Publications by Camille Sophie Brès

Multi-octave bandwidth supercontinuum generation in crystalline Aluminum Nitride-on-sapphire waveguides

Jean-François Carlin, Nicolas Grandjean, Raphaël Butté, Camille Sophie Brès

Applications such as optical clocks, gas spectroscopy, and optical coherent tomography stand to benefit significantly from the integration of on-chip supercontinuum sources. Materials exhibiting both second- and third-order nonlinearities are particularly ...

International Society for Optical Engineering2025

On the influence of the buffer layer on the optical quality of AlN-on-sapphire epilayers for photonic integrated devices

Jean-François Carlin, Nicolas Grandjean, Raphaël Butté, Camille Sophie Brès

In the last decade, aluminum nitride (AlN) has proven to be an attractive material for both linear and nonlinear integrated photonics, due to its large transparency window, its low propagation losses and the presence of both second- and third-order nonline ...

SPIE2025

Ultrabroadband milliwatt-level resonant frequency doubling on a chip

Camille Sophie Brès, Marco Clementi, Ji Zhou

Microresonators are powerful tools to enhance the efficiency of second-order nonlinear optical processes, such as second-harmonic generation, which can coherently bridge octave-spaced spectral bands. However, dispersion constraints such as phase-matching a ...

Springer Science and Business Media LLC2025

Self-organized spatiotemporal quasi-phase-matching in microresonators

Camille Sophie Brès, Jianqi Hu, Anton Stroganov, Edgars Nitiss, Ozan Yakar, Marco Clementi, Ji Zhou

Quasi-phase-matching (QPM) is a widely adopted technique for mitigating stringent momentum conservation in nonlinear optical processes such as second-harmonic generation (SHG). It effectively compensates for the phase velocity mismatch between optical harm ...

Springer Science and Business Media LLC2025

Monolithic silicon nitride electro-optic modulator enabled by optically-assisted poling

Camille Sophie Brès, Boris Zabelich, Christian André Clément Lafforgue

Electro-optic (EO) modulation is a key functionality to have on-chip. However, achieving a notable linear EO effect in stoichiometric silicon nitride has been a persistent challenge due to the material's intrinsic properties. Recent advancements revealed t ...

NATURE PORTFOLIO2025

Bridging the Mode-Locked and Q-Switched Regimes in Fiber Lasers

Camille Sophie Brès, Jiaye Wu, Gang Wang

Mode-locking and Q-switching are two widely used pulsing techniques based on different mechanisms. In practice, both lasing regimes can be realized within the same laser system, while the current research on their transition dynamics presents challenges in ...

WILEY-V C H VERLAG GMBH2025

Ultrabroadband tunable difference frequency generation in a standardized thin-film lithium niobate platform

Camille Sophie Brès, Christian André Clément Lafforgue, Yesim Koyaz

Thin-film lithium niobate (TFLN) on an insulator is a promising platform for nonlinear photonic integrated circuits (PICs) due to its strong light confinement, high second-order nonlinearity, and flexible quasi-phase-matching for three-wave mixing processe ...

2024

Observation of modulation instability in a coherently driven active fiber ring resonator at 2 µm wavelength

Camille Sophie Brès, Moritz Bartnick

We report the first, to our knowledge, observation of the nonlinear phenomenon known as modulation instability (MI) in a coherently driven fiber resonator pumped at 1972 nm. To compensate for the very high losses in this spectral region, we have integrated ...

2024

Electric-field poling of a silicon nitride microring resonator for linear electro-optic modulation

Camille Sophie Brès, Edgars Nitiss, Boris Zabelich, Christian André Clément Lafforgue

The centrosymmetric structure of stoichiometric silicon nitride inhibits the realization of second-order nonlinear processes in this low-loss, complementary-metal-oxide-semiconductor fabrication-compatible platform. Nevertheless, linear electro-optic modul ...

SPIE2024

Optically assisted electrical poling of silicon nitride integrated resonators

Camille Sophie Brès, Boris Zabelich, Christian André Clément Lafforgue

We demonstrate the linear electro-optic effect in a silicon nitride micro-ring in which an effective second order nonlinearity is enabled by optically assisted electrical poling. Charge carriers' separation in the waveguide creates a permanent electric-fie ...

Institute of Electrical and Electronics Engineers Inc.2024

UV, visible and near-infrared light generation through cascaded nonlinear processes in silicon-nitride microring resonators pumped at telecom wavelength

Tobias Kippenberg, Camille Sophie Brès, Junqiu Liu, Boris Zabelich, Marco Clementi

On-chip coherent light generation has wide-ranging applications in metrology, spectroscopy, quantum optics, etc. In this study, we demonstrate the generation of coherent light from a silicon-nitride microring resonator using cascaded nonlinear processes. T ...

SPIE2024

Dissipative Kerr soliton generation at 2μm in a silicon nitride microresonator

Camille Sophie Brès, Anton Stroganov, Ozan Yakar, Marco Clementi, Christian André Clément Lafforgue, Anamika Nair Karunakaran

Chip -scale optical frequency combs enable the generation of highly -coherent pulsed light at gigahertz-level repetition rates, with potential technological impact ranging from telecommunications to sensing and spectroscopy. In combination with techniques ...

Optica Publishing Group2024

Spatiotemporal Quasi-Phase-Matching in Microresonators

Camille Sophie Brès, Jianqi Hu, Edgars Nitiss, Ozan Yakar, Marco Clementi, Ji Zhou

We show how spatiotemporal quasi-phase-matching emerges from all-optical poling of silicon nitride microresonators. Enabled by the coherent photogalvanic effect, the photoinduced χ(2) grating oscillates in space and time, yielding quasi-phase-matched and D ...

Institute of Electrical and Electronics Engineers Inc.2024

Thermo-optic epsilon-near-zero effects

Camille Sophie Brès, Qian Li, Jiaye Wu, Marco Clementi

Nonlinear epsilon-near-zero (ENZ) nanodevices featuring vanishing permittivity and CMOS-compatibility are attractive solutions for large-scale-integrated systems-on-chips. Such confined systems with unavoidable heat generation impose critical challenges fo ...

Nature Portfolio2024

Versatile and Efficient Dual-Range Frequency Shifts by Intracavity Epsilon-Near-Zero Nanolayers

Camille Sophie Brès, Jiaye Wu, Marco Clementi, Ji Zhou

We experimentally demonstrate for the first time, the efficient input-dependent dual-range frequency shifts of 279.73 GHz and 3.63 THz in a mode-locked fiber laser with an intracavity epsilon-near-zero element. Real-time observation reveals that the presen ...

Institute of Electrical and Electronics Engineers Inc.2024

Intracavity Epsilon-Near-Zero Dual-Range Frequency Switch

Camille Sophie Brès, Jiaye Wu, Marco Clementi, Ji Zhou

Epsilon-near-zero (ENZ) nanophotonic devices with zero permittivity are known to exhibit adiabatic frequency translation via temporal refraction under extracavity excitation by intense light sources, which are however hard to integrate on-chip owing to a h ...

2024

Second-Harmonic Generation via All-Optical Poling in Linearly Uncoupled Silicon Nitride Microresonators

Camille Sophie Brès, Marco Clementi, Ji Zhou

We present a novel device consisting of two microring resonators coupled by the second-order nonlinear interaction. By independently controlling the microresonators' linear properties, we engineer efficient second-harmonic generation through photo-induced ...

Institute of Electrical and Electronics Engineers Inc.2024

Design rules for frequency conversion in periodically poled thin film lithium niobate waveguides

Camille Sophie Brès, Davide Grassani, Hamed Sattari, Nikolay Balakleyskiy, Christian André Clément Lafforgue, Yesim Koyaz

SPIE Society of Photo-Optical Instrumentation Engineers2024

Broadband difference frequency generation in periodically-poled thin-film lithium niobate

Camille Sophie Brès, Christian André Clément Lafforgue, Yesim Koyaz

We demonstrate broadband difference frequency generation by dispersion engineering in periodically-poled thin-film lithium niobate waveguides. In simulations, we show tunable signal bandwidth from 30 nm to 300 nm. Experimentally, we achieve idler generatio ...

Institute of Electrical and Electronics Engineers Inc.2024

Silicon nitride electric-field poled microresonator modulator

Camille Sophie Brès, Anton Stroganov, Edgars Nitiss, Boris Zabelich, Christian André Clément Lafforgue

Stoichiometric silicon nitride is a highly regarded platform for its favorable attributes, such as low propagation loss and compatibility with complementary metal-oxide-semiconductor technology, making it a prominent choice for various linear and nonlinear ...

2024