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Affolderbach, Christoph
Nom
Affolderbach, Christoph
Affiliation principale
Fonction
Collaborateur scientifique
Email
christoph.affolderbach@unine.ch
Identifiants
Résultat de la recherche
Voici les éléments 1 - 10 sur 11
- PublicationAccès libreLow-temperature indium-bonded alkali vapor cell for chip-scale atomic clocks(2013-11-9)
;Straessle, Rahel; ; ;Pétremand, Yves ;Briand, Danick; De Rooij, Nicolaas-F. - PublicationAccès libreA miniature frequency-stabilized VCSEL system emitting at 795nm based on LTCC modules(2013-11-8)
; ;Vecchio, Fabrizio; ;Pétremand, Yves ;De Rooij, Nicolaas-F. ;Maeder, Thomas - PublicationAccès libreMicrofabricated chip-scale rubidium plasma light source for miniature atomic clocks(2012-11-9)
;Venkatraman, Vinu ;Pétremand, Yves; ; ;De Rooij, Nicolaas-F.Shea, Herbert - PublicationAccès libreMicrofabricated rubidium vapour cell with a thick glass core for small-scale atomic clock applications(2012-11-9)
;Pétremand, Yves; ;Straessle, Rahel; ;Briand, Danick; De Rooij, Nicolaas-F. - PublicationAccès libreStudy of laser-pumped double-resonance clock signals using a microfabricated cell(2012-11-9)
; ; ;Pétremand, Yves ;De Rooij, Nicolaas-F. - PublicationAccès libreMicrofabricated rubidium vapour cell with a thick glass core for small-scale atomic clock applications
;Pétremand, Yves; ;Straessle, Rahel; ;Briand, Danick; de Rooij, Nicolaas F.This paper presents a new fabrication method to manufacture alkali reference cells having dimensions larger than standard micromachined cells and smaller than glass-blown ones, for use in compact atomic devices such as vapour-cell atomic clocks or magnetometers. The technology is based on anodic bonding of silicon and relatively thick glass wafers and fills a gap in cell sizes and technologies available up to now: on one side, microfabrication technologies with typical dimensions ≤ 2 mm and on the other side, classical glass-blowing technologies for typical dimensions of about 6–10 mm or larger. The fabrication process is described for cells containing atomic Rb and spectroscopic measurements (optical absorption spectrum and double resonance) are reported. The analysis of the bonding strength of our cells was performed and shows that the first anodic bonding steps exhibit higher bonding strengths than the later ones. The spectroscopic results show a good quality of the cells. From the double-resonance signals, we predict a clock stability of ≈3 × 10−11 at 1 s of integration time, which compares well to the performance of compact commercial Rb atomic clocks. - PublicationAccès libreMicrofabricated alkali vapor cell with anti-relaxation wall coating
;Straessle, Rahel; ; ;Pétremand, Yves ;Briand, Danick; de Rooij, Nicolas F.We present a microfabricated alkali vapor cell equipped with an anti-relaxation wall coating. The anti-relaxation coating used is octadecyltrichlorosilane and the cell was sealed by thin-film indium-bonding at a low temperature of 140 °C. The cell body is made of silicon and Pyrex and features a double-chamber design. Depolarizing properties due to liquid Rb droplets are avoided by confining the Rb droplets to one chamber only. Optical and microwave spectroscopy performed on this wallcoated cell are used to evaluate the cell’s relaxation properties and a potential gas contamination. Double-resonance signals obtained from the cell show an intrinsic linewidth that is significantly lower than the linewidth that would be expected in case the cell had no wall coating but only contained a buffer-gas contamination on the level measured by optical spectroscopy. Combined with further experimental evidence this proves the presence of a working anti-relaxation wall coating in the cell. Such cells are of interest for applications in miniature atomic clocks, magnetometers, and other quantum sensors. - PublicationAccès libreLow-temperature indium-bonded alkali vapor cell for chip-scale atomic clocks
;Straessle, Rahel ;Pellaton, Matthieu Lucien; ;Pétremand, Yves ;Briand, Danick; de Rooij, Nicolaas FA low-temperature sealing technique for micro-fabricated alkali vapor cells for chip-scale atomic clock applications is developed and evaluated. A thin-film indium bonding technique was used for sealing the cells at temperatures of ≤140 °C. These sealing temperatures are much lower than those reported for other approaches, and make the technique highly interesting for future micro-fabricated cells, using anti-relaxation wall coatings. Optical and microwave spectroscopy performed on first indium-bonded cells without wall coatings are used to evaluate the cleanliness of the process as well as a potential leak rate of the cells. Both measurements confirm a stable pressure inside the cell and therefore an excellent hermeticity of the indium bonding. The double-resonance measurements performed over several months show an upper limit for the leak rate of 1.5 × 10−13 mbar•l/s. This is in agreement with additional leak-rate measurements using a membrane deflection method on indium-bonded test structures. - PublicationAccès libreStudy of laser-pumped double-resonance clock signals using a microfabricated cell
; ; ;Pétremand, Yves ;de Rooij, Nicolaas F.We present our microwave spectroscopic studies on laser–microwave double-resonance (DR) signals obtained from a micro-fabricated Rb vapor cell. This study focuses on the characteristics and systematic shifts of the ground-state 'clock transition' in 87Rb ( - PublicationAccès libreA miniature frequency-stabilized VCSEL system emitting at 795 nm based on LTCC modules
; ;Vecchio, Fabrizio; ;Pétremand, Yves ;de Rooij, Nicolaas F ;Maeder, ThomasWe present a compact frequency-stabilized laser system locked to the Rubidium absorption line of a micro-fabricated reference cell. A printed circuit board (PCB) is used to carry all the components and part of the electronics, and low-temperature co-fired ceramic (LTCC) modules are used to temperature-stabilize the laser diode and the miniature Rubidium cell (cell inner dimensions: 5 mm diameter and 2 mm height). The measured frequency stability of the laser, in terms of Allan deviation, is ≤8×10−10 for integration times of 103–105s. The current overall dimensions of the system are 70×40×50 mm3, with good potential for realization of a frequency-stabilized laser module with few cm3 volume.