Abstract: In an optical emitter device, when point emitters are placed on the focal plane of a lens system, each individual point emitter will point to a specific free space angle depending on the position of the point emitter relative to the longitudinal central axis of the lens system. Point emitters comprising end-fire tapers combined with both a turning mirror and a micro-lens provide improved performance, because, unlike grating couplers, end-fire tapers enable uniform broadband operation with all possible polarization states. A turning mirror may be added to direct the light emission from the end-fire tapers to vertically upwards, which enables both a two-dimensional point emitter array and a more streamlined assembly process.

Abstract: Optical switch trees are commonly used to route light from one input channel to multiple possible output channels one at a time. As the number of output channels increases, the number of wire-bonding pads increases and the drive electronics becomes more complicated. The optical switch tree comprises an array of optical switches arranged in a plurality of rows of optical switches, each connected by a row bus, which are connected to a first multiplexer and a common power source; and a plurality of columns of optical switches, each connected by a column bus, which are connected to a second multiplexer and a common ground. A control processor selects one of the plurality of columns of optical switches to connect to the common ground, and selects one of the plurality of rows of optical switches to connect to the common power source, thereby selecting a single optical switch in the array of optical switches to activate.

Abstract: What is disclosed are systems and methods for measurement, pre-distortion, and linearization of FMCW (Frequency Modulated Continuous Wave) LiDAR chirped laser signals, in which I/Q channels of an IF optical signal of a combination of delayed and undelayed versions of the laser signal are generated and used in the process of pre-distorting waveform data for linearization.

Abstract: An optical phased array comprising a row-column driving mechanism is disclosed that reduces the number of digital to analog converter (DAC) channels to the number of rows N and the total number of interface pin counts down to the number of columns plus the number of rows M+N. Disclosed herein are systems and architecture for thermal waveguide-based phase shifters which improve thermal efficiency by having multi-pass waveguides arranged proximate a heating element in a serpentine fashion, which enables an increase in phase shift without increasing the length or the power consumption of the heating element by increasing the total length of waveguide being heated by a singular heating element.

Abstract: Disclosed are integrated photonics systems including integrated polarizing devices for implementing on-chip optical isolators and circulators. Implemented around a Faraday rotator isolator arrangement, integrated photonic components are arranged in a device to polarize and rotate the polarization of optical signals traversing forwards and backwards through the device to effect optical isolators and circulators.

Abstract: Disclosed are integrated photonics systems including polarization controllers for photonics systems which incorporate integrated photonics for implementing polarization effects in optical signals. Integrated photonic components separate, control, and combine the polarization components of optical signals, using a polarization splitter combiner, at least one phase shifter and a least one splitter.

Abstract: A cryogenic optoelectronic data link, comprising a sending module operating at a cryogenic temperature less than 100 K. An ultrasensitive electro-optic modulator, sensitive to input voltages of less than 10 mV, may include at least one optically active layer of graphene, which may be part of a microscale resonator, which in turn may be integrated with an optical waveguide or an optical fiber. The optoelectronic data link enables optical output of weak electrical signals from superconducting or other cryogenic electronic devices in either digital or analog form. The modulator may be integrated on the same chip as the cryogenic electrical devices. A plurality of cryogenic electrical devices may generate a plurality of electrical signals, each coupled to its own modulator. The plurality of modulators may be resonant at different frequencies, and coupled to a common optical output line to transmit a combined wavelength-division-multiplexed (WDM) optical signal.

Abstract: Disclosed herein are systems and architecture for thermal waveguide-based phase shifters which improve thermal efficiency by having multi-pass waveguides arranged under the heating element in a serpentine fashion, with the waveguides having mismatched propagation constants. The combination allows for an increase in phase shift without increasing the length or the power consumption of the resistive heating element by increasing the total length of waveguide being heated by a singular heating element.

Abstract: Optical switch trees are commonly used to route light from one input channel to multiple possible output channels one at a time. As the number of output channels increases, the number of wire-bonding pads increases and the drive electronics becomes more complicated. The optical switch tree comprises an array of optical switches arranged in a plurality of rows of optical switches, each connected by a row bus, which are connected to a first multiplexer and a common power source; and a plurality of columns of optical switches, each connected by a column bus, which are connected to a second multiplexer and a common ground. A control processor selects one of the plurality of columns of optical switches to connect to the common ground, and selects one of the plurality of rows of optical switches to connect to the common power source, thereby selecting a single optical switch in the array of optical switches to activate.

Abstract: A cryogenic optoelectronic data link, comprising a sending module operating at a cryogenic temperature less than 100 K. An ultrasensitive electro-optic modulator, sensitive to input voltages of less than 10 mV, may include at least one optically active layer of graphene, which may be part of a microscale resonator, which in turn may be integrated with an optical waveguide or an optical fiber. The optoelectronic data link enables optical output of weak electrical signals from superconducting or other cryogenic electronic devices in either digital or analog form. The modulator may be integrated on the same chip as the cryogenic electrical devices. A plurality of cryogenic electrical devices may generate a plurality of electrical signals, each coupled to its own modulator. The plurality of modulators may be resonant at different frequencies, and coupled to a common optical output line to transmit a combined wavelength-division-multiplexed (WDM) optical signal.

Abstract: Optical switch trees are commonly used to route light from one input channel to multiple possible output channels one at a time. As the number of output channels increases, the number of wire-bonding pads increases and the drive electronics becomes more complicated. The optical switch tree comprises an array of optical switches arranged in a plurality of rows of optical switches, each connected by a row bus, which are connected to a first multiplexer and a common power source; and a plurality of columns of optical switches, each connected by a column bus, which are connected to a second multiplexer and a common ground. A control processor selects one of the plurality of columns of optical switches to connect to the common ground, and selects one of the plurality of rows of optical switches to connect to the common power source, thereby selecting a single optical switch in the array of optical switches to activate.

Abstract: What is disclosed are systems and methods for measurement, pre-distortion, and linearization of FMCW (Frequency Modulated Continuous Wave) LiDAR chirped laser signals, in which I/Q channels of an IF optical signal of a combination of delayed and undelayed versions of the laser signal are generated and used in the process of pre-distorting waveform data for linearization.

Abstract: An optical emitter device includes an emitter array comprising a plurality of end-fire tapers, each end-fire taper configured to selectively emit a respective beam of light. A lens system is configured to shape and direct each beam of light based on a position of the respective end-fire taper relative to an optical axis of the lens system. A rotating reflector, including an axis of rotation perpendicular to the optical axis of the lens system, is configured to redirect and scan the beams of light through a scanning range.

Abstract: A millimeter scale weak grating coupler comprising a silicon waveguide having bars of overlay material of length (a) disposed periodically at a period (?) adjacent the silicon waveguide whereby a uniform grating output is achieved.

Abstract: Disclosed herein are systems and architecture for thermal waveguide-based phase shifters which improve thermal efficiency by having multi-pass waveguides arranged under the heating element in a serpentine fashion, with the waveguides having mismatched propagation constants. The combination allows for an increase in phase shift without increasing the length or the power consumption of the resistive heating element by increasing the total length of waveguide being heated by a singular heating element.

Abstract: Disclosed herein are systems and architecture for sending and receiving collimated beams directly from a photonic chip via on-chip mirror beamforming device to reduce manufacturing difficulties and optical aberrations. More specifically, an elliptical or parabolic mirror may be used in the photonic chip to collimate beams emitted from a waveguide port and to further enable techniques, such as wavefront error correction and beam steering, without moving parts.

Abstract: Disclosed herein are systems and architecture for thermal waveguide-based phase shifters which improve thermal efficiency by having multi-pass waveguides arranged under the heating element in a serpentine fashion, with the waveguides having mismatched propagation constants. The combination allows for an increase in phase shift without increasing the length or the power consumption of the resistive heating element by increasing the total length of waveguide being heated by a singular heating element.

Abstract: An optical emitter device includes an emitter array comprising a plurality of end-fire tapers, each end-fire taper configured to selectively emit a respective beam of light. A lens system is configured to shape and direct each beam of light based on a position of the respective end-fire taper relative to an optical axis of the lens system. A rotating reflector, including an axis of rotation perpendicular to the optical axis of the lens system, is configured to redirect and scan the beams of light through a scanning range.

Abstract: Optical switch trees are commonly used to route light from one input channel to multiple possible output channels one at a time. As the number of output channels increases, the number of wire-bonding pads increases and the drive electronics becomes more complicated. The optical switch tree comprises an array of optical switches arranged in a plurality of rows of optical switches, each connected by a row bus, which are connected to a first multiplexer and a common power source; and a plurality of columns of optical switches, each connected by a column bus, which are connected to a second multiplexer and a common ground. A control processor selects one of the plurality of columns of optical switches to connect to the common ground, and selects one of the plurality of rows of optical switches to connect to the common power source, thereby selecting a single optical switch in the array of optical switches to activate.

Abstract: An optical phased array comprising a row-column driving mechanism is disclosed that reduces the number of digital to analog converter (DAC) channels to the number of rows N and the total number of interface pin counts down to the number of columns plus the number of rows M+N. Disclosed herein are systems and architecture for thermal waveguide-based phase shifters which improve thermal efficiency by having multi-pass waveguides arranged proximate a heating element in a serpentine fashion, which enables an increase in phase shift without increasing the length or the power consumption of the heating element by increasing the total length of waveguide being heated by a singular heating element.