Er:YAG Laser Device with Nano-Second Pulse Pumping
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Solution Overview
Problem
Current laser treatment apparatuses struggle to output lasers with a nano-second pulse width, particularly with Er:YAG lasers, due to medium characteristics, limiting precise treatment options.
Innovation Solution
A laser apparatus comprising a pumping laser supply unit emitting a nano-second pulse width pumping laser, which is absorbed by an Er:YAG output laser medium to generate an output laser with a different wavelength, utilizing a dye laser source and Nd:YAG oscillation unit to achieve the desired pulse width and wavelength, and incorporating total reflection and output mirrors for resonance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If a conventional laser medium (such as Er:YAG) is used, then the laser can operate at the desired wavelength, but it cannot generate a laser with a nano-second pulse width due to medium characteristics
Solution Approach 1:
The laser system is divided into two independent parts: a pumping laser source that generates nano-second pulses, and a laser medium (Er:YAG) that converts the pumping laser to the desired wavelength. This segmentation allows each component to be optimized independently - the pumping laser for pulse width control and the Er:YAG medium for wavelength generation.
Solution Approach 2:
The pumping laser acts as an intermediary between the power source and the Er:YAG laser medium. It transfers energy to the medium in nano-second pulses, enabling the medium to generate the desired output without being constrained by its own relaxation characteristics. The pumping laser mediates the energy transfer while maintaining pulse width control.
2Manufacturing precision
If a laser apparatus is designed to output a nano-second pulse width laser, then precise treatment is enabled, but the device complexity increases due to the need for specialized pumping sources and medium configuration
Solution Approach 1:
The pumping laser source is designed to serve multiple functions: it provides the nano-second pulse width, acts as the energy source for the Er:YAG medium, and can be adjusted to optimize different treatment conditions. This multi-functionality reduces the need for separate specialized components for each function.
Solution Approach 2:
The system allows independent adjustment of key parameters including pulse width, wavelength, and energy density. By enabling parameter optimization without changing the fundamental system architecture, the apparatus achieves high treatment precision while maintaining manageable complexity through flexible parameter control rather than structural complexity.
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 the configuration of a compact laser apparatus capable of outputting a nano-second pulse width laser, facilitating new treatment possibilities with Er:YAG lasers that were previously difficult to achieve, allowing for precise treatments with minimal thermal damage to tissues.
Implementation Method 1
an output laser medium absorbing the pumping laser and generating the output laser having a wavelength different from a wavelength of the pumping laser
Implementation Method 2
a total reflection mirror disposed on one side of the output laser medium, transmitting the pumping laser toward the output laser medium, and reflecting the output laser oscillated by the output laser medium
Implementation Method 3
a laser oscillation unit configured to emit an oscillation laser having a nano-second pulse width. The dye laser source may generate the pumping laser amplified by the oscillation laser emitted by the laser oscillation unit
Data Source
AI summary
A laser device according to the present invention may comprise: a pumping laser supply unit for emitting a pumping laser having a nano-second pulse width; and a laser output unit disposed at one side of the pumping laser supply unit and generating an output laser which is pumped by the pumping laser to have a nano-second pulse width corresponding to the pulse width of the pumping laser.