A non-invasive device for treatment of skin tissue using laser light, the device comprising: a light emission system for generating a first laser pulse and a subsequent second laser pulse at a predefined time delay (ΔT) after the first laser pulse, an optical system for focusing the first laser pulse and the second laser pulse into a focal spot at a treatment location inside the skin tissue, the first laser pulse having a first power density (W/cm 2) in the focal spot, a first pulse duration (ms) and a first pulse energy (mJ) for initiating a plasma in the skin tissue at the treatment location, the subsequent, second laser pulse having a second power density in the focal spot being lower than the first power density, a second pulse duration and a second pulse energy, characterized in that the first pulse duration is in a range between 1 and 1,000 picoseconds, the second pulse duration is at least 10 times longer than the first pulse duration and is in a range between 1 and 1,000 nanoseconds, the time delay (ΔT) is in a range between 1 nanosecond and 10 microseconds, the first pulse energy is in a range between 0.1 and 2 mJ, the second pulse energy is 10 to 100 times higher than the first pulse energy and is in a range between 1 and 200 mJ for sustaining or intensifying, by generating the second laser pulse at said predefined time delay after the first laser pulse, the plasma initiated by the first laser pulse by absorption of at least part of the energy of the second laser pulse by the plasma initiated by the first laser pulse to generate breakdown of the skin tissue in the treatment location, whereby the first laser pulse and the second laser pulse together generate Laser Induced Optical Breakdown at the treatment location. a light emission system for generating a first laser pulse and a subsequent second laser pulse at a predefined time delay (ΔT) after the first laser pulse, an optical system for focusing the first laser pulse and the second laser pulse into a focal spot at a treatment location inside the skin tissue, the first laser pulse having a first power density (W/cm 2) in the focal spot, a first pulse duration (ms) and a first pulse energy (mJ) for initiating a plasma in the skin tissue at the treatment location, the subsequent, second laser pulse having a second power density in the focal spot being lower than the first power density, a second pulse duration and a second pulse energy, characterized in that the first pulse duration is in a range between 1 and 1,000 picoseconds, the second pulse duration is at least 10 times longer than the first pulse duration and is in a range between 1 and 1,000 nanoseconds, the time delay (ΔT) is in a range between 1 nanosecond and 10 microseconds, the first pulse energy is in a range between 0.1 and 2 mJ, the second pulse energy is 10 to 100 times higher than the first pulse energy and is in a range between 1 and 200 mJ for sustaining or intensifying, by generating the second laser pulse at said predefined time delay after the first laser pulse, the plasma initiated by the first laser pulse by absorption of at least part of the energy of the second laser pulse by the plasma initiated by the first laser pulse to generate breakdown of the skin tissue in the treatment location, whereby the first laser pulse and the second laser pulse together generate Laser Induced Optical Breakdown at the treatment location.