This type of fiber lasers integrated pulse-shaping technology called "Pulse-Tune" that is allowing pulse width and peak power to be programmed independently of the repetition rate. The pulse duration is controlled by using a range of preset waveforms (32 pre-programmed states) that can be chosen from laser control interface. Each of these waveforms is optimized based on the peak power for a specific frequency called Switching Frequency. In general, operating at frequencies below the optimized level for any waveform (i.e. below Switching Frequency) will result in the same specific pulse conditions of peak power, energy and duration, but with lower average power as a result of fewer pulses. On the other hand, operation at repetition rates higher than the optimal frequency maintains the average power, but the peak power and FWHM of pulse duration can decrease dramatically while pulse energy decreases linearly as a function of pulse frequency.

Dr. Islam Elnasharty, PhD in laser applications in metrology, environment, energy.