Demonstration of displacement- and frequency-noise-free laser interferometry using bidirectional Mach-Zehnder interferometers.
We have demonstrated displacement- and frequency-noise-free laser interferometry (DFI) by partially implementing a recently proposed optical configuration using bidirectional Mach-Zehnder interferometers (MZIs). This partial implementation, the minimum necessary to be called DFI, has confirmed the essential feature of DFI: the combination of two MZI signals can be carried out in a way that cancels displacement noise of the mirrors while maintaining gravitational-wave signals. The attained maximum displacement-noise suppression was 45 dB.
Sato
Shuichi
S
TAMA project, National Astronomical Observatory of Japan, 2-21-1, Mitaka, Osawa, Tokyo 181-8588 Japan. sato.shuichi@nao.ac.jp
Kokeyama
Keiko
K
Ward
Robert L
RL
Kawamura
Seiji
S
Chen
Yanbei
Y
Pai
Archana
A
Somiya
Kentaro
K