Optical Energy Pulse Shaping for Electromagnetic Cutting
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Solution Overview
Problem
Existing laser systems are not optimally suited for electromagnetically-induced mechanical cutting, as their output optical energy distributions are not effectively utilized when directed into atomized fluid particles for cutting mechanisms.
Innovation Solution
The output optical energy distributions feature high energy magnitudes at the beginning of each pulse with a steep slope (>5) and full-width half-max values between 0.025 and 150 microseconds, utilizing a flashlamp-driven laser system with a diode array for side-pumping an Erbium-based laser rod to generate laser light in the 1.73 to 2.94 micron range, suitable for cutting hard tissues like tooth or bone.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If prior art output optical energy distributions with gradually rising energy are used, then thermal cutting efficiency is improved, but electromagnetically-induced mechanical cutting effectiveness deteriorates
Solution Approach 1:
The patent changes the temporal parameters of the optical energy distribution by generating pulses with high initial energy magnitudes and steep leading edges (slope ≥ 5), rather than gradually rising energy profiles. This parameter change enables the optical energy to effectively interact with atomized fluid particles for mechanical cutting while maintaining thermal cutting capability
Solution Approach 2:
The patent employs periodic pulsed output optical energy distributions with full-width half-max values between 0.025 and 150 microseconds. These periodic pulses with specific temporal characteristics enable repeated mechanical cutting actions on the target surface, improving overall cutting effectiveness
2Loss of energy
If conventional pulse shapes with gradual energy rise are used, then laser system operational efficiency is improved, but cutting force generation for mechanical cutting deteriorates
Solution Approach 1:
The patent modifies the pulse shape parameters to achieve steep leading edges with slopes greater than or equal to 5. This rapid energy rise generates strong electromagnetic forces on atomized fluid particles, producing effective mechanical cutting forces while maintaining reasonable energy efficiency through optimized pulse duration
3Device complexity
If output optical energy is directed onto target surface for thermal cutting, then cutting mechanism simplicity is improved, but cutting precision and cleanliness deteriorate
Solution Approach 1:
The patent introduces atomized fluid particles as an intermediary medium between the optical energy source and the target surface. The optical energy interacts with these fluid particles to generate mechanical cutting forces, which then act on the target surface. This intermediary approach improves cutting precision and cleanliness while maintaining relative system simplicity
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
This configuration enables efficient and clean cutting by imparting mechanical forces to the target surface through high-intensity leading micropulses, optimizing the cutting effect with a consistent and powerful cut.
Implementation Method 1
a stimulation source for stimulating the laser rod to emit the coherent light
Implementation Method 2
The use of diodes for generating light amplification by stimulated emission
Implementation Method 3
The output optical energy interacts with the atomized fluid particles causing the atomized fluid particles to expand and impart electromagnetically-induced mechanical cutting forces onto the target surface
Data Source
AI summary
Output optical energy pulses including relatively high energy magnitudes at the beginning of each pulse are disclosed. As a result of the relatively high energy magnitudes which lead each pulse, the leading edge of each pulse includes a relatively large slope. This slope is preferably greater than or equal to 5. Additionally, the full-width half-max value of the output optical energy distributions are between 0.025 and 250 microseconds and, more preferably, are about 70 microseconds. A flashlamp is used to drive the laser system, and a current is used to drive the flashlamp. A flashlamp current generating circuit includes a solid core inductor which has an inductance of 50 microhenries and a capacitor which has a capacitance of 50 microfarads.