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Femtosecond pulse operation of a Tm,Ho-codoped crystalline laser near 2 μm

“…where is the laser wavelength, L g is the length of the gain medium, and A eff is the mode area in the laser crystal. The n 2 of Tm,Ho:KYW at 2055 nm was thus calculated to be 1.57ϫ 10 −16 cm 2 / W. Previously, the nonlinear refractive index of Yb 3+ : KYW was measured to be 8.7ϫ 10 −16 cm 2 / W at 1080 nm [22]. It is noteworthy to state that similar mode-locking parameters were obtained using an SESAM that had been ion implanted at a higher dosage level of 10 11 cm −2 .…”

Diode-pumped femtosecond Yb:KYW laser with compact three-element cavity

“…The Kerr-lens mode-locked Yb-lasers have so far been realised based on Yb:fluoride phosphate glass and Yb:KYW only. The nonliner refractive index n 2 of Yb:KYW was measured to be 8.7×10 -16 cm 2 /W [16], compared with the 3.2×10 -16 cm 2 /W of the Yb:glass and 3.1×10 -16 cm 2 /W of the Ti:sapphire. This indicates that Yb:KYW is a promising laser crystal for low-threshold and efficient KLM operation.…”

Efficient diode-pumped self-mode-locking Yb:LYSO laser

“…The self-modelocking approach of utilizing the thermal and nonlinear Kerr effects of the laser crystal could be a useful technique for achieving high-power mode-locked lasers, especially for lasers where the SESAM is not available. Recent researches have shown that Yb-doped tungstates are promising laser crystals for low-threshold and efficient KLM operation [13][14][15][16][17][18][19]. In this letter, for the first time to our knowledge, we report on a high-power self-modelocked Yb:LYSO laser.…”

“…Especially ytterbium-doped crystals have a broad absorption bands in the 900-980 nm range covered by high-power InGaAs commercial laser diodes, and typically exhibit a broad emission bandwidth. Considerable efforts have been made in demonstrating either tunable or mode-locking lasers [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16].…”