Abstract: A device including a photonic integrated circuit comprising one or more OPOs each comprising: an input configured to receive a pump wave comprising pulses or a frequency comb with a pump repetition rate, one or a plurality of nonlinear sections as part of a resonator or coupled to a resonator having a free spectral range, where at least one of the free spectral range or one of its harmonics is matched to the pump repetition rate or its harmonics, and one or a plurality of outputs configured to extract a portion of the waves generated by the OPO in response to the pump wave and/or the pump wave.

Abstract: The present invention uses tunable or broadband integrated OPO with active or passive beam steering devices for high-speed ranging on a compact, low-cost platform. Examples of beam steering devices include grating couplers, optical phased arrays, arrayed waveguide delay lines, nanophotonic antennas, metasurfaces, etc. The beam steering device can be inside or outside of the OPO structure. Under broadband operation, the angular information is encoded in the spectral domain and vice versa, and the detector may have multiple spectral filters corresponding to different angles or a single tunable filter. The tunable filter can be electro-optic (EO) based or piezoelectric (PZT)-based. This invention can be realized across multiple material platforms with application specific parameters to optimize performance, such as bandwidth, tuning range, tuning speed, spatial/temporal resolution, polarization, field of view (FOV), etc. Scanning can be done in 1D and 2D.

Abstract: A device useful as a spectrometer or a sensor, comprising a source of a short electromagnetic pulses at a first wavelength and having a full width at half maximum in a range of 1 femtosecond-1 nanosecond; a sample holder in which the short pulses interact with the sample in the sample holder so as to form an output signal comprising a background residual of the short pulses and a sample response signal in the time domain, and an amplifier comprising nonlinear medium. The nonlinear medium comprises an input for receiving the output signal and a pump pulse at a second wavelength, and a second-order nonlinearity configured for a nonlinear process selectively amplifying the sample response signal, for example by temporally overlapping the pump pulse and the sample response signal.

Abstract: An on-chip pulse synthesizer including an integrated photonic chip that temporally and spectrally shapes pulses of light using primarily quadratic optical nonlinearities. Through this synthesis, the light pulses undergo temporal shortening or reshaping, spectral broadening, wavelength conversion, or a combination thereof. A key aspect of this synthesis is the mode engineering of the waveguides, which includes converting the pump source mode to the relevant mode in the nonlinear optical region and tailoring the waveguide geometry and material stack to enable dispersion-engineering as well as engineering of the phase matching for various nonlinear processes.

Abstract: A device implementing a nonlinear activation function including a material having nonlinear susceptibility phase-matching a coherent nonlinear interaction involving a signal comprising a signal wavelength and a bias comprising a bias wavelength, so that (1) a first phase difference between the signal and the bias induces the interaction comprising second harmonic generation (generating a second harmonic of the bias wavelength) or sum frequency generation (generating a sum frequency of the bias and the signal, and (2) a second phase difference between the signal and the bias induces the interaction comprising parametric amplification amplifying the bias and attenuating the signal. A positive input to the nonlinear activation function is represented by the signal having an input energy and the first phase difference. A negative input is represented by second phase difference. The output is an output energy of the signal as function of the input energy.

Abstract: A sensor including a resonator comprising a nonlinear material comprising a nonlinear susceptibility configured to convert a pump electromagnetic wave (EM) wave to a signal EM wave and an idler EM wave, wherein at least one of the pump EM wave, the signal EM wave and/or the idler EM wave is fed back through the nonlinear material to form one or more resonant EM waves. An actuator coupled to the resonator or a pump path to the resonator, controls at least one of a pump power of the pump EM wave, a detuning of the frequency modes of the resonator relative to one or more frequencies of the resonant EM waves, or a phase matching of the nonlinear material. An output of the resonator outputs one or more output EM waves comprising information about a sample coupled to the resonator.

Abstract: On-chip generation of coherent radiation, i.e. laser-like radiation, can be tuned over broad and/or hard-to-access wavelength regions in an integrated platform. Target spectral coverage is beyond what could be achieved with existing integrated laser systems.

Abstract: A label holder includes a base, a sign sleeve for receiving at least one printed price label and a living hinge coupling the base to the sign sleeve. The sign sleeve is defined by a main panel that is substantially planar and a return flange that is coupled to the main panel at a joined end. The return flange extends upward from the joined end and terminates at an end located along the main panel.

Abstract: A label holder includes a base, a sign sleeve for receiving at least one printed price label and a living hinge coupling the base to the sign sleeve. The sign sleeve is defined by a main panel that is substantially planar and a return flange that is coupled to the main panel at a joined end. The return flange extends upward from the joined end and terminates at an end located along the main panel.

Abstract: A process for disproportionating isopentane into isomers of hexane and butane that utilizes a fixed bed reactor employing a catalyst composition comprising aluminum halide. The process additionally includes a product separation zone which can be configured to recover and return at least a portion of the isopentane product stream to the inlet of the disproportionation reactor.

Abstract: A system for increasing the isobutane to olefin ratio in an alkylation process/system is disclosed. The system includes provisions for charging a portion of the settler effluent as a feed to at least one reaction zone downflow from the first reaction zone of a multi-zone alkylation reactor along with a portion of the olefin feed to the multi-zone alkylation reactor.

Abstract: A method is disclosed for removing water from an alkylation process system using a water removal column to remove water from a re-run column (catalyst regeneration column) overhead stream.

Abstract: A system and/or process for increasing the isobutane to olefin ratio in an alkylation process/system is disclosed. The system and/or process includes provisions for charging a portion of the settler effluent as a feed to at least one reaction zone downflow from the first reaction zone of a multi-zone alkylation reactor along with a portion of the olefin feed to the multi-zone alkylation reactor.

Abstract: A method is disclosed for removing water from an alkylation process system using a water removal column to remove water from a re-run column (catalyst regeneration column) overhead stream.

Abstract: A system and/or process for increasing the isobutane to olefin ratio in an alkylation process/system is disclosed. The system and/or process includes provisions for charging a portion of the settler effluent as a feed to at least one reaction zone downflow from the first reaction zone of a multi-zone alkylation reactor along with a portion of the olefin feed to the multi-zone alkylation reactor.

Abstract: A process for disproportionating isopentane into isomers of hexane and butane that utilizes a fixed bed reactor employing a catalyst composition comprising aluminum halide. The process additionally includes a product separation zone which can be configured to recover and return at least a portion of the isopentane product stream to the inlet of the disproportionation reactor.

Abstract: A method of fabricating articles from precipitation hardening aluminum alloys wherein the alloy is thermomechanically treated to control the characteristics of its microstructure before forging occurs in hot dies in an isothermal condition so that deformation occurs at a minimum strain rate. The forging temperature is above the solutionizing temperature of the alloy being forged.