本文报道了一种2.07 μm 波段可调谐主动锁模光纤激光并在室内模拟大气湍流条件下进行传输特性研究。增益介质为1.5 m 长的掺钬光纤，主动锁模通过LiNbO3 强度调制器在腔内引入周期强度调制实现。腔内引入非线性偏振旋转效应实现波长2058.4 nm~2078.6 nm 可调谐。实验获得了稳定的基频锁模脉冲和10 阶，24 阶，48 阶谐波锁模脉冲，对应频谱信噪比为66.79 dB、61.37 dB、54.82 dB 和49.66 dB。锁模脉冲经过数字调制后在实验室内大气湍流模拟池中进行传输，分别获得了ΔT 为70 ℃，140 ℃和210 ℃时三种湍流强度和背对背条件下的眼图；与背对背条件相比，在ΔT=210 ℃时光信噪比降低了9.14 dB。

We demonstrate an actively mode-locked holmium-doped fiber laser with a central wavelength of 2.07 μm, and the propagation characteristics under weak turbulent condition are analyzed. A segment of 1.5 m holmium-doped fiber is used as gain medium. Actively mode-locked can be realized by introducing periodic intensity modulation into cavity through LiNbO3 intensity modulator. The nonlinear polarization rotation effect is introduced into the cavity to realize the tunable wavelength of 2058.4 nm~2078.6 nm. Stable mode-locked pulses with fundamental frequency and 10th, 24th, 48th order harmonic operations can be obtained. The signal to noise ratio (SNR) of the corresponding radio frequency (RF) spectrum is 66.79 dB, 61.37 dB, 54.82 dB and 49.66 dB. The stable mode-locked pulse modulated by digital signal and is transmitted in a simulated atmospheric turbulence device. The eye patterns can be obtained at the condition of ΔT=70 ℃，140 ℃, 210 ℃ and back-to-back (BTB). The SNR at ΔT=210 ℃ decreased 9.14 dB compared with BTB condition.