Aidan, David, Heintze, Thomas, Greg.

Yesterday, to map out the response of the CO2X laser as a function of PZT voltage and temperature, we drove the PZT on the CO2X laser with a 30V amplitude, 50mHz triangle wave whilst increasing the temperature slowly. The resulting phase space is mapped out in the attached density plot. By noting when the laser mode hops (at a given length of the cavity), we mapped out lines of isolength. They have slope of 1.25mK/V - this implies that a 1.25mK change in temperature of the laser yields the equivalent length change to a 1V change in the PZT voltage.

The PZT voltage has a range of 70V. Therefore, the PZT can compensate for a change in temperature of 87.5mK, or +/- 44mK.