Zhang, T.; Bentley, J.; Miao, H. A Broadband Signal Recycling Scheme for Approaching the Quantum Limit from Optical Losses. Galaxies2021, 9, 3.
Zhang, T.; Bentley, J.; Miao, H. A Broadband Signal Recycling Scheme for Approaching the Quantum Limit from Optical Losses. Galaxies 2021, 9, 3.
Zhang, T.; Bentley, J.; Miao, H. A Broadband Signal Recycling Scheme for Approaching the Quantum Limit from Optical Losses. Galaxies2021, 9, 3.
Zhang, T.; Bentley, J.; Miao, H. A Broadband Signal Recycling Scheme for Approaching the Quantum Limit from Optical Losses. Galaxies 2021, 9, 3.
Abstract
Quantum noise limits the sensitivity of laser interferometric gravitational-wave detectors. Given the state-of-the-art optics, the optical losses define the lower bound of best possible quantum-limited detector sensitivity. In this work, we come up with the configuration which allows to saturate this lower bound by converting the signal recycling cavity to be a broadband signal amplifier using an active optomechanical filter. We will show the difference and advantage of such a broadband signal recycling scheme compared with the previous white-light-cavity scheme using the optomechanical filter in [Phys.Rev.Lett.115.211104 (2015)]. The drawback is that the new scheme is more susceptible to the thermal noise of the mechanical oscillator. To suppress the radiation pressure noise which rises along with the signal amplification, squeezing with input/output filter cavities and heavier test mass are used in this work.
Keywords
quantum loss limit; broadband signal recycling; optomechanical filter cavity
Subject
Physical Sciences, Optics and Photonics
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
