A HYBRID LASER FOR GENERATING LASER PULSES ON DEMAND WITH CONSTANT ENERGY AND A METHOD OF GENERATING SAID PULSES

摘要

The present invention belongs to the field of constructional details of laser devices and laser devices for controlling intensity, frequency, duration, polarization or direction of emitted rays. The invention relates to a hybrid laser for generating laser pulses on demand, said pulses having constant energy, and to a method of generating laser pulses with constant energy using the said hybrid laser. The essence of the hybrid laser is in that it comprises at least one source of primary pulses, at least one source of idler pulses, at least two laser pulse amplifiers with different gain spectra and a pulse separator for separation of primary and idler pulses, where amplification stabilisation and thus constant energy of the primary pulses is ensured by adjusting the wavelength of the idler pulses so that the spectrum of idler pulses is moved away from the maximum of the gain of the second amplifier. Preferably the adjustment of the wavelength of the idler pulses is achieved by changing the temperature of the laser diode or by using an appropriate fibre Bragg grating to achieve the wavelength stabilization of the laser diode, or by using appropriate adjustable band pass filters in the laser resonator or with appropriate adjustable reflective elements in the laser resonator.