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Johann Emmeram Riemensberger

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Related publications (77)

Page 4 of 4

Frequency-Agile Self-Injection-Locked Lasers With sub-100 Hz Linewidth based on In-Package Photonic Wire Bonds

Tobias Kippenberg, Johann Emmeram Riemensberger, Andrey Voloshin

We demonstrate frequency-agile self-injection-locked lasers that exploit photonic wire bonds for connecting piezo-tunable Si3N4 microresonators to DFB lasers. Our devices offer intrinsic linewidths below 100Hz along with highly linear frequency sweeping ov ...

Optical Society of America2023

Tunable optical reflector chip for external cavity laser

Tobias Kippenberg, Johann Emmeram Riemensberger, Anat Siddharth

An optical reflector chip (10) comprising a waveguide arrangement (11) configured to guide optical radiation and a modulation device (3). The waveguide arrangement (11) comprises a Bragg grating section (111), the Bragg grating section (111) comprising a p ...

2024

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

Tobias Kippenberg, Johann Emmeram Riemensberger, Mikhail Churaev, Nikolai Kuznetsov, Alisa Davydova, Alberto Nardi

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

An Ultra-Broadband Gallium Phosphide Optical Parametric Amplifier

Tobias Kippenberg, Johann Emmeram Riemensberger, Mikhail Churaev, Nikolai Kuznetsov, Alisa Davydova, Alberto Nardi

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

Frequency agile photonic integrated external cavity laser

Diego Aldo Julius Visani, Tobias Kippenberg, Rui Ning Wang, Johann Emmeram Riemensberger, Anat Siddharth, Andrey Voloshin, Viacheslav Snigirev, Andrea Bancora, Vladimir Shadymov

We demonstrate a Vernier ring laser with linear frequency tuning of 1.5 GHz at 100 kHz chirp rate and wavelength switching with 7 ns rise time and 75 nW power consumption using Si3N4 photonic chip with integrated PZT actuators. ...

Optical Society of America2023

A hertz-linewidth Erbium laser based on photonic integrated circuits

Tobias Kippenberg, Rui Ning Wang, Johann Emmeram Riemensberger, Zheru Qiu, Xinru Ji

We demonstrate a photonic integrated circuit-based Erbium laser by endowing an ultralow-loss silicon nitride integrated optical cavity with Erbium-based gain. The free-running laser achieves 50 Hz intrinsic linewidth, 17 mW output power, and 40 nm waveleng ...

Optical Society of America2023

An Integrated Gallium Phosphide Travelling-Wave Optical Parametric Amplifier

Tobias Kippenberg, Johann Emmeram Riemensberger, Mikhail Churaev, Nikolai Kuznetsov, Alisa Davydova, Alberto Nardi

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

Massively parallel coherent LiDAR using dissipative Kerr solitons

Tobias Kippenberg, Junqiu Liu, Maxim Karpov, Johann Emmeram Riemensberger, Erwan Guillaume Albert Lucas, Wenle Weng, Anton Lukashchuk

We demonstrate an architecture for massively parallel frequency-modulated continuous wave (FMCW) laser ranging (LiDAR) by transferring linear chirps of a single narrow linewidth laser onto all soliton comb teeth though generation of a dissipative Kerr soli ...

IEEE2020

High-yield, wafer-scale fabrication of ultralow-loss, dispersion-engineered silicon nitride photonic circuits

Tobias Kippenberg, Junqiu Liu, Rui Ning Wang, Johann Emmeram Riemensberger, Jijun He, Arslan Sajid Raja, Guanhao Huang, Nils Johan Engelsen

IEEE2021

Low-noise frequency-agile photonic integrated lasers for coherent ranging

Tobias Kippenberg, Junqiu Liu, Rui Ning Wang, Johann Emmeram Riemensberger, Wenle Weng, Jijun He, Anat Siddharth, Andrey Voloshin, Viacheslav Snigirev, Vladimir Shadymov

Stable and tunable integrated lasers are fundamental building blocks for applications from spectroscopy to imaging and communication. Here the authors present a narrow linewidth hybrid photonic integrated laser with low frequency noise and fast linear wave ...

Nature Portfolio2022

Time-continuous Travelling-Wave Optical Parametric Amplification in a Photonic Circuit

Tobias Kippenberg, Junqiu Liu, Rui Ning Wang, Johann Emmeram Riemensberger, Jijun He, Nikolai Kuznetsov

We demonstrate a traveling wave parametric amplifier in a photonic Si3N4 integrated spiral waveguide of 2.0 m length with footprint 3x5 mm. We achieve net gain of 7 dB on-chip and 2 dB fiberto-fiber in the optical C-band. (C) 2022 The Author(s) ...

IEEE2022

Megapixel per second hardware efficient LiDAR based on microcombs

Tobias Kippenberg, Junqiu Liu, Maxim Karpov, Johann Emmeram Riemensberger, Anton Lukashchuk

We show a novel architecture for massively parallel FMCW LiDAR based on multiheterodyne mixing of two triangular chirped soliton microcombs generated in integrated Si3N4 microresonators using a single laser source and a single coherent receiver. We demonst ...

IEEE2021

Low-Phase-Noise Frequency-Agile Hybrid Integrated Laser Offering Highly Linear Tuning for FMCW LiDAR

Tobias Kippenberg, Johann Emmeram Riemensberger, Andrey Voloshin

We demonstrate piezo-tunable hybrid integrated lasers offering linewidths below 100 Hz along with highly linear and fast frequency tuning. For a tuning range of 1 GHz, residual nonlinearities are below 0.07 %, allowing for 5 cm ranging precision in an FMCW ...

Institute of Electrical and Electronics Engineers Inc.2024

Dual chirped microcomb based parallel ranging at megapixel-line rates

Tobias Kippenberg, Junqiu Liu, Maxim Karpov, Johann Emmeram Riemensberger, Anton Lukashchuk

Photonic integrated systems can be harnessed for fast and efficient optical telecommunication and metrology technologies. Here the authors develop a dual-soliton microcomb technique for massively parallel coherent laser ranging that requires only a single ...

Nature Portfolio2022

Compact, Spatial-mode-interaction-free, Ultralow-loss, Nonlinear photonic integrated circuits

Tobias Kippenberg, Junqiu Liu, Rui Ning Wang, Johann Emmeram Riemensberger, Jijun He, Zheru Qiu, Xinru Ji

We implement Euler bends to build compact high-Q Si3N4 racetrack microresonators, featuring a small footprint of only 0.21 mm(2) for 19.8 GHz FSR. We demonstrate that these multi-mode microresonators can be operated in the single-mode regime and generate a ...

IEEE2022

Dispersion engineering with coupled microresonators for extended soliton microcomb control

Dmitrii Pidgaiko, Tobias Kippenberg, Johann Emmeram Riemensberger, Alexey Tikan, Aleksandr Tusnin

We investigate coupled-resonator dispersion engineering capabilities for con-trolling the shape of the soliton microcomb in real time. ...

Optical Society of America2023

Single-pixel massively parallel coherent LiDAR using on dual soliton microcombs

Tobias Kippenberg, Junqiu Liu, Maxim Karpov, Johann Emmeram Riemensberger, Anton Lukashchuk

IEEE2021