Simon, Pengbo

After the birefringence measurement, we change to the absorption system with a controllable polarization of the laser. First, we did two XY-plane absorption measurements on TAMA#1 with different polarization, which is P-pol and S-pol. Then we choose a small area of the mirror and did another measurement under the S-pol incident beam. We can see a very clear structure in the map. Then we did another YZ-plane absorption measurement with an S-pol incident beam. The distribution is quite homogenous.

We change the sample to Shinkosha #7, then follow what we did before, checking whether the polarization might have some influence on the absorption. We already have the result of the absorption map with the S-pol incident beam. The result is almost the same compare with the former result.