Max-planck-gesellschaft Zur F&#xf6;rderung Der Wissenschaften E. V.

Ludwig-maximilians-universitaet Muenchen

Trumpf Laser Gmbh

Ludwig-Maximilians-Universitat München

Jonathan Brons

Oleg Pronin

Ferenc Krausz

Alexander Apolonskiy

Alexander Killi

Rainer Flaig

Dominik Bauer

Dirk Sutter

Ivo Zawischa

Jinwei Zhang

Marcus Seidel

Sebastian Groebmeyer

Maksim Iandulskii

Ka Fai Mak

Sebastian GRÖBMEYER

A multiple frequency comb source apparatus () for simultaneously creating a first laser pulse sequence representing a first frequency comb () and at least one further laser pulse sequence representing at least one further frequency comb (), wherein at least two of the first and at least one further pulse sequences have different repetition frequencies, comprises a laser resonator device () comprising multiple resonator mirrors including first end mirrors EM,OCproviding a first laser resonator (), a laser gain medium () being arranged in the laser resonator device (), and a pump device () being arranged for pumping the laser gain medium (), wherein the laser resonator device () is configured for creating the first and at least one further laser pulse sequences by pumping and passively mode-locking the laser gain medium (), the resonator mirrors of the laser resonator device () include further end mirrors EM, OCproviding at least one further laser resonator (), the first laser resonator () and the at least one further laser resonator () share the laser gain medium (), resonator modes of the first laser resonator () and the at least one further laser resonator () are displaced relative to each other, wherein the resonator modes are located in the laser gain medium () at separate beam path spots, and at least one of the first and further end mirrors EM, EM, OC, OCis adjustable so that the repetition frequency of at least one of the first and at least one further laser pulse sequences can be set independently from the repetition frequency of the other one of the first and at least one further laser pulse sequences. Furthermore, a spectroscopic measuring method, a spectroscopy apparatus and a multiple frequency comb generation method are described.

Apparatus and method for multiple frequency comb generation and applications thereof

A method for generating output laser pulses from input laser pulses includes causing the input laser pulses to temporally successively pass through an optical component with temperature-dependent power efficiency. The optical component is heated by the passing of the input laser pulses. The input laser pulses emerge from the optical component as output laser pulses. The method further includes calculating a current temperature or a current temperature difference of the optical component, or a temperature-dependent current parameter based on all preceding input laser pulses or output laser pulses that have contributed to the heating of the optical component, and setting a power of a current input laser pulse based on the calculated current temperature, or the calculated current temperature difference, or the calculated current parameter, so that an associated output laser pulse has a pulse energy that deviates from a predefined pulse energy by less than 5%.

Method and laser system for generating output laser pulses with an optical component with temperature-dependent power efficiency and associated computer program product

An apparatus for spectral broadening of laser pulses includes a main body, a plurality of mirror elements fastened to the main body, each having a mirror surface formed thereon and configured to reflect the laser pulses the plurality of mirror elements being fastened to a main body, and at least one nonlinear optical medium for the passage of the laser pulses for the generation of a nonlinear phase (Φ) by self-phase modulation. The at least one nonlinear optical medium may be a sheet-like and disk-shaped solid-state optical medium and/or a gaseous optical medium.

Apparatus for the spectral broadening of laser pulses and optical system

A laser device (), being configured for generating laser pulses by Ken lens based mode locking, comprises a laser resonator () with a plurality of resonator mirrors () spanning a resonator beam path (), a solid state gain medium () being arranged in the laser resonator (), a Kerr medium device () being arranged with a distance from the gain medium () in the laser resonator (), wherein the Kerr medium device () includes at least one Ken medium being arranged in a focal range of the resonator beam path and being configured for forming the laser pulses by the nonlinear Kerr effect, and a loss-modulation device () having a modulator medium, which is capable of modulating a power loss of the laser pulses generated in the laser resonator (), wherein the Kerr medium device () includes the modulator medium of the loss-modulation device () as the at least one Kerr medium having an optical non-linearity being adapted for both of creating the Kerr lens based mode-locking in the laser resonator and modulating the power loss in the laser resonator. Furthermore, a method of generating laser pulses by Kerr lens based mode locking is described, wherein a loss-modulation device () is used for both of introducing a Ken effect in the laser resonator () and modulating the power loss.

Device and method for generating laser pulses by Kerr lens based mode locking with a loss-modulation device as a Kerr medium

A pulse laser apparatus () for creating laser pulses (), in particular soliton laser pulses (), based on Kerr lens mode locking of a circulating light field in an oscillator cavity (), comprises at least two resonator mirrors (, . . . ) spanning a resonator beam path () of the oscillator cavity (), at least one Kerr-medium () for introducing self-phase modulation and self-focusing to the circulating light field in the oscillator cavity (), at least one gain-medium () for amplifying the circulating light field in the oscillator cavity (), and a tuning device () for setting a first mode-locking condition and a second mode-locking condition of the oscillator cavity () such that an intra-cavity threshold-power for mode-locking at the first mode-locking condition is lower than that at the second mode-locking condition, wherein the first mode-locking condition is adapted for starting or shutting-down of the Kerr lens mode locking and the second mode-locking condition is adapted for continuous Kerr lens mode locking and a resonator-internal peak-power of the circulating light field is higher at the second mode-locking condition than at the first mode-locking condition. Furthermore, a method of operating a pulse laser apparatus is described.

Pulse laser apparatus and method for Kerr lens mode locking based creation of laser pulses

A method of generating fs laser pulses (), includes steps of creating a circulating light field in a resonator cavity () with multiple resonator mirrors (-) by pumping at least one gain medium () included in the resonator cavity (), and passing the circulating light field through a first Kerr medium () included in the resonator cavity (), so that the fs laser pulses () are formed by self-amplitude modulation of the circulating light field, wherein the resonator cavity () includes at least one supplementary Kerr medium (-) enhancing the self-amplitude modulation of the circulating light field, and each of the first Kerr medium () and the at least one supplementary Kerr medium (-) provide different non-linear Kerr lens contributions to the self-amplitude modulation of the circulating light field. Laser pulse source apparatus () for generating fs laser pulses () is also described.

Method and laser pulse source apparatus for generating fs laser pulses

A laser device (), configured for generating laser pulses, has a laser resonator () with a gain disk medium () and a Kerr medium (). The laser resonator () includes a first mode shaping section () which is adapted for shaping a circulating electric field coupled into the gain disk medium (), and a second mode shaping section (), which is adapted for shaping the circulating electric field coupled into the Kerr medium () independently of the electric field shaping in the first mode shaping section (). Furthermore, a method of generating laser pulses () using a laser resonator () with a gain disk medium () and a Kerr medium () is described.

Laser device with Kerr effect based mode-locking and operation thereof

A method of controlling output pulses of a pulse laser device () including thin-disk laser medium (), in particular controlling a carrier-envelope phase and/or an intensity noise of the output pulses, includes pumping thin-disk laser medium () of pulse laser device () with multiple pump laser diodes (), having at least one modulated laser diode () powered by current source () with modulation capability, and controlling the output pulses by modulating the output power of the at least one modulated laser diode (), which is modulated by controlling a drive current thereof, wherein the pump laser diodes further include at least one stable laser diode (), having constant output power, and the output power of the at least one modulated laser diode () is smaller than the whole output power of the stable laser diode(s) (). A pulse laser device () is also described.

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Unterschleissheim, Germany

Jonathan Brons