N Treps et al 2004 J. Opt. B: Quantum Semiclass. Opt. 6 S664 doi:10.1088/1464-4266/6/8/007
N Treps1,2,3, N Grosse1, W P Bowen1, M T L Hsu1, A Maître2, C Fabre2, H-A Bachor1 and P K Lam1
Show affiliationsWe 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.
42.50.Lc Quantum fluctuations, quantum noise, and quantum jumps
Issue 8 (August 2004)
Received 18 November 2003, accepted for publication 16 February 2004
Published 27 July 2004
N Treps et al 2004 J. Opt. B: Quantum Semiclass. Opt. 6 S664
V Delaubert et al 2002 J. Opt. A: Pure Appl. Opt. 4 393
Nathan E Hultman and Jonathan G Koomey 2007 Environ. Res. Lett. 2 034002
A Menciassi et al 2005 J. Micromech. Microeng. 15 2045
Y Hatsugai 1997 J. Phys.: Condens. Matter 9 2507
S Bietti et al 2009 IOP Conf. Ser.: Mater. Sci. Eng. 6 012009
J H Hannay 1998 J. Phys. A: Math. Gen. 31 L53
R Beals et al 1999 Inverse Problems 15 L1
R Haydock et al 1972 J. Phys. C: Solid State Phys. 5 2845
R Haydock et al 1975 J. Phys. C: Solid State Phys. 8 2591