Laser array with precise frequency modulation
AssigneeLyte Ai, Inc.
InventorsAdam Scofield, Arman Hajati, Alexander Shpunt
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Abstract
An optoelectronic device (20, 80, 90, 108) includes an array (21) of lasers (22, 24, 26, 28), which are configured to output respective beams. One or more modulators (32, 82) apply frequency modulations to the beams. A single reference interferometer (38, 94) measures a deviation in a respective frequency modulation of at least one of the beams. Correction circuitry (48, 88) applies a feedback correction signal to the modulators to adjust the modulations responsively to the deviation measured by the single reference interferometer.
Claims22
An optoelectronic device, comprising:
- an array of lasers, which are configured to output respective beams;
- one or more modulators, which are coupled to apply frequency modulations to the beams;
- a single reference interferometer, which is configured to measure a deviation in a respective frequency modulation of at least one of the beams;
- and
- correction circuitry, which is coupled to apply a feedback correction signal to the modulators to adjust the modulations responsively to the deviation measured by the single reference interferometer.
A method for frequency control, comprising:
- providing an array of lasers, which are configured to output respective beams, and one or more modulators, which are coupled to apply frequency modulations to the beams;
- coupling the array of lasers to a single reference interferometer so that the interferometer measures a deviation in a respective frequency modulation of at least one of the beams;
- and
- applying a feedback correction signal to the modulators to adjust the modulations responsively to the deviation measured by the single reference interferometer.
15-26. (canceled)
An optoelectronic device, comprising:
- an array of lasers, which are configured to output respective beams;
- one or more modulators, which are coupled to apply frequency modulations to the beams;
- one or more reference interferometers, which together comprise a single signal arm and which are configured to measure deviations in respective frequency modulations of one or more of the beams;
- and
- correction circuitry, which is coupled to apply feedback correction signals to the modulators to adjust the modulations responsively to the deviations measured by the one or more reference interferometers.
33-42. (canceled)
Dependencies are inferred from the claim text.