Method for generating a laser beam with short duration of less than 100 ns and high frequency of more than 50 kHz

摘要

The method involves predetermining coil diameter (D) of a laser fiber (2). The coil diameter is provided to a coil of the fiber such that frequency of fluctuations of laser power measured in a continuous mode is equal to or higher than modulation frequency. Quality factor of a cavity is maintained when a modulator (4) is inactive. Short duration laser pulses are generated with the modulation frequency. The modulator is controlled so that the modulation frequency of the modulator is less than or equal to the fluctuation frequency of the laser power. The fiber is doped with thulium, holmium, ytterbium, praseodymium, dysprosium, neodymium or erbium ions, phosphorus, germanium and aluminum ions.