For several weeks I had a functionally dead Spectra Physics 907 laser. This was especially bad because this laser is the one I use for mastering my holograms which meant I couldn’t make anything new until it was fixed.
During those weeks I picked brains and websites far and wide and managed to get the laser lasing again (several times in fact) but couldn’t get the beam quality back the way it was before I screwed it up. I ended up enlisting the help of a local laser expert and was able to get beam power and quality back where it needed to be.
What follows is a tutorial on how to re-align an external mirror laser. Most specifically the Spectra Physics 907. I also include some tips on cleaning the mirrors and removing stuck boots.
Before I go any further I want to thank the following people:
The guys at the Holography Forum who provided suggestions for getting the beast aligned. Tony, BobH, Wler, Colin, Ron Michael, Martin, JohnFP, dcgman.
Sam Goldwasser for making public such a treasure-trove of information about lasers.
Tom Ehrichs for spending time cleaning and aligning the laser. I gained as much by watching him work as I did by him working.