"Ken-ichi Harada,Sotatsu Otabe,Kaido Suzuki,Kentaro Somiya","Signal amplification experiment at Tokyo Tech","3rd QFilter workshop",,,,,,2021,June "Ken-ichi Harada,Sotatsu Otabe,Kaido Suzuki,Kentaro Somiya","Optical-parametric signal-amplification for a high-frequency gravitational-wave detector","GWADW2021",,,,,,2021,May "Kaido Suzuki,Ken-ichi Harada,Sotatsu Otabe,Kentaro Somiya","Stabilization of a parametric signal-amplification system using a digital signal-processing device","GWADW2021",,,,,,2021,May