Abstract: There is described an optical device and a method of propagating an optical mode within an optical device such that the optical mode radiates at an angle. An optical core encased within a cladding layer extends towards a distal end of the optical device and transmits an optical mode. A radiation layer having a refractive index greater than the optical core is supported above the cladding layer and at least partially vertically overlaps the optical core. The optical core is configured to enlarge a spot size of the optical mode within a portion of the optical core that vertically overlaps the radiation layer, therefore causing the optical mode to radiate within the radiation layer at an angle.

Abstract: There is described an optical coupler having a plurality of waveguides arranged in a plurality of cladding layers, each cladding layer having at least one waveguide. One or more of the vertical distances between waveguides in adjacent cladding layers and transverse distances between waveguides in the same cladding layer may be configured to perform one or more of mode matching with an external light source, maintaining optical coupling between the plurality of waveguides, and ensuring optical efficiency of the optical coupler.

Abstract: There is described an adiabatic edge coupler comprising two coupled waveguides. A first waveguide extends from a tip width to a terminal width. A second waveguide comprises a first tapered portion that extends from a tip width to an intermediate width, and a second tapered portion that extends from the intermediate width to a terminal width. Upon receipt of an input optical signal, a coupled mode is formed between the two coupled waveguides. Over the first tapered portion, the coupled mode is adiabatically transformed onto the first waveguide. The coupled mode then decouples from the second waveguide over the second tapered portion. The adiabatic transformer enables low loss, small footprint, and fabrication-tolerant in-chip propagation of the coupled mode with relatively simplified fabrication processes and small critical dimensions.

Abstract: An apparatus includes a light source to provide a plurality of input optical modes in a squeezed state. The apparatus also includes a network of interconnected reconfigurable beam splitters (RBSs) configured to perform a unitary transformation of the plurality of input optical modes to generate a plurality of output optical modes. An array of photon counting detectors is in optical communication with the network of interconnected RBSs and configured to measure the number of photons in each mode of the plurality of the output optical modes after the unitary transformation. The apparatus also includes a controller operatively coupled to the light source and the network of interconnected RBSs. The controller is configured to control at least one of the squeezing factor of the squeezed state of light, the angle of the unitary transformation, or the phase of the unitary transformation.

Abstract: A method includes receiving a representation of an N-mode interferometer and a representation of at least one imperfection associated with the N-mode interferometer at a processor, N being a positive integer value. The processor identifies multiple two-mode interferometers and multiple phases based on the representation of the N-mode interferometer and the representation of the at least one imperfection. The multiple two-mode interferometers and the multiple phases are configured to apply a unitary transformation to an input signal. The method also includes sending a signal to cause at least one of storage or display of a representation of the multiple two-mode interferometers and a representation of the multiple phases.

Abstract: An apparatus includes a light source to provide a plurality of input optical modes in a squeezed state. The apparatus also includes a network of interconnected reconfigurable beam splitters (RBSs) configured to perform a unitary transformation of the plurality of input optical modes to generate a plurality of output optical modes. An array of photon counting detectors is in optical communication with the network of interconnected RBSs and configured to measure the number of photons in each mode of the plurality of the output optical modes after the unitary transformation. The apparatus also includes a controller operatively coupled to the light source and the network of interconnected RBSs. The controller is configured to control at least one of the squeezing factor of the squeezed state of light, the angle of the unitary transformation, or the phase of the unitary transformation.

Abstract: An apparatus includes a light source to provide a plurality of input optical modes in a squeezed state. The apparatus also includes a network of interconnected reconfigurable beam splitters (RBSs) configured to perform a unitary transformation of the plurality of input optical modes to generate a plurality of output optical modes. An array of photon counting detectors is in optical communication with the network of interconnected RBSs and configured to measure the number of photons in each mode of the plurality of the output optical modes after the unitary transformation. The apparatus also includes a controller operatively coupled to the light source and the network of interconnected RBSs. The controller is configured to control at least one of the squeezing factor of the squeezed state of light, the angle of the unitary transformation, or the phase of the unitary transformation.

Abstract: A method includes receiving a representation of an N-mode interferometer and a representation of at least one imperfection associated with the N-mode interferometer at a processor, N being a positive integer value. The processor identifies multiple two-mode interferometers and multiple phases based on the representation of the N-mode interferometer and the representation of the at least one imperfection. The multiple two-mode interferometers and the multiple phases are configured to apply a unitary transformation to an input signal. The method also includes sending a signal to cause at least one of storage or display of a representation of the multiple two-mode interferometers and a representation of the multiple phases.

Abstract: An apparatus includes a light source to provide a plurality of input optical modes in a squeezed state. The apparatus also includes a network of interconnected reconfigurable beam splitters (RBSs) configured to perform a unitary transformation of the plurality of input optical modes to generate a plurality of output optical modes. An array of photon counting detectors is in optical communication with the network of interconnected RBSs and configured to measure the number of photons in each mode of the plurality of the output optical modes after the unitary transformation. The apparatus also includes a controller operatively coupled to the light source and the network of interconnected RBSs. The controller is configured to control at least one of the squeezing factor of the squeezed state of light, the angle of the unitary transformation, or the phase of the unitary transformation.

Abstract: A photonic device comprises a plurality of resonators and a plurality of optical channels. Each resonator from the plurality of resonators has a set of resonance frequencies independently selected from a set of resonance frequencies of each remaining resonator from the plurality of resonators. Each resonator from the plurality of resonators lacks substantially any linear coupling between each remaining resonator from the plurality of resonators. The plurality of resonators defines a spatial overlap region between at least two resonators from the plurality of resonators such that nonlinear optical processes are substantially optimized during operation. A plurality of optical channels is operatively coupled to the plurality of resonators. The plurality of optical channels is configured to receive light from the plurality resonators and configured to send light into the plurality of resonators.

Abstract: A photonic device comprises a plurality of resonators and a plurality of optical channels. Each resonator from the plurality of resonators has a set of resonance frequencies independently selected from a set of resonance frequencies of each remaining resonator from the plurality of resonators. Each resonator from the plurality of resonators lacks substantially any linear coupling between each remaining resonator from the plurality of resonators. The plurality of resonators defines a spatial overlap region between at least two resonators from the plurality of resonators such that nonlinear optical processes are substantially optimized during operation. A plurality of optical channels is operatively coupled to the plurality of resonators. The plurality of optical channels is configured to receive light from the plurality resonators and configured to send light into the plurality of resonators.

Abstract: In a method of folding an airbag (10) for a vehicle occupant restraint system, especially of curtain-type side airbag, to form an airbag package (12?), the airbag (10) is rolled and/or folded to form an airbag roll (12) having a first volume (V1). The airbag roll (12) is fed to a pressing device (14) in which the airbag roll (12) is compressed to form an airbag package (12?) having a second volume (V2) which is smaller than the first volume (V1). The airbag roll (12) and, resp., the airbag package (12?) is heated within the pressing device (14) and the airbag package (12?) is cooled, with the airbag package (12?) retaining the second volume (V2) when it is removed from the pressing device (14; 114). The pressing device (14) includes a pressing mold or a molding shaft (18) whose height substantially corresponds to the desired height of the finished airbag packages (12?), a heating unit (20) for heating the airbag packages (12?) and a cooling device (22) for cooling the airbag packages (12?).

Abstract: An apparatus includes an optical medium characterized by a third-order nonlinear optical susceptibility. The apparatus also includes a pump light source in optical communication with the optical medium and configured to send a pump light beam to the optical medium. The pump light beam includes a pulsed light beam. The apparatus also includes a drive light source in optical communication with the optical medium and configured to send a drive light beam to the optical medium. The drive light beam includes a continuous wave (CW) light beam. The pump light beam and the drive light beam are configured to generate a signal light beam in a squeezed state of light via spontaneous four-wave mixing in the optical medium.

Abstract: An apparatus includes an optical medium characterized by a third-order nonlinear optical susceptibility. The apparatus also includes a pump light source in optical communication with the optical medium and configured to send a pump light beam to the optical medium. The pump light beam includes a pulsed light beam. The apparatus also includes a drive light source in optical communication with the optical medium and configured to send a drive light beam to the optical medium. The drive light beam includes a continuous wave (CW) light beam. The pump light beam and the drive light beam are configured to generate a signal light beam in a squeezed state of light via spontaneous four-wave mixing in the optical medium.

Abstract: In a method of folding an airbag (10) for a vehicle occupant restraint system, especially of curtain-type side airbag, to form an airbag package (12?), the airbag (10) is rolled and/or folded to form an airbag roll (12) having a first volume (V1). The airbag roll (12) is fed to a pressing device (14) in which the airbag roil (12) is compressed to form an airbag package (12?) having a second volume (V2) which is smaller than the first volume (V1). The airbag roll (12) and resp., the airbag package (12?) is heated within the pressing device (14) and the airbag package (12?) is cooled, with the airbag package (12?) retaining the second volume (V2) when it is removed from the pressing device (14; 114). The pressing device (14) includes a pressing mold or a molding shaft (18) whose height substantially corresponds to the desired height of the finished airbag packages (12?), a heating unit (20) for heating the airbag packages (12?) and a cooling device (22) for cooling the airbag packages (12?).

Abstract: Disclosed herein is a notch filter and a method for generating an electrical signal with a suppressed frequency band. The filter generates an optical signal by modulating a modulation optical wave with an electrical signal to generate first and second sidebands. The first sideband or the second sideband has less power than the other. The filter then modifies the optical signal by equalizing the power of light within the first side band at a selected frequency band and light within the second side band at the selected frequency band. The filter then produces an antiphase relationship between the light within the first side band at the selected frequency band and the light within the second side band at the selected frequency band. The filter then detects the modified optical signal to generate a copy of the electrical signal with suppressed frequency components within the selected frequency band.

Abstract: Abstract Disclosed herein is a notch filter and a method for generating an electrical signal with a suppressed frequency band. The filter generates an optical signal by modulating a modulation optical wave with an electrical signal to generate first and second sidebands. The first sideband or the second sideband has less power than the other. The filter then modifies the optical signal by equalising the power of light within the first side band at a selected frequency band and light within the second side band at the selected frequency band. The filter then produces an antiphase relationship between the light within the first side band at the selected frequency band and the light within the second side band at the selected frequency band. The filter then detects the modified optical signal to generate a copy of the electrical signal with suppressed frequency components within the selected frequency band.

Abstract: A latch mechanism latches a seat back (40), which is moveable relative to a seat base (20) between an upright position and a folded position. The latch mechanism comprises a pawl (60) connected with the seat back (40). The pawl (60) is moveable relative to the seat back (40) between an engaged position in which the pawl (60) is effective to prevent movement of the seat back (40) from the upright position and a disengaged position in which the pawl (60) is ineffective to prevent movement of the seat back (40) from the upright position. The latch mechanism further comprises a retaining member (100) connected with the seat back (40). The retaining member (100) is moveable from a first position to a second position upon movement of the seat back from the upright position. The retaining member (100) is effective to retain the pawl (60) against movement to the engaged position relative to the seat back (40) when the retaining member (100) is in the second position.