采用结构简单、紧凑的直线腔设计，用单壁碳纳米管(SWCNT)为饱和吸收体，实现了激光二极管（LD）抽运Tm:YAP晶体的2 μm波段被动调Q和调Q锁模(QML)脉冲激光运转。当腔长为30 mm时，实现了稳定的2 μm被动调Q激光输出，抽运功率为8.64 W时，最大平均输出功率为507 mW，最高重复频率26.91 kHz，最窄脉宽262 ns，相应的单脉冲能量18.8 μJ。腔长增加到80 mm时，得到调Q锁模激光运转，最大平均输出功率和调Q包络脉冲的最高重复频率分别为387 mW和34.61 kHz，调Q包络下锁模脉冲的重复频率为1.87 GHz。

The carbon nanotube as a saturable absorber is used in the passively Q-switched and Q-switched mode-locking (QML) of a laser diode (LD) pumped Tm:YAP operating at 2 μm. As high as 507 mW average output power of Q-switched pulses laser is obtained with a pump power of 8.64 W at the cavity length of 30 mm. The maximum pulse energy, pulse width and pulse repetition frequency are 18.8 μJ, 262 ns and 26.91 kHz respectively. When the whole cavity length increases to 80 mm, the QML laser is obtained. The maximum average output power and the pulse repetition frequency of Q-switched envelope are 387 mW and 34.61 kHz, respectively, while the pulse repetition frequency of the mode locking is 1.87 GHz.