In recent decades, advancements in laser technology has made the creation of femtosecond lasers possible. This is a special type of laser where the laser beam consists of repeated high energy light bursts just a few hundred femtoseconds long as opposed to of the continuous laser beams found in every common laser pointer. The short pulse duration paired with the high energy in each burst results in a significant peak power, making the laser capable of processing materials in a way that a regular laser cannot. However, the large size and weight of the machines capable of producing femtosecond laser beams often require them to remain stationary. To utilize the laser beam for processing, precise redirection is necessary. In this report, we describe our process of converting a regular CNC machine into a laser processing station and present our findings from writing on glass, metal foil and KTP crystals. The machine is capable of following CAD instructions with micrometer precision to alter, inscribe and cut a range of materials. Processing was conducted with green ($\lambda$=514 nm) as well as infrared laser ($\lambda$=1028 nm), yielding better results for the latter. The finished laser setup could be used to repeatedly and reliably process all materials, with promising results on KTP when combined with chemical etching.
| Identifer | oai:union.ndltd.org:UPSALLA1/oai:DiVA.org:kth-349333 |
| Date | January 2024 |
| Creators | Marthinsson, Gustav, Thorén, Karl |
| Publisher | KTH, Skolan för teknikvetenskap (SCI) |
| Source Sets | DiVA Archive at Upsalla University |
| Language | English |
| Detected Language | English |
| Type | Student thesis, info:eu-repo/semantics/bachelorThesis, text |
| Format | application/pdf |
| Rights | info:eu-repo/semantics/openAccess |
| Relation | TRITA-SCI-GRU ; 2024:166 |
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