Improving the sensitivity to gravitational-wave sources by modifying the input-output optics of advanced interferometers

Details Improving the sensitivity to gravitational-wave sources by modifying the input-output optics of advanced interferometers Improving the sensitivity to gravitational-wave sources by modifying the input-output optics of advanced interferometers

2003-10-05

arxiv.org/abs/gr-qc/0310026v4

Phys.Rev. D69 (2004) 102004

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

Figs. 9 and 12 corrected; Appendix added for narrowband data analysis

Scientific paper

10.1103/PhysRevD.69.102004

We study frequency dependent (FD) input-output schemes for signal-recycling interferometers, the baseline design of Advanced LIGO and the current configuration of GEO 600. Complementary to a recent proposal by Harms et al. to use FD input squeezing and ordinary homodyne detection, we explore a scheme which uses ordinary squeezed vacuum, but FD readout. Both schemes, which are sub-optimal among all possible input-output schemes, provide a global noise suppression by the power squeeze factor, while being realizable by using detuned Fabry-Perot cavities as input/output filters. At high frequencies, the two schemes are shown to be equivalent, while at low frequencies our scheme gives better performance than that of Harms et al., and is nearly fully optimal. We then study the sensitivity improvement achievable by these schemes in Advanced LIGO era (with 30-m filter cavities and current estimates of filter-mirror losses and thermal noise), for neutron star binary inspirals, and for narrowband GW sources such as low-mass X-ray binaries and known radio pulsars. Optical losses are shown to be a major obstacle for the actual implementation of these techniques in Advanced LIGO. On time scales of third-generation interferometers, like EURO/LIGO-III (~2012), with kilometer-scale filter cavities, a signal-recycling interferometer with the FD readout scheme explored in this paper can have performances comparable to existing proposals. [abridged]

Affiliated with

Also associated with

No associations

Rating

Improving the sensitivity to gravitational-wave sources by modifying the input-output optics of advanced interferometers does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Improving the sensitivity to gravitational-wave sources by modifying the input-output optics of advanced interferometers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Improving the sensitivity to gravitational-wave sources by modifying the input-output optics of advanced interferometers will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-652200