Annular Optical Cavity Pulse Train Generator
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Solution Overview
Problem
Conventional picosecond laser systems with pulse trains have unadjustable time intervals, leading to suboptimal drilling depth and surface processing quality due to limitations in material processing parameters, and are structurally complex and costly.
Innovation Solution
An apparatus with an annular optical cavity structure, comprising an optical coupler, combiner, gain fiber, optical path time regulator, and beam splitter, allows for adjustable time intervals in pulse trains, enhancing processing flexibility and quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional mechanism is used to generate picosecond laser with pulse train, then the laser can process materials, but the structure becomes complex and costly while the time interval remains unadjustable
Solution Approach 1:
The patent implements dynamic adjustability of the pulse train time interval by making the optical path length adjustable. The optical path time regulator allows the time interval between pulses to be dynamically changed while maintaining a simplified annular optical cavity structure, thus achieving adaptability without increasing device complexity
Solution Approach 2:
The patent changes the physical parameter of optical path length to achieve time interval adjustment. By regulating the optical path time through modifying the physical configuration of the optical cavity, the system achieves parameter adjustability while avoiding complex mechanical or electronic control mechanisms
2Object-affected harmful factors
If the time interval of pulse train is too long, then plasma shielding effects are avoided, but the cutting amount decreases due to material cooling
Solution Approach 1:
The patent uses dynamic adjustment of the time interval parameter to adapt to different processing conditions. By making the time interval可调, the system can optimize the balance between avoiding plasma shielding and maintaining sufficient cutting amount through real-time parameter optimization
Solution Approach 2:
The patent optimizes the time interval parameter within a specific range to achieve the desired balance. By changing the optical path length parameter, the system adjusts the time interval to prevent plasma shielding while maintaining adequate cutting efficiency through parameter optimization
3Productivity
If the time interval of pulse train is too short, then processing speed increases, but plasma shielding effects block subsequent laser pulses
Solution Approach 1:
The patent implements dynamic control of the time interval to prevent plasma shielding while maintaining high processing speed. The adjustable optical path time regulator allows real-time optimization of the pulse interval to ensure it remains above the plasma shielding threshold while minimizing the interval for maximum productivity
Solution Approach 2:
The patent optimizes the time interval parameter to the minimum value that avoids plasma shielding. By adjusting the optical path length to achieve the optimal time interval, the system maximizes processing speed while preventing harmful plasma effects through parameter optimization
4Device complexity
If a picosecond laser with single pulse is used, then the structure is simple, but the drilling depth is limited compared to pulse train
Solution Approach 1:
The patent employs periodic action by using a pulse train instead of a single pulse. The annular optical cavity naturally generates periodic pulse trains, and by adjusting the optical path length, the system achieves variable period pulse delivery that increases drilling depth while maintaining structural simplicity
Solution Approach 2:
The patent achieves continuity of useful action through the pulse train mechanism. Multiple pulses delivered in sequence within the annular cavity continue the drilling action without interruption, accumulating energy deposition over time to achieve greater drilling depth while keeping the overall structure simple
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 apparatus generates pulse trains with adjustable time intervals, achieving greater drilling depth and superior surface processing quality without burrs, while improving processing speed and flexibility for various materials.
Implementation Method 1
at least one gain fiber, being a gain medium, located on the annular optical cavity structure, having at least one input end connected to an output end of the optical combiner as a sixth end, for amplifying a pulse train optical signal cycling within the annular optical cavity structure
Data Source
AI summary
An apparatus for generating a pulse train with an adjustable time interval is provided. The apparatus, being an annular optical cavity structure, includes a seed source receiving end, a pump source receiving end, an optical coupler, an optical combiner, a gain fiber, an optical path time regulator and a beam splitter. Thus, the apparatus is capable of generating a pulse train with an adjustable time interval to increase material processing quality and speed.