  The gravitational wave detector of higher sensitivity and greater bandwidth
in kilohertz window is required for future gravitational wave astronomy and
cosmology. Here we present a new type broadband high frequency laser
interferometer gravitational wave detector utilizing polarization of light as
signal carrier. Except for Fabry-Perot cavity arms we introduce dual power
recycling to further amplify the gravitational wave signals. A novel method of
weak measurement amplification is used to amplify signals for detection and to
guarantee the long-term run of detector. Equipped with squeezed light, the
proposed detector is shown sensitive enough within the window from 300Hz to
several kHz, making it suitable for the study of high frequency gravitational
wave sources. With the proposed detector added in the current detection
network, we show that the ability of exploring binary neutron stars merger
physics be significantly improved. The detector presented here is expected to
provide an alternative way of exploring the possible ground-based gravitational
wave detector for the need of future research.
