Trumpf Laser Gmbh

Aleksander Budnicki

Florian Jansen

Raphael Scelle

Alexander Killi

Stefan Baumbach

Rainer Flaig

Andreas Enzmann

Martin Liermann

Dominik Bauer

Dirk Sutter

Michael Scharun

Oliver Rapp

Daniel Glunk

Johannes Overbuschmann

A method for amplifying an ultrashort laser pulse includes: a) stretching the ultrashort laser pulse in time, b) amplifying the time-stretched laser pulse, c) compressing the amplified time-stretched laser pulse, with at least one gain phase contribution selected from a group consisting of a gain dynamics phase contribution of the laser pulse that emerges as a change in a nonlinear phase on account of gain dynamics in step b), a gain bandwidth phase contribution of the laser pulse that emerges as a change in the nonlinear phase on account of a gain bandwidth in step b), and a combination thereof, being compensated by virtue of d) an additional phase contribution being imparted on the laser pulse prior to step c) and/or e) a spectrum of the laser pulse being changed, in such a way that the at least one gain phase contribution is compensated after step c).

Method for amplifying an ultrashort laser pulse and method for designing an amplification system

An optical fiber unit includes an optical fiber. The optical fiber includes a light guiding region configured for guiding light through the optical fiber, an input coupling end having a first fiber end surface for coupling the light into the light guiding region, and an output coupling end having a second fiber end surface for coupling the light out of the light guiding region. The optical fiber unit further includes a first end piece arranged at one of the input coupling end and the output coupling end. The first end piece is configured to couple the light into the light guiding region or couple the light out of the light guiding region. The first end piece includes a reflection element configured to divert a portion of the light propagating along a direction of propagation through the light guiding region away from the direction of propagation.

Optical fiber unit, laser system comprising such an optical fiber unit, and method for evaluating an input coupling quality of the input coupling of useful light into such an optical fiber unit

A pulse compressor includes a plurality of optical components. The plurality of optical components includes a diffraction grating. A first optical component of the optical components is fastened to base plate by at least first and second intermediate elements that are laser-welded to one another. The first intermediate element is fastened to the base plate and the second intermediate element is fastened to the optical component. A joining surface of the first and second intermediate elements is formed as a bearing recess and another joining surface is curved. At least the laser-welded joining surfaces of the first optical component, the base plate, and the first and second intermediate elements are formed from materials for which a difference in their coefficients of thermal expansion is less than 10e-6/K.

Monolithic pulse compressor and associated adjustment method

A device for transporting pulsed laser radiation includes a pulse duration setting device configured for setting a transport pulse duration of the pulsed laser radiation. the device further includes a hollow core optical fiber having a hollow core surrounded by a material. The hollow core optical fiber is configured to be operated with beam path parameter values that are present at the first fiber end and lie in a target tolerance range. The device further includes a fiber input coupling device configured to couple the pulsed laser radiation into the hollow core optical fiber with the beam path parameter values that lie in the target tolerance range. the transport pulse duration is set so that input coupling of the pulsed laser radiation into the hollow core is provided for all of the beam path parameter values in the target tolerance range.

Device and method for transporting pulsed laser radiation with a hollow core optical fiber

In methods and devices for generating a laser pulse of an excitation laser that is actuated by a driver in response to a triggering time of a trigger signal, the driver actuation signal is generated taking into account the time interval between the triggering time and a preceding triggering time.

Methods for producing a laser pulse and devices for producing a driver control signal

The invention relates to dispersion adjustment units for electromagnetic radiation having a spectral width, e.g., for laser pulses. The dispersion adjustment unit includes at least one dispersive element for producing angular dispersion in an angular dispersion region limited by two interaction regions of the electromagnetic radiation with the at least one dispersive element. In the angular dispersion region, individual spectral components of the electromagnetic radiation are associated with optical paths extending at an angle to one another. Furthermore, the dispersion adjustment unit includes an optical unit that is arranged in the angular dispersion region and includes an optical element that transmits the electromagnetic radiation. The optical element effects an incidence-angle-dependent parallel offset of the individual spectral components of the electromagnetic radiation with respect to the propagation of the individual spectral components before and after the optical unit.

Dispersion adjustment units and methods of use

A fiber amplification system is provided for amplifying a laser pulse signal, e.g., an oscillator signal of an oscillator device. The fiber amplification system includes a fiber pre-amplification system having a short, fundamental-mode and step-index fiber configured to pre-amplify the laser pule signal to generate a seed signal and a main amplification system having a large core fiber configured to amplify the seed signal. The short, fundamental-mode step-index fiber can have a length no longer than about 30 cm, and a mode field diameter no less than about 30 &#x3bc;m, e.g., in a range from 30 &#x3bc;m to 60 &#x3bc;m, as well as a high doping concentration needed to provide an absorption length no more than about 30 cm, for providing the seed signal for the large core fiber with low non-linearity.

Ultra short pulse fiber pre-amplifier system for large-core fibers

Fiber mounting units for supporting an optical fiber for fiber laser systems are disclosed and include a base body having a fiber end attachment section, a fiber guide section, and a connection section arranged between the fiber end attachment section and the fiber guide section. The fiber end attachment section is adapted to attach a receiving element, which holds a fiber end portion of the optical fiber, the fiber guide section is adapted to guide a fiber central portion of the optical fiber, and the connection section is configured as a flexure bearing between the fiber end attachment section and the fiber guide section.

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Gundelfingen, Germany

Aleksander Budnicki