Publication
High Power Blue-Violet Superluminescent Light Emitting Diodes with InGaN Quantum Wells
Related publications (32)
III-N blue-emitting epi-structures with high densities of dislocations: Fundamental mechanisms for efficiency improvement and applications
Since the dawn of humanity, human beings seeked to light their surroundings for their well-being, security and development. The efficiency of ancient lighting devices, e.g. oil lamps or candles, was in the order of 0.03-0.04% and jumped to 0.4-0.6% with th ...
EPFL2024Kramers Kronig detection of four 20 Gbaud 16-QAM channels using Kerr combs for a shared phase estimation
Tobias Kippenberg, Maxim Karpov, Martin Hubert Peter Pfeiffer, Arne Kordts, Fatemeh Alishahi, Ahmad Fallahpour
We experimentally demonstrate Kramers-Kronig detection of four 20 Gbaud 16-quadrature-amplitude-modulated (QAM) channels after 50 km fiber transmission using two soliton Kerr combs as signal sources and local oscillators. The estimated carrier phase at the ...
OPTICAL SOC AMER2020Elucidating the role of the InGaN UL in the efficiency of InGaN based light-emitting diodes
Blue III-nitride light-emitting diodes (LEDs) are widely used nowadays in solid-state lighting, as white light can be produced by combining yellow phosphors and blue LEDs. This technology has the advantage to have a higher luminous efficiency than incandes ...
EPFL2019III-Nitride Semiconductor Photonic Nanocavities on Silicon
Optical nanocavities enhance light-matter interaction due to their high quality factors (Q) and small modal volumes (V). The control of light-matter interaction lies at the heart of potential applications for integrated optical circuits, including optical ...
EPFL2018Determination of the radiance of cylindrical light diffusers: design of a one-axis charge-coupled device camera-based goniometer setup
Georges Wagnières, Matthieu Philippe Emmanuel Zellweger, Blaise Lovisa, Andreas Pitzschke, Jenny Bertholet
A one-axis charge-coupled device camera-based goniometer setup was developed to measure the three-dimensional radiance profile ( longitudinal, azimuthal, and polar) of cylindrical light diffusers in air and water. An algorithm was programmed to project the ...
Spie-Soc Photo-Optical Instrumentation Engineers2017Multimode fiber optical imaging using wavefront control
Optical microscopy enables us to observe at high resolution and with a large field of view objects otherwise invisible for the naked eye. This is why it is becoming a fundamental tool in biology and in diagnostics, where observation at cellular level can t ...
EPFL2017Curvature and shape distributed sensing using Brillouin scattering in multi-core fibers
Luc Thévenaz, Marcelo Alfonso Soto Hernandez, Zhiyong Zhao
Distributed curvature and shape sensing using Brillouin scattering in multi-core fiber (MCF) is presented for the first time to the best of our knowledge, by exploiting bend-dependent Brillouin frequency shift (BFS) in off-center cores. ...
Optical Society of America2016>25 Gbps direct modulation and data transmission with 1310 nm waveband wafer fused VCSELs
Elyahou Kapon, Alexandru Mereuta, Vladimir Iakovlev, Alexei Sirbu, Andrei Caliman
25 Gb/s transmission over 10 km of standard single mode fiber is demonstrated for 1300 nm wafer fused InP/GaAs VCSELs with increased strain in quantum wells and higher output coupling from the cavity. ...
Ieee2016Method and apparatus for a photoacoustic probe using a multimode fiber
Demetri Psaltis, Christophe Moser
This invention is a method and apparatus to pick up a photoacoustic signal purely via optical means and via an endoscope. The photoacoustic endoscope invention relies only on optical excitation and detection methods. A light focus spot generates a photoaco ...
2015Distributed phase birefringence measurements based on polarization correlation in phase-sensitive optical time-domain reflectometers
Luc Thévenaz, Marcelo Alfonso Soto Hernandez, Xin Lu
In this paper a technique to measure the distributed birefringence profile along optical fibers is proposed and experimentally validated. The method is based on the spectral correlation between two sets of orthogonally-polarized measurements acquired using ...
Optical Society of America2015