Abstract: An apparatus for fusion welding one or several parallel optical fibers (102) to the same number of waveguides (101) includes a fiber guiding device and a highly reflective surface (104) located below the fiber for each fiber-waveguide pair, and a laser beam (103) whose wavelength is chosen such that its light is strongly absorbed by the fiber material and its shape is properly adjusted.

Abstract: A device for improving auditory acuity of a patient includes an array of waveguides for directing light to the auditory nerve. The array of waveguides is disposed in a flexible structure. A deployment mechanism deploys the structure such that the waveguides are aligned with the auditory nerve. The flexible structure has a shape that is changeable during introduction into the cochlea so as to adapt the shape to a shape of the cochlea.

Abstract: An apparatus includes a light source, an optical fiber, having a tapered region, coupled to the light source, a stretchable microresonator in contact with the tapered region of the fiber and in contact with a magnetostrictive material, and a polarization controller that controls polarization of light in the tapered region.

Abstract: Reversible shape memory polymer bilayer actuators comprised of an active polyPOSS (PP) layer and a passive KAPTON layer. The PP is a unique polymeric composition which maintains its mechanical properties and coefficient of thermal expansion at elevated temperatures while adhering to the KAPTON layer. The actuator is durable to extreme conditions such as elevated temperatures and corrosive environments and maintains motion accuracy at the ?m-scale.

Abstract: A tunable optical filter includes a dispersive-collimating element, an electro-optical medium apparatus and a focusing-dispersive element such that the dispersive-collimating element assigns each beam wavelength to a particular spatial position, the beams being parallel to each other, the electro-optical medium apparatus changes the polarization state independently for each wavelength, and the focusing-dispersive element recombines the different wavelengths into one single beam.

Abstract: A system for dynamic mechanical analysis of a polymer includes a stationary crucible for receiving therein a polymer, a movable plunger operative to apply shear forces on the polymer, and a dynamic mechanical analyzer (DMA) including a movable shaft coupled to the plunger.

Abstract: A method of using a diode device including providing a diode that includes an active region including a 525 micron thick. 10 k?-cm, n-type, float zone wafer, and operating the diode as a silicon-avalanche semiconductor switch.

Abstract: A multimode diode laser (with a single transverse mode) is optically locked to a single Whispering Gallery Mode (WGM) of a microresonator via self-injection feedback. The tunability of the WGM-locked laser is achieved by locking the diode laser to different WGMs of the microresonator.

Abstract: An apparatus includes a dispersive-collimating element, a Faraday material apparatus and a focusing-dispersive element. The dispersive-collimating element assigns each beam wavelength to a particular spatial position. The beams are parallel one to the other. The Faraday material apparatus provides a polarization rotation independently for each wavelength, and the focusing-dispersive element recombines the different wavelengths into one single beam.

Abstract: An optical fiber heating device includes a heat producing fiber wrapped around a cell which is filled with an atom vapor.

Abstract: A seismic source apparatus, configured to be maneuvered by a vehicle over terrain.

Abstract: An optical seismic surveying system including, a multibeam laser source including a plurality of laser-sources, a Diffractive-Optical-Element (DOE), an imager and a processor. The laser-sources direct respective laser-beams toward a single common focal point. The DOE is located at a single common focal point and configured to split each laser-beam into a plurality of laser-beams, toward an instantaneous area of interest. The laser-beams impinging on the instantaneous area of interest produce a laser spot assemblage including a plurality of laser spots. The imager acquires a plurality of defocused images of speckle patterns produced by diffused reflections of the laser spots. The speckle pattern correspond to a respective laser spot and thus to a respective sensing point in the instantaneous area of interest.

Abstract: A method includes coupling an optical whispering gallery mode (WGM) resonator to an optical fiber by placing the optical fiber on the WGM resonator such that a contact portion of the optical fiber contacts the WGM resonator and two non-contact portions of the optical fiber extend beyond the contact portion, coupling the non-contact portions to locking screws, and adjusting positions of the locking screws to change a dimension of the contact portion.

Abstract: A method for performing a nonlinear optical operation includes pumping a laser with an optical signal at a pump wavelength and pumping the laser with an electronic or optical bias that acts as a hyperparameter, filtering out optical output at the pump wavelength so that only light at a lasing wavelength exits the laser, and collecting light exiting the laser for further optical processing or detection.

Abstract: A method for manufacturing an array of optical fiber ferrules includes producing on a first side of a wafer a pattern of an array of disks or holes (111, 112) in a metallic coating (121, 122). The metallic coating is covered with a negative photoresist layer. A second side of the wafer opposite to the first side is illuminated with light that propagates as a divergent or collimated beam through the photoresist layer, thereby creating a conical pattern within the photoresist layer. The photoresist layer is developed to create conical apertures. A sheet with a conical openings pattern registered to the conical apertures is attached so that a small diameter of each conical opening of the sheet is smaller than, and in contact with, a large diameter of the conical aperture to which it is registered, thereby forming an array of optical fiber ferrules.

Abstract: An optical fiber heating device includes a heat producing fiber wrapped around a cell which is filled with an atom vapor.

Abstract: A high-voltage fast-avalanche diode, being a silicon-avalanche shaper or sharpener (SAS), has a thick active region above 300 microns in thickness.

Abstract: An apparatus for fusion welding one or several parallel optical fibers (102) to the same number of waveguides (101) includes a fiber guiding device and a highly reflective surface (104) located below the fiber for each fiber-waveguide pair, and a laser beam (103) whose wavelength is chosen such that its light is strongly absorbed by the fiber material and its shape is properly adjusted.

Abstract: A method for efficient heat removal from a semiconducting device made from III-V semiconductor crystals includes depositing a diamond seeding layer on a patterned substrate.

Abstract: The present invention relates to an access control system, an access object and a method for access control. The access control system comprises an access request receiving device being configured and operable for receiving an access object; the access request receiving device comprising an emitter configured and operable for irradiating the access object with a radiation having a wavelength in the range of about 10?12 and 10?9 m and a detector configured and operable for detecting a response signal from the irradiated access object; a control circuit being configured and operable to receive the response signal from the access request receiving device and process the response signal to identify spectral features indicative of an XRF signature of the access object; wherein the control circuit is adapted to generate an unlocking signal for switching a module device between a locked state and an unlocked state upon identification of the XRF signature.