[Enomoto, Sugimoto]

This is continuation of 9804.

Today we installed the optics for the X arm side fiber noise cancellation (first figure), and locked the interferometer.

The OLTF shown in the second figure.

The bandwidth of the this loop is narrower than the Y arm side since the large resonance exist around 3.5kHz.

We also locked the both side of the cancellation loop, and measured the control signal simultaneously.

That is equivalent to the each side fiber noise.

These are similar but not same level at all frequency region.