[Jeff, Sander, Daniel]

The power distribution sled has been aligned to provide power to the 3 fibers: OFC, misc, and SHG.

First, we turned on the laser seeder and amplifier according to the SOP. With a 24.7 mW input from the seeder and 0.01 A laser current (the minimum value), the amplifier output 382 mW measured on the power meter.

I aligned the mount that holds the amplifier output so that the beam went through the faraday isolator, and checked the beam position at the fiber couplers. The beam was low on all of them, so I walked the beam up then used the final mirror and a card to steer the beam into the fiber coupler. At this point I adjusted the half wave plate after the Faraday isolator so that the beam on the distribution path was 24 mW.

Summary of fiber coupler alignment:

SHG: could not recover alignment initially so used the 'fiber flashlight' red beam propagating backwards from the SHG sled to get good enough alignment to see power on the power meter on the other side. Coupling efficiency: 3.8 mW / 4.0 mW = 95%

OFC: Placed the power meter in front of the photodiode which collects light from the first PBS after the launcher, and small tweaks to the steering mirror were enough to see power. The beam makes it through both the EOM and the EOAM, and hits the cavity mirror. Coupling efficiency: 860 µW / 970 µW = 88%

Misc: Alignment was already pretty good, just needed tuning. This power is being split, half is dumped and half goes to a fiber cap. Coupling efficiency: 3.1 mW / 3.4 mW = 94%