The new laser is pretty sweet. But before I get into the cool observations from today, I have one thing to share:
What the hell is going on here? This is the QPD signal of the beam after it goes through the AOM.
- We found the beam waist to be 1.26mm at a distance of about 625mm away from the laser aperture.
- We looked at the bare beam on the QPD and it looks really steady with a signal drift of less than 0.1V (meaning the fluctuations in the beam)
- Pranav took pictures of the beam profile and got a nice profile.
- I am going to email Gooch & Housego to see if there is anything they can do to explain why the laser behaves the way it does after the AOM.