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US 12,754,206 B2Granted
AOM frequency shifter test fixture
AssigneeRosemount Aerospace Inc.
InventorGary E. Halama
Life of this patent
Estimating the term…
Abstract
A doppler lidar system includes an acousto-optic modulator. The acousto-optic modulator frequency shifts light to simulate a Doppler effect of a target without moving the target relative to a transceiver. A detector detects a frequency. One or more processors then calibrate the doppler lidar system based on the detected frequency. The acousto-optic modulator is then decoupled to return the doppler lidar system to a normal operating condition. The acousto-optic modulator is coupled in a transmit path or a receive path of the doppler lidar system.
Claims20
A doppler lidar system comprising:
- a doppler lidar unit comprising:
- a laser source that generates a narrowband output light;
- a detector;
- and
- one or more processors;
- an acousto-optic modulator coupled to the laser source;
- wherein the acousto-optic modulator generates a frequency-shifted light by frequency shifting the narrowband output light;
- and
- a first transceiver coupled to the acousto-optic modulator;
- wherein the first transceiver transmits the frequency-shifted light and receives a return light;
- wherein the frequency shifting of the narrowband output light by the acousto-optic modulator simulates a Doppler effect;
- wherein the detector is coupled to the first transceiver and receives the return light;
- wherein the detector detects a frequency of the return light;
- wherein the one or more processors are configured to execute program instructions causing the one or more processors to calibrate the doppler lidar system based on the frequency of the return light detected by the detector.
11 more elements
A doppler lidar system comprising:
- a doppler lidar unit comprising:
- a laser source that generates a narrowband output light;
- a detector;
- and
- one or more processors;
- a first transceiver coupled to the laser source;
- wherein the first transceiver transmits the narrowband output light and receives a return light;
- and
- an acousto-optic modulator coupled to the first transceiver;
- wherein the acousto-optic modulator generates a frequency-shifted return light by frequency shifting the return light;
- wherein the frequency shifting of the return light by the acousto-optic modulator simulates a Doppler effect;
- wherein the detector is coupled to the first transceiver and receives the frequency-shifted return light;
- wherein the detector detects a frequency of the frequency-shifted return light;
- wherein the one or more processors are configured to execute program instructions causing the one or more processors to calibrate the doppler lidar system based on the frequency of the frequency-shifted return light detected by the detector.
11 more elements
Dependencies are inferred from the claim text.