[Erin, Torrey]

The homeade power cable for the RF power amplifier properly draws current. We are supplying the amplifier with the same variable power source used on the other AOM set up. We aligned the AOM with the power off. The power to the RF amplifier is from Moku 1. The output is at its max 2 Vpp with a 10 db attenuator on the end, limiting it to .63 Vpp input on the RF Amplifier. The amplifier applies a 29 +/- 1 dbm boost, so at most we have about 1 W of power going to the AOM. Note that the manual says 2.2 W will start to cause damage.The output of the moku can go above 250 MHz which is the max we should need for these AOMs. Note that the RF signal from Moku 1 channel 4 should never be put in +14 db mode. This WILL cause damage to the AOM. It might be smarter to operate it in +14 db mode and use an appropriate attenuator so that damage can never be caused.

With the AOM properly powered we observe a 1st and 2nd order beam. With 2.05 mw incident power we are getting 1.45 mw in the first order beam (71% efficiency) and a negligible amount in the 2nd order beam (10 uW ish). This will be more than we need to lock the second filter cavity, and may even need to be attenuated. Tomorrow we will attempt to reflect it back and get a second pass, first order beam in the fiber coupler. For now we will use a flat mirror, the curved mirror will be used on a future set up.