Multi-Crystal Pulse Shaping for Low-Fluctuation Pulsed Lasers
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Solution Overview
Problem
Conventional pulse shaping techniques using one or two non-linear optical crystals result in significant energy fluctuations in pulsed lasers, which can lead to instability in ion acceleration processes.
Innovation Solution
A pulse shaping device comprising a non-linear optical crystal group with at least three crystals arranged side by side on the optical path of the input pulsed laser, optimized for energy conversion efficiency and fluctuation reduction through precise adjustment of distances and rotation angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If one or two non-linear optical crystals are used for pulse shaping, then the device complexity is reduced, but the energy fluctuation increases significantly
Solution Approach 1:
The patent divides the pulse shaping function into multiple independent non-linear optical crystals (at least three crystals arranged in sequence). Each crystal contributes to the overall pulse shaping process, distributing the functional load and reducing energy fluctuation through cumulative effect. This segmentation allows the system to achieve better energy stability without requiring a single complex crystal.
2Reliability
If more non-linear optical crystals are arranged in sequence, then the energy fluctuation is reduced, but the device complexity increases
Solution Approach 1:
The patent optimizes specific parameters of the multi-crystal system including the thickness of each non-linear optical crystal, the distance between adjacent crystals, and the polarization angle of each crystal. By carefully adjusting these parameters, the system achieves minimal energy fluctuation while maintaining a manageable device complexity. The optimized configuration ensures that each crystal contributes effectively to pulse shaping without requiring excessive numbers of components.
3Use of energy by moving object
If the distance and rotation angles are precisely adjusted, then the energy conversion efficiency is improved, but the ease of operation decreases
Solution Approach 1:
The patent provides pre-calculated optimal values for the distance between crystals and rotation angles based on theoretical modeling and simulations. These preliminary optimized parameters allow operators to achieve high energy conversion efficiency without requiring extensive trial-and-adjustment procedures. The pre-determined configuration serves as a starting point that significantly reduces the operational complexity while maintaining peak performance.
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
The device achieves a pulsed laser output with reduced energy fluctuations, enhancing stability and efficiency in applications such as ion acceleration and medical accelerators.
Implementation Method 1
a non-linear optical crystal group including at least three non-linear optical crystals arranged side by side on an optical path of an input pulsed laser
Data Source
AI summary
This invention provides a pulse shaping technique that can yield a pulsed laser having a smaller energy fluctuation than that of a conventional pulse shaping technique using one or two non-linear optical crystals. A pulse shaping device includes: a non-linear optical crystal group including at least three non-linear optical crystals arranged side by side on an optical path of an input pulsed laser.