Got an email today from Edmund Optics. They now offer low cost beam expanders of various fixed powers and wavelengths. https://www.edmundoptics.com/optics/laser-optics/laser-beam-expanders/lc-fixed-yag-beam-expanders/3775/
Yes, Sanwu does, but it's only a 3x expansion and it's unknown if the optics are made for specific wavelengths. The price is equal to the Jet lasers expander. And if you want this expander and live in the states you can order one and receive it in a few days.I wouldn't call >$100 cheap. Sanwu makes some for $55. Might be a deal if you need a very large one though.
True. Looking at the schematic it seems at least one of the optical elements can be swapped with an optical element suitable for a particular wavelength.All of them are made for either 355nm, UV, 532nm or 1064 YAG. It doesn't cover much of what we use here. I would expect them to be of good quality, but when was the last time you needed a 355nm or a 1064nm beam expander?
That was my thought as well, but I'd check with Edmund first before just making that assumption. I have doubts about the expander for 355nm being compatible with a 405nm laser.True. Looking at the schematic it seems at least one of the optical elements can be swapped with an optical element suitable for a particular wavelength.
The green expander would work with 520nm. I suspect the 355nm would work at 405nm. If Edmund was using UV optics the expander would be expensive.