“…Such conditions can satisfy: the lamp pumped Cr,Tm,Ho:YAG lasers, optical parametric oscillators (OPO's) pumped by high peak power Nd lasers [4,5], and developed in the last decade diode pumped lasers on Tm or Tm & Ho doped crystals [6][7][8] and hybrid lasers [9,10]. Because of quasi-three-level scheme, the conventional lamp pumped Cr,Tm,Ho:YAG lasers could operate only in pulse regime with low repetition rates not higher than few dozens of Hz.…”