[Torrey]

Took a profile of the beam coming out of the amplifier. Attached is a plot with data and a fit. As you can see it is well collimated. The approximate radius coming directly out of the amplifier ~1micron. The damage threshold of the FI is 250W/cm^2. The peak intensity of a guassian 5 W beam out of the amplifier is then ~5 W / (pi * .1cm^2) *2 = 318 W/cm^2. I'd therefore suggest opperating at around 1.5A pump current to achieve ~2.4 W output at least to start. Alternatively we could have the FI farther away from the amplifier output.