Stanislas, Rönnow, Bagard et Jadelot (une histoire de roi et de médecins dans la Lorraine du XVIIIème siècle)

NANCY1-SCD Medecine (545472101) / SudocPARIS-BIUM (751062103) / SudocSudocFranceF

La réimplantation intentionnelle

AIX-MARSEILLE2-BU Méd/Odontol. (130552103) / SudocPARIS-BIUM (751062103) / SudocSudocFranceF

Sculpture des Abelam de Papouasie-Nouvelle-Guinée

In June 2006, the Musée du Quai Branly acquired an exceptional piece of sculpture by the Abelam, a people who inhabit the Maprik region along the river Sepik in Papua-New Guinea. They are known for their extremely rich artistic production and for their very large ceremonial houses. The earliest studies of Abelam material culture led to the development of numerous concepts essential to the understanding of Oceanic Art and to the anthropology of art in general. The study of the iconography and nature of this piece allow us to reconsider some of these fundamental concepts. The acquisition of this polychrome work, finely sculpted on both sides, has significantly enriched the Oceanic collections of the Musée du Quai Branly

Optoelectronic phase-locked loop for millimeter-wave and THz beat note stabilization

International audienceA novel scheme based on opto-electronic down conversion is proposed and demonstrated to obtain an ultra-high spectral purity and tunable optical beat note in the GHz and millimeter wave range. An in-loop relative frequency stability better than 4 10-12 is reported. This approach opens the way to THz metrology

Beat note stabilization of a 10-60 GHz dual-polarization Nd:YAG microchip laser through optical down conversion

International audienc

Non-linear optoelectronic phase-locked loop for stabilization of opto-millimeter waves: towards a narrow linewidth tunable THz source.

International audienceWe propose an optoelectronic phase-locked loop concept which enables to stabilize optical beat notes at high frequencies in the mm-wave domain. It relies on the use of a nonlinear-response Mach-Zehnder modulator. This concept is demonstrated at 100 GHz using a two-axis dual-frequency laser turned into a voltage controlled oscillator by means of an intracavity electrooptic crystal. A relative frequency stability better than 10⁻¹¹ is reported. This approach of optoelectronic down conversion opens the way to the realization of continuously tunable ultra-narrow linewidth THz radiation

40-GHz Photonic Synthesizer Using a Dual-Polarization Microlaser

International audienceAn optically carried microwave synthesis working at 40 GHz is demonstrated by using a two-frequency solid-state microchip laser inserted as a voltage-controlled oscillator inside a digital phase-locked loop. We report an in-loop relative frequency stability better than 2.5 × 10-11. The capabilities of the synthesis are illustrated with different frequency sweeping formats

Opto-electronic Down Conversion: A Novel Approach for Optical Beat Note Stabilisation Up to the THz Domain

International audienc

Boucle à verrouillage de phase opto-électronique : vers la métrologie millimétrique et THz

National audienc