Grigorii Likhachev

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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 controllable and wherein the optical resonator is controllable by controlling a piezo or an electro-optical actuator configured to apply a variation of the refractive index of the resonator material through mechanical stress or an electric displacement field, respectively, at least partially onto the at least one optical resonator depending on an actuation voltage, inducing a change in the effective optical path length of the at least one optical resonator, comprising the steps of: - Selecting a self-injection locking range among a plurality of self-injection locking ranges by varying a laser diode current and monitoring self-injection locking ranges, wherein self-injection locking ranges corresponding to current ranges in which self-injection locking occurs, wherein the self-injection locking corresponds to an optical feedback phase for back-reflected light from the optical resonator into the laser device, - setting the diode current from the current range of the selected self-injection locking mode; - determining a maximum tuning range of the actuation voltage in which self-injection locking is maintained; - operating the laser system with actuation voltages in a range depending on the determined tuning range.

2023

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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 chip (10), a photonic modulator chip (2) comprising a photonic circuit arrangement, and a tuning arrangement comprising a modulation element (33) having a thickness of 10 micrometers or less. The active photonic chip (10) and the photonic modulator chip (2) are optically coupled such, that injection radiation at an optical feedback wavelength is generated, which defines at least one optical lasing wavelength at which the optical radiation is emitted by the active photonic chip (10). The modulation element (33) is arranged such, that an actuation of the modulation element (33) tunes the optical feedback wavelength via the Pockels effect, such, that a tuning of the optical feedback wavelength entails a tuning of the optical lasing wavelength.

2023

Chargement

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 optical resonator including a waveguide being made of an optical resonator material, particularly Si3N4, wherein laser light coupled via the at least one optical waveguide is coupled into the at least one optical resonator, - At least one piezo actuator to apply mechanical stress at least partially onto the at least one optical resonator; wherein the at least one optical resonator, the at least one piezo actuator and the at least one optical waveguide are monolithically integrated on a common substrate of the photonic resonator device; - a mechanical mode suppression means configured to attenuate one or more mechanical modes of oscillation caused by an AC operation of the at least one piezo actuator.

2022

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