Publications by Tobias Kippenberg

Compact Superconducting Vacuum-gap Capacitors with Low Microwave Loss and High Mechanical Coherence for Scalable Quantum Circuits

Tobias Kippenberg, Amir Youssefi, Mahdi Chegnizadeh, Marco Scigliuzzo

Vacuum-gap capacitors have recently attracted significant interest in superconducting circuit platforms due to their compact design and exceptionally low dielectric losses in the microwave regime. Their intrinsic ability to support mechanical vibrational m ...

American Physical Society (APS)2025

Ultrafast Tunable Photonic Integrated Extended-DBR Pockels Laser

Tobias Kippenberg, Andrey Voloshin, Anat Siddharth, Zheru Qiu

Hybrid photonic integrated lasers have revolutionized laser technology by combining the scalable manufacturing of simple laser diodes with high-performance features such as frequency stability, opticallinewidth, and tuning linearity [1], traditionally only ...

IEEE2025

Motional Sideband Asymmetry of a Solid-State Mechanical Resonator at Room Temperature

Tobias Kippenberg, Nils Johan Engelsen, Alberto Beccari, Amirali Arabmoheghi, Guanhao Huang

The motional sideband asymmetry of a mechanical oscillator interacting with a laser field can be observed when approaching the quantum ground state, where the zero-point energy of the mechanical oscillator becomes a sizable contribution to its motion. In t ...

2025

Ultrafast tunable photonic-integrated extended-DBR Pockels laser

Tobias Kippenberg, Andrey Voloshin, Anat Siddharth, Zheru Qiu

Frequency-agile lasers that can simultaneously feature low noise characteristics and fast mode-hop-free frequency tuning are keystone components for applications ranging from LiDAR and distributed sensing to communication and quantum information processing ...

Nature Publishing Group2025

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

Coherent Dissipative Structures in Arbitrary Dispersion-Engineered Gallium Phosphide Fabry-Perot Resonators

Tobias Kippenberg, Nikolai Kuznetsov, Alisa Davydova

The diversity of experimentally observed nonlinear coherent and partially coherent optical structures, including breathing, zero-dispersion, and switching wave states in driven optical microresonators, is mainly provided by cavity dispersion engineering. R ...

IEEE2025

320 GHz photonic-electronic analogue-to-digital converter (ADC) exploiting Kerr soliton microcombs

Rui Ning Wang, Tobias Kippenberg

Kerr soliton microcombs have the potential to disrupt a variety of applications such as ultra-high-speed optical communications, ultra-fast distance measurements, massively parallel light detection and ranging (LiDAR) or high-resolution optical spectroscop ...

Springer Science and Business Media LLC2025

C- and L-band tunable integrated Erbium lasers via scalable manufacturing

Tobias Kippenberg, Grigorii Likhachev, Andrey Voloshin, Xinru Ji, Zheru Qiu

We demonstrate an integrated Erbium-based tunable laser using wafer-scale fabrication and ion implantation of silicon nitride photonic integrated circuits. We achieve single-frequency lasing tunable from 1530 nm to 1621 nm covering nearly the entire optica ...

Optica Publishing Group2025

Frequency Conversion in Periodically Poled Thin-Film Lithium Tantalate Photonic Integrated Circuits

Tobias Kippenberg, Nikolai Kuznetsov, Zihan Li

Second-order optical nonlinear processes, such as second harmonic generation, difference-frequency generation, or sum-frequency generation, find numerous applications in laser science, quantum technology, sensing, photonic computing, and many other areas. ...

IEEE2025

High-Energy Mode-Locked Pulses from a Photonic Integrated Mamyshev Oscillator

Tobias Kippenberg, Grigorii Likhachev, Jianqi Hu, Xinru Ji, Zheru Qiu, Zihan Li

Mode-locked lasers (MLLs), capable of generating ultrashort coherent pulses, have been instrumental for numerous applications, including optical frequency metrology, eye surgery, machining, additive manufacturing, imaging and spectroscopy. However, commerc ...

IEEE2025

Arrayed waveguide gratings in lithium tantalate integrated photonics

Tobias Kippenberg, Jianqi Hu

Arrayed waveguide gratings (AWGs) are widely used photonic components for splitting and combining different wavelengths of light. They play a key role in wavelength-division multiplexing (WDM) systems by enabling efficient routing of multiple data channels ...

Optica Publishing Group2025

Octave-Spanning Kerr Frequency Comb in a Si3N4 Microresonator at Electronically Detectable Repetition Rate

Tobias Kippenberg, Miles Henry Anderson, Zheru Qiu, Alisa Davydova

A key challenge in microresonator-based frequency combs has been achieving f-2f self-referencing, which requires a powerful, octave-spanning microcomb. Stable self-referenced combs have numerous applications including ultra-low-noise microwave generation a ...

IEEE2025

Piezo-Mems Tunable Ultra Low-Noise Laser

Rui Ning Wang, Tobias Kippenberg, Andrey Voloshin, Anat Siddharth, Andrea Bancora, Vladimir Shadymov

In this paper, we present the first ultra-low-noise, self-injection locked (SIL) laser with frequency agility based on the monolithic integration of a low-loss silicon nitride (Si3N4) photonic spiral cavity with an aluminum nitride (AlN) actuator. The self ...

IEEE2025

Oscillating Turing Rolls as Periodic Orbits of the Lugiato-Lefever Equation

Tobias Kippenberg, Tobias Schneider

The Lugiato-Lefever equation (LLE) is a fundamental nonlinear model of pattern formation in damped-driven optical Kerr cavities with applications ranging from fiber to chip-integrated optical resonators. In standard dimensionless form the LLE describes dyn ...

IEEE2025

Arrayed Waveguide Gratings on Integrated Thin-Film Lithium Tantalate

Tobias Kippenberg, Jianqi Hu

Arrayed Waveguide Gratings (AWGs) are ubiquitous and efficient photonic devices used to split and combine different wavelengths of light. They have been widely used as (de)-multiplexer for wavelength division multiplexed optical communication systems, and ...

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

Ultrahigh-quality-factor micro- and nanomechanical resonators using dissipation dilution

Tobias Kippenberg, Nils Johan Engelsen, Alberto Beccari

Mechanical resonators are widely used in sensors, transducers and optomechanical systems, where mechanical dissipation sets the ultimate limit to performance. Over the past 15 years, the quality factors in strained mechanical resonators have increased by f ...

Nature Portfolio2024

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

Silicon nitride waveguide or photonic integrated circuit fabrication method

Tobias Kippenberg, Xinru Ji

Silicon nitride waveguide fabrication method including providing a substrate including a stress release trench structure, the stress release recess structure being formed in a silicon oxide layer, depositing a silicon nitride material or layer onto the sil ...

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