Abstract: An optoelectronic device (20, 50, 120, 320, 500, 540, 560, 600) includes an array (32, 72, 124) of optical transceiver cells (34, 74, 90, 126, 522) disposed on a planar substrate (30). Each transceiver cell includes an optical transducer (36) configured to couple optical radiation between the transceiver cell and a target. An optical distribution tree (122) including a network (38, 76, 428, 518, 524) of waveguides (142, 150) and switches (146, 429), is disposed on the substrate and coupled to convey coherent radiation from a radiation source (52, 128, 130, 426, 510, 606) to the optical transceiver cells. A controller (48) is configured to actuate the switches so as to select different subsets of the optical transceiver cells that are to receive the coherent radiation from the optical distribution tree and to transmit the coherent radiation toward the target at different times during a scan of the target.

Abstract: An optoelectronic apparatus includes a dual folding mirror, which is mounted on a carrier substrate and includes first and second reflecting surfaces disposed at opposite angles relative to a normal to the carrier substrate. First and second sensing devices are disposed respectively in proximity to the first and second reflecting surfaces. Each sensing device includes a planar substrate disposed on the carrier substrate and an array of sensing cells disposed on the planar substrate and including respective edge couplers disposed along the edge of the planar substrate so as to couple optical radiation between the sensing cells and the respective reflecting surface.

Abstract: An optoelectronic device (20, 90, 120) includes a photonic integrated circuit (PIC) (24, 92, 94, 126), which includes a PIC substrate (34), having a first side mounted on a carrier substrate (26, 96), first electrical connection pads (70, 130) on a second side of the PIC substrate, optical waveguides (52) on the PIC substrate, and electrical conductors (68, 134) disposed on the PIC substrate and connecting to one or more of the first electrical connection pads. At least one electronic integrated circuit (22, 100, 122, 124) includes a semiconductor substrate (74) having a third side mounted on the second side of the PIC substrate and second electrical connection pads (72, 128) on the semiconductor substrate in electrical communication with the first electrical connection pads. One or more electronic circuit components (76, 78, 80, 82) on the semiconductor substrate are connected electrically to the second electrical connection pads.

Abstract: An optoelectronic device (28, 130) includes an array (32, 152) of optical transceiver cells (34, 90, 162) including respective optical transducers (36, 134, 164) configured to couple optical radiation between the transceiver cells and a target through respective optical apertures defined by the optical transducers. A tunable radiation source (22, 210, 240) outputs coherent radiation while tuning a wavelength of the coherent radiation over a selected range. An optical distribution network (38) conveys the coherent radiation from the radiation source to the optical transceiver cells for transmission via the optical transducers toward the target. Projection optics (44, 140, 154) project the optical apertures onto respective fields of view on the target, and include a dispersive element (148, 156), which shifts the fields of view across the target responsively to the tuning of the wavelength.

Abstract: An optoelectronic apparatus includes a dual folding mirror, which is mounted on a carrier substrate and includes first and second reflecting surfaces disposed at opposite angles relative to a normal to the carrier substrate. First and second sensing devices are disposed respectively in proximity to the first and second reflecting surfaces. Each sensing device includes a planar substrate disposed on the carrier substrate and an array of sensing cells disposed on the planar substrate and including respective edge couplers disposed along the edge of the planar substrate so as to couple optical radiation between the sensing cells and the respective reflecting surface.

Abstract: An optoelectronic device (20, 50) includes a planar substrate (30), an optical bus (40, 82, 84, 96, 140, 150, 180, 182, 224) disposed on the substrate and configured to convey coherent radiation through the bus, and an array (32, 72) of sensing cells (34, 74, 90, 160, 170, 200, 212, 380) disposed on the substrate. Each sensing cell includes at least one tap (92, 94, 144, 146, 226, 228) coupled to extract a portion of the coherent radiation propagating through the optical bus, an optical transducer (36, 108, 162, 172, 202, 204, 214) configured to couple optical radiation between the sensing cell and a target external to the substrate, and a receiver (114, 174, 178, 216, 218), which is coupled to mix the coherent radiation extracted by the tap with the optical radiation received by the optical transducer and to output an electrical signal responsively to the mixed radiation.

Abstract: An optoelectronic device (20, 50) includes a planar substrate (30), an optical bus (40, 82, 84, 96, 140, 150, 180, 182, 224) disposed on the substrate and configured to convey coherent radiation through the bus, and an array (32, 72) of sensing cells (34, 74, 90, 160, 170, 200, 212, 380) disposed on the substrate. Each sensing cell includes at least one tap (92, 94, 144, 146, 226, 228) coupled to extract a portion of the coherent radiation propagating through the optical bus, an optical transducer (36, 108, 162, 172, 202, 204, 214) configured to couple optical radiation between the sensing cell and a target external to the substrate, and a receiver (114, 174, 178, 216, 218), which is coupled to mix the coherent radiation extracted by the tap with the optical radiation received by the optical transducer and to output an electrical signal responsively to the mixed radiation.

Abstract: A display system may display image frames. The system may include a scanning mirror and an array of staggered light emitting elements. The light emitting elements may emit image light and collimating optics may direct the light at the scanning mirror, which reflects the image light while rotating about an axis. Control circuitry may selectively activate the light emitting elements across tangential and sagittal axes of the image frame while controlling the scanning mirror to scan across the sagittal axis.

Abstract: Image projection apparatus includes an image generating assembly, which is configured to project a sequence of line images extending in a first direction. A scanning mirror is positioned to receive and to reflect the line images while rotating about a mirror axis parallel to the first direction. A pupil expander has an edge positioned to receive the line images reflected by the scanning mirror and a face extending in a second direction non-parallel to the first direction and to the edge, and which is configured to direct simultaneously through the face multiple, parallel replicas of the expanded line images arrayed along the second direction.

Abstract: Some embodiments of a mirror tilt actuator include a chassis, one or more magnetic yoke structures affixed to the chassis, and a carriage moveably mounted to the chassis. In some embodiments, the chassis includes an indentation for affixing one or more magnetic yoke structures, and the chassis further includes one or more bearing receivers for mounting a mirror carriage. In some embodiments, the carriage includes one or more bearing members. In some embodiments, the one or more bearing members rest in one or more respective bearing receivers of the chassis. In some embodiments, the one or more edge members terminate in one or more curved leading edge faces. Some embodiments further include a magnet fixedly mounted to the carriage, a magnetic coil wrapped around a coil shaft mounted to the chassis.

Abstract: A scanning device includes a planar scanning mirror disposed within a frame and having a reflective upper surface. A pair of flexures have respective first ends connected to the frame and respective second ends connected to the mirror at opposing ends of a rotational axis of the mirror. A rotor including a permanent magnet is disposed on the lower surface of the mirror. A stator includes first and second cores disposed in proximity to the rotor on opposing first and second sides of the rotational axis and first and second coils of wire wound respectively on the cores. A drive circuit drives the first and second coils with respective electrical currents including a first component selected so as to control a transverse displacement of the mirror and a second component selected so as to control a rotation of the mirror about the rotational axis.

Abstract: An optical device includes a transmitter, which emits a beam of optical radiation, and a receiver, which includes a detector configured to output a signal in response to the optical radiation. An active area of the detector has a first dimension along a first axis and a second dimension, which is less than the first dimension, along a second axis perpendicular to the first axis. An anamorphic lens, which collects and focuses the optical radiation onto the active area of the detector, has a first focal length in a first plane containing the first axis and a second focal length, greater than the first focal length, in a second plane containing the second axis. A scanner scans the beam across a target scene in a scan direction that is aligned with the first axis, and directs the optical radiation that is reflected from the target scene toward the receiver.

Abstract: An optical apparatus includes an optically transparent slab waveguide including first and second, mutually-parallel planar faces and an edge non-parallel to the planar faces. A radiation source directs a beam of optical radiation to enter the waveguide through the first planar face at an entrance location and entrance angle selected so that the beam subsequently exits the waveguide at an exit location in a surface selected from among the second planar face and the edge. A scanning mirror is positioned to receive the beam that has exited through the surface and to reflect the beam back through the surface into the waveguide while the scanning mirror rotates about an axis parallel to the surface over a range of angles selected so as to cause the beam, after reflection back into the waveguide through the surface, to propagate within the waveguide by total internal reflection (TIR).

Abstract: A display system may display image frames. The system may include multiple sets of laser dies. Each set of laser dies may emit a respective set of beams of light to a photonic integrated circuit. Each set of beams may include light in at least three wavelength ranges that include visible and/or infrared wavelengths. Channels in the photonic integrated circuit may receive the sets of beams with a first pitch and may emit the set of beams with a second pitch that is finer than the first pitch and at a given angular separation to tangential and sagittal axis scanning mirrors.

Abstract: An optoelectronic device includes a silicon substrate, with a silicon waveguide layer disposed over the silicon substrate and including an optical waveguide. One or more through-silicon vias (TSVs) extend through the silicon substrate and contact the silicon waveguide layer. A III-V base layer is disposed over the silicon waveguide layer, and an optical amplifier is disposed on the III-V base layer and optically coupled to the optical waveguide.

Abstract: A scanning device includes a planar scanning mirror disposed within a frame and having a reflective upper surface. A pair of flexures have respective first ends connected to the frame and respective second ends connected to the mirror at opposing ends of a rotational axis of the mirror. A rotor including a permanent magnet is disposed on the lower surface of the mirror. A stator includes first and second cores disposed in proximity to the rotor on opposing first and second sides of the rotational axis and first and second coils of wire wound respectively on the cores. A drive circuit drives the first and second coils with respective electrical currents including a first component selected so as to control a transverse displacement of the mirror and a second component selected so as to control a rotation of the mirror about the rotational axis.

Abstract: An apparatus for driving and position sensing in a comb-drive actuator includes a generator, a driver circuit, sensing circuitry, and signal processing circuitry. The generator is configured to apply a sensing-voltage to a first electrode of the comb-drive actuator. The driver circuit is configured to apply a drive-voltage to a second electrode of the comb-drive actuator, having an opposite polarity relative to the first electrode. The sensing circuitry is configured to measure at the second electrode a sensed-waveform resulting from the sensing-voltage applied to the first electrode. The signal processing circuitry is configured to estimate a position of the first electrode relative to the second electrode based on the sensed-waveform.

Abstract: Some embodiments of a mirror tilt actuator include a chassis, one or more magnetic yoke structures affixed to the chassis, and a carriage moveably mounted to the chassis. In some embodiments, the chassis includes an indentation for affixing one or more magnetic yoke structures, and the chassis further includes one or more bearing receivers for mounting a mirror carriage. In some embodiments, the carriage includes one or more bearing members. In some embodiments, the one or more bearing members rest in one or more respective bearing receivers of the chassis. In some embodiments, the one or more edge members terminate in one or more curved leading edge faces. Some embodiments further include a magnet fixedly mounted to the carriage, a magnetic coil wrapped around a coil shaft mounted to the chassis.

Abstract: An optical device includes a laser light source configured to emit a collimated beam of light, and a scanning mirror, which is configured to reflect and scan the beam of light over a predefined angular range. The optical device further includes a volume holographic grating (VHG), which is positioned to receive and reflect the collimated beam emitted by the laser light source toward the scanning mirror by Bragg reflection at a predefined Bragg-angle, while transmitting the beam reflected from the scanning mirror over a part of the angular range that is outside a cone containing the Bragg-angle.

Abstract: Optical apparatus includes a shaft, which is configured to rotate about an axis of the shaft relative to a base. A mirror is fixed to the shaft so that the mirror rotates about the axis. A rotor including a permanent magnet is fixed to rotate with the shaft. A stator is configured to generate a magnetic field having a DC component in a vicinity of the rotor. A torsion spring, extending along the axis, has a first end that is attached to rotate with the shaft and a second end attached to the base.