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Registered Member #3215
Joined: Sun Sept 19 2010, 08:42PM
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Posts: 780
Pump diode in pristine condition
Doing less than the rated power due to adjustments needed in crystal temperatures and/or slight alignment of the crystals, but this should be optimal already (actual statement mihgt be false and they could do more than 25mW as I have no mean of checking... in comparison to a 50mW known pointer those lasers are slightly brighter!)
They are normally SLM but I can't judge this, I acquired them from surplus industrial metrology but they are not worn out by a life of use, rather upgrade replacements I guess, that I realigned carefully following all the rules for that kind of business
I aligned them and adjusted temperatures for max power and stability, and for best beam quality, so they are in decent shape for anyone wanting to do holography or spectrometry
The cavity design is OC less so I think the coatings are on the KTP, there are two TECs to regulate diode and KTP, and the KTP is on a sapphire plate
Reaction time of these heads to TEC temperature is incredibly fast so it is easy to adjust them and get visual results fast
The overall design is of high quality lab grade ans M2 of those lasers is small, and beam diameter is around 0.5mm at the output with low divergence
I sell them for 100€ a piece, with lab driver and no warranty about the modes of the cavity (the beam is pure gaussian when expanded, though, and should stay like that for long... artefacts in the expanded image are due to crappy lens put in front)
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FOR SALE : two green DPSS lasers, crystalaser 25mW units, lab style, great quality
