Publications by René Salathé

X-ray imaging detector for radiological applications adapted to the context and requirements of low- and middle-income countries

Klaus Benedikt Schönenberger, Hubert Blanchard, René Salathé, Jean-Philippe Thiran, Romain Sahli, Sébastien Emmanuel Blanc, Mario Andres Chavarria Varon, Matthias Hüser, Jérôme Schmid

This paper describes the development of a novel medical x-ray imaging system adapted to the needs and constraints of low- and middle-income countries. The developed system is based on an indirect conversion chain: a scintillator plate produces visible ligh ...

2022

X-ray imaging detector for radiological applications in the harsh environments of low-income countries

Klaus Benedikt Schönenberger, René Salathé, Jean-Philippe Thiran, Mario Andres Chavarria Varon

This paper describes the development of a novel medical X-ray imaging system adapted to the needs and constraints of low and middle-income countries. The developed system is based on an indirect conversion chain: a scintillator plate produces visible light ...

2020

Crossed fiber optic Bessel beams for curvilinear optofluidic transport of dielectric particles

René Salathé, Fabrice Merenda, Kyunghwan Oh

Due to its unique non-diffracting and self-reconstructing nature, Bessel beams have been successfully adopted to trap multiple particles along the beam's axial direction. However, prior bulk-optic based Bessel beams have a fundamental form-factor limitatio ...

Optical Soc Amer2013

Microfluidic array cytometer based on refractive optical tweezers for parallel trapping, imaging and sorting of individual cells

René Salathé, Horst Vogel, Fabrice Merenda, Joachim Piguet, Michael Werner

Analysis of genetic and functional variability in populations of living cells requires experimental techniques capable of monitoring cellular processes such as cell signaling of many single cells in parallel while offering the possibility to sort interesti ...

Royal Society of Chemistry2011

Individual particle handling in a microfluidic system based on parallel laser trapping

René Salathé, Horst Vogel, Peter Ryser, Mathieu Grossenbacher, Michael Werner, Bastien Rachet

We present an optical trapping system combining individually addressable multiple laser traps with fluorescence spectroscopy. An in-line set of 64 near-IR laser diodes is used to create a line of individually addressable traps inside a microfluidic chip. T ...

Optical Society of America2011

High-resolution microscopy and photolithography devices using focusing micromirrors

René Salathé, Fabrice Merenda, Bastien Rachet

The invention relates to large-field high-resolution microscopy and photolithography setups operating with polychromatic light. It includes the use of a plurality of focusing micromirrors. ...

2010

Influence of Humidity and Temperature on Polymer Optical Fiber Bragg Gratings

Hans Georg Limberger, René Salathé, Nico Gérard Harbach

Water sorption of 100% changes the POFBG peak wavelength by 8.1 nm (at 1.54 micrometer). The temperature sensitivity depends on water content and is -10, -34, and -138 pm/K in dry, wet, and ambient conditions. ...

2010

Three-dimensional force measurements in optical tweezers formed with high-NA micromirrors

László Forró, René Salathé, Fabrice Merenda, Mathieu Grossenbacher, Sylvia Jeney

The three-dimensional trap stiffness of optical tweezers formed with high-NA micromirrors is investigated by back-focal-plane interferometry and power spectrum analysis. Normalized stiffness values of kappa(xy)/P-trap =1.2(mu N/m)/mW and kappa(z)/P-trap = ...

Optical Society of America2009

Miniaturized optical tweezers based on high-na micro-mirrors

René Salathé, Johann Rohner, Fabrice Merenda

The invention relates to an optical tweezer device including at least one light source (2) and one three-dimensional optical trap (9,10), said optical trap comprising one focusing micro-mirror (7) which is adapted to reflect and focus at least a portion of ...

2009

Experimental investigation of the effect of the mould thermal expansion on the development of internal stresses during carbon fibre composite processing

René Salathé, Véronique Michaud, Rodrigue Chatton, Sébastien Lavanchy

The influence of the mould material on the build-up of internal stresses during autoclave cure of carbon fibre composites was investigated using embedded optical fibre Bragg gratings. Unidirectional and cross-ply laminates were cured on four flat moulds: a ...

2008

Comparison between various types of multiple optical tweezers

René Salathé, Johann Rohner, Fabrice Merenda, Jean-Marc Fournier

Many types of optical tweezers arrays have been proposed and developed for use in conjunction with microfluidics for bio-chemical essays. Trap arrays rely on different methods allowing various degrees of flexibility and relative trapping efficiencies. Amon ...

Spie-Int Soc Optical Engineering2008

Refractive multiple optical tweezers for parallel biochemical analysis in micro-fluidics

René Salathé, Horst Vogel, Johann Rohner, Fabrice Merenda, Jean-Marc Fournier

We present a multiple laser tweezers system based on refractive optics. The system produces an array of 100 optical traps thanks to a refractive microlens array, whose focal plane is imaged into the focal plane of a high-NA microscope objective. This refra ...

2007

Micro-optics for optical trapping in microfluidics - art. no. 66440P

René Salathé, Johann Rohner, Fabrice Merenda, Jean-Marc Fournier, Elodie Lamothe

Micro-optical compo nents offer several possibilities for creating large matrices of optical traps, either when working on inverted microscopes, or by directly integrating miniaturized optical components at the level of a micro-fluidic chip. In thisarticle ...

2007

Miniaturized optical tweezer array with an array of reflective elements for reflecting the light back to a focal area

Guy Delacrétaz, René Salathé, Fabrice Merenda, Gerben Boer

Apparatus for forming a single or a plurality of threedimensional optical traps, the apparatus comprising: a. A collimated light source that is directed onto an array of focalizing refractive or diffractive elements providing a single or a plurality of foc ...

2007

Light-controlled reconfigurable fiber bragg gratings written in attenuation fiber

Hans Georg Limberger, René Salathé, Rodrigue Chatton, Yari Luchessa, Dragan Coric

A novel type of light controlled fiber Bragg gratings written in attenuation fiber is demonstrated. The spectral reconfiguration can be controlled by the pump power, the pumping configuration, the grating position and the fiber attenuation. © Optical Socie ...

Institute of Electrical and Electronics Engineers Computer Society2007

Ultrawide bandwidth wavelength monitor based on a pair of tilted fiber Bragg gratings

Hans Georg Limberger, René Salathé

A wavelength monitor based on a pair of tilted fiber Bragg gratings is reported. The monitor exhibits a subpicometer wavelength selectivity over a broad wavelength range (> 30 nm), and a low insertion loss (< 1 dB) for laser light with polarization matchin ...

Institute of Electrical and Electronics Engineers2007

Combining multiple optical trapping with microflow manipulation for the rapid bioanalytics on microparticles in a chip

Guy Delacrétaz, René Salathé, Philippe Renaud, Johann Rohner, Fabrice Merenda, Gerben Boer

An array of four independent laser traps is combined with a polydimethylsiloxane microfluidic chip to form a very compact system allowing parallel processing of biological objects. Strong three dimensional trapping allows holding objects such as functional ...

American Institute of Physics2007

Low loss wavelength monitor with sub-picometer resolution based on tilted fiber gratings

Hans Georg Limberger, René Salathé

A wavelength monitor based on a pair of tilted fiber Bragg gratings with low insertion loss (<1 dB) and sub-picometer wavelength resolution is reported. ...

IEEE2007

Lu, Gd codoped KY(WO4)(2): Yb epitaxial layers: towards integrated optics based on KY(WO4)(2)

René Salathé, Yaroslav Romanyuk, Camelia Borca

2007

UV induced fiber Bragg gratings (FBG) written in fully polymerized polymer optical fibers (POF)

Hans Georg Limberger, René Salathé, Nico Gérard Harbach

2007