Force measurement in squeezed dissipative optomechanics in the presence of laser phase noise
| Autor: | Wen-ju Gu, Wen-Xing Yang, Yue-Yuan Wang, Li-hui Sun, Zhen Yi |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Physics
business.industry Shot noise Physics::Optics 02 engineering and technology Laser pumping 021001 nanoscience & nanotechnology 01 natural sciences Noise (electronics) Atomic and Molecular Physics and Optics 010309 optics Optics Homodyne detection 0103 physical sciences Phase noise Laser power scaling 0210 nano-technology business Optomechanics Squeezed coherent state |
| Zdroj: | Optics Express. 28:12460 |
| ISSN: | 1094-4087 |
| DOI: | 10.1364/oe.389854 |
| Popis: | We investigate the force measurement sensitivity in a squeezed dissipative optomechanics within the free-mass regime under the influence of shot noise (SN) from the photon number fluctuations, laser phase noise from the pump laser, thermal noise from the environment, and optical losses from outcoupling and detection inefficiencies. Generally, squeezed light could generate a reduced SN on the squeezed quadrature and an enlarged quantum backaction noise (QBA) due to the antisqueezed conjugate quadrature. With an appropriate choice of phase angle in homodyne detection, QBA is cancellable, leading to an exponentially improved measurement sensitivity for the SN-dominated regime. By now, the effects of laser phase noise that is proportional to laser power emerge. The balance between squeezed SN and phase noise can lead to an sub-SQL sensitivity at an exponentially lower input power. However, the improvement by squeezing is limited by optical losses because high sensitivity is delicate and easily destroyed by optical losses. |
| Databáze: | OpenAIRE |
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