Laser Oscillator Prism Wavelength Coupling
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Solution Overview
Problem
The existing laser oscillator systems face reduced output power due to varying beam diameters and divergence angles of laser beams after passing through wavelength dispersive elements, leading to degraded light-harvesting efficiency.
Innovation Solution
Incorporating a partially reflective element and a prism with apex-angled surfaces within the external resonator to perform wavelength coupling, ensuring that laser beams from different media are superimposed with consistent beam diameters and divergence angles, thereby improving light-harvesting efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If wavelength dispersive elements are used to perform wavelength coupling on laser beams from multiple laser media, then the laser beams can be superimposed to form one laser beam, but the beam diameters and divergence angles of the laser beams differ depending on the laser medium, leading to degraded light-harvesting and reduced output power
Solution Approach 1:
A beam diameter adjustment element (such as a cylindrical lens or toroidal lens) is introduced as an intermediary component between the wavelength dispersive element and the laser media. This intermediary element adjusts the beam diameters of laser beams from different laser media to be substantially equal before they enter the wavelength dispersive element, thereby ensuring uniform beam parameters after wavelength coupling and improving both light-harvesting efficiency and output power
Solution Approach 2:
The invention changes the beam diameter parameter of laser beams by introducing a beam diameter adjustment element. This element modifies the beam diameter of each laser beam individually so that all beams have substantially equal diameters before wavelength coupling, resolving the parameter mismatch that causes degraded light-harvesting while maintaining the wavelength coupling function
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 solution enhances the light-harvesting efficiency of laser beams output from the external resonator by maintaining consistent beam diameters and divergence angles, thereby increasing the intensity and quality of the laser output.
Implementation Method 1
a wavelength dispersive element to perform wavelength coupling on the laser beams having different wavelengths emitted from the laser media so as to superimpose the laser beams into one laser beam
Implementation Method 2
a prism that is placed between the laser media and the wavelength dispersive element and that superimposes the laser beams into one laser beam on the wavelength dispersive element, the prism including two surfaces forming an apex angle
Implementation Method 3
a partially reflective element to transmit part of the laser beams and reflect and return a remainder toward the laser media
Data Source
AI summary
A laser oscillator includes: an external resonator configured to include laser media to emit laser beams having different wavelengths; and a partially reflective mirror to transmit part of the laser beams and reflect and return a remainder toward the laser media. The external resonator includes therein: a diffraction grating to perform wavelength coupling on the laser beams having different wavelengths emitted from the laser media so as to superimpose the laser beams into one laser beam and to emit, to the partially reflective mirror, the one laser beam; and a prism that is placed between the laser media and the diffraction grating and that superimposes the laser beams into one laser beam on the diffraction grating, the prism including two surfaces forming an apex angle, one of the two surfaces being an incident surface and another of the two surfaces being an exit surface.