Publications by Grigorii Likhachev

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

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

Photonic-electronic integrated circuit-based coherent LiDAR engine

Edoardo Charbon, Tobias Kippenberg, Grigorii Likhachev, Andrey Voloshin, Anton Lukashchuk, Halil Kerim Yildirim, Xinru Ji, Zheru Qiu, Andrea Bancora

Chip-scale integration is a key enabler for the deployment of photonic technologies. Coherent laser ranging or FMCW LiDAR, a perception technology that benefits from instantaneous velocity and distance detection, eye-safe operation, long-range, and immunit ...

Nature Portfolio2024

Method for operating a frequency agile tunable self-injection locking laser system and self-injection locking laser system

Tobias Kippenberg, Grigorii Likhachev, Anat Siddharth

The invention relates to a Method for operating a frequency agile tunable self-injection locking laser system being formed by a laser device coupled to at least one optical resonator, wherein a diode current of a laser diode of the laser device is controll ...

2023

Photonic assembly tunable via the pockels effect and method for use in frequency-modulated lidar

Tobias Kippenberg, Grigorii Likhachev, Viacheslav Snigirev

A photonic assembly, a laser setup comprising said photonic assembly and a method for performing frequency-modulated continuous-wave light detection and ranging using said laser setup are disclosed. The photonic assembly (1) comprises an active photonic ch ...

2023

Lithium-Niobate-Based Frequency-Agile Integrated Lasers

Rui Ning Wang, Tobias Kippenberg, Junqiu Liu, Grigorii Likhachev, Guanhao Huang, Mikhail Churaev, Anat Siddharth, Viacheslav Snigirev

We demonstrate narrow- linewidth ultrafast tunable integrated lasers based on heterogeneously integrated thin-film lithium niobate on ultra-low loss silicon nitride integrated photonic circuits. Using self-injection locking of a hybrid microresonator, we a ...

IEEE2022

Electrically tunable optical resonator on a chip for fast tunable integrated lasers

Tobias Kippenberg, Grigorii Likhachev, Anat Siddharth

The present invention relates to an electrically tunable photonic resonator device for a component having a fast and flat actuation response, comprising: - At least one optical waveguide with an optical interface for coupling in laser light, - At least one ...

2022

Slice-Less Optical Arbitrary Waveform Measurement (OAWM) in a Bandwidth of More Than 600 GHz

Tobias Kippenberg, Grigorii Likhachev

We demonstrate an optical arbitrary waveform measurement (OAWM) technique that exploits optical frequency combs as multi-wavelength local oscillators (LO) and that does not require any optical slicing filters. In a proof-of-concept experiment, we achieve r ...

IEEE2022

Near ultraviolet photonic integrated lasers based on silicon nitride

Nicolas Grandjean, Rui Ning Wang, Tobias Kippenberg, Camille Haller, Junqiu Liu, Grigorii Likhachev, Andrey Voloshin, Anat Siddharth

Low phase noise lasers based on the combination of III-V semiconductors and silicon photonics are well established in the near-infrared spectral regime. Recent advances in the development of low-loss silicon nitride-based photonic integrated resonators hav ...

AIP Publishing2022

320 GHz Analog-to-Digital Converter Exploiting Kerr Soliton Combs and Photonic-Electronic Spectral Stitching

Rui Ning Wang, Tobias Kippenberg, Junqiu Liu, Grigorii Likhachev, Anton Lukashchuk, Viacheslav Snigirev

We demonstrate a photonic-electronic analog-to-digital converter (ADC) offering a record-high acquisition bandwidth of 320 GHz. The system combines a high-speed electro-optic modulator with a Kerr comb for spectrally sliced coherent detection and is used f ...

IEEE2021

Fully self-contained turn-key soliton microcomb source

Rui Ning Wang, Tobias Kippenberg, John David Jost, Junqiu Liu, Grigorii Likhachev, Arslan Sajid Raja, Jijun He

We demonstrate a turn-key microcomb source based on 100 GHz Si3N4 ring microresonator. The device is fully optically and electronically integrated in a compact box, which runs by pushing one button. ...

IEEE2021

Measurement of Frequency Tuning Curves of Soliton Self-Injection Locking to a Nonlinear Microresonator

Tobias Kippenberg, Junqiu Liu, Grigorii Likhachev, Andrey Voloshin

Self-injection locking effect eliminates the need for bulky narrow-linewidth, tunable, continuous-wave laser for pumping of high-Q optical microresonators, utilizing bare laser diodes. Here we propose an experimental technique, which allows measuring the m ...

IEEE2020