Sensitivity limitations in optical speed meter topology of gravitational-wave antennae
arXiv:gr-qc/0312016 · doi:10.1103/PhysRevD.69.102003
Abstract
The possible design of QND gravitational-wave detector based on speed meter principle is considered with respect to optical losses. The detailed analysis of speed meter interferometer is performed and the ultimate sensitivity that can be achieved is calculated. It is shown that unlike the position meter signal-recycling can hardly be implemented in speed meter topology to replace the arm cavities as it is done in signal-recycled detectors, such as GEO 600. It is also shown that speed meter can beat the Standard Quantum Limit (SQL) by the factor of in relatively wide frequency band, and by the factor of in narrow band. For wide band detection speed meter requires quite reasonable amount of circulating power MW. The advantage of the considered scheme is that it can be implemented with minimal changes in the current optical layout of LIGO interferometer.
arXiv comment20 pages, 12 figures
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