Skin Treatment Laser Pulse Control With Multi-Pass Amplification
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Solution Overview
Problem
Laser generating devices and amplifying devices face complexity issues in producing various types of pulse waves, leading to decreased output when their structures are simplified.
Innovation Solution
A laser device for skin treatment featuring a diode laser with a dedicated driver for pulse width adjustment and a laser amplifying unit with multiple amplification mediums and mirrors to amplify pulses, allowing for flexible pulse width adjustment and amplification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the structure of laser generating devices and amplifying devices is simplified to reduce complexity, then device complexity decreases, but output decreases
Solution Approach 1:
The device is divided into a laser generating unit and a laser amplifying unit, each with specific functions. The generating unit creates pulses with adjustable widths using a diode laser and dedicated driver, while the amplifying unit boosts the pulse energy through multiple amplification mediums. This segmentation allows each unit to be optimized independently, maintaining high output while managing complexity.
Solution Approach 2:
The patent implements dynamic pulse width adjustment capability in the laser generating unit, allowing the pulse width to be varied from 100 picoseconds to 2000 picoseconds. This dynamic adjustment is achieved through a dedicated driver with fast rising time (100 ps or less) and a pulse width adjustment unit, enabling the system to adapt to different application requirements without requiring complete structural redesign.
2Adaptability or versatility
If various types of pulse waves are generated to increase versatility, then adaptability improves, but device complexity increases
Solution Approach 1:
The laser generating unit is designed with universal functionality to generate multiple types of pulse waves (single pulses, multiple pulses, and continuous waves) using a single diode laser source. The dedicated driver and pulse width adjustment unit enable this multi-functionality without requiring separate laser sources for each pulse type, thus improving versatility while controlling complexity.
Solution Approach 2:
The system achieves various pulse wave types by changing key parameters such as pulse width (100-2000 ps), pulse repetition frequency, and pulse energy through the dedicated driver and pulse width adjustment unit. This parameter-based control allows flexible generation of different pulse configurations without adding complex structural elements.
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
Enables convenient adjustment and amplification of pulse widths, facilitating the generation of various pulse waves with easy operation and continuous or discontinuous output for skin treatment.
Implementation Method 1
an amplification medium for absorbing light energy from the pumping lamp
Data Source
AI summary
A laser device for skin treatment includes: a laser generating unit including a diode laser for generating a pulse capable of being varied to a pulse width of 100 picoseconds (ps) to 2000 ps by a dedicated driver having a rising time of 100 ps or less and a pulse width adjustment unit for adjusting a width of the pulse generated by the diode laser, the laser generating unit configured to generate a single or a plurality of pulses; and a laser amplifying unit including a pumping lamp and a single or a plurality of amplification mediums having a rod structure for absorbing light energy from the pumping lamp, wherein, in the laser amplifying unit, a pulse supplied from the laser generating unit passes through at least one of the single or a plurality of amplification mediums a plurality of times inward from the outside and is gradually amplified.