Observation of enhanced optical spring damping in a macroscopic mechanical resonator and application for parametric instability control in advanced gravitational-wave detectors
Sascha SchediwySchool of Physics, The University of Western Australia, Nedlands, Western Australia 6009, AustraliaC. ZhaoSchool of Physics, The University of Western Australia, Nedlands, Western Australia 6009, AustraliaL. JuSchool of Physics, The University of Western Australia, Nedlands, Western Australia 6009, AustraliaD. G. BlairSchool of Physics, The University of Western Australia, Nedlands, Western Australia 6009, AustraliaP. A. WillemsSchool of Physics, The University of Western Australia, Nedlands, Western Australia 6009, Australia
2008en
ABI
Аннотация
We show that optical spring damping in an optomechanical resonator can be enhanced by injecting a phase delay in the laser frequency-locking servo to rotate the real and imaginary components of the optical spring constant. This enhances damping at the expense of optical rigidity. We demonstrate enhanced parametric damping which reduces the $Q$ factor of a 0.1-kg-scale resonator from $1.3\ifmmode\times\else\texttimes\fi{}{10}^{5}$ to $6.5\ifmmode\times\else\texttimes\fi{}{10}^{3}$. By using this technique adequate optical spring damping can be obtained to damp parametric instability predicted for advanced laser interferometer gravitational-wave detectors.
Перевод пока недоступен
Идентификаторы
Цитирования и источники
Цитирований: 2Использованных источников: 0