Abstract: The invention relates to a highly repetitive laser system operating according to the reproducible amplifier principle. Said system comprises at least one amplified laser medium, a laser resonator provided with at least one resonator mirror and at least one modulator and a pump source, in particular, a laser diode source, which is used to pump the laser medium. The highly repetitive laser system is compact by virtue of the fact that a pulse extensor, having a highly dispersive effect as a result of the structure or material thereof, is integrated into the laser resonator.

Abstract: A high-repetition laser system for generating ultra-short pulses according to the principle of pulse decoupling is described. This is achieved by the use of an amplifying laser medium, a laser resonator with at least one resonator mirror and at least one pulse decoupling component, a saturable absorber mirror, and a pump source for pumping the laser medium wherein the pulse decoupling component is an electro-optical modulator.

Abstract: A high-repetition laser system for generating ultra-short pulses according to the principle of pulse decoupling is described. This is achieved by the use of an amplifying laser medium, a laser resonator with at least one resonator mirror and at least one pulse decoupling component, a saturable absorber mirror, and a pump source for pumping the laser medium wherein the pulse decoupling component is an electro-optical modulator.

Abstract: In a detection method for undesired double- or multiple-pulse states in an ultra-short-pulse laser system operated in the soliton regime and intended for generating femtosecond or picosecond pulses, comprising an amplifying laser medium for producing a laser emission, a laser resonator having at least one resonator mirror and a pump source, a first signal ? proportional to the pulse power P(t) or pulse energy averaged over the resonator cycle is measured for the laser emission. A second signal ? proportional to the square of the pulse power P(t), averaged over the resonator cycle, is measured for the laser emission, and the occurrence of a double- or multiple-pulse state is detected on the basis of a comparison of the measured signals ? and ?.

Abstract: In a detection method for undesired double- or multiple-pulse states in an ultra-short-pulse laser system operated in the soliton regime and intended for generating femtosecond or picosecond pulses, comprising an amplifying laser medium for producing a laser emission, a laser resonator having at least one resonator mirror and a pump source, a first signal ? proportional to the pulse power P(t) or pulse energy averaged over the resonator cycle is measured for the laser emission. A second signal ? proportional to the square of the pulse power P(t), averaged over the resonator cycle, is measured for the laser emission, and the occurrence of a double- or multiple-pulse state is detected on the basis of a comparison of the measured signals ? and ?.

Abstract: The invention relates to a high-repetition laser system for generating ultra-short pulses according to the principle of pulse decoupling according to the precharacterizing clause of claim 1 and a use of the laser system.

Abstract: The invention relates to a highly repetitive laser system operating according to the reproducible amplifier principle. Said system comprises at least one amplified laser medium, a laser resonator provided with at least one resonator mirror and at least one modulator and a pump source, in particular, a laser diode source, which is used to pump the laser medium. The highly repetitive laser system is compact by virtue of the fact that a pulse extensor, having a highly dispersive effect as a result of the structure or material thereof, is integrated into the laser resonator.

Abstract: The use of reflecting surfaces that are inclined towards one another enables the multiple reflection of a beam path to be achieved in a laser structure. This permits the realization of compact laser assemblies. The introduction of beam-influencing media between the reflective surfaces or the configuration of said reflective surfaces from or using media of this type allows the use of the multiple reflection for influencing parameters of the radiation or radiation field.

Abstract: The invention relates to a method and devices for pumping a laser, and to a laser element, which is specially designed therefor and which contains laser-active material. In order to prevent the laser-active material from being subjected to excessive thermal stress, particularly during a thin disk setup, an, in essence, elongated pumped light spot is irradiated onto a laser medium placed on a temperature sink whereby producing a two-dimensional heat flow. This achieves an improved cooling and a reduction of the maximum temperature.

Abstract: A diode pumped solid state laser for producing a high aspect ratio beam comprises a diode pumping array (1) on a diode array mount (3) and optical means for imaging a pump light beam onto a substantially asymmetrical spot with a smooth intensity profile. The pump light beam is pumping a laser medium (4). Both the pump and the lasing mode have strong asymmetries. In combination with the right choice of laser medium (4), this results in high power laser performance. The axis of the pump light beam is adjustable by a simple adjusting means (110) to a defined plane or direction relative to a mounting frame (111) of a diode array pumping device (103). The adjusting means (110) compensates small tolerances on mounting of the diode array (1) and/or at least one optical element (2). The adjusting means include at least one wedged window (127). Because of this adjustment the axis of the light beam lies in a defined plane relative to the mounting frame (111) of the pumping device (103).

Abstract: A pulse train generator for generating laser pulses comprises a laser setup with a cavity, an electro-optic switch for switching the pulses in and out from the cavity. The electro-optic switch and a control element are designed and connected for switching out laser pulses with a first repetition rate thereby forming a sequence of laser pulses. Said sequence of laser pulses is repeated with a second repetition rate, thereby forming a repeating sequence of laser pulses. A potential function with at least two steps or a switch setup with two electro-optic modulators are used to operate the setup with the second repetition rate.

Abstract: In a laser system with optical parametric amplifier (8), a laser source (1) for generating seed pulses, and a regenerative amplifier (2) for generating pump pulses, the seed pulses of laser source (1) are coupled, both into the regenerative amplifier (2) and into the optical parametric amplifier (8). Moreover, the auxiliary beam (HS) generated in the optical parametric amplifier (8) is passed through an arrangement with positive dispersion (14) so that, in view of the inverted chirp of the auxiliary beam (HS), the pulses are recompressed. A pulse stretcher can also be used as an arrangement with positive dispersion for recompression of the auxiliary beam (HS), so that a further component can be omitted.

Abstract: The solid state laser comprises a laser gain medium (1), pumping means for pumping the laser gain medium, and a laser cavity having a first end (3) and a second end (17), wherein the laser gain medium is at, or in the vicinity of, said first end (3) of said cavity. A semiconductor saturable absorber mirror (SESAM) can be placed at the second end (17) of the cavity. The laser gain medium can comprise at least one face for receiving pumping energy from the pumping means, the face being made reflective at a laser frequency of the laser, so that it can form the first end of the laser cavity. The resulting setup used for generating femtosecond laser pulses.

Abstract: By forming a laser element by embedding a laser-active medium in components of a heat-conducting crystalline material, an improved cooling effect can be achieved. As far as possible loss-free passage of the beam is achieved by a suitable orientation of interfaces and/or the use of antireflection coats or coatings.