LaserUser.com Forum (formerly RDWorksLab)

I have my fingers crossed that some one can help.
My laser tube is firing 4 separate beams in a mode burn, from what I have read the tube mode has gone from TEM0 to TEM11 can any one shed any light on why my beam has changed modes and can I change it back

Thank you in advance
Mike

I'll be interested to hear what responses you get. I'm no expert, but I don't think it's fixable - get a new tube.