2003/11/19 by Nicolas Treps, N. Treps, N. Grosse +13 · 1 citation
Engineering · Physics and Astronomy · #Advanced Fiber Laser Technologies #Degenerate energy levels #Displacement (psychology) #Lossless compression #Mechanical and Optical Resonators #Multi-mode optical fiber #Optical fiber #Optics #Photonic and Optical Devices #Physics #Quantum #Quantum limit #Quantum mechanics #Quantum noise #Resonator #Squeezed coherent state #Transverse plane #quant-ph
paper · pdf · doi:10.1088/1464-4266/6/8/007
published as J. Opt. B: Quantum Semiclass. Opt. 6 (2004) S664-S674 · 21 pages, 9 figures, submitted to "Special Issue on Fluctuations & Noise in Photonics & Quantum Optics" of J. Opt. B
arxiv created 2003/11/19 · openalex publication_date 2004/07/28 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We demonstrate the possibility of surpassing the quantum noise limit for simultaneous multi-axis spatial displacement measurements that have zero mean values. The requisite resources for these measurements are squeezed light beams with exotic transverse mode profiles. We show that, in principle, lossless combination of these modes can be achieved using the non-degenerate Gouy phase shift of optical resonators. When the combined squeezed beams are measured with quadrant detectors, we experimentally demonstrate a simultaneous reduction in the transverse x - and y -displacement fluctuations of 2.2 and 3.1 dB below the quantum noise limit.