Publications by Alberto Nardi | EPFL Graph Search

An Ultra-Broadband Gallium Phosphide Optical Parametric Amplifier

Tobias Kippenberg, Alberto Nardi, Mikhail Churaev, Nikolai Kuznetsov, Alisa Davydova

Optical parametric amplification [1], which utilizes material nonlinearities, has long been considered one approach to increase channel capacity, but the technical complexity of systems using highly nonlinear fibers or bulk waveguides restricts their pract ...

IEEE2025

An ultra-broadband photonic-chip-based parametric amplifier

Tobias Kippenberg, Alberto Nardi, Mikhail Churaev, Nikolai Kuznetsov, Alisa Davydova

Optical amplification, crucial for modern communication, primarily relies on erbium-doped fibre amplifiers (EDFAs)1,2. Yet, EDFAs only cover a portion of the low-loss spectrum of optical fibres. This has motivated the development of amplifiers operating be ...

NATURE PORTFOLIO2025

Travelling-Wave Optical Parametric Amplification in Gallium Phosphide Integrated Waveguides

Tobias Kippenberg, Alberto Nardi, Mikhail Churaev, Nikolai Kuznetsov, Alisa Davydova

We demonstrate integrated optical continuous-travelling-wave parametric amplifiers that significantly surpass the amplification bandwidth of traditional Erbium-Doped Fiber Amplifiers. Using a 5.55-cm-long integrated gallium phosphide waveguide, we achieve ...

SPIE2024

An Integrated Gallium Phosphide Optical Parametric Amplifier

Tobias Kippenberg, Alberto Nardi, Mikhail Churaev, Nikolai Kuznetsov, Alisa Davydova

Optical parametric amplification is a promising alternative to traditional erbium-doped amplifiers, offering unidirectional, low-noise, and broadband amplification. Here we present an integrated continuous-traveling-wave parametric amplifier that surpasses ...

Springer Science and Business Media Deutschland GmbH2024

Broadband and high-gain traveling-wave optical parametric amplification in a gallium phosphide photonic integrated circuit

Tobias Kippenberg, Alberto Nardi, Nikolai Kuznetsov, Alisa Davydova

We demonstrate continuous-wave parametric amplifier w ith a 1 40 n m gain bandwidth spanning the optical S,C, and L-bands and up to 25 dB off-chip net-gain in a dispersion engineered gallium phosphide-on-insulator (GaPOI) waveguide with up to 160 mW output ...

Institute of Electrical and Electronics Engineers Inc.2024

Broadband and high-gain continuous-wave parametric amplification in a Gallium Phosphide waveguide

Tobias Kippenberg, Alberto Nardi, Mikhail Churaev, Nikolai Kuznetsov, Alisa Davydova

We demonstrate the first broadband and high gain third-order parametric optical amplifier in a 5.5 cm long GaP waveguide spiral with up to 25 dB net gain off-chip and more than 10 dB amplification over a bandwidth of 140 nm. ...

Institute of Electrical and Electronics Engineers Inc.2024

Integrated gallium phosphide nonlinear photonics

Alberto Nardi

This thesis investigates the potential of gallium phosphide (GaP) as a platform for advanced integrated photonic devices, leveraging its exceptional optical properties. Significant advantages over traditional materials like silicon nitride (Si3N4) are offe ...

EPFL2024

An Integrated Gallium Phosphide Travelling-Wave Optical Parametric Amplifier

Tobias Kippenberg, Alberto Nardi, Mikhail Churaev, Nikolai Kuznetsov, Alisa Davydova

We demonstrate optical continuous-travelling-wave parametric amplification in a 5.55-cm-long integrated gallium phosphide waveguide, achieving up to 35 dB of gain and significantly surpassing the bandwidth of erbium-doped fiber amplifiers. ...

Optical Society of America2024

Soliton Generation in a Gallium Phosphide Photonic-Crystal Fabry-Perot Microresonator

Tobias Kippenberg, Miles Henry Anderson, Alberto Nardi, Nikolai Kuznetsov, Alisa Davydova

Ring resonators have proven to be extremely successful for generation of temporal dissipative Kerr solitons, but their dispersion engineering is limited. We present a photonic-crystal Fabry-Perot resonator with record-high quality factors in gallium phosph ...

IEEE2023

Electron Emission Regimes of Planar Nano Vacuum Emitters

Marco Turchetti, Alberto Nardi, Yujia Yang

Recent advancements in nanofabrication have enabled the creation of vacuum electronic devices with nanoscale free-space gaps. These nanoelectronic devices promise the benefits of cold-field emission and transport through free space, such as high nonlineari ...

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC2022