Author Affiliations
Abstract
School of Physics and Astronomy, Key Laboratory for Laser Plasmas (Ministry of Education), Collaborative Innovation Center of IFSA (CICIFSA), Shanghai Jiao Tong University, Shanghai 200240, China
We demonstrated a femtosecond mode-locked Er:ZrF4-BaF2-LaF3-AlF3-NaF (Er:ZBLAN) fiber laser at 2.8 μm based on the nonlinear polarization rotation technique. The laser generated an average output power of 317 mW with a repetition rate of 107 MHz and pulse duration as short as 131 fs. To the best of our knowledge, this is the shortest pulse generated directly from a mid-infrared mode-locked Er:ZBLAN fiber laser to date. Numerical simulation and experimental results confirm that reducing the gain fiber length is an effective way to shorten the mode-locked pulse duration in the Er:ZBLAN fiber laser. The work takes an important step towards sub-100-fs mid-infrared pulse generation from mode-locked Er:ZBLAN fiber lasers.
generation mode-locked pulses Er:ZBLAN fiber Chinese Optics Letters
2020, 18(3): 031402
1 中国科学院西安光学精密机械研究所 瞬态光学与光子技术国家重点实验室,西安 710119
2 中国科学院研究生院，北京 100049
利用在腔内加入可调谐光纤光栅滤波器使“8”字形腔掺Yb3+光纤激光器在锁模状态下实现波长连续可调谐.实验中，在保证锁模状态稳定的情况下，通过调节可调谐光纤光栅滤波器，使激光器输出锁模脉冲的中心波长在1 047 nm～1 055 nm范围内连续调谐，重复频率稳定维持在4.9 MHz.在中心波长1 053 nm处，测得锁模脉冲输出平均功率为8.02 mW，光谱带宽1 nm，脉冲宽度为259.3 ps.这种“8”字形腔被动锁模光纤激光器在锁模状态下对波长连续可调谐，并可长时间稳定工作.
波长连续调谐 锁模脉冲 光纤光栅滤波器 “8”字形腔 光纤激光器 掺Yb3+光纤 Wavelength continuous tuning Mode-locked pulses Manual tunable fiber Bragg grating Figure-of-eight laser cavity Fiber lasers Yb3+-doped fiber
