Zobrazeno 1 - 10
of 22
pro vyhledávání: '"Delaubert, Vincent"'
Autor:
Delaubert, Vincent
L'optique quantique multi-mode spatiale, encore appelée « imagerie quantique », permet d'étudier la détection d'un paramètre physique quelconque au sein d'une image optique. Nous considérons en particulier la mesure de déplacement transverse
Externí odkaz:
http://tel.archives-ouvertes.fr/tel-00146849
http://tel.archives-ouvertes.fr/docs/00/14/68/49/PDF/theseVD-UPMC.pdf
http://tel.archives-ouvertes.fr/docs/00/14/68/49/PDF/theseVD-UPMC.pdf
We determine the bound to the maximum achievable sensitivity in the estimation of a scalar parameter from the information contained in an optical image in the presence of quantum noise. This limit, based on the Cramer-Rao bound, is valid for any imag
Externí odkaz:
http://arxiv.org/abs/quant-ph/0609188
Autor:
Delaubert, Vincent, Treps, Nicolas, Lassen, Mikael, Harb, Charles C., Fabre, Claude, Lam, Ping Koy, Bachor, Hans A.
We report an experimental demonstration of optimal measurements of small displacement and tilt of a Gaussian beam - two conjugate variables - involving a homodyne detection with a TEM10 local oscillator. We verify that the standard split detection is
Externí odkaz:
http://arxiv.org/abs/quant-ph/0607142
Autor:
Lassen, Mikael, Delaubert, Vincent, Harb, Charles C., Treps, Nicolas, Lam, Ping Koy, Bachor, Hans A.
Publikováno v:
Journal of the European Optical Society - Rapid Publications 1, 06003 (2006)
We demonstrate quantum correlations in the transverse plane of continuous wave light beams by producing -4.0 dB, -2.6 dB and -1.5 dB of squeezing in the TEM00, TEM10 and TEM20 Hermite- Gauss modes with an optical parametric amplifier, respectively. T
Externí odkaz:
http://arxiv.org/abs/quant-ph/0606085
Autor:
Hsu, Magnus T. L., Delaubert, Vincent, Bowen, Warwick P., Fabre, Claude, Bachor, Hans-A., Lam, Ping Koy
Publikováno v:
IEEE Journal of Quantum Electronics 10, 1001 (2006)
We propose a scheme which encodes information in both the longitudinal and spatial transverse phases of a continuous-wave optical beam. A split detector-based interferometric scheme is then introduced to optimally detect both encoded phase signals. I
Externí odkaz:
http://arxiv.org/abs/quant-ph/0602132
Publikováno v:
Physical Review A 73 (2006) 013820
We propose an optical read-out scheme allowing a demonstration of principle of information extraction below the diffraction limit. This technique, which could lead to improvement in data read-out density onto optical discs, is independent from the wa
Externí odkaz:
http://arxiv.org/abs/quant-ph/0512152
Publikováno v:
Optics Letters 31 (2006) 1537
We consider the problem of measurement of optical transverse profile parameters and their conjugate variable. Using multi-mode analysis, we introduce the concept of detection noise-modes. For Gaussian beams, displacement and tilt are a pair of transv
Externí odkaz:
http://arxiv.org/abs/quant-ph/0512151
We consider the general problem of the quantum noise in a multipixel measurement of an optical image. We first give a precise criterium in order to characterize intrinsic single mode and multimode light. Then, using a transverse mode decomposition, f
Externí odkaz:
http://arxiv.org/abs/quant-ph/0407246
Publikováno v:
J. Opt. B: Quantum Semiclass. Opt. 6 (2004) 495-501
We derive the quantum noise limit for the optical beam displacement of a TEM00 mode. Using a multimodal analysis, we show that the conventional split detection scheme for measuring beam displacement is non-optimal with 80% efficiency. We propose a ne
Externí odkaz:
http://arxiv.org/abs/quant-ph/0407209
Autor:
Wagner, Katherine, Janousek, Jiri, Delaubert, Vincent, Zou, Hongxin, Harb, Charles, Treps, Nicolas, Morizur, Jean Francois, Lam, Pring Koy, Bachor, Hans A.
Publikováno v:
Science, 2008 Jul . 321(5888), 541-543.
Externí odkaz:
https://www.jstor.org/stable/20054592
