Vincent Billault
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View article: Time reversal of RF signals via cascaded time-to-frequency and frequency-to-time mapping in frequency-shifting loops
Time reversal of RF signals via cascaded time-to-frequency and frequency-to-time mapping in frequency-shifting loops Open
Time reversal of radio-frequency or microwave signals has important applications applications in telecommunications and electronic warfare. All-digital techniques are intrinsically limited in bandwidth by the speed of the converters, which…
View article: Evaluation of a photonic lantern spatial demultiplexer based receiver for optical communication
Evaluation of a photonic lantern spatial demultiplexer based receiver for optical communication Open
In this paper, we present a method based on a modal decomposition to quantify the efficiency of photonic lanterns (PL) based free space optical (FSO) communication receivers. We fabricate a seven port PL and we evaluate numerically the fre…
View article: Narrow linewidth III-V-on-SiN laser with extended frequency chirp capability based on micro-transfer printing for high resolution distributed acoustic sensing
Narrow linewidth III-V-on-SiN laser with extended frequency chirp capability based on micro-transfer printing for high resolution distributed acoustic sensing Open
A laser source that is both narrow-linewidth and frequency-agile is essential for FMCW applications, such as LIDAR or distributed optical fiber sensing (DOFS). In this work, we present the design and characterization of a laser architectur…
View article: III-V-on-Si<sub>3</sub>N<sub>4</sub> widely tunable narrow-linewidth laser based on micro-transfer printing
III-V-on-Si<sub>3</sub>N<sub>4</sub> widely tunable narrow-linewidth laser based on micro-transfer printing Open
Leveraging its superior waveguide properties, silicon-nitride ( Si 3 N 4 ) photonics is emerging to expand the applications of photonic integrated circuits to optical systems where bulk optics and fibers today still dominate. In order to f…
View article: The H2020 VERTIGO project : a major milestone towards optical feeder links
The H2020 VERTIGO project : a major milestone towards optical feeder links Open
Optical feeder links are considered as a promising alternative to surpass classical RF technology for future very high capacity systems. Nevertheless, the potential of this technology shall not conceal the remaining challenges to be overco…
View article: Evaluation of a multimode receiver with a photonic integrated combiner for satellite to ground optical communications
Evaluation of a multimode receiver with a photonic integrated combiner for satellite to ground optical communications Open
Multimode receivers based on spatial or modal diversity are promising architectures to mitigate in real time the atmospheric turbulence effects for free space optical (FSO) communications. In this paper, we evaluate and comment on the dyna…
View article: Free space optical communication receiver based on a spatial demultiplexer and a photonic integrated coherent combining circuit
Free space optical communication receiver based on a spatial demultiplexer and a photonic integrated coherent combining circuit Open
Atmospheric turbulence can generate scintillation or beam wandering phenomena that impairs free space optical (FSO) communication. In this paper, we propose and demonstrate a proof-of-concept FSO communication receiver based on a spatial d…
View article: The H2020 VERTIGO project towards tbit/s optical feeder links
The H2020 VERTIGO project towards tbit/s optical feeder links Open
To concurrently cope with the scarcity of RF frequency bands, the growing capacity demand and the required lower cost of the ground segment, Very High Throughput Satellites systems must rely on new technical solutions. Optical feeder links…
View article: All-optical coherent pulse compression for dynamic laser ranging using an acousto-optic dual comb
All-optical coherent pulse compression for dynamic laser ranging using an acousto-optic dual comb Open
We demonstrate a new and simple dynamic laser ranging platform based on analog all-optical coherent pulse compression of modulated optical waveforms. The technique employs a bidirectional acousto-optic frequency shifting loop, which provid…
View article: Phase Noise of Optical Pulse Trains Generated by Talbot Effect in Frequency Shifting Loops
Phase Noise of Optical Pulse Trains Generated by Talbot Effect in Frequency Shifting Loops Open
International audience
View article: Gain As Configurable Disorder-Adaptive Pumping for Control of Multimode Fiber Amplifiers and Lasers
Gain As Configurable Disorder-Adaptive Pumping for Control of Multimode Fiber Amplifiers and Lasers Open
Media featuring both optical gain and disorder, such as random lasers, represent formidable challenges as subjects of research due to the high complexity of the light propagation within them; however, dramatic advances in this nascent fiel…
View article: Wavefront Shaping of the Pump in Multimode Fiber Amplifiers; The Gain-Dependent Transmission Matrix
Wavefront Shaping of the Pump in Multimode Fiber Amplifiers; The Gain-Dependent Transmission Matrix Open
Wavefront shaping techniques allow the control of the transport of light through many types of scattering or complex media, among them multimode fibers. The case of a multimode fiber which is also a gain medium presents further intriguing …