Abstract: A WSS device in which a VIPA is used as a spectral disperser. In an example embodiment, the VIPA is configured to produce two or more diffraction orders on the LCOS micro-display of the WSS device. The LCOS micro-display is configurable to independently process light corresponding to different diffraction orders. For example, the LCOS micro-display may be used to implement: (i) optical-signal switching by applying different relative phase shifts to light of different diffraction orders to cause constructive interference at a selected one of the optical ports of the WSS device; (ii) optical-signal splitting by steering light of different diffraction orders to at least two different selected optical ports of the WSS device; and (iii) controllable optical-signal attenuation by applying different relative phase shifts to different diffraction orders to control the relative degree of constructive and destructive interference at a selected one of the optical ports of the WSS device.

Abstract: Systems and methods are provided for reducing stimulation interference between two stimulation modules positioned on a user's body, which may be used in stimulation systems without a central treatment controller. Systems and methods are also provided for stimulation treatment using multiple independent stimulators wirelessly managed by a remote management device.

Abstract: Systems and methods are provided for reducing stimulation interference between two stimulation modules positioned on a user's body, which may be used in stimulation systems without a central treatment controller. Systems and methods are also provided for stimulation treatment using multiple independent stimulators wirelessly managed by a remote management device.

Abstract: A method for predicting at least one fitness value of a protein is implemented on a computer and includes the following steps: encoding the amino acid sequence of the protein into a numerical sequence according to a protein database, the numerical sequence comprising a value for each amino acid of the sequence; calculating a protein spectrum according to the numerical sequence; and for each fitness: comparing the calculated protein spectrum with protein spectrum values of a predetermined database, said database containing protein spectrum values for different values of said fitness, predicting a value of said fitness according to the comparison step.

Abstract: An apparatus includes a TDM PON optical transceiver including a direct-detection optical receiver. The direct-detection optical receiver is configured to demodulate data from a temporal segment of a data modulated optical signal, wherein the optical carrier frequency of the segment varies at a rate of, at least, 1 giga-Hertz per second.

Abstract: An OVNA system employing an array of reference delays to estimate distance-variant phase distortion in probe light during an optical-frequency sweep thereof. The estimated distance-variant phase distortion is then used to perform a phase correction for the digital electrical signals generated in response to the probe light being passed through a device under test (DUT) during the same optical-frequency sweep. Advantageously, the performed phase correction enables the OVNA system to provide a more-accurate determination of certain optical characteristics of the DUT than that achievable without such phase correction.

Abstract: A fiber-optic communication system having two optical channels characterized by different respective group velocities. In an example embodiment, the system comprises an optical receiver capable of measuring a difference in the time of arrival thereto, by way of the two optical channels, of the corresponding signal disturbances caused by a remote ambient event, such as an earthquake or a lightning strike. A signal processor of the receiver can then use the measured time-of-arrival difference to estimate the distance, along the fiber, to the location of the remote ambient event. In some example embodiments, the two optical channels may be different wavelength channels or different spatial modes of a multimode fiber. In some example embodiments, at least one of the two channels may be a payload-data-bearing channel.

Abstract: Various example embodiments for a wavelength selective switch including a direct grating interface are presented. In at least some example embodiments, a wavelength selective switch may include a light propagating element having a tilted fiber grating integrated therein, thereby providing a direct grating interface to the light propagating element. It is noted that use of such a direct grating interface may obviate the need for use of various components typically utilized within wavelength selective switches (e.g., front-end optics in the port direction, front-end optics and diffractive gratings in the wavelength direction, and so forth), thereby enabling the size of wavelength selective switches to be reduced or even for the wavelength selective switches to be made compact or even ultra-compact.

Abstract: An OVNA system employing an array of reference delays to estimate distance-variant phase distortion in probe light during an optical-frequency sweep thereof. The estimated distance-variant phase distortion is then used to perform a phase correction for the digital electrical signals generated in response to the probe light being passed through a device under test (DUT) during the same optical-frequency sweep. Advantageously, the performed phase correction enables the OVNA system to provide a more-accurate determination of certain optical characteristics of the DUT than that achievable without such phase correction.

Abstract: A WSS device in which a VIPA is used as a spectral disperser. In an example embodiment, the VIPA is configured to produce two or more diffraction orders on the LCOS micro-display of the WSS device. The LCOS micro-display is configurable to independently process light corresponding to different diffraction orders. For example, the LCOS micro-display may be used to implement: (i) optical-signal switching by applying different relative phase shifts to light of different diffraction orders to cause constructive interference at a selected one of the optical ports of the WSS device; (ii) optical-signal splitting by steering light of different diffraction orders to at least two different selected optical ports of the WSS device; and (iii) controllable optical-signal attenuation by applying different relative phase shifts to different diffraction orders to control the relative degree of constructive and destructive interference at a selected one of the optical ports of the WSS device.

Abstract: An optical imaging system capable of performing holographic imaging through a multimode optical fiber. Images of an object acquired by the system using different object-illumination conditions can advantageously be used to obtain a holographic image with reduced speckle contrast therein. Additionally, a beat-frequency map of the object acquired by the system using optical-reflectometry measurements therein can be used to augment the depth information of the holographic image for more-detailed three-dimensional rendering of the object for the user. Digital back-propagation techniques may be applied to reduce blurring in the holographic image and in the depth information caused, e.g., by modal dispersion and mode mixing in the multimode optical fiber. Some embodiments may also provide the capability for polarization-sensitive holographic imaging in different spectral regions of light.

Abstract: The disclosure herein is directed toward systems and methods for pairing two or more devices into a wireless network and transferring data between two or more electro-stimulation devices. Specifically, the systems and methods disclosed herein may include pairing two or more devices into a network configuration using, in part, a pairing device to distinctly identify the devices to be paired and to pair the identified devices into a network. Moreover, the systems and methods disclosed herein may include transferring data between two or more devices using, in part, one or more electro-stimulation contacts for electro-stimulation therapy and using, in part, the same one or more electro-stimulation contacts for transferring data between two or more devices.

Abstract: Systems and methods are provided for reducing stimulation interference between two stimulation modules positioned on a user's body, which may be used in stimulation systems without a central treatment controller. Systems and methods are also provided for stimulation treatment using multiple independent stimulators wirelessly managed by a remote management device.

Abstract: An apparatus includes a direct-detection optical data receiver to receive a data-modulated optical carrier. The direct-detection optical data receiver includes an optical power splitter, an array of at least three optical intensity detectors, and a digital signal processor. The digital signal processor is connected to receive digital values of intensity measurements of each of the optical intensity detectors of the array and to recover data of the received data-modulated optical signal from the digital values of the intensity measurements. The first optical intensity detector is connected to receive light from the optical power splitter via a dispersive optical path and the remaining of the optical intensity detectors of the array are connected to receive light from the optical power splitter via a multiple input and multiple output passive optical processing unit. The passive optical processing unit is configured to optically mix light received on different optical inputs thereof.

Abstract: This method for predicting at least one fitness value of a protein is implemented on a computer and include: calculating Q elementary numerical sequences, Q being an integer greater than or equal to 2, each elementary numerical sequence depending on a respective encoding of the amino acid sequence of the protein according to a protein database; determining an extended numerical sequence by concatenating the Q elementary numerical sequences; for each fitness: comparing the determined extended numerical sequence with reference extended numerical sequences of a predetermined database, the database containing reference extended numerical sequences for different values of the fitness; and predicting a value of the fitness according to the comparing.

Abstract: Systems and methods are provided for reducing stimulation interference between two stimulation modules positioned on a user's body, which may be used in stimulation systems without a central treatment controller. Systems and methods are also provided for stimulation treatment using multiple independent stimulators wirelessly managed by a remote management device.

Abstract: An optical frequency-domain reflectometer (OFDR) capable of estimating the transfer matrix of a multimode optical fiber using mode-selective measurements performed from a single end of the fiber. In an example embodiment, the multimode optical fiber includes distributed reflectors designed to generate relatively strong light reflections along the length of the fiber at a desired spatial resolution. The embodiments may employ a signal-processing algorithm to estimate the fiber's transfer matrix by estimating segment transfer matrices corresponding to the fiber segments located between different ones of the distributed reflectors. Different embodiments of the disclosed OFDR can beneficially be adapted for use in different applications, such as fiber-optic component and module characterization, distributed optical sensing, biomedical imaging, OCT, etc.

Abstract: The disclosure herein is directed toward systems and methods for pairing two or more devices into a wireless network and transferring data between two or more electro-stimulation devices. Specifically, the systems and methods disclosed herein may include pairing two or more devices into a network configuration using, in part, a pairing device to distinctly identify the devices to be paired and to pair the identified devices into a network. Moreover, the systems and methods disclosed herein may include transferring data between two or more devices using, in part, one or more electro-stimulation contacts for electro-stimulation therapy and using, in part, the same one or more electro-stimulation contacts for transferring data between two or more devices.

Abstract: An apparatus includes an optical data receiver to receive a phase-modulated optical signal and to demodulate data therefrom. The optical data receiver includes an optical power splitter, first and second optical intensity detectors, and a digital signal processor. The digital signal processor is connected to receive digital values of intensity measurements of each of the optical intensity detectors. The first optical intensity detector is connected to receive light from the optical power splitter via a first optical path, and the second optical intensity detector is connected to receive light from the optical power splitter via a second optical path. The first and second optical paths have channel functions with different frequency dependencies.

Abstract: An optical frequency-domain reflectometer (OFDR) capable of estimating the transfer matrix of a multimode optical fiber using mode-selective measurements performed from a single end of the fiber. In an example embodiment, the multimode optical fiber includes distributed reflectors designed to generate relatively strong light reflections along the length of the fiber at a desired spatial resolution. The embodiments may employ a signal-processing algorithm to estimate the fiber's transfer matrix by estimating segment transfer matrices corresponding to the fiber segments located between different ones of the distributed reflectors. Different embodiments of the disclosed OFDR can beneficially be adapted for use in different applications, such as fiber-optic component and module characterization, distributed optical sensing, biomedical imaging, OCT, etc.