Publications related to Optics Laboratory

Particle-sorting fluidic device and methods for using thereof

Carlotta Guiducci, Gloria Porro, Kevin Keim

Device, system and method for sorting particles comprised into a fluid are disclosed that improve the current settings of deterministic lateral displacement (DLD)-based microfluidic devices, so to sort and detect small particles such as extracellular vesic ...

2022

Bounds on photon scattering

Denis Karateev, Kelian Philippe Häring, Marco Meineri, Aditya Hebbar

We study 2-to-2 scattering amplitudes of massless spin one particles in

d=4

space-time dimensions, like real world photons. We define a set of non-perturbative observables (Wilson coefficients) which describe these amplitudes at low energies. We use full ...

2022

Optical Diffraction Tomography Using Nearly In-Line Holography with a Broadband LED Source

Demetri Psaltis, Abhijit Roy, Ahmed Ayoub

We present optical tomography methods for a 3D refractive index reconstruction of weakly scattering objects using LED light sources. We are able to record holograms by minimizing the optical path difference between the signal and reference beams while sepa ...

MDPI2022

Experimental demonstration of dynamic spatiotemporal structured beams that simultaneously exhibit two orbital angular momenta by combining multiple frequency lines, each carrying multiple Laguerre-Gaussian modes

Tobias Kippenberg, Maxim Karpov, Zhe Zhao, Hao Song, Xinzhou Su

In general, there are different, relatively independent forms of orbital angular momenta at a given propagation distance, which might exhibit different dynamic spatial characteristics. One type involves a beam with a helical phase-front that rotates around ...

Optica Publishing Group2022

Temporal Talbot effect of optical dark pulse trains

Camille Sophie Brès, Jianqi Hu, Jiaye Wu

The temporal Talbot effect describes the periodic self-imaging of an optical pulse train along dispersive propagation. This is well studied in the context of bright pulse trains, where identical or multiplied pulse trains with uniform bright waveforms can ...

OPTICAL SOC AMER2022

A Photonic Integrated Circuit-Based Erbium-doped Waveguide Amplifier

Tobias Kippenberg, Rui Ning Wang, Xinru Ji, Zheru Qiu, Junqiu Liu, Yang Liu, Jijun He

We demonstrate an erbium-doped waveguide amplifier by erbium ion implantation in Si3N4 photonic integrated circuits, achieving 145 mW on-chip output power and more than 30 dB small-signal gain, which is on par with commercial fiber amplifiers and beyond st ...

IEEE2022

Lock-in amplified differential phase contrast

Christophe Moser, Timothé Laforest, Damien Claude-Marie Loterie, Chiara Bonati

We introduce a lock-in method to increase the phase contrast in incoherent Differential Phase Contrast (DPC) imaging. The use of a smart pixel detector with in-pixel signal demodulation, paired with synchronized illumination, provides the basis of a bit-ef ...

SPIE-INT SOC OPTICAL ENGINEERING2022

Tunability of space-time wave packet carrying tunable and dynamically changing OAM value

Tobias Kippenberg, Maxim Karpov, Hao Song, Xinzhou Su

Space-time (ST) wave packets have gained much interest due to their dynamic optical properties. Such wave packets can be generated by synthesizing frequency comb lines, each having multiple complex-weighted spatial modes, to carry dynamically changing orbi ...

Optica Publishing Group2022

Laser engraving device for multiple laser beams using a data link for adjusting the focusing position

Andreas Schueler, Luc Burnier

The present invention concerns a laser engraving device (1) for engraving a target surface (17). The laser engraving device (1) comprises: a beam splitter (7) for dividing a processing laser beam (25) into a plurality of engraving laser beams (27); a first ...

2022

We crave daylight – but not just to see

Marilyne Andersen

New insights into the psycho-physiological effects of (day)light on humans. How much do these effects matter in our indoor environment, wherein we spend 90% of our time nowadays? Through this talk, Marilyne Andersen establishes connections between architec ...

2022

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Particle-sorting fluidic device and methods for using thereof

Bounds on photon scattering

Optical Diffraction Tomography Using Nearly In-Line Holography with a Broadband LED Source

Experimental demonstration of dynamic spatiotemporal structured beams that simultaneously exhibit two orbital angular momenta by combining multiple frequency lines, each carrying multiple Laguerre-Gaussian modes

Temporal Talbot effect of optical dark pulse trains

A Photonic Integrated Circuit-Based Erbium-doped Waveguide Amplifier

Lock-in amplified differential phase contrast

Tunability of space-time wave packet carrying tunable and dynamically changing OAM value

Laser engraving device for multiple laser beams using a data link for adjusting the focusing position

We crave daylight – but not just to see

Bounds on photon scattering

Experimental demonstration of dynamic spatiotemporal structured beams that simultaneously exhibit two orbital angular momenta by combining multiple frequency lines, each carrying multiple Laguerre-Gaussian modes

A Photonic Integrated Circuit-Based Erbium-doped Waveguide Amplifier

Laser engraving device for multiple laser beams using a data link for adjusting the focusing position

Particle-sorting fluidic device and methods for using thereof

Temporal Talbot effect of optical dark pulse trains

Optical Diffraction Tomography Using Nearly In-Line Holography with a Broadband LED Source

Lock-in amplified differential phase contrast

Tunability of space-time wave packet carrying tunable and dynamically changing OAM value

We crave daylight – but not just to see