Dynamic Driver Control Signal for Laser Pulse Energy Consistency
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Solution Overview
Problem
Laser systems with excitation lasers and optical amplifiers often produce pulses with varying energy levels despite identical driver control signals due to varying time intervals between actuation times, affecting the gain level of the optical amplifier.
Innovation Solution
Generating a driver control signal that takes into account the time interval between actuation times to adjust the excitation laser control, using a compensation signal to ensure consistent pulse energy output by adapting the power of the excitation laser based on the spacing of actuation times and the state of the optical amplifier.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the excitation laser is controlled by a driver with identical control signals, then the control simplicity is maintained, but the pulse energy varies due to varying time intervals between actuation times
Solution Approach 1:
The driver control signal is made dynamic by adapting its parameters based on the time interval between actuation times. The control signal adjusts the power of the excitation laser dynamically according to the pumping time, transforming a static control approach into a dynamic one that responds to varying operational conditions.
Solution Approach 2:
The invention changes the parameters of the driver control signal based on the time interval between actuation times. By modifying control signal parameters (such as amplitude or duration) according to the pumping time, the system compensates for gain level variations in the optical amplifier and maintains consistent pulse energy.
2Adaptability or versatility
If the time interval between actuation times varies, then the adaptability to different operating conditions is improved, but the pulse energy consistency deteriorates due to varying gain levels in the optical amplifier
Solution Approach 1:
The system implements a feedback mechanism where the time interval between actuation times is measured and used to adjust the driver control signal. This feedback loop allows the system to adapt to varying operating conditions while maintaining pulse energy consistency by compensating for gain level changes in the optical amplifier.
Solution Approach 2:
The driver control signal is adjusted in advance based on the expected time interval between actuation times. By preliminarily adapting the control signal parameters before the laser pulse is generated, the system prepares for varying operating conditions and ensures consistent pulse energy output.
3Adaptability or versatility
If the pumping time between pulses varies, then the flexibility in pulse timing is improved, but the energy extraction from the optical amplifier varies, causing different power levels
Solution Approach 1:
The driver control signal parameters are changed based on the pumping time between pulses. By adjusting control signal parameters according to the time interval, the system compensates for varying energy extraction from the optical amplifier, maintaining consistent power levels despite flexible pulse timing.
Solution Approach 2:
The control system dynamically adjusts the driver control signal based on the actual pumping time between pulses. This dynamic adaptation allows the system to maintain power level consistency while accommodating flexible pulse timing requirements.
Data Source
AI summary
In methods and devices for generating a laser pulse of an excitation laser that is actuated by a driver in response to a triggering time of a trigger signal, the driver actuation signal is generated taking into account the time interval between the triggering time and a preceding triggering time.