Previously I had noted a slow oscillation in the output power of the front end laser.  The
plot AmplifierPower.png partly shows the oscillation but unfortunately the fluctuation seen
is the one dominated by the humidity change in the Laser Room.  However the fluctuations are
more obvious in the pump diode power plot (DiodePower.png).  The question is then what is
driving these fluctuations?

DiodeTEC.png shows the voltage applied to the Peltier cell to cool the pump diodes.  The
fluctuation is clearly seen here.  It is also evident in the pump diode voltage (DiodeVoltage.png)
and current (DiodeCurrent.png).  It is possible that we have a small oscillation in the output
of the front end laser's two power supplies.  Or as Richard pointed out to me, it's possible
that the two power supplies are beating against each other.

The oscillation is not evident in the pre-modecleaner reflected light signal, and so is probably
just a curiosity at the moment.