Harmonic splitting of a passively mode-locked laser

摘要

The object of the present invention is to provide a passively mode-locked laser which can achieve mode-locking of higher harmonics, a pulse repetition rate being produced which is comparable with that of known actively mode-locked lasers, without the complex modulation methods which are typically connected with active techniques being required. Exemplary embodiments of the present invention relate to a passively mode-locked laser, in which mode locking is achieved by splitting of the laser resonator based on harmonics or overtones. According to the present invention, relatively high repetition rates can be achieved, ultrashort pulses being provided, without the complex modulation methods of the active techniques being required, and without the laser being susceptible to instabilities which are typically connected with passive techniques, high repetition rates being achieved with the use of cavity subresonators.