Concept

Amplificateur paramétrique optique

Publications associées (212)

Advanced trends in nonlinear optics applied to distributed optical-fibre sensors

The distributed optical-fibre sensors based on the properties of Brillouin scattering is the central object of this thesis. In the past decade, optical fibres have gained a large interest as sensors: attractive solutions based on the non-linear stimulated ...

EPFL2006

Raman-induced signals in optical Kerr effect measurements of water with elliptically polarized pulses

Majed Chergui, Frank van Mourik, Erwin Portuondo Campa

In 2-color optical Kerr effect measurements of water, addnl. signals can occur in the pulse overlap region if the energy difference between pump and probe pulses approaches the Raman resonance of the OH-stretch vibration. These features can be understood b ...

2006

Visualization of optical pulse filamentation by femtosecond time-resolved optical polarigraphy

Demetri Psaltis, Ye Pu

We have observed the filamentation of optical pulses in carbon disulfide(CS2) using femtosecond time-resolved optical polarigraphy(FTOP)1. A pump-probe setup is used to capture the propagation of a 150 femtosecond laser pulse in CS2. The probe pulse propag ...

2005

Spontaneous spectral phase conjugation for coincident frequency entanglement

Demetri Psaltis

Spontaneous parametric processes pumped transversely with short pulses are studied under a unified framework, which proves that such processes can efficiently generate entangled photon pairs with time anticorrelation and frequency correlation. Improvements ...

2005

Dynamics of optical injection of charge and spin currents in quantum wells

Benoît Marie Joseph Deveaud, Marc-André Dupertuis, Daniel Marti

We develop a dynamical theory for the optical injection of charge and spin current originating from the interferences between two coherent laser pulses of frequencies omega and 2omega. Multiband Bloch equations which include one- and two-photon interband t ...

American Physical Society2004

Spectral phase conjugation with cross-phase modulation compensation

Demetri Psaltis

Spectral phase conjugation with short pump pulses in a third-order nonlinear material is analyzed in depth. It is shown that if signal amplification is considered, the conversion efficiency can be significantly higher than previously considered, while the ...

2004

Femtosecond-irradiation-induced refractive-index changes and channel waveguiding in bulk Ti3+: Sapphire

René Salathé, Christian Depeursinge, Tristan Colomb

We have employed femtosecond laser writing in order to induce refractive- index changes and waveguides in Ti3+-doped sapphire. Doping the sapphire crystal with an appropriate ion significantly reduces the threshold for creating structural changes, thus e ...

2004

Femtosecond-irradiation-induced refractive-index changes and channel waveguiding in bulk Ti3+: Sapphire

René Salathé, Christian Depeursinge, Tristan Colomb

We have employed femtosecond laser writing in order to induce refractive-index changes and waveguides in Ti3+-doped sapphire. Doping the sapphire crystal with an appropriate ion significantly reduces the threshold for creating structural changes, thus enab ...

2004

Optical and structural characterization of self-organized stacked GaN/AlN quantum dots

Nicolas Grandjean

Self-organized GaN/AlN stacked quantum dots (QDs) have been studied by means of cathodoluminescence (CL), near field scanning optical microscopy (NSOM), photoluminescence, mu-Raman, and transmission electron microscopy. Assignment of the optical emissions ...

2004

Novel schemes for optical signal generation using laser injection locking with application to Brillouin sensing

Luc Thévenaz, Dario Alasia

Injection locking of two DFB semiconductors opens new possibilities to generate effective signals for optical sensing, in order to reach better performances. Pure wave forms can be generated with qualities exceeding those obtained using external modulators ...

Institute of Physics2004

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