Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2003-03-18
Phys.Rev. D68 (2003) 042001
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
10 pages, 5 figures
Scientific paper
10.1103/PhysRevD.68.042001
We theoretically analyze the quantum noise of signal-recycled laser interferometric gravitational-wave detectors with additional input and output optics, namely frequency-dependent squeezing of the vacuum entering the dark port and frequency-dependent homodyne detection. We combine the work of Buonanno and Chen on the quantum noise of signal-recycled interferometers with ordinary input-output optics, and the work of Kimble el al. on frequency-dependent input-output optics with conventional interferometers. Analytical formulas for the optimal input and output frequency dependencies are obtained. It is shown that injecting squeezed light with the optimal frequency-dependent squeezing angle into the dark port yields an improvement on the noise spectral density by a factor of exp(-2r) (in power) over the entire squeezing bandwidth, where r is the squeezing parameter. It is further shown that frequency-dependent (variational) homodyne read-out leads to an additional increase in sensitivity which is significant in the wings of the doubly resonant structure. The optimal variational input squeezing in case of an ordinary output homodyne detection is shown to be realizable by applying two optical filters on a frequency-independent squeezed vacuum. Throughout this paper, we take as example the signal-recycled topology currently being completed at the GEO600 site. However, theoretical results obtained here are also applicable to the proposed topology of Advanced LIGO.
Chelkowski Simon
Chen Yanbei
Danzmann Karsten
Franzen Alexander
Harms Jan
No associations
LandOfFree
Squeezed-input, optical-spring, signal-recycled gravitational-wave detectors 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 Squeezed-input, optical-spring, signal-recycled gravitational-wave detectors, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Squeezed-input, optical-spring, signal-recycled gravitational-wave detectors will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-118511