标题：A dual-loss-modulated intra-cavity frequency-doubled Q-switched and mode-locked Nd:Lu_(0.15)Y_(0.85)VO_4/KTP green laser with a single-walled carbon nanotube saturable absorber and an acousto-optic modulator
作者：Zhang, G.;Zhao, S.;Yang, K.;Li, G.;Li, D.;Cheng, K.;Han, C.;Zhao, B.;Wang, Y.
作者机构：School of Information Science and Engineering, Shandong University, Jinan 250100, China;School of Information Science and Engine
来源：Journal of optics, A. Pure and applied optics: journal of the European Optical Society
关键词：dual-loss modulation;intra-cavity frequency doubled;Nd:Lu_(0.15)Y_(0.85)VO_4 crystal;QML;SWCNT-SA
摘要：By using both a single-walled carbon nanotube saturable absorber (SWCNT-SA) and an acousto-optic (AO) modulator, a dual-loss-modulated intra-cavity frequency-doubled Q-switched and mode-locked (QML) Nd:Lu_(0.15)Y _(0.85)VO_4/KTP (KTiOPO_4) green laser was demonstrated for the first time. The QML green laser characteristics such as the pulse width and single-pulse energy have been measured for different modulation frequencies of the AO modulator (f_p). In particular, in comparison with the solely passively QML green laser with an SWCNT-SA, the dual-loss-modulated QML green laser can generate a more stable pulse train, a shorter pulse width of the Q-switched envelope, a greater pulse energy and a higher average peak power. For the dual-loss-modulated QML green laser, at a pump power of 7.9W and a repetition rate of 10kHz, the pulse width and the pulse energy of the Q-switch envelope and the average peak power of the QML green laser are 50ns, 20.34μJ and 15.5kW, respectively, corresponding to a pulse width compression of 77%, a pulse energy improvement factor of six times and a QML peak power increase factor of 16 times when compared with those for the solely passively QML green laser. The experimental results show that the dual-loss modulation is an efficient method for the generation of a stable QML green laser with an SWCNT-SA.