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Christophe Moser

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Related publications (219)

Off-axis digital holographic camera for quantitative phase microscopy

Frédéric Montfort, Christian Depeursinge, Christophe Moser, Zahra Monemhaghdoust

We propose and experimentally demonstrate a digital holographic camera which can be attached to the camera port of a conventional microscope for obtaining digital holograms in a self-reference configuration, under short coherence illumination and in a sing ...

Optical Soc Amer2014

Self-tracking solar concentrator with an acceptance angle of 32 degrees

Volker Günter Zagolla, Christophe Moser, Eric Tremblay

Solar concentration has the potential to decrease the cost associated with solar cells by replacing the receiving surface aperture with cheaper optics that concentrate light onto a smaller cell aperture. However a mechanical tracker has to be added to the ...

Optical Society of America2014

Design and cost considerations for practical solar-hydrogen generators

Demetri Psaltis, Christophe Moser, Claudia Alejandra Rodriguez Medina, Miguel Antonio Modestino

Solar-hydrogen generation represents a promising alternative to fossil fuels for the large-scale implementation of a clean-fuel transportation infrastructure. A significant amount of research resources has been allocated to the development of photoelectroc ...

Royal Society of Chemistry2014

Curved Holographic Combiner for Color Head Worn Display

Arnaud Mader, Jürgen Brugger, Jonas Grossenbacher, Victor Javier Cadarso Busto, Seyedpayam Vahdati, Christophe Moser, Eric Tremblay

A volume hologram recorded with a lens array is proposed as a color transflective screen for Head Worn Display (HWD) systems. Design, fabrication as well as proof of concept are reported. Light from a single MEMS-based projector is efficiently diffracted t ...

Ieee-Inst Electrical Electronics Engineers Inc2014

Proof of principle demonstration of a self-tracking concentrator

Volker Günter Zagolla, Christophe Moser, Eric Tremblay

We present to the best of our knowledge the first successful demonstration of a planar, self-tracking solar concentrator system capable of a 2-dimensional angular acceptance of over 40 degrees. The light responsive mechanism allows for efficient waveguide ...

Optical Society of America2014

Self-tracking solar concentrator

Christophe Moser, Eric Tremblay

A system for capturing solar light of the sun, whereby the solar light comprises a short wavelength light component and a long wavelength light component. The system comprises at least a lens (101), a light- guide (102), and a self-adaptive coupling featur ...

2013

Full field vertical scanning in short coherence digital holographic microscope

Frédéric Montfort, Etienne Cuche, Christian Depeursinge, Christophe Moser

In Digital holography Microscopes (DHM) implemented in the so-called "off axis" configuration, the object and reference wave fronts are not co-planar but form an angle of a few degrees. This results into two main drawbacks. First, the contrast of the inter ...

Optical Soc Amer2013

Curved Transflective Holographic Screens for Head-Mounted Display

Arnaud Mader, Jürgen Brugger, Jonas Grossenbacher, Victor Javier Cadarso Busto, Seyedpayam Vahdati, Christophe Moser, Eric Tremblay

A volume hologram recorded with a lens array is proposed as a transflective screen for Head Worn Display (HWD) systems. Design, fabrication as well as proof of concept are reported. Light from a projection system, with similar properties to one mounted on ...

Spie-Int Soc Optical Engineering2013

Quantitative phase noise in a two-color low coherence Digital Holographic Microscope

Frédéric Montfort, Christian Depeursinge, Christophe Moser, Zahra Monemhaghdoust

In digital holographic microscopy (DHM), the long coherence length of laser light causes parasitic interferences due to multiple reflections in and by optical components in the optical path of the microscope and thus degrades the image quality. The parasit ...

Spie-Int Soc Optical Engineering2013

Self-tracking planar concentrator using a solar actuated phase-change mechanism

Volker Günter Zagolla, Christophe Moser, Damien Claude-Marie Loterie

In this paper we discuss optical considerations and present design simulation results for a self-tracking (passive) solar concentrator. The self-tracking mechanism uses a reversible in-plane paraffin thermal actuator to couple short-wavelength light into a ...

Spie-Int Soc Optical Engineering2013

Focused light delivery and all optical scanning from a multimode optical fiber using digital phase conjugation

Demetri Psaltis, Christophe Moser, Salma Farahi

We demonstrate a digital phase conjugation technique for generating a sharp focus point at the end of a multimode optical fiber. A sharp focus is experimentally obtained at the distal end of a 200 mu m core multimode fiber. By recording the digital hologra ...

Spie-Int Soc Optical Engineering2013

Dynamic bending compensation while focusing through a multimode fiber

Demetri Psaltis, David Ziegler, Christophe Moser, Salma Farahi

Multimode fiber endoscopes have recently been shown to provide sub-micrometer resolution, however, imaging through a multimode fiber is highly sensitive to bending. Here we describe the implementation of a coherent beacon source placed at the distal tip of ...

Optical Society of America2013

Optical-resolution photoacoustic microscopy by use of a multimode fiber

Demetri Psaltis, Christophe Moser, Salma Farahi, Emmanuel André Henri Bossy

We demonstrate Optical-Resolution Photoacoustic Microscopy (OR-PAM), where the optical field is focused and scanned using Digital Phase Conjugation through a multimode fiber. The focus is scanned across the field of view using digital means, and the acoust ...

American Institute of Physics2013

High-resolution, lensless endoscope based on digital scanning through a multimode optical fiber

Demetri Psaltis, Christophe Moser, Salma Farahi

We propose and experimentally demonstrate an ultra-thin rigid endoscope (450 mu m diameter) based on a passive multimode optical fiber. We use digital phase conjugation to overcome the modal scrambling of the fiber to tightly focus and scan the laser light ...

Optical Soc Amer2013

Increasing the imaging capabilities of multimode fibers by exploiting the properties of highly scattering media

Demetri Psaltis, Christophe Moser, Salma Farahi

We present a design that exploits the focusing properties of scattering media to increase the resolution and the working distance of multimode fiber (MMF)-based imaging devices. Placing a highly scattering medium in front of the distal tip of the MMF enabl ...

Optical Society of America2013

Light induced fluidic waveguide coupling

Volker Günter Zagolla, Christophe Moser, Eric Tremblay

We report on the development of an opto-fluidic waveguide coupling mechanism for planar solar concentration. This mechanism is self-adaptive and light-responsive to efficiently maintain waveguide coupling and concentration independent of incoming light's d ...

Optical Soc Amer2012

Focusing and scanning light through a multimode optical fiber using digital phase conjugation

Demetri Psaltis, Christophe Moser, Salma Farahi

We demonstrate for the first time to our knowledge a digital phase conjugation technique for generating a sharp focus point at the end of a multimode optical fiber. A sharp focus with a contrast of 1800 is experimentally obtained at the tip of a 105 mu m c ...

2012

Compact single mode tunable laser using a digital micromirror device

Christophe Moser

The wavelength tuning properties of a tunable external cavity laser based on multiplexed volume holographic gratings and a commercial micromirror device are reported. The 3x3x3 cm(3) laser exhibits single mode operation in single or multi colors between 77 ...

Optical Society of America2011

Dual wavelength full field imaging in low coherence digital holographic microscopy

Frédéric Montfort, Christian Depeursinge, Christophe Moser, Zahra Monemhaghdoust

A diffractive optical element (DOE) is presented to simultaneously manipulate the coherence plane tilt of a beam containing a plurality of discrete wavelengths. The DOE is inserted into the reference arm of an off-axis dual wavelength low coherence digital ...

Optical Society of America2011

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