Beg your pardon, but I think I would know (PhD in experimental AMO physics). It was one of these: https://www.ipgphotonics.com/en/products/lasers/low-power-cw-

Beg your pardon, but I think I would know (PhD in experimental AMO physics). It was one of these: https://www.ipgphotonics.com/en/products/lasers/low-power-cw-fiber-lasers/1-53-1-65-micron/elm-and-elr-1-100-w https://www.ipgphotonics.com/en/products/lasers/low-power-cw...