Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2009-03-19
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
v2: Changes were made to clarify various aspects of the paper, especially the generation of the grating displacement noise sid
Scientific paper
Diffraction gratings have been proposed as core elements in future laser-interferometric gravitational-wave detectors. In this paper, we use a steady-state technique to derive coupling of lateral grating displacement to the output ports of a diffractive Fabry-Perot cavity. By introducing a signal to noise ratio (SNR) for each of the three cavity output ports the magnitude of the noise sidebands originating from lateral grating displacement are compared to the magnitude of a potential gravitational wave signal. For the example of a 3km long Fabry-Perot cavity featuring parameters similar to the planned Advanced Virgo instrument, we found that the forward-reflecting grating port offers the highest SNR at low frequencies. Furthermore, for this example suspension requirements for lateral isolation were computed, and a factor of twenty relaxation at a frequency of 10Hz can be gained over the transmitted port by observing the forward-reflected port.
Barr Brittni
Burmeister Oliver
Chelkowski Simon
Freise Andreas
Hallam J.
No associations
LandOfFree
Coupling of lateral grating displacement to the output ports of a diffractive Fabry-Perot cavity 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 Coupling of lateral grating displacement to the output ports of a diffractive Fabry-Perot cavity, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Coupling of lateral grating displacement to the output ports of a diffractive Fabry-Perot cavity will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-648659