Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998tx19.confe.472b&link_type=abstract
Abstracts of the 19th Texas Symposium on Relativistic Astrophysics and Cosmology, held in Paris, France, Dec. 14-18, 1998. Eds.:
Astronomy and Astrophysics
Astrophysics
Scientific paper
We have developed a numerical simulation program to predict the performance of interferometric detectors in the Laser Interferometer Gravitational-Wave Observatory (LIGO) Project. The program can model a wide variety of optical deformations, including mirror surface roughness and substrate inhomogeneities. We have used it to analyze an Advanced-LIGO configuration known as "Dual Recycling", and we show that the tuned and narrow-banded signal responses predicted for this configuration can be achieved with imperfect optics. Dual Recycling has lower losses at the interferometer signal port than the standard configuration, though not significantly improved tolerance to mirror roughness deformations in terms of maintaining high signals. Finally, it is shown that "Wavefront Healing", the claim that losses can be re-injected into the system for signal generation, is limited in practice for optics which cause large scattering losses.
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