Diode Laser Pulse Tuning for Multi-Wavelength Skin Treatment
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Solution Overview
Problem
Existing laser devices for skin treatment require expensive and complex equipment to adjust the wavelength and duration of the laser pulse, limiting their versatility and cost-effectiveness.
Innovation Solution
A laser device with a diode laser generating unit that can vary the wavelength and duration of the pulse using a simple and cost-effective method, involving adjustments to the operating temperature and current applied to the diode laser, and a laser amplifying unit for amplifying the pulses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If expensive wavelength conversion devices are used to generate lasers with various wavelengths, then the wavelength variety is improved, but the device cost increases
Solution Approach 1:
The patent changes the operating parameters (temperature and current) of a single diode laser to vary its output wavelength. By controlling the temperature through a temperature control unit and adjusting the current through a current control unit, the laser can operate at different wavelengths without requiring expensive wavelength conversion devices, thus resolving the contradiction between wavelength variety and device cost
Solution Approach 2:
The patent makes a single diode laser perform multiple functions by enabling it to operate at various wavelengths through parameter adjustment. The same laser device can treat different skin conditions requiring different wavelengths, eliminating the need for multiple specialized laser devices or expensive wavelength conversion equipment
2Ease of operation
If expensive or complex equipment is used to vary the duration of the pulse, the pulse duration control is improved, but the device complexity increases
Solution Approach 1:
The patent varies the pulse duration by changing the operating current and temperature parameters of the diode laser. The control unit adjusts these parameters to achieve different pulse widths (e.g., 100 microseconds to 10 milliseconds) without requiring complex external pulse generation equipment, thereby simplifying the overall device while maintaining precise pulse duration control
Solution Approach 2:
The diode laser itself is used to generate the pulsed output with variable duration through internal parameter control, rather than requiring a separate complex pulse generation system. The laser device serves its own pulse generation needs by modulating its operating conditions, reducing the need for additional complex equipment
3Adaptability or versatility
If multiple diode lasers are used to output laser pulses of different wavelengths, then the wavelength variety is improved, but the device complexity increases
Solution Approach 1:
Instead of using multiple physical diode lasers, the patent employs a single diode laser whose wavelength is varied by changing its operating temperature and current parameters. This approach achieves wavelength diversity (e.g., 800nm to 1060nm range) while maintaining a simple single-laser device structure, avoiding the complexity of multiple laser sources and their associated control systems
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 allows for convenient adjustment of laser wavelengths and pulse durations without the need for expensive equipment, enhancing its applicability and reducing manufacturing costs while maintaining a simple and reliable structure.
Implementation Method 1
a diode laser generating unit configured to vary at least one of a wavelength of a laser and duration of a pulse to generate a diode laser pulse
Implementation Method 2
a laser amplifying unit configured to amplify the diode laser pulse transmitted from the diode laser generating unit
Data Source
AI summary
A laser device for skin treatment, includes: a laser generating unit including one or a plurality of diode lasers configured to generate a diode laser pulse, one or a plurality of diode laser drivers each arranged to correspond to the diode laser and configured to vary diode laser pulses generated from the diode laser into pulses having different durations, a laser amplifying unit configured to amplify the pulse transmitted from the diode laser generating unit, and a controller configured to control the diode laser generating unit and the laser amplifying unit to control a wavelength and intensity of a laser output from the laser amplifying unit.