Tunable second harmonic generation from a Kerr-lens mode-locked Yb:YCa4O(BO3)3 femtosecond laser

Tunable second harmonic generation from a Kerr-lens mode-locked Yb:YCa₄O(BO₃)₃ femtosecond laser

Gao Zi-Ye^{1, 2, 5}, Zhu Jiang-Feng², Wu Zheng-Mao^{1, 5, †}, Wei Zhi-Yi^{3, ‡}, Yu Hao-Hai⁴, Zhang Huai-Jin⁴, Wang Ji-Yang⁴

(color online) The experimental setup of the diode-pumped Kerr-lens mode-locked Yb:YCOB femtosecond laser. LD: fiber-coupled diode laser; M1 and M2: plane-concave dichroic mirrors with ROC of 50 mm; HR: high reflection mirror; P1 and P2: SF6 prisms; OC: output coupler; H: pinhole. Right pictures are the beam profiles of the laser at CW and KLM operations and the green beam after M2.