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This is the Nd:YAG laser cavity i assembled and it have 50W output at 1066nm.

The pics are from YAG module, the heart of laser. The module have inside three 20W laser diode that pump a Nd:YAG rod , the module is assembled betwen two mirror mount with mirror 100% reflective behind and 80% to output as any laser. The module is powered by a driver and colled with a water chiller.

Step 1: Components

This is the Nd:YAG laser cavity i assembled and it have 50W output at 1066nm.
The pics are from YAG module, outside and inside, the heart of laser.

The module have inside three 20W laser diode that pump a Nd:YAG rod , the module is assembled betwen two mirror mount with mirror 100% reflective behind and 80% to output as any laser. The module is powered by a driver and colled with a water chiller.

Step 2: Assembling

This is the first assembling, over an acrylic base and after over an aluminium base.

Step 3: Videos From Test.

First video is the first alignment test. the second vídeo is the cavity full assemble with beam expander and lens head.

<p>Hi, this is a great project! Congratulations!!! :D<br><br>Can you give more details about it?<br><br>Where have you bought the parts?<br><br>How did you calculated the distances between the reflective parts?<br><br>How do you control the laser?</p><p>Best regards</p>
<p>Hi, thank you, this is a simple assembly with only 50W for my technicians to learn how to do YAG cavity alignment. I&acute;m physicist and work with lasers since 1983, so a have many parts to many kinds of lasers. I usualy design and assembly industrial laser machines to cutting, marking and deep engraving on metals. The yag laser is already obsolete, now i use only Fiber laser to metals. </p><p><iframe allowfullscreen="" frameborder="0" height="281" src="//www.youtube.com/embed/VWwZ5-zZeV8" width="500"></iframe></p><p>https://www.youtube.com/watch?v=IPA66vazz8E&amp;t=29s</p>
Hi, that's great.<br>So you're an expert on the field. That's awesome.<br>I doing my Master degree in Mechatronical Engineering and I am trying to build a YAG/Fiber laser engraving/cutting machine. I am trying to build it myself from basic components and controlling it by some kind of G-Code instructions. This solution will not be professional, but I think it will be cheaper this way.<br><br>Do you have some advices on how to build it and how to choose the components?<br>The alignment stage is critical. How can I do it properly? How to calculate the distance between the back and front mirrors?<br>Do you use commercial software, like Ezcad, or some other based in G-Code, for example?<br>The power supply you use could, technically power other kind of lasers, or just that one?<br><br>Sorry for all the questions.<br>Thanks in advance for all your help.<br>Best regards

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