Speaker
Mr
Yutaro Enomoto
(ICRR, University of Tokyo)
Description
The design sensitivity of bKAGRA is limited by quantum noise for almost all the observation frequency band. As the first detection of gravitational waves by Advanced LIGO shows, it would be especially important to improve the sensitivity around 100 Hz, where radiation pressure noise would be dominant. To reduce radiation pressure noise and beat the standard quantum limit, a method where the ponderomotively-squeezed output field from the interferometer is detected with homodyne detection was proposed.
For the demonstration of the technique to reduce radiation pressure noise, an experiment with a cavity which has a milligram-scale suspended mirror as a end test mass is ongoing in our laboratory. In this presentation, overview and current status of the experiment are presented. Especially, a new method of intensity stabilization of light for the reduction of classical radiation pressure noise below quantum radiation pressure noise is presented.
Primary author
Mr
Yutaro Enomoto
(ICRR, University of Tokyo)
Co-authors
Prof.
Akira FURUSAWA
(University of Tokyo)
Mr
Koji Nagano
(ICRR)
Mr
Masayuki Nakano
(ICRR)
Prof.
Seiji Kawamura
(Institute for Cosmic Ray Research, The University of Tokyo)
