The influence of amplifier gain saturation in nonlinear amplifying loop mirror on simultaneous phase-preserving

regeneration of two power states has been studied. Numeri

cal simulations have shown an improvement of up to

4 dB for the first, low-power state and 8 dB for the se

cond high-power state. Compar

ed to the linear amplifier

case an improvement of 3 dB for the se

cond power state has been achieved.

},
author = {Roethlingshoefer, Tobias and Onishchukov, Georgy and Schmauß, Bernhard and Leuchs, Gerd},
booktitle = {Transparent Optical Networks (ICTON), 2011 13th International Conference on},
doi = {10.1109/ICTON.2011.5970803},
faupublication = {yes},
keywords = {2R regeneration, quadrature amplitude modulation, NALM, NOLM},
note = {lhft_intern.bib::Roethlingshoefer2011a},
peerreviewed = {Yes},
publisher = {Institute of Electrical & Electronics Engineers (IEEE)},
title = {{Using} saturation effects in a nonlinear amplifying loop mirror for multilevel phase-preserving amplitude regeneration},
venue = {Stockholm},
year = {2011}
}
@article{faucris.216318527,
abstract = {In this review we discuss intriguing properties of apparently classical optical fields, that go beyond purely classical context and allow us to speak about quantum characteristics of such fields and about their applications in quantum technologies. We briefly define the genuinely quantum concepts of entanglement and steering. We then move to the boarder line between classical and quantum world introducing quantum discord, a more general concept of quantum coherence, and finally a controversial notion of classical entanglement. To unveil the quantum aspects of often classically perceived systems, we focus more in detail on quantum discordant correlations between the light modes and on nonseparability properties of optical vector fields leading to entanglement between different degrees of freedom of a single beam. To illustrate the aptitude of different types of correlated systems to act as quantum or quantum-like resource, entanglement activation from discord, high-precision measurements with classical entanglement and quantum information tasks using intra-system correlations are discussed. The common themes behind the versatile quantum properties of seemingly classical light are coherence, polarization and inter and intra-mode quantum correlations.},
author = {Korolkova, N. and Leuchs, Gerd},
doi = {10.1088/1361-6633/ab0c6b},
faupublication = {yes},
journal = {Reports on Progress in Physics},
note = {CRIS-Team WoS Importer:2019-04-23},
peerreviewed = {Yes},
title = {{Quantum} correlations in separable multi-mode states and in classically entangled light},
volume = {82},
year = {2019}
}
@article{faucris.111000604,
author = {Leuchs, Gerhard and et al.},
author_hint = {König F., Buchler B., Rechtenwald T., Leuchs Gerd, Sizmann A.},
faupublication = {yes},
note = {UnivIS-Import:2015-03-09:Pub.2002.nat.dphy.optik.1optik.solito},
pages = {043810},
peerreviewed = {Yes},
support_note = {Author relations incomplete. You may find additional data in field 'author_hint'},
title = {{Soliton} back-action evading measurement using spectral filtering},
volume = {66},
year = {2002}
}
@inproceedings{faucris.117981204,
abstract = {A scheme for the generation of bright entangled beams is discussed. The Einstein-Podolsky-Rosen (EPR) quantum correlations are produced by letting two amplitude-squeezed bright optical fields interfere on a 50:50 beamsplitter. This is illustrated in the phase space representation in a single-mode picture. The phase and amplitude uncertainty measurements exhibit strong correlations and anticorrelations which can be detected by recording the difference of the photocurrents.},
author = {Leuchs, Gerhard and et al.},
author_hint = {Silberhorn Christine, Korolkova Natalia, Leuchs Gerd},
booktitle = {IQEC'2000 Conference Digest},
date = {2000-09-10/2000-09-15},
faupublication = {yes},
note = {UnivIS-Import:2015-04-16:Pub.2000.nat.dphy.optik.1optik.quantu_2},
pages = {8-},
peerreviewed = {No},
publisher = {IEEE},
support_note = {Author relations incomplete. You may find additional data in field 'author_hint'},
title = {{Quantum} cryptography with bright entangled beams},
venue = {Nice},
volume = {QMB6},
year = {2000}
}
@article{faucris.121032824,
abstract = {We report on interferometric characterization of a deep parabolic mirror with a depth of more than five times its focal length. The interferometer is of Fizeau type; its core consists of the mirror itself, a spherical null element, and a reference flat. Because of the extreme solid angle produced by the paraboloid, the alignment of the setup appears to be very critical and needs auxiliary systems for control. Aberrations caused by misalignments are removed via fitting of suitable functionals provided by means of ray tracing simulations. It turns out that the usual misalignment approximations fail under these extreme conditions.© 2008 Optical Society of America.},
author = {Leuchs, Gerhard and Mantel, Klaus and Berger, Andreas and Konermann, Hildegard and Sondermann, Markus and Peschel, Ulf and Lindlein, Norbert and Schwider, Johannes},
doi = {10.1364/AO.47.005570},
faupublication = {yes},
journal = {Applied optics},
note = {UnivIS-Import:2015-04-14:Pub.2008.nat.dphy.optik.1optik.interf},
pages = {5570-5584},
peerreviewed = {unknown},
title = {{Interferometric} null test of a deep parabolic reflector generating a {Hertzian} dipole field},
volume = {47},
year = {2008}
}
@article{faucris.117128044,
author = {Leuchs, Gerhard and et al.},
author_hint = {Quabis Susanne, Dorn Ralf, Eberler Manfred, Glöckl Oliver, Leuchs Gerd},
faupublication = {yes},
note = {UnivIS-Import:2015-03-09:Pub.2000.nat.dphy.optik.1optik.anewme},
pages = {60-61},
peerreviewed = {Yes},
support_note = {Author relations incomplete. You may find additional data in field 'author_hint'},
title = {{A} new method to reduce the spot size at a focused laser beam},
volume = {25},
year = {2000}
}
@article{faucris.111802724,
author = {Leuchs, Gerhard and Marquardt, Christoph and et al.},
author_hint = {Milanovic Josip, Heersink Joel, Marquardt Christoph, Huck A., Andersen Ulrik L., Leuchs Gerd},
faupublication = {yes},
journal = {Laser Physics},
note = {UnivIS-Import:2015-03-09:Pub.2007.nat.dphy.optik.1optik.polari},
pages = {559-566},
peerreviewed = {Yes},
support_note = {Author relations incomplete. You may find additional data in field 'author_hint'},
title = {{Polarization} squeezing with photonic crystal fibers},
volume = {17},
year = {2007}
}
@article{faucris.107119364,
abstract = {We review recent experimental advances in the field of efficient coupling of single atoms and light in free space. Furthermore, a comparison of efficient free space coupling and strong coupling in cavity quantum electrodynamics (QED) is given. Free space coupling does not allow for observing oscillatory exchange between the light field and the atom which is the characteristic feature of strong coupling in cavity QED. Like cavity QED, free space QED does, however, offer full switching of the light field, a 180° phase shift conditional on the presence of a single atom as well as 100% absorption probability of a single photon by a single atom. Furthermore, free space cavity QED comprises the interaction with a continuum of modes. © 2013 Copyright Taylor and Francis Group, LLC.},
author = {Leuchs, Gerhard and Sondermann, Markus},
doi = {10.1080/09500340.2012.716461},
faupublication = {yes},
journal = {Journal of Modern Optics},
keywords = {atom-photon coupling; free space QED; strong focussing},
pages = {36-42},
peerreviewed = {Yes},
title = {{Light}-matter interaction in free space},
volume = {60},
year = {2013}
}
@article{faucris.121752444,
abstract = {We report the first experimental demonstration of continuous variable cloning of phase-conjugate coherent states as proposed by Cerf and Iblisdir. In contrast to this proposal, the cloning transformation is accomplished using only linear optical components, homodyne detection, and feedforward. As a result of combining phase conjugation with a joint measurement strategy, superior cloning is demonstrated with cloning fidelities reaching 89%. © 2007 The American Physical Society.},
author = {Leuchs, Gerhard and et al.},
author_hint = {Sabuncu Metin, Andersen Ulrik L., Leuchs Gerd},
doi = {10.1103/PhysRevLett.98.170503},
faupublication = {yes},
journal = {Physical Review Letters},
note = {UnivIS-Import:2015-03-09:Pub.2007.nat.dphy.optik.1optik.experi_7},
pages = {170503},
peerreviewed = {Yes},
support_note = {Author relations incomplete. You may find additional data in field 'author_hint'},
title = {{Experimental} demonstration of continuous variable cloning with phase-conjugate inputs},
volume = {98},
year = {2007}
}
@incollection{faucris.123326324,
address = {New York},
author = {Leuchs, Gerhard and et al.},
author_hint = {Lorenz S., Korolkova N., Lütkenhaus Norbert, Leuchs Gerd},
booktitle = {Quantum Communications and Cryptograph},
faupublication = {yes},
note = {UnivIS-Import:2015-04-20:Pub.2006.nat.dphy.optik.1optik.experi_8},
pages = {103-125},
peerreviewed = {Yes},
publisher = {CRC, Taylor & Francis Group},
support_note = {Author relations incomplete. You may find additional data in field 'author_hint'},
title = {{Experimental} cryptography using continuous polarization states},
year = {2006}
}
@article{faucris.111895564,
abstract = {The fidelity of a quantum transformation is strongly linked with the prior partial information of the state to be transformed. We illustrate this interesting point by proposing and demonstrating the superior cloning of coherent states with prior partial information. More specifically, we propose two simple transformations that under the Gaussian assumption optimally clone symmetric Gaussian distributions of coherent states as well as coherent states with known phases. Furthermore, we implement for the first time near-optimal state-dependent cloning schemes relying on simple linear optics and feedforward. © 2008 The American Physical Society.},
author = {Leuchs, Gerhard and et al.},
author_hint = {Sabuncu Metin, Leuchs Gerd, Andersen Ulrik L},
doi = {10.1103/PhysRevA.78.052312},
faupublication = {yes},
journal = {Physical Review A},
note = {UnivIS-Import:2015-03-09:Pub.2008.nat.dphy.optik.1optik.experi_3},
pages = {052312},
peerreviewed = {Yes},
support_note = {Author relations incomplete. You may find additional data in field 'author_hint'},
title = {{Experimental} continuous-variable cloning of partial quantum information},
volume = {78},
year = {2008}
}
@article{faucris.216807722,
abstract = {High-speed optical telecommunication is enabled by wavelength-division multiplexing, whereby hundreds of individually stabilized lasers encode information within a single-mode optical fibre. Higher bandwidths require higher total optical power, but the power sent into the fibre is limited by optical nonlinearities within the fibre, and energy consumption by the light sources starts to become a substantial cost factor