Laser Pulse Dispersion Control Under Ambient Variations
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Solution Overview
Problem
Existing pulse modification devices for laser pulses, particularly those involving pulse stretching and compression, are complex and expensive, and their performance is adversely affected by ambient parameters such as temperature and pressure, leading to unwanted changes in pulse duration.
Innovation Solution
A pulse modification apparatus that includes actuating devices to set dispersion based on ambient parameter measurements, using sensors and controllers to maintain consistent pulse properties by compensating for changes in ambient conditions, such as refractive index alterations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If pulse stretching and compression devices are used to modify laser pulses, then pulse properties can be controlled, but the devices become complex and expensive
Solution Approach 1:
The patent applies parameter changes by using ambient sensors to detect environmental parameters (temperature, pressure, humidity) and dynamically adjusting the dispersion of pulse stretching/compression devices to compensate for ambient-induced variations. This maintains pulse property control while avoiding overly complex active control systems by leveraging environmental parameter monitoring.
2Manufacturing precision
If pulse stretching and compression devices are used to modify laser pulses, then pulse properties can be controlled, but the devices become expensive
Solution Approach 1:
The patent reduces manufacturing costs by implementing a control system that monitors ambient parameters and automatically adjusts device settings to compensate for environmental effects. This approach maintains pulse property control without requiring expensive high-precision passive components, as the system adapts to environmental variations through parameter changes rather than relying on costly manufacturing tolerances.
3Stability of the object's composition
If ambient parameters change, then pulse properties remain stable, but dispersion of pulse stretching/compression devices changes
Solution Approach 1:
The patent implements feedback control by using ambient sensors to continuously monitor environmental parameters and feeding this information to a controller that adjusts the dispersion of pulse stretching/compression devices. This closed-loop system compensates for ambient-induced dispersion changes, maintaining both pulse property stability and effective dispersion control despite environmental variations.
Solution Approach 2:
The patent addresses dispersion stability by dynamically changing the operational parameters of pulse stretching/compression devices based on ambient conditions. The controller adjusts device parameters (such as grating angles or fiber Bragg grating temperatures) to compensate for environmental effects, maintaining reliable dispersion control despite ambient parameter changes.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Ensures constant pulse properties despite variations in ambient parameters, simplifying the setup and reducing costs by maintaining pulse duration and intensity stability.
Implementation Method 1
at least one pulse stretcher for dispersive stretching of laser pulses
Implementation Method 2
at least one pulse compressor for dispersive compression of the laser pulses
Data Source
AI summary
A pulse modification apparatus includes at least one pulse stretcher for dispersive stretching of laser pulses and/or at least one pulse compressor for dispersive compression of the laser pulses, an actuator for setting a dispersion of the at least one pulse stretcher or a dispersion of the at least one pulse compressor by setting at least one manipulated variable, a controller for controlling the actuator based on a measurement signal, and an ambient sensor for detecting at least one ambient parameter as the measurement signal. The dispersion of the at least one pulse stretcher or the dispersion of the at least one pulse compressor is dependent on the at least one ambient parameter.