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Schlagwörter:
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Zusammenfassung:
All-reflective configurations have been suggested for future laser-interferometric
gravitational wave detectors. Diffraction gratings would be required as core elements of any
such design. In this paper, coupling of lateral grating displacement to the output ports of a
diffractive Fabry-Perot cavity was derived using a steady-state technique. The signal to noise
ratio versus a potential gravitational wave signal was compared for each cavity output port.
For a cavity featuring parameters similar to the planned Advanced Virgo instrument, we found
the forward-reflected port offers the highest SNR at low frequencies. Furthermore, the lateral
isolation suspension requirements were relaxed by a factor of twenty at a frequency of 10Hz
versus the transmitted port.
