Abstract
The injection of squeezed light can be used to improve the sensitivity of an interferometer beyond the limit imposed by the zero-point fluctuation of the electromagnetic field. Here, we report on the realization of such a quantum-enhanced interferometer with a fiber-based Sagnac topology. Continuous wave squeezed states at with a noise reduction of below shot noise were produced by type I optical parametric amplification and subsequently injected into the dark port of the interferometer. A reduction of the interferometer shot noise by was observed, and the enhancement of the signal-to-noise ratio for a phase modulation signal generated within the interferometer could be demonstrated. We achieved a 95% fiber transmission for the squeezed states, which suggests that corresponding fiber-based quantum metrology and communication systems are feasible.
© 2010 Optical Society of America
Full Article | PDF ArticleMore Like This
Ulrich B. Hoff, Glen I. Harris, Lars S. Madsen, Hugo Kerdoncuff, Mikael Lassen, Bo M. Nielsen, Warwick P. Bowen, and Ulrik L. Andersen
Opt. Lett. 38(9) 1413-1415 (2013)
André Thüring, Christian Gräf, Henning Vahlbruch, Moritz Mehmet, Karsten Danzmann, and Roman Schnabel
Opt. Lett. 34(6) 824-826 (2009)
Chuan Xu, Lidan Zhang, Songtao Huang, Taxue Ma, Fang Liu, Hidehiro Yonezawa, Yong Zhang, and Min Xiao
Photon. Res. 7(6) A14-A26 (2019)