reflectivities of the unit FBGs placed from one end to the center of the SSFBG formed in an optical fiber are monotonically increased, while the reflectivities of the unit FBGs placed from the center to the other end of the SSFBG are monotonically decreased. The chip pulses in a pulse train are given relative phases such that the relative phase of the first chip pulse is equal to zero, the relative phase of the second chip pulse is equal to a phase difference d1=2?{a+(n?1)/N}, . . . , and the relative phase of the N-th chip pulse is equal to (N?1)d1. The parameter a is any real number satisfying the condition of 0?a<1.

Abstract: A method for testing a fiber drop terminal from a single geographic location may include placing a signal onto a first optical fiber at the single geographic location. The first optical fiber is communicatively coupled to a first output receptacle on the fiber drop terminal. The method may also include detecting the signal via a second optical fiber at the single geographic location. The second optical fiber is communicatively coupled to a second output receptacle on the fiber drop terminal, and the second output receptacle is communicatively coupled to the first output receptacle via a loop-back assembly.

Abstract: A rotary transmitter having a first light-conducting hollow body, at least one transmitter for generating at least one optical signal and at least one receiver for receiving the optical signal is disclosed. The optical signal is transmitted from the transmitter to the receiver via the first light-conducting hollow body.

Abstract: With the light-emitting side focal point F1 (3) of a three-dimensional elliptical reflecting body A (500) being on the side of a rotating body (1), the light-receiving side focal point F2 (5) being on the side of a fixed body (2), the condensing action from the F1 (3) to F2 (5) is used to configure an optical path from a rotating-side light-emitting element A (13) set at F1 (3), via a fixed-side elliptical partial mirror (8) in which a portion of the three-dimensional elliptical body is used as a mirror face, to a fixed-side light-receiving element A (24) set at F2 (5), and to configure a simultaneous bidirectional single-channel optical path from a fixed-side light-emitting element A (23) set at F1 (3) of a three-dimensional elliptical reflecting body B (501), via a rotating-side elliptical partial mirror (6), to a rotating-side light-receiving element A (14) set at F2 (5).

Abstract: The present invention includes a fast algorithm to compute the pre-equalized waveform for simultaneous compensation of the self-phase modulation and chromatic dispersion experienced by a high-speed optical signal, e.g., at 10 Gb/s, and shows that it is used for an automatic self-adapting pre-equalization when the knowledge on transmission link details is inaccurate or incomplete.

Abstract: A cw-laser source transmits low-noise, narrow-linewidth optical power via an optical fiber to a bias-free electro-optic phase modulator at a remote site, where an antenna or an RF sensor is located. The RF electrical signal modulates the phase modulator at the remote site, converting an electrical signal into an optical signal. The phase-modulated optical signal is fed back via the optical fiber to an optical filter whose filter transfer characteristics can be tuned and reconfigured to cancel the intermodulation distortion terms, particularly the dominant 3rd order intermodulation, as well as the 2nd order. The filtered optical signal is converted to the RF signal at the photodetector. The optical filter is used to effectively “linearize” the signal at the receiver end, rather than at the modulator end.

Abstract: An optical interconnect system includes components such as circuit boards, server blades, or a backplane with respective light pipes for an optical signal. The light pipe in a component transmitting the optical signal receives a collimated beam and directs the collimated beam for transmission. The light pipe in a receiving component is nominally aligned with the light pipe pf the transmitting component and separated from the first light pipe by free space. The light pipe on the receiving side is larger than the light pipe on the transmitting side and can therefore accommodate an expected alignment error.

Abstract: The present invention provides a display system. The display system includes a control module, a display apparatus and an optical fiber module. The control module is used to process images and includes a first electrical-to-optical transducer unit for generating a forward light signal according to a digital image signal. The display apparatus is used to display images and includes a first optical-to-electrical transducer unit for transducing the light signal into a scaled image signal.

Abstract: An optical and electric signals transmission apparatus includes a receptacle having a light-receiving element and/or a light-receiving element and electrical connecting terminals, a plug having electrical connecting terminals to establish electrical coupling with the receptacle and optical coupling with the light-emitting element and/or the light-receiving element, an electric signal transmission line, and an optical signal transmission line. The receptacle has a fitting recess, and when the plug is fitted in the fitting recess in a direction substantially perpendicular to the optical axis of the light-emitting element or the light-receiving element, the optical coupling, the electrical coupling, and engagement of the receptacle with the plug are established at a location where the fitting recess and the plug are adjacent to each other.

Abstract: An optoelectronic package that employs a spacer tool system to properly align an optical component within the device is disclosed. In one embodiment, the package includes a mounting surface, and an optical component positioned on the mounting surface at a predetermined distance from a reference point. The optical component is positioned at the predetermined distance by a spacer tool, wherein the spacer tool is interposed between the optical component and a spacer tool mount during optical component positioning. The spacer tool is of a length that corresponds with the predetermined distance between the optical component and the reference point.

Abstract: A method for imaging objects through turbid media includes generating a repetitive pulsed light beam under control of a pulse shaper, propagating the light beam through turbid media, and receiving and imaging the light beam at a sensor. Propagation through turbid media causes scattering of the light, and the sensor captures scattered pulses to produce an image. The pulse shaper controls pulse width, frequency, repetition rate and chirp of the generated light pulses according to a feedback signal received from the sensor, to improve image quality. A system for imaging objects through turbid media includes a laser for generating a light beam; a pulse shaper for controlling said light beam, and a sensor, in communication with the pulse shaper, for capturing the image of said light beam through a turbid medium. Pulse width is less than 250 femtoseconds to reduce attenuation of the light beam through the turbid medium.

Abstract: The present invention is directed to a bi-directional optical monitor interconnect. The bi-directional monitor interconnect of the present invention includes an optical conductor with a first and second end. Disposed on the first end of the optical conductor is a first optical communication device and a first optical receiving device. Disposed on the second end of the optical conductor is a second optical communication device and a second optical receiving device. The first and second optical communication devices are capable of transmitting data over an optical connection. The first optical communication device is suitable for communicating via a first wavelength and the second optical communication device is capable of communicating over a second wavelength. The first receiving device is capable converting the second wavelength into electrical signals and the second receiving device is capable of converting the first wavelength into electrical signals.

Abstract: A communication light detecting device interconnecting light transmission paths and collocated therebetween, comprises: an optical coupling body including a core portion for photo coupling with the light transmission paths, and a light extracting portion for extracting a part of the communication light as a leakage light; and a light detecting portion having a light receiving member for receiving the leakage light. The light extracting portion is preferable to possess a lower refractive index than that of the core portion. Besides, the light extracting portion is preferable to include a light detecting use groove with a groove width of 50 ?m or more and 140 ?m or less formed by cutting and separating the core portion. Besides, the light extracting portion is preferable to be the optical coupling body in which outer diameter of the core portion is different from the outer diameter of a core of the light transmission path.

Abstract: A system or method of verifying a new contact position of a multi-pole electromechanical switch having a plurality of contact positions is disclosed. The switch is caused to move to a new contact position. Power is provided to at least one light transmitter to cause the at least one light transmitter to transmit light toward a light reflective portion. A particular light detector among a plurality of light detectors that has received light from the light reflective portion is identified. The new contact position is verified based on the identification.

Abstract: A system received an analogue electrical signal having content between 20 Hz and 20 kHz representing an analogue audio signal; amplitude modulates the analogue electrical signal onto an optical signal; transmits the modulated optical signal over an optical waveguide; receives. The modulated optical signal; and demodulates the modulated optical signal to reproduce the analogue electrical signal. The system may be incorporated within a cable arrangement.

Abstract: In an optical communication system in which an optical signal is sequentially transferred through a plurality of transmission sections of an entire transmission line between a most upstream node and a most downstream node, wherein the entire transmission line is sectioned by at least one intermediate node into the transmission sections, a transmission line optimization method includes: concurrently transmitting a test signal from an upstream node of each transmission section to a downstream node thereof, causing each downstream node to perform individual optimization of a corresponding transmission section in parallel; sequentially transmitting a first signal indicating completion of upstream individual optimization in a downstream direction from a most upstream immediate node to most downstream node through immediate nodes which has completed the individual optimization; and transmitting a second signal indicating completion of entire optimization in an upstream direction from the most downstream node to the

Abstract: A method for remote communication using the interpretation of thermoluminescence or photoluminescence signals uses a property of photoluminescence or of thermoluminescence when it is caused by entangled trapped electrons. In this case, stimulation of deexcitation of trapped electrons by heat or radiation occurs when the deexcitation thermal energy is approximately equal to the trap-emptying energy. Stimulation by a temperature rise of a “master” sample induces luminescence of a remote “slave” “entangled” sample, which is reproduced on lowering the temperature of the “master” sample whatever the distance and the media separating the “master” sample and the “slave” sample. This teaching and its generalization to other forms of stimulation is used by the method of interpreting the quantum reception measurements so as to determine, using a correlation method, the transmission of information or commands.

Abstract: A data link includes an ASIC. The data link includes a heat insulation layer in contact with the ASIC. The data link includes an optical transducer layer having a plurality of transducers, with each transducer of the plurality of transducers in communication with the ASIC. Each transducer converting optical signals to electrical signals or electrical signals to optical signals. The data link includes an optical waveguide layer having a plurality of waveguides for carrying optical signals. Each waveguide of the plurality of waveguides in optical communication with a transducer, the optical waveguide layer adjacent with the insulation layer. An apparatus for data. A method for transferring data.

Abstract: An all optical fiber bit stream reader system for examining the data contents of an optical fiber involving the conversion of a temporal timing signal into a spatially located signal is provided. The invention generally comprises generating and detecting a signal indicating the presence of data, in a manner which is minimally destructive to the data. One embodiment comprises providing a piece of optical fiber that exhibits a nonlinear response through a two photon absorption process and subsequent emission of a photon corresponding to the two photon absorption process. Such a fiber could comprise a conventional doped silica fiber into which an additional dopant has been introduced. Another embodiment involves modifying the index of refraction of the cladding of the optical fiber line. This causes a fraction of the electric field or light pulse guided through the fiber (if present) to be coupled out of the fiber. Thereafter, the pulse can be detected.