Abstract

The gravitational wave (GW) detection is one of the most critical measurements we have ever challenged because the interaction of GW with matter and space is extremely weak. However, this is the most attractive feature of GW because GW can bring some information from very critical condition like pre-black holes or the core of neutron stars. No other waves but GW can escape from such a high density area. The goal of sensitivity of the 3 or 4-km size GW antenna for GW observatory in future is δh/h ~ 10^-21, that mean the minimum displacement we have to measure is something like 10^-6 angstrom. The requirement for laser source is so crucial that the acceptable noise figure is the same level of the shot noise limit of a kW laser.

© 1995 IEEE