Design study and prototype experiment of the KAGRA output mode-cleaner

11th Edoardo Amaldi Conference on Gravitational Waves

Yano, Kazushiro^1 ; Kumeta, Ayaka^1 ; Somiya, Kentaro^1

Department of Physics, Tokyo Institute of Technology, 2-12-1, Oh-okayama, Meguro-ku, Tokyo

152-8551, Japan^1

关键词: Control schemes;    Design studies;    Gravitational wave detectors;    Optical parameter;    Proper design;    Prototype experiment;    Reference lights;    Signal extraction;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/716/1/012032/pdf
DOI  :  10.1088/1742-6596/716/1/012032

来源: IOP

【 摘 要 】

The sensitivity of the Japanese gravitational-wave detector KAGRA is limited mainly by quantum noise. In order to reduce the quantum noise level, KAGRA employs an output mode-cleaner (OMC), which filters out junk light to clean up the signal and the reference light at the signal extraction port. The proper design of the OMC is a key to achieve the target sensitivity of KAGRA. In this proceeding, we present two results. One is the final result of numerical simulations, from which we determined the optical parameters of the OMC. The other is the latest results of our prototype experiment, the goal of which is to establish the control scheme of the OMC.