Patent ID: 8083731

Claim:
Apparatus for laser processing of a biological material, the apparatus comprising: a laser source arranged to emit in the direction of the biological material a train of laser radiation pulses having a pulse duration in the femtosecond range, the pulse train comprising a multiplicity of successive pulse groups, each pulse group of the multiplicity of successive pulse groups comprising at least two laser radiation pulses, wherein a first pulse of two successive laser radiation pulses of a pulse group has a lower energy than a second pulse of the two successive laser radiation pulses of the pulse group, and the laser source arranged to direct the laser radiation pulses of each pulse group of the multiplicity of pulse groups at substantially the same processing site of the material, but to direct the laser radiation pulses of successive pulse groups of the multiplicity of pulse groups at substantially different processing sites of the material, the time interval between two successive laser radiation pulses of each pulse group of the multiplicity of pulse groups being in the nanosecond range.