Build a Home Laser Engraver for Aluminum w/ LasersTEA

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    Fibre Laser
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SUMMARY

This discussion focuses on building a homemade fiber laser for engraving aluminum, highlighting the challenges and components involved. The LasersTEA project is referenced as a prototype that utilizes nitrogen and helium gases for engraving, but it is noted that fiber lasers are superior for metal engraving. Key components for constructing a fiber laser include ytterbium-doped fibers and a diode laser as the pump light source. Safety precautions are emphasized due to the inherent dangers of working with lasers and high voltages.

PREREQUISITES
  • Understanding of fiber laser technology and its components
  • Knowledge of ytterbium-doped fibers and their properties
  • Familiarity with diode lasers and their application in pumping
  • Awareness of safety protocols when working with high-powered lasers
NEXT STEPS
  • Research the specifications and sourcing of ytterbium-doped fibers
  • Learn about the operation and setup of diode lasers for pumping
  • Investigate laser safety measures and protective equipment
  • Explore the principles of fiber Bragg gratings in laser applications
USEFUL FOR

This discussion is beneficial for hobbyists, engineers, and makers interested in laser technology, particularly those looking to build their own fiber laser systems for metal engraving.

pml87
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hello, I'm interested in make an fibre laser to engrave in aluminum, however in all foruns where i ask this question everyone sugest me to buy an professional machine. but I'm interested in learn more about this tecnology so i would like to make my own fibre laser. of course some componets i know they should be necessary buy.
i found this project: http://192.197.62.35/staff/mcsele/lasers/LasersTEA.htm
to engrave in aluminum however people advised me fibre laser is better to engrave in metal pieces.
this LasersTEA prototype engraved in aluminum mixing nitrogen and helium gases.
some one have an idea how to do an homemade fibre laser?
or could give some opinion if this is a best laser type?
 
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First the disclaimer: Building and using lasers is dangerous. I assume you need invisible light around 1060 nm for engraving. This is even more dangerous. Always use safety glasses when working with such devices and be careful. I am not just saying that for fun. These are really dangerous. If you need high powers also high voltages come into play. These are even more dangerous and I strongly recommend not to use high voltages without someone around who is experienced with high voltages.

Now to the physics. I am afraid, you will not have much fun building your own fiber laser. Fiber lasers are basically just a long fiber including some dopant which gives the stimulated emission. I suppose you might need ytterbium doped fibers. These fibers are typically reflecting at their end, so that you have a low quality cavity. Alternatively one may use fiber Bragg gratings. Now all you do is pump this fiber with another laser, typically a diode laser and that is about all.

However, there is not much one can do. You will obviously need to buy the doped fiber as you cannot make it yourself and you will need to buy the pump light source. Coupling the light into the fiber is not really a big deal.