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US 11,336,071 B2Granted
Degradation detection for a pulsed laser
AssigneeLumentum Operations LLC
InventorsTobyn VanVeghten, Joseph J. Alonis, James J. Morehead, Loren A. Eyres
Life of this patent
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Abstract
A device may determine at least one metric related to a plurality of laser pulses associated with a Q-switched laser. The device may determine a statistical metric for the at least one metric related to the plurality of laser pulses. The device may determine that the statistical metric satisfies a threshold level of deviation of the at least one metric related to the plurality of laser pulses from a baseline value for the at least one metric. The device may indicate laser degradation of the Q-switched laser based on determining that the statistical metric satisfies the threshold.
Claims17
A device, comprising:
- one or more memories;
- and
- one or more processors, communicatively coupled to the one or more memories, to:
- determine a set of build-up time metrics for a set of laser pulses of a Q-switched laser,
- wherein the build-up time metrics correspond to a build-up time that is defined, for a corresponding laser pulse, as a time from the Q-switched laser releasing stored energy to cause the corresponding laser pulse to when the corresponding laser pulse satisfies a threshold intensity;
- determine, based on the set of build-up time metrics, a condition for the Q-switched laser,
- wherein the one or more processors, when determining the condition, are to:
- compare a first subset of the set of build-up time metrics associated with even laser pulses of the set of laser pulses to a second subset of the set of build-up time metrics associated with odd laser pulses of the set of laser pulses;
- determine, based on comparing the first subset to the second subset, that a threshold is satisfied between the first subset and the second subset;
- and
- determine the condition based on determining that the threshold is satisfied;
- and
- indicate the condition for the Q-switched laser.
10 more elements
A method, comprising:
- determining, by a device, at least one metric related to a plurality of laser pulses associated with a Q-switched laser, the at least one metric including:
- a build-up time metric,
- wherein the build-up time metric corresponds to a build-up time that is defined, for a corresponding laser pulse, as a time from the Q-switched laser releasing stored energy to cause the corresponding laser pulse to when the corresponding laser pulse satisfies a threshold intensity;
- dividing, by the device, the plurality of laser pulses into a first subset of pulses and a second subset of pulses,
- wherein the first subset of pulses are even laser pulses and the second subset of pulses are odd laser pulses;
- determining, by the device, a statistical metric for the build-up time metric related to the plurality of laser pulses,
- wherein determining the statistical metric comprises:
- determining the statistical metric for the first subset of pulses and for the second subset of pulses;
- determining, by the device, that the statistical metric satisfies a threshold level of deviation of the build-up time metric related to the plurality of laser pulses from a baseline value for the build-up time metric;
- and
- indicating, by the device, laser degradation of the Q-switched laser based on determining that the statistical metric satisfies the threshold level of deviation.
8 more elements
A system, comprising:
- at least one measurement device to measure a build-up time associated with a plurality of laser pulses of a Q-switched laser,
- wherein the build-up time is defined for a corresponding laser pulse as a time from the Q-switched laser releasing stored energy to cause the corresponding laser pulse to when the corresponding laser pulse satisfies a threshold intensity;
- a controller to divide the plurality of laser pulses into a first subset of pulses and a second subset of pulses,
- wherein the first subset of pulses are even laser pulses and the second subset of pulses are odd laser pulses;
- the controller to determine, for the first subset of pulses and for the second subset of pulses, a statistical metric for the build-up time;
- and
- the controller to predict an error associated with the Q-switched laser based on the statistical metric indicating a threshold deviation of the build-up time relative to a baseline value for the build-up time.
4 more elements
Dependencies are inferred from the claim text.