Abstract: A system for using a pulsed laser beam to process materials includes a selector for varying the pulse repetition rate of the laser beam. Also included is a control unit for identifying an optimal pulse repetition rate that is compatible with the required pulse energy level for processing the material. Variations in the pulse repetition rate can be made during a procedure pursuant to either pre-programmed instructions, or in response to closed loop feedback controls.

Abstract: A device and method for steering a laser beam to a focal point in target tissue requires generating a laser beam. Diversions of the laser beam from a central beam path are minimized by a sequential arrangement of optical steering components. In order, the beam is first directed to the center of a z-scanning apparatus which will move the focal point in the medium in a z-direction. The beam is then passed to the center of a first galvanometric mirror which introduces focal point movements in the x-direction. A second galvanometric mirror then compensates for the x-direction movement by redirecting the beam to the center of a third galvanometric mirror where focal point movements in the y-direction are introduced.

Abstract: The invention relates to a method for treating an organic material, in particular a biological material, in which the organic material is irradiated with laser light in the form of ultrashort pulses at a defined energy input, which pulses are adjusted with regard to a respective pulse length and pulse energy for the organic material such that an energy density of from around 100 mJ/cm2 to around 100 J/cm2 is created, wherein at least two pulses or a pulse sequence are irradiated consecutively onto a surface of the organic material and wherein a time interval between a preceding pulse/pulse sequence and a following pulse/pulse sequence is less than or equal to picoseconds, and the following pulse/pulse sequence hits the organic material again where the change effected by means of the preceding pulse/pulse sequence has taken place, with the result that a permanent change in the organic material is created.