Abstract:
�@Gravitational waves are ripple of space-time which nobody ever directly detected.
 Advanced LIGO is an ambitious U.S. project that improves the sensitivity of LIGO
 (Laser Interferometer Gravitational-wave Observatory) and will be capable of 
detecting a gravitational wave event from a neutron star binary at a distance of 200 Mpc.
 The detection rate of advanced LIGO, if running fully at the design sensitivity, 
may reach as high as a few events per year and therefore it will consequently allow
 us for opening a new astronomy branch, gravitational-wave astronomy. After finishing
 all the installation in this Spring, we have spent our time on tuning the interferometers
 in order to prepare for the planned first observation run. The observation run will
 start at 14th of this September for three months with a lowered laser power.
In this talk, I will give an overview of advanced LIGO together with some highlights from
 the recent turning experiments, and finally talk about possible detection scenarios.