Abstract: System and methods for Light Detecting and Ranging (LIDAR) are disclosed. The LIDAR system includes a light source configured to generate a tunable beam, an optical beam steering device positioned to receive at least a portion of the beam and configured to sweep the beam over a range of angles in a field of view (FOV) wherein each discrete frequency of the beam corresponds to a different angle in the FOV, a detector configured to generate an interference signal based on the received portions of the beam, and a processor communicably coupled to the detector. The processor is configured to cause the light source to tune the tunable beam from a first frequency to a second frequency and to calculate a range of an object corresponding to either the first frequency or the second frequency within the FOV.

Abstract: Multi-wavelength external cavity laser devices are generally described. The device includes a gain medium, a reflector, a wavelength selective element, and a chirped grating reflector. The wavelength selective element filters light having a first wavelength, and the chirped grating reflector reflects the light having the first wavelength. The light travels back to the reflector. As a result, the chirped grating reflector and the reflector define an optical cavity for the light having the first wavelength.

Abstract: A beam steering system includes a light source configured to generate an optical beam at various wavelengths. An array of emitters receives the beam and selectively emits the beam. An optical device receives the beam and directs the beam into an external environment of the beam steering system. The beam is directed into the external environment at different angles corresponding to a location of the emitter and the wavelength of the beam. As a result, the beam steering system steers the beam for a three-dimensional scan of the external environment.

Abstract: A LIDAR sensing system includes a light source that is controlled to project a collimated beam at various wavelengths. An interferometer receives the collimated beam and projects an object beam corresponding to the collimated beam at a diffraction grating. The object beam is diffracted from the diffraction grating at different angles corresponding to the wavelength of the collimated beam, creating a two dimensional scan along a first axis. The object beam is also controlled along a second axis that is perpendicular to the first axis. As a result, the LIDAR sensing system generates a horizontal and vertical scan (e.g., a three-dimensional scan) of the external environment.

Abstract: Mechanisms and systems for compact beam steering disclosed. A beam scanning device can include a first scanner mirror that receives a beam of light generated by a light source, and steers the beam of light through a reflection mechanism. The beam scanning device can include a second scanner mirror that receives the beam of light from the reflection mechanism. The beam scanning device can include a set of gears coupled to the first scanner mirror and the second scanner mirror that, when driven, rotate the first scanner mirror and the second scanner mirror at predetermined speeds. The beam scanning device includes an actuator that rotates the set of gears, the first scanner mirror, and the second scanner mirror at the predetermined speeds, causing the beam of light to reflect across the first and second scanner mirrors in a predetermined scanning pattern.

Abstract: System and methods for Light Detecting and Ranging (LIDAR) are disclosed. The LIDAR system includes a light source that is configured project a beam at various wavelengths toward a wavelength dispersive element. The wavelength dispersive element is configured to receive the beam and direct at least a portion of the beam into a field of view (FOV) at an angle dependent on frequency. The system also includes a detector that is positioned to receive portions of the beam reflected from an object within the FOV and a processor that is configured to control the light source and determine a velocity of the object.

Abstract: Systems and methods for alignment and testing of a photonic device include a light source, an interferometer, a detector, and a processing circuit. The processing circuit may generate control signal(s) for the light source to project a beam through the interferometer to a device under testing (DUT). The interferometer may receive an interference beam from an optical fiber of the DUT. The processing circuit may align optical fiber(s) for the DUT, determine one or more characteristics for the DUT, and so forth based on the interference beam and a reference beam generated by the interferometer.

Abstract: System and methods for Light Detecting and Ranging (LIDAR) are disclosed. The LIDAR system includes a light source configured to generate a tunable beam, an optical beam steering device positioned to receive at least a portion of the beam and configured to sweep the beam over a range of angles in a field of view (FOV) wherein each discrete frequency of the beam corresponds to a different angle in the FOV, a detector configured to generate an interference signal based on the received portions of the beam, and a processor communicably coupled to the detector. The processor is configured to cause the light source to tune the tunable beam from a first frequency to a second frequency and to calculate a range of an object corresponding to either the first frequency or the second frequency within the FOV.

Abstract: An OCT system is arranged to capture a three-dimensional (3D) OCT scan of a target. The OCT system projects a beam scan towards the target, and the OCT system generates data corresponding to the beam scan. Additionally, an image sensor is arranged to capture an image of a trace of the beam scan on a surface of the target. Using the image of the trace, various characteristics of the target are determined.

Abstract: Systems and methods for alignment and testing of a photonic device include a light source, an interferometer, a detector, and a processing circuit. The processing circuit may generate control signal(s) for the light source to project a beam through the interferometer to a device under testing (DUT). The interferometer may receive an interference beam from an optical fiber of the DUT. The processing circuit may align optical fiber(s) for the DUT, determine one or more characteristics for the DUT, and so forth based on the interference beam and a reference beam generated by the interferometer.

Abstract: System and methods for Light Detecting and Ranging (LIDAR) are disclosed. The LIDAR system includes a light source that is configured project a beam at various wavelengths toward a wavelength dispersive element. The wavelength dispersive element is configured to receive the beam and direct at least a portion of the beam into a field of view (FOV) at an angle dependent on frequency. The system also includes a detector that is positioned to receive portions of the beam reflected from an object within the FOV and a processor that is configured to control the light source and determine a velocity of the object.

Abstract: A LIDAR sensing system includes a light source that is controlled to project a collimated beam at various wavelengths. An interferometer receives the collimated beam and projects an object beam corresponding to the collimated beam at a diffraction grating. The object beam is diffracted from the diffraction grating at different angles corresponding to the wavelength of the collimated beam. As a result, the LIDAR sensing system generates a vertical scan (e.g., a two-dimensional scan) of the external environment. Various components of the LIDAR sensing system are then configured to rotate to produce multiple vertical scans, thus generating a three-dimensional scan.

Abstract: A LIDAR sensing system includes a light source that is controlled to project a collimated beam at various wavelengths. An interferometer receives the collimated beam and projects an object beam corresponding to the collimated beam at a diffraction grating. The object beam is diffracted from the diffraction grating at different angles corresponding to the wavelength of the collimated beam, creating a two dimensional scan along a first axis. The object beam is also controlled along a second axis that is perpendicular to the first axis. As a result, the LIDAR sensing system generates a horizontal and vertical scan (e.g., a three-dimensional scan) of the external environment.

Abstract: Methods and devices for accurate noninvasive measurement of blood analyte concentrations are disclosed. In an example process, optical properties of a blood vessel proximate to the surface of an exposed body part, for example, the sclera or the backside of the eye lid, is measured. Analyte concentrations are determined based on the measured optical properties.

Abstract: A LIDAR sensing system includes a light source that is controlled to project a collimated beam at various wavelengths. An interferometer receives the collimated beam and projects an object beam corresponding to the collimated beam at a diffraction grating. The object beam is diffracted from the diffraction grating at different angles corresponding to the wavelength of the collimated beam, creating a two dimensional scan along a first axis. The object beam is also controlled along a second axis that is perpendicular to the first axis. As a result, the LIDAR sensing system generates a horizontal and vertical scan (e.g., a three-dimensional scan) of the external environment.

Abstract: Optical coherence tomography (OCT) systems using a polarization switch and/or a polarization beam splitter are generally described. In an example, an OCT system includes a light source configured to emit a beam and an interferometer configured to receive the beam. The interferometer includes a reference path and an interferometer sample path. The OCT system further includes a polarization switch configured to selectively change a polarization state of the beam and a lens system that includes a first sample path and a second sample path. The polarization switch is further configured to direct the beam onto the first sample path upon selection of a first polarization state and to direct the beam onto the second sample path upon selection of a second polarization state that is different from the first polarization state.

Abstract: Methods and devices for accurate noninvasive measurement of blood analyte concentrations are disclosed. In an example process, optical properties of a blood vessel proximate to the surface of an exposed body part, for example, the sclera or the backside of the eyelid, is measured. Analyte concentrations are determined based on the measured optical properties.

Abstract: An optical system includes a light source, an interferometer, and a detector. The interferometer includes a scanner and a lens system disposed downstream of the scanner. The scanner is configured to direct a portion of the optical beam along one of a plurality of different directions within a scanning range. The lens system is configured to project the portion of optical beam to an imaging area defined by a field of view of the optical system, the lens system comprising a first lens, wherein an aspect of the first lens is adjustable so as to render the field of view adjustable without adjusting the scanning range of the scanner. The detector is configured to receive a reflected portion of the optical beam that reflects from an object placed within the imaging area.

Abstract: A LIDAR sensing system includes a light source that is controlled to project a collimated beam at various wavelengths. An interferometer receives the collimated beam and projects an object beam corresponding to the collimated beam at a diffraction grating. The object beam is diffracted from the diffraction grating at different angles corresponding to the wavelength of the collimated beam, creating a two dimensional scan along a first axis. The object beam is also controlled along a second axis that is perpendicular to the first axis. As a result, the LIDAR sensing system generates a horizontal and vertical scan (e.g., a three-dimensional scan) of the external environment.

Abstract: A LIDAR sensing system includes a light source that is controlled to project a collimated beam at various wavelengths. An interferometer receives the collimated beam and projects an object beam corresponding to the collimated beam at a diffraction grating. The object beam is diffracted from the diffraction grating at different angles corresponding to the wavelength of the collimated beam. As a result, the LIDAR sensing system generates a vertical scan (e.g., a two-dimensional scan) of the external environment. Various components of the LIDAR sensing system are then configured to rotate to produce multiple vertical scans, thus generating a three-dimensional scan.