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René Salathé

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Related publications (32)

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

René Salathé, Horst Arthur 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

Polarization microscopy by use of digital holography: application to optical- fiber birefringence measurements

René Salathé, Hans Georg Limberger, Pierre Marquet, Christian Depeursinge, Tristan Colomb, Etienne Cuche, Florian Dürr

We present a digital holographic microscope that permits one to image polarization state. This technique results from the coupling of digital holographic microscopy and polarization digital holography. The interference between two orthogonally polarized re ...

2005

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

René Salathé, Horst Arthur Vogel, Fabrice Merenda, Johann Rohner

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

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

Jean-Philippe Thiran, René Salathé, Klaus Benedikt Schönenberger, Mario Andres Chavarria Varon, Hubert Lucien Blanchard, Sébastien Emmanuel Blanc

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

Multiple optical trapping in high gradient interference fringes

René Salathé, Fabrice Merenda, Johann Rohner

In biological investigations, many protocols using optical trapping call for the possibility to trap a large number of particles simultaneously. Interference fringes provide a solution for massively parallel micro-manipulation of mesoscopic objects. Concur ...

2006

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

Jean-Philippe Thiran, René Salathé, Klaus Benedikt Schönenberger, 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

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

René Salathé, Fabrice Merenda, Johann Rohner, 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

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

René Salathé, Fabrice Merenda

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

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

René Salathé, Guy Delacrétaz, Fabrice Merenda

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

René Salathé, Hans Georg Limberger, 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

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

Jan-Anders Edvin Maansson, René Salathé, Véronique Michaud, 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

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

René Salathé, Horst Arthur Vogel, Peter Ryser, 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

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

René Salathé, László Forró, Sylvia Jeney, Fabrice Merenda

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

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

René Salathé, Hans Georg Limberger, Yann Tissot-dit-Sanfin

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

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

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

In situ strain and temperature monitoring of adaptive composite material

René Salathé, Véronique Michaud, Hans Georg Limberger

An optical fiber sensor is designed to simultaneously measure strain and temperature in an adaptive composite material. The sensor is formed by splicing two fiber Bragg gratings (FBGs) close to each other, which are written in optical fibers with different ...

SAGE Publications2006

Parallel broadband fluorescent light source for optical coherence tomography

René Salathé, Theo Lasser, Stéphane Bourquin

We present a new light source for parallel Optical Coherence Tomography (OCT) based on multiple waveguides written in Ti:sapphire. Each channel can generate a spectrum of 174 nm bandwidth centered at 772 nm, with an optical power on sample of 30 mu W. A sy ...

2005

Miniaturized optical tweezers based on high-na micro-mirrors

René Salathé, Fabrice Merenda, Johann Rohner

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

Comparison between various types of multiple optical tweezers

René Salathé, Fabrice Merenda, Johann Rohner

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

Statistical study of optical trapping efficiency

Olivier Martin, René Salathé, Johann Rohner, Lina Huang

2007