Innovusion, Inc.

A light detection and ranging (LiDAR) system in which multiple pump lasers are operated in polyphase fashion at a single pumping stage is disclosed. In some embodiments, the multiple pump lasers are operated by controllers that generate current pulses through the multiple pump lasers. The current pulses powering at least two of the pumping lasers have different phases. In some embodiments, the phase differences are such that there is no timing overlap in the current pulses through the pump lasers. In some embodiments, the phase difference between successive current pulses is greater than the pulse width such that the sum of the duty cycles of all the current pulses is less than one. In some embodiments, junction temperatures of pump lasers are monitored and temperature information from the monitoring is used to dynamically select which pump laser will be utilized at a given time. Further details of these and other embodiments are disclosed herein.

A LiDAR system is provided. The LiDAR system comprises a plurality of transmitter channels and a plurality of receiver channels. The plurality of transmitter channels are configured to transmit a plurality of transmission light beams to a field-of-view at a plurality of different transmission angles, which are then scanned to cover the entire field-of-view. The LiDAR system further comprises a collection lens disposed to receive and redirect return light obtained based on the plurality of transmission light beams illuminating one or more objects within the field-of-view. The LiDAR system further comprises a plurality of receiver channels optically coupled to the collection lens. Each of the receiver channels is optically aligned based on a transmission angle of a corresponding transmission light beam. The LiDAR system further comprises a plurality of detector assemblies optically coupled to the plurality of receiver channels.

Embodiments discussed herein refer to LiDAR systems and methods that tune one or more filters to mitigate background interference. The one or more filters can be tuned to compensate for laser drift such that the narrowest possible bandpass filter can be used, thereby increasing the rejection of background interference.

A LiDAR system is provided. The LiDAR system comprises a plurality of transmitter channels and a plurality of receiver channels. The plurality of transmitter channels are configured to transmit a plurality of transmission light beams to a field-of-view at a plurality of different transmission angles, which are then scanned to cover the entire field-of-view. The LiDAR system further comprises a collection lens disposed to receive and redirect return light obtained based on the plurality of transmission light beams illuminating one or more objects within the field-of-view. The LiDAR system further comprises a plurality of receiver channels optically coupled to the collection lens. Each of the receiver channels is optically aligned based on a transmission angle of a corresponding transmission light beam. The LiDAR system further comprises a plurality of detector assemblies optically coupled to the plurality of receiver channels.

Embodiments discussed herein refer to LiDAR systems and methods that enable substantially instantaneous power and frequency control over fiber lasers. The systems and methods can simultaneously control seed laser power and frequency and pump power and frequency to maintain relative constant ratios among each other to maintain a relatively constant excited state ion density of the fiber laser over time.

A multiple stage optical amplification device in a light detection and ranging (LiDAR) scanning system is provided. The system comprises a first power amplification stage receiving seed laser light and outputting first amplified laser light; a second power amplification stage receiving the first amplified laser light and outputting a second amplified laser light; and a single optical power pump coupled to the second power amplification stage. The second power amplification stage is configured to amplify the first amplified laser light to generate the second amplified laser light. A first portion of pump power provided by the optical power pump is deliverable to the first power amplification stage to amplify the seed laser light.

A LiDAR system is provided. The LiDAR system comprises a plurality of transmitter channels and a plurality of receiver channels. The plurality of transmitter channels are configured to transmit a plurality of transmission light beams to a field-of-view at a plurality of different transmission angles, which are then scanned to cover the entire field-of-view. The LiDAR system further comprises a collection lens disposed to receive and redirect return light obtained based on the plurality of transmission light beams illuminating one or more objects within the field-of-view. The LiDAR system further comprises a plurality of receiver channels optically coupled to the collection lens. Each of the receiver channels is optically aligned based on a transmission angle of a corresponding transmission light beam. The LiDAR system further comprises a plurality of detector assemblies optically coupled to the plurality of receiver channels.

Embodiments discussed herein refer to LiDAR systems and methods that enable substantially instantaneous power and frequency control over fiber lasers. The systems and methods can simultaneously control seed laser power and frequency and pump power and frequency to maintain relative constant ratios among each other to maintain a relatively constant excited state ion density of the fiber laser over time.