A5076117750- Photonic and Optical Devices
- Advanced Fiber Laser Technologies
- Advanced Photonic Communication Systems
- Optical Network Technologies
- Semiconductor Lasers and Optical Devices
- Optical Wireless Communication Technologies
- Advanced Fiber Optic Sensors
- Orbital Angular Momentum in Optics
- Random lasers and scattering media
- Laser-Matter Interactions and Applications
- Photonic Crystal and Fiber Optics
- Adaptive optics and wavefront sensing
- Advanced MEMS and NEMS Technologies
- Quantum optics and atomic interactions
- Laser Material Processing Techniques
- Photorefractive and Nonlinear Optics
- Nonlinear Optical Materials Studies
- Acoustic Wave Resonator Technologies
- Silicon Nanostructures and Photoluminescence
- Satellite Communication Systems
- Advanced Optical Network Technologies
- Solid State Laser Technologies
- Photoacoustic and Ultrasonic Imaging
- Analytical Chemistry and Sensors
- Advanced Optical Sensing Technologies
Thales (France)
2018-2024
Thales (Australia)
2019-2024
Laboratoire Interdisciplinaire de Physique
2020-2021
Thales (Portugal)
2021
Université Grenoble Alpes
2021
Centre National de la Recherche Scientifique
2021
Laboratoire Kastler Brossel
2020
Laboratoire Albert Fert
2016
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 spatial demultiplexer photonic integrated circuit coherent combiner. The collects the light from several Hermite Gauss modes coherently combine chip energy different into single output. is characterized with wavefront emulator bench generates arbitrary phase intensity...
Highly efficient coherent beam combining (CBC) of two very-high-power optical amplifiers (VHPOA) with applications to long-range FSO communications such as ground-to-space feeder links is presented. The CBC setup designed minimize the telecom signal degradation, a polarization splitter used power fluctuations and control output state beam. system delivers 80 W proven be compatible 25 Gb/s signals less than 1 dB penalty.
In this paper, we present a method based on modal decomposition to quantify the efficiency of photonic lanterns (PLs) free space optical (FSO) communication receivers. We fabricate seven-port PL, and evaluate numerically fiber coupling reconstruction fields at PL FSO multimode port. validate numerical approach with an experimental characterization PL. Then compare commercial multiplane light converter spatial demultiplexer. The shows better for low-order modes orders magnitude demultiplexer...
To concurrently cope with the scarcity of RF frequency bands, growing capacity demand and required lower cost ground segment, Very High Throughput Satellites systems must rely on new technical solutions. Optical feeder links are considered as a promising alternative to surpass classical technology, offering assets inherent optical technologies (large bandwidth, no regulation, low beam divergence, components availability). Nevertheless potential this technology shall not conceal remaining...
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 bidirectional acousto-optic frequency shifting loop, which provides dual-comb photonic signal with an bandwidth in the microwave range. This architecture simply involves CW laser, standard telecom components low electronics, both for generation detection. As system, it offers range resolution few millimeters, set by...
In this paper, the proof-of-concept of an optical fiber sensing technique based on a frequency shifting loop (FSL) is proposed. The system combines both refreshing rate measurement in MHz range and centimetric spatial resolution. FSL used as versatile source broadband chirped waveforms, with controllable chirp rate. Digital pulse compression applied to optimize system's signal-to-noise-ratio. sensor monitor phase perturbation localized transducer (an electro-optic modulator) placed fiber. A...
We demonstrate a narrow-linewidth tunable laser through micro-transfer printing pre-fabricated III-V gain section on imec’s 200-mm Si/SiN platform. Lasing in distinct bands the C+L band is demonstrated, with linewidth down to 2.87-kHz.
We propose and demonstrate an improved Talbot laser including a regenerative RF feedback loop. This architecture greatly enhances both amplitude noise performances of the pulsed laser, while preserving broadband tunability its repetition rate. The phase power spectral density associated signal is found to be independent For 4.9 GHz rate, timing jitter as low 54 fs (integrated between 10 kHz 100 MHz offset frequency). paves way towards tunable high coupled opto-electronic microwave oscillators.
High repetition rate optical pulse trains are essential for a wide range of applications, including photonic-assisted sampling.Among the different solutions proposed so far, Talbot lasers, based on generation an frequency comb in shifting loop, simple yet efficient source short transform-limited pulses.By controlling spectral phase, is reconfigurable.It can be set to (possibly large) multiple spacing and reach GHz range, while only requiring low bandwidth synthesizer (typ.100 MHz).The noise...
Adaptive holographic interferometry is a promising method for high-sensitivity phase modulation measurements in the presence of slow perturbations from environment. This technique based on use nonlinear recombining medium. Here, we report an adaptive interferometer optically addressed spatial light modulator. Owing to physical mechanisms involved, adapts variations within range 5-10 Hz. Moreover, owing basic principle holography, this can be used with complex wave fronts such as speckled...
We report on a detailed analysis of the effect CW injection in an actively mode-locked laser at 780 nm, noise performances laser. The optical properties emitted pulse train, and phase amplitude RF train generated after photodetection have been characterized with respect to pumping rate, injected power. show that when injected, exhibits dramatic improvement both power spectrum, but expense degraded relative intensity noise.
The experimental assessment of a novel all-optical FSO communication receive device based on spatial mode demultiplexer and photonic integrated coherent combiner, is reported. collects light from the modes coupled into input multimode fiber coherently recombines these an output single-mode via binary-tree circuit. It was evaluated in transmission laboratory experiments featuring atmospheric propagation channel emulator. BER performance pre-amplified, OOK direct-detection receiver were...
In this paper, we present a method based on modal decomposition to quantify the efficiency of photonic lanterns (PL) free space optical (FSO) communication receivers. We fabricate seven port PL and evaluate numerically fiber coupling reconstruction fields at FSO multimode port. validate numerical approach with an experimental characterization PL. Then compare commercial multiplane light converter spatial demultiplexer. The shows better for low order modes orders magnitude demultiplexer size...
High power generation is an enabling technology for high capacity free space optical feeder links. We show the feasibility of transmission WDM OOK / DPSK at based on 50 W amplifiers and their coherent combination to deliver up 97 power.
Tunable lasers and photonic integrated circuits are a promising technology to provide compact high performance solutions for coherent remote sensing applications such as Lidar, distributed acoustic fiber (DAS). A hybrid tunable laser was fabricated within the EU funded INSPIRE project, based on micro-transfer printing of pre-fabricated InP gain section IMEC low-loss silicon nitride platform. By simultaneously modulating SOA current Vernier ring resonators, we demonstrate 20 GHz chirp...
An optical coherent transmission link with 100Watt output power is tested for satellite communications. Modulation formats are of the highest data-rates despite nonlinear amplifier impairments across a linear, low-SNR free-space link.
Leveraging its superior waveguide properties, silicon-nitride ( Si 3 N 4 ) photonics is emerging to expand the applications of photonic integrated circuits optical systems where bulk optics and fibers today still dominate. In order fully leverage advantages, heterogeneous integration III-V gain elements on one most critical steps. this paper, we demonstrate a III-V-on- widely tunable narrow-linewidth laser based micro-transfer printing. Detailed design considerations tolerant III-V-to-...
Mitigation of atmospheric turbulence is a major challenge in optical wireless communication, especially for feeder links. In this paper, we present free space (FSO) mode diversity receiver, based on spatial demultiplexer and silicon photonic coherent combiner to reduce the deleterious effects. We simulate light distribution ground receiver aperture use case consisting FSO link from GEO satellite. then generate experimentally wavefronts corresponding that with wavefront emulator, compare...
The understanding of frequency-shifting loops’ (FSLs) transient response is fundamental for their implementation in microwave photonic systems. We developed a numerical model, enabling us to describe the specific dynamics frequency comb generated FSL seeded by CW laser. based on laser rate equations, predicts temporal evolution power individual lines during on/off cycles injection power, FSLs operating below lasing threshold. To prove validity we performed experimental measurements with...
Media featuring both optical gain and disorder, such as random lasers, represent formidable challenges subjects of research due to the high complexity light propagation within them; however, dramatic advances in this nascent field have been furnished by paradigm applying wavefront shaping techniques beam pumping system. We present here a theoretical experimental study employing approach medium where disorder arises not from scattering but rather multimodality waveguide: an amplifying...