Lasers à fibre are highly efficient, precise tools used across various industries for tasks like cutting, gravure, et marquage. Understanding how they work requires exploring their history, components, and the science behind laser technology.
What Are Fiber Lasers?
Lasers à fibre are a specific type of laser where the active medium that generates the laser beam is an optical fiber. These fibers are doped with rare earth elements like erbium, ytterbium, or neodymium, which allow the fiber to amplify the light inside. Unlike CO2 lasers that use gas, fiber lasers rely on these elements to enhance and guide light into a fine, concentrated beam.
When Was the Fiber Laser Invented? The History of LASERS
The foundation of laser à fibre technology dates back to the early 1960s with the invention of the laser itself. Le terme “LASER” stands for Light Amplification by Stimulated Emission of Radiation, a concept first demonstrated by Theodore Maiman in 1960. While early lasers were primarily gas-based (like CO2 lasers), technologie laser à fibre was introduced later, around the 1980s, as advancements in optical fibers and rare-earth doping emerged. Fiber lasers quickly gained popularity for their high efficiency and low maintenance.
How a Laser Works
A laser works by amplifying light and emitting it as a coherent, highly concentrated beam. It starts with a photon that excites atoms in the gain medium (in the case of fiber lasers, the optical fiber doped with rare earth elements). As these atoms return to their ground state, they release photons, which in turn stimulate more photons, creating a cascade effect that amplifies light.
The Importance of Refraction
Refraction is crucial in laser technology as it helps guide the light within the optical fiber. The optical fiber’s core, with a higher refractive index than the cladding, traps light and forces it to propagate along the fiber’s length, even around bends. This total internal reflection ensures that the light remains confined until it exits as a powerful, focused beam.
How Is Light Amplified?
Light amplification in fiber lasers happens when energy is introduced into the fiber through a pump diode. This energy excites the rare-earth atoms, causing them to release photons. These photons travel through the fiber core, stimulating other atoms to release even more photons in a chain reaction, ultimately producing a highly amplified and coherent laser beam.
How Is Light Turned Into a Focused Beam?
After amplification, the laser beam is collimated and focused using lentilles. A collimator ensures the light travels in a parallel direction, while a focusing lens brings the laser beam to a tight focal point. This concentrated energy allows the fiber laser to cut, graver, or mark materials with incredible precision, especially metals like stainless steel or aluminum.
What Are the Types of Fiber Lasers?
Fiber lasers come in various types, each suited for different applications:
- Continuous Wave (CW) Lasers à fibre: Emit a continuous beam of laser light, ideal for cutting or welding.
- Pulsed Fiber Lasers: Emit laser pulses at set intervals, perfect for precision tasks like marking or engraving.
- MOPA (Amplificateur de puissance à oscillateur maître) Lasers à fibre: These offer more control over pulse durations and frequency, enabling detailed engraving on reflective materials like metals.
What’s the Difference Between Fiber Lasers and CO2 Lasers?
Fiber lasers and CO2 lasers differ significantly in terms of their operational mechanisms and applications. Lasers CO2 use gas (carbon dioxide) as the laser medium, making them excellent for cutting non-metals like wood, acrylique, ou des plastiques. Cependant, they struggle with metals. Lasers à fibre, d'autre part, are better suited for metal applications due to their shorter wavelength (~1.06 µm), which is more effectively absorbed by metal surfaces. En plus, fiber lasers tend to have higher energy efficiency and lower maintenance requirements compared to CO2 lasers.
What is a Fiber Laser Engraver?
UN graveur laser à fibre is a specialized machine that uses fiber laser technology to mark or engrave various materials, en particulier les métaux. Its precision makes it ideal for intricate designs, Numéros de série, codes à barres, and logos on items like jewelry, outils, and industrial components. Contrairement aux méthodes de gravure traditionnelles, un graveur laser à fibre uses a non-contact approach, minimizing wear and tear while ensuring detailed, permanent engravings.
How Long Does a Fiber Laser Last?
One of the significant advantages of fiber lasers is their long operational life. En moyenne, a fiber laser can last 50,000 à 100,000 heures before any major components need replacement. This longevity makes fiber lasers highly reliable and cost-effective over time, especially compared to other laser types that may require more frequent maintenance.
What Are the Components of a Fiber Laser?
A typical fiber laser consists of the following key components:
- Pump Diode: Supplies the energy that excites the atoms in the optical fiber.
- Optical Fiber: Doped with rare-earth elements like ytterbium or erbium, this fiber amplifies the light.
- Resonator: Mirrors that reflect the light back and forth, increasing its intensity.
- Collimator/Focusing Lens: Used to direct and focus the laser beam onto the workpiece.
- Cooling System: Essential for managing the heat generated during laser operation, ensuring the system runs efficiently.
What Are the Laser Parameters?
The performance of a fiber laser can be adjusted by modifying various parameters, y compris:
- Puissance de sortie: Measured in watts, determines how much energy the laser emits.
- Durée de pouls: In pulsed lasers, this refers to how long each laser pulse lasts.
- Fréquence: The number of laser pulses emitted per second.
- Qualité du faisceau (M² factor): Determines the focusability of the laser beam, which directly impacts the precision of the engraving or cutting process.
How Much Does a Fiber Laser Marking Machine Cost?
The price of a machine de marquage laser à fibre varies depending on the power, caractéristiques, et la marque. Par exemple, le ComMarker B4 graveur laser à fibre is available in different models, with prices typically ranging from $1,000 à $8,000 depending on the wattage and additional accessories. Le B4-60W model offers higher power and precision for cutting thicker metals, tandis que le B4-20W model is a more affordable option for detailed engraving tasks.
Machine de gravure laser à fibre B4 20W JPT MOPA
Portable & Abordable: Machine de gravure laser à fibre B4 MOPA 20W, pesant 18 kg avec des dimensions compactes. Levage électrique: Moteur intégré pour une mise au point précise. Gravure polyvalente: Couleurs sur acier inoxydable, noir et blanc sur aluminium, plus gravure 3D et profonde sur métal et roche. Espace de travail spacieux: Double lentille (110millimètre, 200millimètre) avec calibrage précis du point rouge. Amélioré…
Where to Buy a Fiber Laser Marker Machine?
If you’re looking to purchase a reliable machine de marquage laser à fibre, ComMarker B4 offers high-performance options suited for both small businesses and industrial use. You can buy the ComMarker B4 series directly from the official ComMarker website, where you can explore different models like the B4-60W and B4-20W. These machines are also available on e-commerce platforms or through authorized distributors.
