Anton Lukashchuk

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Chaotic microcomb inertia-free parallel ranging

Tobias Kippenberg, Anton Lukashchuk, Anton Stroganov

Ever growing pixel acquisition rates in the fields of augmented reality, autonomous driving and robotics have increased interest in solid state beam scanning without moving parts. Modern photonic integrated laser ranging advances towards passive beam steering solutions. Recently demonstrated imagers based on focal plane arrays, nanophotonic metasurfaces, and optical phased arrays enable unprecedented pixel resolution and measurement speed. However, parallelization of >100 lasers and detectors - successfully implemented in commercial time-of-flight sensors - has not been widely adopted for passive scanning approaches. Here, we show both inertia-free and parallel light detection and ranging (LiDAR) with microresonator frequency combs. We used 40 independent channels of a continuously scanned microresonator frequency comb operated in the chaotic regime in combination with optical dispersive elements to perform random modulation LiDAR with 2D passive beam steering.

AIP Publishing2023

A method and a setup for light detection and ranging are disclosed. The setup is configured to carry out the following method: generating signal radiation (S) at multiple signal frequencies (fs) with an optical signal source (1), wherein the signal radiation (S) exhibits random signal modulations preferably at each of the multiple signal frequencies (fs), splitting the signal radiation (S) into a target radiation part (T) and a reference radiation part (R), directing the target radiation part (T) towards a target (2), detecting a target signal (IT), wherein the target signal is associated with a reflected portion (TR) of the target radiation part being reflected from the target (2), detecting a reference signal (IR), wherein the reference signal is associated with the reference radiation part (R), and deriving at least one ranging information parameter from the target signal (IT) and the reference signal (IR).

2023

A photonic integrated circuit-based erbium-doped amplifier

Jijun He, Xinru Ji, Tobias Kippenberg, Junqiu Liu, Yang Liu, Anton Lukashchuk, Zheru Qiu, Rui Ning Wang

Erbium-doped fiber amplifiers revolutionized long-haul optical communications and laser technology. Erbium ions could provide a basis for efficient optical amplification in photonic integrated circuits but their use remains impractical as a result of insufficient output power. We demonstrate a photonic integrated circuit-based erbium amplifier reaching 145 milliwatts of output power and more than 30 decibels of smallsignal gain-on par with commercial fiber amplifiers and surpassing state-of-the-art III-V heterogeneously integrated semiconductor amplifiers. We apply ion implantation to ultralow-loss silicon nitride (Si3N4) photonic integrated circuits, which are able to increase the soliton microcomb output power by 100 times, achieving power requirements for low-noise photonic microwave generation and wavelength-division multiplexing optical communications. Endowing Si3N4 photonic integrated circuits with gain enables the miniaturization of various fiber-based devices such as high-pulse-energy femtosecond mode-locked lasers.

AMER ASSOC ADVANCEMENT SCIENCE2022