Publications by Grigorii Likhachev

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

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

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, Jianqi Hu, Xinru Ji, Zheru Qiu, Grigorii Likhachev, 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, Xinru Ji, Zheru Qiu, Grigorii Likhachev, Halil Kerim Yildirim, Andrea Bancora, Anton Lukashchuk, Andrey Voloshin

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, Anat Siddharth, Grigorii Likhachev

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, Viacheslav Snigirev, Grigorii Likhachev

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

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

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, Anat Siddharth, Grigorii Likhachev

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

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

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

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