Improvement of the operation parameters for a Cr:LiSAF ultrashort-pulsed laser

Design and Development of the Folded 4-Mirror Resonators for Diode End-pumped Solid-State Cr:LiSAF Laser

“…The highest CW output power (31.8 mW), a 31.5 mW lasing threshold and 35.6 % slope efficiency were obtained using the 2 % output coupler. The laser characteristics are quite comparable with those reported to date [6][7][8][9]. Using the measured pump powers at threshold for several different output couplers with low transmission (0.46 %, 1 % and 2 %) a roundtrip cavity loss of 0.94 % was estimated with Findlay-Clay calculations [18].…”

“…. Among the diode-pumped solid-state laser media, the Cr:LiSAF has the broad gain bandwidth that supports laser emission continuously tunable from 750 to 1000 nm [2][3][4][5][6][7][8][9]. As a result of its absorption band red shifted to ∼ 670 nm, one Cr:LiSAF enables direct diode pumping with low-cost diode lasers, significantly reduces the total cost of the diode-pump laser system and beam quality depend strongly on the design of laser resonator.…”

“…As a result of its absorption band red shifted to ∼ 670 nm, one Cr:LiSAF enables direct diode pumping with low-cost diode lasers, significantly reduces the total cost of the diode-pump laser system and beam quality depend strongly on the design of laser resonator. Beside, the optimization of pumping power that is focused on the laser crystal, optimally c 2014 Vietnam Academy of Science and Technology designed resonator is required to achieve an extremely good mode matching (spatial overlap) between the pump beam and laser beam inside laser crystal [6,[10][11][12][13][14][15][16]. Therefore, the development of diode -pumped solid state lasers requires precise designs of laser resonator.…”