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- A Martin, V Cristofori, +5 authors S Tanzilli
- Optics express
- 2009

We report the realization of a new polarization entangled photon-pair source based on a titanium-indiffused waveguide integrated on periodically poled lithium niobate pumped by a CW laser at 655 nm. The paired photons are emitted at the telecom wavelength of 1310 nm within a bandwidth of 0.7 nm. The quantum properties of the pairs are measured using a… (More)

- Christoph Clausen, Félix Bussières, +5 authors Nicolas Gisin
- 2014

We present a source of polarization-entangled photon pairs suitable for the implementation of long-distance quantum communication protocols using quantum memories. Photon pairs with wavelengths 883 nm and 1338 nm are produced by coherently pumping two periodically poled nonlinear waveguides embedded in the arms of a polarization interferometer. Subsequent… (More)

- E. Saglamyurek, N. Sinclair, +7 authors W. Sohler
- 2011 ICO International Conference on Information…
- 2011

We report the reversible transfer of photon-photon entanglement, generated by means of spontaneous parametric down-conversion, into entanglement between a photon and a collective atomic excitation in a thulium-doped lithium niobate waveguide cooled to 3 K.

- Robert Iwanow, Daniel A May-Arrioja, Demetrios N Christodoulides, George I Stegeman, Yoohong Min, Wolfgang Sohler
- Physical review letters
- 2005

We report the first observation of discrete Talbot revivals in one-dimensional waveguide arrays. Unlike continuous systems where the Talbot self-imaging effect always occurs irrespective of the pattern period, in discrete configurations this process is only possible for a specific set of periodicities. Recurrence of different input periodic patterns is… (More)

- Harald Herrmann, Xu Yang, Abu Thomas, Andreas Poppe, Wolfgang Sohler, Christine Silberhorn
- Optics express
- 2013

We present an integrated source of polarization entangled photon pairs in the telecom regime, which is based on type II-phasematched parametric down-conversion (PDC) in a Ti-indiffused waveguide in periodically poled lithium niobate. The domain grating - consisting of an interlaced bi-periodic structure - is engineered to provide simultaneous phase-matching… (More)

Discrete solitons with two frequency components mutually locked by a quadratic nonlinearity have been observed for the first time. Optical experiments have been performed in arrays of coupled channel waveguides with tunable cascaded quadratic nonlinearity. The tunability was the prerequisite that soliton species with different topology could be identified… (More)

Single-photon entanglement is a simple form of entanglement that exists between two spatial modes sharing a single photon. Despite its elementary form, it provides a resource as useful as polarization-entangled photons and it can be used for quantum teleportation and entanglement swapping operations. Here, we report the first experiment where single-photon… (More)

- Neil Sinclair, Erhan Saglamyurek, +8 authors Wolfgang Tittel
- Physical review letters
- 2014

Future multiphoton applications of quantum optics and quantum information science require quantum memories that simultaneously store many photon states, each encoded into a different optical mode, and enable one to select the mapping between any input and a specific retrieved mode during storage. Here we show, with the example of a quantum repeater, how to… (More)

- Georgios A Siviloglou, Konstantinos G Makris, +5 authors Wolfgang Sohler
- Optics express
- 2006

We report the first observation of discrete quadratic surface solitons in self-focusing and defocusing periodically poled lithium niobate waveguide arrays. By operating on either side of the phase-matching condition and using the cascading nonlinearity, both in-phase and staggered discrete surface solitons were observed. This represents the first… (More)

- Robert Iwanow, George Stegeman, Roland Schiek, Yoohong Min, Wolfgang Sohler
- Optics express
- 2005

Parametric gain associated with discrete modulational instability due to the second order nonlinearity chi(2)(-2omega;omega,omega) was investigated experimentally in periodically poled lithium niobate arrays of weakly coupled channel waveguides for conditions of both positive and negative phase-mismatch for second harmonic generation.